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Dissertations / Theses on the topic 'IRJ performance'
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Pang, Tao, and tony_pang@hotmail com. "Studies on Wheel/Rail Contact Impact Forces at Insulated Rail Joints." Central Queensland University. Centre for Railway Engineering, 2008. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20080410.154708.
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To investigate the wheel/rail contact impact forces at insulated rail joints (IRJs), a three-dimensional finite element model and strain gauged experiments are employed and reported in this thesis. The 3D wheel/rail contact-impact FE model adopts a two-stage analysis strategy in which the wheel-IRJ railhead contact is first established in the static analysis and the results transferred to dynamic analysis for impact simulations. The explicit FE method was employed in the dynamic analysis. The Lagrange Multiplier method and the Penalty method for contact constraint enforcement were adopted for the static and dynamic analyses respectively.
The wheel/rail contact-impact in the vicinity of the end post is exhibited via numerical examples from the FE modelling. The wheel/rail contact impact mechanism is investigated. The strain gauged experiments which consist of a lab test and a field test are reported. The signature of the strain time series from the field test demonstrates a plausible record of the dynamic responses due to the wheel/rail contact impact. By using the experimental data, both the static and the dynamic FE models are validated.
It is found that the stiffness discontinuity of the IRJ structure causes a running surface geometry discontinuity during the wheel passages which then causes the impact in the vicinity of the end post. Through a series of sensitivity studies of several IRJ design parameters, it is shown that the IRJ performance can be effectively improved with optimised design parameters.
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Wang, Hao. "Road Profiler Performance Evaluation and Accuracy Criteria Analysis." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34419.
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Road smoothness is one of the most important road functional characteristics because it affects ride quality, operation cost, and vehicle dynamic load. There are many types of devices that measure the road profile, which is often used to compute different smoothness indices. The development of performance-based specifications and pavement warranties that use ride quality as a performance measure has increased the need for accurate measurement of pavement smoothness. For this reason, researchers have compared and evaluated the performance of available profilers and several profiler accuracy criteria have been proposed. However, there is not a definite answer on the ability of available profilers to accurately measure the actual road profile as well as the various smoothness indices.
A recent profiler round-up compared the performance of 68 profilers on five test sections at Virginia Smart Road. The equipment evaluated included high-speed, light-weight, and walking-speed profilers, in addition to the reference device (rod and level). The test sites included two sites with traditional hot-mix asphalt (HMA) surfaces, one with a coarse-textured HMA surface, one on a continuously reinforced concrete pavement (CRCP), and one on a jointed plain concrete pavement (JCP). This investigation used a sample of the data collected during the experiment to compare the profiles and International Roughness Index (IRI) measured by each type of equipment with each other and with the reference. These comparisons allowed determination of the accuracy and repeatability capabilities of the existing equipment, evaluation of the appropriateness of various profiler accuracy criteria, and recommendations of usage criteria for different applications.
The main conclusion of this investigation is that there are profilers available that can produce the level of accuracy (repeatability and bias) required for construction quality control and assurance. However, the analysis also showed that the accuracy varies significantly even with the same type of device. None of the inertial profilers evaluated met the current IRI bias standard requirements on all five test sites. On average, the profilers evaluated produced more accurate results on the conventional smooth pavement than on the coarse textured pavements. The cross-correlation method appears to have some advantages over the conventional point-to-point statistics method for comparing the measured profiles. On the sites investigated, good cross-correlation among the measured and reference profiles assured acceptable IRI accuracy. Finally, analysis based on Power Spectral Density and gain method showed that the profiler gain errors are nonuniformly distributed and that errors at different wavelengths have variable effects on the IRI bias.Master of Science
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Patsias, Kyriakos. "A HIGH PERFORMANCE GIBBS-SAMPLING ALGORITHM FOR ITEM RESPONSE THEORY MODELS." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1796121011&sid=3&Fmt=2&clientId=1509&RQT=309&VName=PQD.
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Houts, Carrie Rena. "The Performance of Local Dependence Indices with Psychological Data." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1322364626.
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Fang, Yi-chin. "Performance evaluation of discrete IR optical system." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270211.
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Johansson, Fredrik. "Rosetta Langmuir probe performance." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-213146.
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Several Langmuir probe voltage sweeps by a model of the ESA spacecraft Rosetta was simulated in a plasma with solar wind parameters using the ESA open source software SPIS 5. The simulations were carried out to in- vestigate the features of the spacecraft’s environment in the solar wind and the effect of photoemission from the spacecraft surface on the measurements made by the Langmuir probes on board Rosetta. We report a best fit to an existing probe sweep result in the solar wind near the Earth at 1 AU from 9 Nov 2009 for a 4 million particle simulation in SPIS of an 8 V positively charged spacecraft with the following parameters: Tph = 2 eV, Te = 12 eV, Ti = 5 eV, ne = 5 cm−3. We also report that the spacecraft is shielding the Langmuir probes on Rosetta from plasma electrons, and particularly low energy electrons. In one instance, this blocking is shown to lead to an over- estimation of solar wind electron temperature by 12% and underestimate the plasma density by 24% by the Langmuir Probe for a +10 V charged spacecraft in ne= 5 cm−3, Te = 12 eV solar wind. Two models used in lit- erature on photoemission, one for isotropical emission from a plane and the other for radial emission from a point, was used and compared. We report a clear preference to the approximation of a Maxwellian energy distribution of photoelectrons emitted radially from a point source model with our sim- ulation result on the Langmuir Probe aboard Rosetta. We also report the solar aspect angle dependence on the plasma potential and plasma density result, which are in overall agreement with Rosetta measurements from the second Earth fly-by.
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Pessuto, Kelen. "O 'espelho mágico ' do cinema iraniano = uma análise das performances dos "não" atores nos filmes de arte." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/284435.
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Orientador: Francirosy Campos Barbosa FerreiraDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Artes
Made available in DSpace on 2018-08-19T05:09:01Z (GMT). No. of bitstreams: 1 Pessuto_Kelen_M.pdf: 3175741 bytes, checksum: 12122eeb3b192b833dfc0faebb26d576 (MD5) Previous issue date: 2011
Resumo: Esta dissertação analisa as performances dos "não" atores no cinema de arte iraniano, a partir das obras Close-up (Nema-ye Nazdik, 1990, Abbas Kiarostami), Salve o cinema (Salam cinema, 1995, Mohsen Makhmalbaf), Tartarugas podem voar (Lakposhtha parvaz mikonand, 2004, Bahman Ghobadi) e O espelho (Ayneh, 1997, Jafar Panahi). Com base na antropologia da performance, busca-se responder às seguintes perguntas: Quem são os "não" atores? Por que são usados esse tipo de ator em vez de atores profissionais? Quais os métodos empregados em sua direção? Qual a relação que se estabelece entre o ator e o personagem? Para tanto, utiliza-se além da bibliografia pertinente a essa disciplina, ao teatro e ao cinema, o método comparativo, com filmes do mesmo diretor, assim como de outras cinematografias. Conclui-se que não há necessidade do ator ter uma técnica préestabelecida, sendo que a direção proposta por esses cineastas requer o mínimo de atuação. O ator-performer vivencia as situações que lhes são impostas e, a partir disso, cria personagens, algumas vezes baseados em sua própria experiência de vida, como em uma grande brincadeira de faz de conta
Abstract: This thesis analyzes the performance of the "non" actors in the Iranian art cinema, in movies Close-up (Nema-ye Nazdik, 1990, Abbas Kiarostami), Salam cinema (1995, Mohsen Makhmalbaf), Turtles can fly (Lakposhtha parvaz mikonand, 2004, Bahman Ghobadi) and The Mirror (Ayneh, 1997, Jafar Panahi). Based on the anthropology of performance, we seek to answer the following questions: Who are these "non" actors? Why they used that kind of actor instead of professional actors? What are the methods employed in its direction? and What is the relationship established between the actor and character? For this, we use the comparative method, with films from these directors, as well movies by other cinematographies. The conclusion reached is that there is no need for the actor to have a pre-established technique, because the direction proposed by these filmmakers requires minimal action. The actor-performer experience situations that are imposed for them and they create characters, sometimes based on their own experience of life, as in a grand game of make-believe
Mestrado
Artes Cenicas
Mestre em Artes
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Vairaitė, Rūta. "Duomenų filtravimo ir atrankos sprendimų analizė." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080710_114048-38741.
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Esant dideliems saugomų duomenų kiekiams, yra svarbus našus jų apdorojimas, taigi, vartotojams reikia vis didesnio duomenų bazių našumo. Šiame darbe sprendžiama problema, kaip paskatinti duomenų bazes veikti greičiau, kai duomenų bazių lentelės turi labai daug įrašų. Todėl skiriamas dėmesys duomenų bazių spartos derinimui, ar duomenų bazių spartos optimizavimui. Išnagrinėjus duomenų bazių esamus spartinimo metodus ir priežastis, kurios mažina našumą, yra siūlomas metodas, kuris leidžia sparčiau apdoroti ir filtruoti duomenis bei greičiau pateikti vartotojui užklausos rezultatą. Darbui atlikti pasirinkta MS SQL Server duomenų bazių valdymo sistema. Eksperimento metu atliktas užklausų greičio tyrimas, palyginant sudarytą metodą su virtualių lentelių metodu.When the amount of stored data is growing, it is very important to get them fast and users are expecting to see how database performance is rising. Using database performance tuning, or database performance optimization, it is possible to make a database system run faster. In this paper after analysis of database performance optimization and performance tuning methods was suggested a method which enables to process data from database more quick and to user to get query result faster. To perform the research the MS SQL Server Database Management System was chosen. The experiment was performed in order to evaluate how method works. The experiment results show that compared with views, this method has better query performance.
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Strang, Steven J. (Steven James) Carleton University Dissertation Anthropology. "O'Neill's Cavalcade: the nature and functions of Provisional IRA terrorist performances." Ottawa, 1992.
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Agbele, Kehinde Kayode. "Context-awareness for adaptive information retrieval systems." Thesis, University of the Western Cape, 2014. http://hdl.handle.net/11394/3845.
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Philosophiae Doctor - PhDThis research study investigates optimization of IRS to individual information needs in order of relevance. The research addressed development of algorithms that optimize the ranking of documents retrieved from IRS. In this thesis, we present two aspects of context-awareness in IR. Firstly, the design of context of information. The context of a query determines retrieved information relevance. Thus, executing the same query in diverse contexts often leads to diverse result rankings. Secondly, the relevant context aspects should be incorporated in a way that supports the knowledge domain representing users’ interests. In this thesis, the use of evolutionary algorithms is incorporated to improve the effectiveness of IRS. A context-based information retrieval system is developed whose retrieval effectiveness is evaluated using precision and recall metrics. The results demonstrate how to use attributes from user interaction behaviour to improve the IR effectiveness
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Elshukri, Fathi A. "An experimental investigation and improvement of insulated rail joints (IRJs) end post performance." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12066/.
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Insulated rail joints are a safety valve in railways that are used as part of the signalling system to determine the position of a train. Insulated rail joints are the weakest part of the railroad, where their life ranges between a third and half of the life of rails. One of the most significant issues in insulated rail joints is metal flow, and damage and loss of the end post. Major causes of these issues include sliding wear, impact wear, wear due to rolling/sliding contact, and wear due to rail compression and plastic flow of rail material. In this study experimental investigations have been applied to improve insulated rail joints. The aim of this work was to experimentally determine the resistance to sliding wear, impact wear, rolling/sliding contact wear, compression wear of five specimens of end post materials with different properties against train wheel material (steel), and the influence of tests parameters and lubrication on these materials. The end post materials were classified into thermoplastic materials such as Nylon 12, Nylon 66 and Nylon66a materials and thermosetting materials such as Epoxy Glass and Phenolic Resin Bonded Fabric materials according to melting point temperature.
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Borisas, Marius. "Jauno amžiaus vyrų ir moterų funkcinių judesių atlikimo stereotipo ir fizinio pajėgumo įvertinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140122_140259-67563.
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Borisas M., Jauno amžiaus vyrų ir moterų funkcinių judesių atlikimo stereotipo ir fizinio pajėgumo įvertinimas., magistro baigiamasis darbas/mokslinis vadovas doc. dr. L. Šiupšinskas; Lietuvos sveikatos mokslų universiteto, Medicinos akademijos, Slaugos fakulteto, Sporto institutas. – Kaunas, 2013, - 70 p.
Darbo tikslas: įvertinti jauno amžiaus vyrų ir moterų funkcinių judesių atlikimo stereotipą ir fizinį pajėgumą bei jų sąsajas.
Darbo tikslui įgyvendinti buvo iškelti šie uždaviniai: 1. Įvertinti ir palyginti jauno amžiaus vyrų ir moterų funkcinių judesių atlikimo stereotipą. 2. Įvertinti ir palyginti jauno amžiaus vyrų ir moterų fizinį pajėgumą. 3. Įvertinti ir palyginti jauno amžiaus vyrų ir moterų judėjimo sistemos funkcinių judesių atlikimo stereotipo ir fizinio pajėgumo rodiklių sąsajas.
Tyrimas atliktas Lietuvos sveikatos mokslų universiteto Medicinos akademijos Slaugos fakulteto Sporto institute. Tyrime dalyvavo 102 tiriamieji (52 vyrai ir 50 moterų). Vyrų grupė 52 asmenys, moterų grupė 50 asmenų. Amžiaus vidurkis 21,9 ± 2,8 metai (± SEM, standartinė vidurkio įverčio paklaida). Kūno masės indekso vidurkis 22,7 ± 1,9 kg/m².
Tiriamieji atliko funkcinių judesių atlikimo stereotipo įvertinimo testus tokia tvarka: gilaus pritūpimo, žengimo per barjerą, įtūpsto, pečių mobilumo, aktyvaus tiesios kojos kėlimo, atsispaudimo stabiliu liemeniu, rotacinio stabilumo testus. Pailsėjus 10 minučių tą pačią tyrimo dieną tiriamieji atliko Eurofito testus: flamingo, plaštakos... [toliau žr. visą tekstą]M. Borisas. Young man and woomen Functional Movement Screen and Physical Performance evaluation, master thesis/ supervisor doc. dr. L. Šiupšinskas; Lithuanian University of health sciences; Academy of medicine, Faculty of nursing, Institute of Sport. – Kaunas, 2013. p. 70. The aim of the study: evaluate young man and women group’s indicators of Functional Movement Screen and Physical Performance and the correlations. Goals of this research: 1. Evaluate and compare young men and women Functional Movements Screen. 2. Evaluate and compare Physical Performance in young age men and women groups. 3. To evaluate and compare the young men's and the women's Functional Movement Screenand physical performance indicators interfaces. The study was conducted Lithuanian University of Health Sciences, Medical Academy of Nursing, Faculty of Sports Institute. The study included 102 subjects (52 men and 50 women). A group of men 52, women 50 persons in the group. Mean age 21.9 ± 2.8 years (± SEM, standard error of the mean estimate). Average body mass index 22.7 ± 1.9 kg/m². Participants performed Functional Movement Screen, Eurofit test batteries. Research carried out by performing functional movement screen assessment tests in the following order: a deep squat, hurdle step, in line lunge, shoulder mobility, active straight leg rise, trunk stability push-up, rotary stability tests. Resting for 10 minutes on the same day of the study subjects performed Eurofit tests: flamingo, plate teping... [to full text]
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King, Rachel Throop. "Using MM-IRT-C to Explore the Relationship between Depression and Pre-employment Tests." Bowling Green State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1490210265946655.
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Klofas, Jeffrey M. "Hedge Funds and Financial Crises: 2007 - 2009 Performance Characteristics." Thesis, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:106755.
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Thesis advisor: Peter IrelandWe study historical hedge fund performance characteristics with a particular focus on the 2007 – 2009 Financial Crisis (the “Crisis”). Using the Credit Suisse Hedge Fund Indexes as proxies for broader hedge fund industry performance, we apply a factor model based on common investment strategies to determine if the broad industry or any particular hedge fund strategies have been able to deliver excess returns, or alpha. We find evidence that the broad hedge fund index did deliver statistically significant excess monthly returns of 0.39% (4.67% annualized) over the period January 1995 – January 2016, with seven of ten individual strategy indexes contributing. However, our results indicate that these excess returns were delivered primarily during the pre-Crisis period of January 1995 – November 2007. Over this period, the broad index delivered statistically significant monthly excess returns of 0.49% (5.93% annualized), with six of ten individual strategy indexes contributing. Our results do not indicate, however, that hedge funds delivered statistically significant monthly excess returns over the period December 2007 – June 2009 or over the period December 2007 – December 2012, which takes into account the uniquely drawn out recovery from the Crisis. We find that the broad index delivered statistically significant excess monthly returns of 0.23% (2.74% annualized) during the post-Crisis period, though these returns are less than half of the pre-Crisis period returns and only three individual strategy indexes contributed. We posit that this apparent shift in performance characteristics might be the result of a shift in the risk tolerances of hedge fund investors and managers following the Crisis. We conclude that, while hedge funds might certainly serve legitimate purposes in financial markets, they are not immune to financial crises, especially those as severe as the Crisis
Thesis (BA) — Boston College, 2016
Submitted to: Boston College. College of Arts and Sciences
Discipline: Arts and Sciences Honors Program
Discipline: Economics
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Gaubas, Paulius. "Organizacinis teisingumas darbo atlikimo vertinime ir jo sąsajos su nuostatomis darbo atžvilgiu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20140626_194730-80771.
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Šiame darbe tyrėme organizacinio teisingumo reiškinį apsiribodami darbo atlikimo vertinimo (toliau - DAV) kontekstu, nes yra duomenų, kad suvoktas DAV teisingumas ankstesniuose tyrimuose buvo susijęs su darbo atlikimo vertinimo sistemos efektyvumu ir kitomis pasekmėmis organizacijai. Didžiausias dėmesys tyrime buvo skirtas darbo atlikimo vertinimo proceso veiksnių sąsajų su DAV teisingumu tyrimui. Kaip pasekmes organizacijai mes tyrėme nuostatas darbo atžvilgiu. Nagrinėjome ryšius tarp DAV teisingumo ir pasitenkinimo darbu bei ketinimo keisti darbą. Tyrime apklausta 117 dirbančių asmenų, kurių darbo atlikimas periodiškai yra įvertinamas ir aptariamas su tiesioginiais vadovais. Tyrimu siekėme išsiaiškinti, kokie darbo atlikimo vertinimo proceso (DAV sistemos, vertinimo pokalbio, ir veiksniai ne vertinamojo pokalbio metu) organizacinio teisingumo veiksniai yra susiję su suvoktu DAV teisingumu. Nustatyta, kad didžioji dauguma,11 iš 13, veiksnių statistiškai reikšmingai susiję su DAV teisingumo įverčiais (koreliacijos koeficientai svyravo nuo 0,33 iki 0,76). Nesusiję su DAV teisingumu buvo du veiksniai – DAV sistemos sudėtingumas ir procedūros, užtikrinančios papildomą aukštesniosios vadovybės darbo atlikimo įvertinimo tikslumo kontrolę. Darbuotojų suvoktą DAV teisingumą įtakoja trys DAV proceso veiksniai: bendradarbiavimas darbo atlikimo vertinimo aptarime, darbo atlikimo vertinimo pokalbio (ne)malonumas ir darbo atlikimo – gauto įvertinimo atitikimas. Pirmieji du veiksniai... [toliau žr. visą tekstą]While exploring organizational justice phenomenon, we limited our scope to specific area of work relationship and decision making – performance evaluation. We used past research notion from literature that performance appraisal (PA) fairness is related to PA system effectiveness and various organizational outcomes such as work attitudes. The main part our attention was focused on the relationship of PA process variables and PA fairness. We explored relationship of PA fairness and two work related attitudes – job satisfaction and intention to turnover. We distributed our questionnaire to 117 employed Lithuanian persons, whose performance appraisal is evaluated and discussed with manager at least once a year. 88 percent of subjects were woman, mostly with university degree. In our research we were looking for the answer, which PA process variables (PA system, PA session, non-session) are related to PA fairness. Results indicated, that majority of variables (11 out of 13) were significantly correlated with PA fairness (correlation ranging from 0.33 to 0.76). System complexity and multiple inputs of management in PA items were not correlated with PA fairness. This data is opposite to (Giles et al., 1997) findings for US sample. PA fairness can be predicted by 3 variables, accounting for 77% variance. These variables are session participation, session unpleasantness and performance-rating linkage. Firs two items we prescribed interactional justice emanating from manager, and the... [to full text]
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Norušaitienė, Ieva. "Veiklos pamatavimo metodų taikymas Kauno ir Klaipėdos miestų savivaldybėse." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20080201_101235-56007.
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Kiekviena valstybės institucija atlieka tam tikrą veiklą, vykdydama jai pavestas funkcijas. Visuose institucijos veiklos etapuose galima išskirti rezultatus, kuriuos galima įvertinti (pamatuoti) bei už juos atsiskaityti. Nors ir sunku pasverti kai kuriuos institucijos rezultatus, tačiau vis aiškiau matyti, jog, norint garantuoti institucijos veiklos rezultatyvumą, vertinimas yra neišvengiamas.
Tačiau nors visais laikais buvo vertinami ir analizuojami institucijų sprendimai, projektų, programų rezultatai, bet iki šiol veiklos pamatavimo metodai išplėtoti gana silpnai. Todėl mokslinio tiriamojo darbo tema „Veiklos pamatavimo metodų taikymas Kauno ir Klaipėdos miestų savivaldybėse“ yra itin aktuali, nes veiklos vertinimas parodo, kaip organizacija veikia. Jeigu mes nevertinsime veiklos, mes negalėsime nustatyti, kaip organizacija veikia, ir negalėsime jos valdyti bei pagerinti jos veiklos.
Siekdami išnagrinėti temą „Veiklos pamatavimo metodų taikymas Kauno ir Klaipėdos miestų savivaldybėse“ iškėlėme darbo tikslą – atskleisti veiklos pamatavimo esmę ir nustatyti veiklos pamatavimo metodus, taikomus konkrečioje institucijoje. O norint pasiekti šį darbo tikslą reikia įgyvendinti ir tokius darbo uždavinius:
• Išsiaiškinti, kokia yra veiklos pamatavimo esmė.
• Atskleisti geriausios praktikos siekimo metodo reikšmę, gerinant veiklos kokybę.
• Nustatyti, kokie veiklos pamatavimo metodai taikomi konkrečioje institucijoje.
Tam, kad būtų įgyvendintas mokslinio tiriamojo darbo tikslas... [toliau žr. visą tekstą]Everyone state institution does particular performance, in order it would implement it’s functions. There is possible to separate results in all phases of institution performance, which possible to measure and is possible to account for it. Though is hard to measure several results of institution, but if you want to guarantee the efficiency of institution performance, measurement is unavoidable. Though the solutions of institutions, the results of projects and programmes always were measured and analyzed, but still performance measurement methods are developed rather low. So theme of the study „Performance Measurement Methods Use in Local Authorities of Kaunas and Klaipeda“ is very actually, because performance measurement show us, how organization is working. If we do not measure performance, we can not identify, how organization works, and we can not control it and improve it performance. With a view to examine theme „Performance Measurement Methods in Local Authorities of Kaunas and Klaipeda“ we defined the main idea of the study – to detect the point of performance measurement and to identify performance measurement methods, which are used in concrete institution. In order to realize this idea of the study, it is necessary these goals: • To explore, what is the point of performance measurement. • To detect meaning of benchmarking, in order to improve the quality of performance. • To define, what performance measurement methods are applied in concrete institution. In... [to full text]
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Curry, Brendan. "Mic Drop: The Volatility of Employment and Income for Professional Musicians Before and During the COVID-19 Pandemic." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109163.
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Thesis advisor: Matthew S. RutledgeThis paper finds that musicians have more variable work schedules than comparable gig occupations and they are typically more disadvantaged in finding suitable employment opportunities. They are more likely to be self-employed and face the challenges that come with that status, and typically have less financial freedom. They also often work part-time due to the nature of the profession or take on multiple jobs to financially sustain themselves and their families financially. The pandemic has caused already-low hours for musicians to decrease further, still not fully recovering due to all live events being canceled, without the same ability to work remotely as similar gig occupations. These economic detriments have been accumulating for years as a result of the unstable music industry and the effects have multiplied after the COVID-19 pandemic, leaving musicians searching for a way forward within a broken system
Thesis (BA) — Boston College, 2021
Submitted to: Boston College. College of Arts and Sciences
Discipline: Departmental Honors
Discipline: Economics
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Cato, Hampus. "Correlation Between 3000-meter Running Performance, Yo-Yo IR1 & Submaximal Treadmill Jogging Test." Thesis, Högskolan i Halmstad, Bio- och miljösystemforskning (BLESS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-31875.
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Background: Physiologic functional capacity through maximal oxygen uptake (V̇O2max) can be measured in many different ways depending on sport and qualities needed to be assessed.In handball a demanding 3000 meter (m) running test is used to evaluate V̇O2max. If this test is sport specific or if it could be replaced by a less strenuous test is unknown. Aim: The aim ofthis study was to compare performance on 3000-meter running with predicted V̇O2max from a submaximal treadmill jogging test (SMTJ) and performance of the Yo-Yo intermittentrecovery test 1 (IR1). Methods: Male handball players (n = 12) performed the 3000 m running test, the Submaximal Treadmill Jogging test and the Yo-Yo Intermittent Recovery test level 1. Measurements in seconds (s), ml ∙ kg-1 ∙ min-1 and meters where collected and correlated using Pearson r, interclass correlation. Results: A strong significant linear correlation (p < 0.01) was found between performance in 3000 m running (s) and Yo-Yo IR1 performance (m), r = - 0.724 (r2 = 0.524). A weak, not significant linear correlation (p > 0.05)was found between performance in 3000 m running (s) and predicted V̇O2max from submaximal treadmill test (ml ∙ kg-1 ∙ min-1), r = - 0.309 (r2 = 0.095). Conclusion: According to this study the 3000 m running test could be replaced by the Yo-Yo IR1 test or vice versa in adolescent male handball players. The submaximal treadmill test used in this study had several potential errors in estimating V̇O2max, this is probably the reason why only a weak correlation was found between the SMTJ and the 3000 m running test.
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Ralph, Gary M. "Characterization of the radiometric performance of an IR scene projector /." Online version of thesis, 1994. http://hdl.handle.net/1850/11973.
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Darmon, Céline. "Réactivité visuo-manuelle, contrôle du geste et expertise motrice : étude en IRM fonctionnelle événementielle." Université Joseph Fourier (Grenoble), 2006. http://www.theses.fr/2006GRE10097.
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Etude en IRM sur la réactivité visuo-manuelle intentionnelle et l'expertise sensorimotrice : la correction de trajectoire manuelle en cours de mouvement conduit à sur activer le réseau cérébral impliqué dans pointage direct (aires visuelles occipitales, associatives pariétales, frontales motrices, prémotrices et oculo-motrices, thalamus, ganglions de la base et cervelet). Les aires sensorielles et motrices primaires sont plus fortement sollicités chez les sujets contrôles, alors que les Escrimeurs activent plus fortement les aires d'intégration sensorimotrice de haut niveau (aires pariétales, prémotrices, sous-corticales et cérébelleuses). Le contrôle visuo-manuel semble donc reposer sur des boucles neuronales imbriquées, sous-tendant des modules opérationnels plus ou moins recrutés selon les contraintes d'exécution du mouvement. Il apparaît que l'expertise sensorimotrice liée à la pratique sportive peut conduire à des modifications des cartes fonctionnelles cérébralesThis study aims to identify the neural network involved in the intentional visuo-manual control and to explore behavioural and functional effects of a long term practice of sports, as fencing. The double step paradigm adapted to event-related fMRI study shows that intentional trajectory corrections conduct to an over-activation of the cerebral network underlying visuo-manual control (including occipital visual areas, parietal areas, frontal motor, premotor and oculomotor areas, thalamus, basal ganglia and the cerebellum). Fencers' visuomanual performances rely more on the associative and executive cerebral areas while control subjects' performances recruit more the visual areas. The visuomanual control relies on neural loop underlying operational modules gradually recruited related to the behavioural and environmental constraints. Sensorimotor expertise related to practice of sport can conduct to modify cerebral functional map
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Cheng, Qingmei. "Materials Design toward High Performance Electrodes for Advanced Energy Storage Applications." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:108116.
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Thesis advisor: Udayan MohantyRechargeable batteries, especially lithium ion batteries, have greatly transformed mobile electronic devices nowadays. Due to the ever-depletion of fossil fuel and the need to reduce CO2 emissions, the development of batteries needs to extend the success in small electronic devices to other fields such as electric vehicles and large-scale renewable energy storage. Li-ion batteries, however, even when fully developed, may not meet the requirements for future electric vehicles and grid-scale energy storage due to the inherent limitations related with intercalation chemistry. As such, alternative battery systems should be developed in order to meet these important future applications. This dissertation presents our successes in improving Li-O2 battery performance for electric vehicle application and integrating a redox flow battery into a photoelectrochemical cell for direct solar energy storage application. Li-O2 batteries have attracted much attention in recent years for electric vehicle application since it offers much higher gravimetric energy density than Li-ion ones. However, the development of this technology has been greatly hindered by the poor cycling performance. The key reason is the instability of carbon cathode under operation conditions. Our strategy is to protect the carbon cathode from reactive intermediates by a thin uniform layer grown by atomic layer depostion. The protected electrode significantly minimized parasitic reactions and enhanced cycling performance. Furthermore, the well-defined pore structures in our carbon electrode also enabled the fundamental studies of cathode reactions. Redox flow batteries (RFB), on the other hand, are well-suited for large-scale stationary energy storage in general, and for intermittent, renewable energy storage in particular. The efficient capture, storage and dispatch of renewable solar energy are major challenges to expand solar energy utilization. Solar rechargeable redox flow batteries (SRFBs) offer a highly promising solution by directly converting and storing solar energy in a RFB with the integration of a photoelectrochemical cell. One major challenge in this field is the low cell open-circuit potential, mainly due to the insufficient photovoltages of the photoelectrode systems. By combining two highly efficient photoelectrodes, Ta3N5 and Si (coated with GaN), we show that a high-voltage SRFB could be unassistedly photocharged and discharged with a high solar-to-chemical efficiency
Thesis (PhD) — Boston College, 2018
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Chemistry
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Keblytė, Roberta. "Į veiklos audito specialistų veiklą nukreipta kompetencija, jos turinys ir pripažinimas Europos aukščiausiose audito institucijose." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130625_180350-89842.
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Magistro baigiamajame darbe išanalizuota į veiklos audito specialistų veiklą nukreipta kompetencija, jos turinys ir pripažinimas Europos AAI, įvertintas Europos AAI atstovų požiūris į veiklos audito specialistų sertifikavimo galimybę. Pirmoje darbo dalyje atskleista veiklos audito samprata, vieta ir reikšmė audito sistemoje, Europos AAI veiklos audito raida bei esminiai veiklos audito bruožai. Antroje dalyje atskleista veiklos audito specialistų samprata, kompetencija ir strateginiai individo kompetencijos tobulinimo būdai. Trečioje dalyje nustatomi į veiklos audito specialistus nukreiptos kompetencijos elementai: asmeninės savybės, žinios ir įgūdžiai, išsilavinimas, darbo patirtis, audito patirtis, auditorių mokymai. Ketvirtoje dalyje įvertinami į veiklos audito specialistų veiklą nukreipti kompetencijos elementai bei palyginamas šių kompetencijos elementų pripažinimas Europos AAI, nustatomi Europos AAI atstovų požiūriai į veiklos audito specialistų sertifikavimo galimybę.The goal of master’s thesis is to analyse performance audit specialists competence, its content which is pointed to their activity, appreciation by Europe’s SAI and evaluate Europe’s SAI representatives attitude towards the possibility to certificate the performance audit specialists. In the first part of master’s thesis performance audit conception, its place and significance in the audit system, Europe’s SAI evolution of performance audit and fundamental performance audit features are revealed. In the second part of master’s thesis author unclosed the conception of performance audit specialists, competence and strategic individual competence development methods. In the third part of master’s thesis it is determined the performance audit specialists competence elements of content: personal features, knowledge, skills, background, work experience, audit work experience, auditor’s education. In the fourth part of master’s thesis the author evaluated performance audit specialists elements of competence and compared appreciation of these competence elements by different Europe’s SAI, defined Europe’s SAI attitudes towards the possibility to certificate performance audit specialists.
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Norkus, Virgilijus. "Grojimo variniais pučiamaisiais instrumentais specifika ir pagrindiniai principai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140603_152927-89961.
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Šiame magistro darbe nagrinėjama grojimo variniais pučiamaisiais instrumentais specifika ir pagrindiniai principai. Variniai pučiamieji nuo kitų instrumentų grupių visų pirma skiriasi tuo, kad už instrumento skleidžiamą garsą didžiąja dalimi atsakingas atlikėjo kūnas - koordinuota įvairių organų veikla. Atlikėjui tai reiškia, kad sėkmingas grojimas neišvengiamai priklauso nuo atlikėjo grojimo aparato - veido, kaklo, liežuvio raumenų, kvėpavimo organų, rankų pirštų tinkamo parengimo. Šio darbo tikslas yra nustatyti grojimui variniais pučiamaisiais instrumentais reikalingas žmogaus organų grupes ir išsiaiškinti kaip jos turi būti lavinamos, siekiant ugdyti visapusišką ir profesionalų varinių pučiamųjų instrumentų atlikėją. Siekiant išsikelto tikslo buvo atlikta grojimo variniais pučiamaisiais instrumentais metodinių priemonių, kitos teorinės ir mokomosios medžiagos analizė. Tyrime nustatyta, kad esminėmis atlikėjo grojimo aparato dalimis laikytinas taisyklingas kvėpavimas, ambušiūro raumenys, liežuvio artikuliacija ir rankų pirštų veikla. Darbe pateikiami šių dalių lavinimo pratimai ir atskleista, kad sėkmingam ir pasamoningam atlikimui būtina kasdienė praktika ir treniravimasis. Darbe pateikiami šių treniruočių pavyzdžiai.This masters thesis is focused on specifics and main principles of playing brass instruments. Brass instruments are different from other instrument groups mainly because the main thing that is responsible for the generation of sound is not an instrument itself, but the body of the player - coordinated action of different organs of the player. This means that successful playing is inevitably dependant on the condition an preparedness of 'playing apparatus' of the player - facial, tongue, neck muscles, breathing organs, fingers etc. The aim of the thesis is to identify the main groups of body organs needed to successfully play brass, and to find out how they should be trained to prepare universal and professional brass player. In order to reach the aim, a research of brass teaching literature an other theoretical material, was conducted. Research shows that the main parts of 'playing apparatus' are: correct breathing, embouchure, tongue articulation and actions of the hand and fingers of the player. This thesis contains different training exercises. This thesis also concludes that in order to be successful the player must be subjected to daily training and practicing. The thesis also contains examples of such daily training.
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Petkov, Ivan. "Essays on Local Determinants of Economic Growth." Thesis, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:106789.
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Thesis advisor: Fabio SchiantarelliThe fundamental concept unifying this thesis is that outcomes at small geographical units can shed light on key economic questions of interest for both macroeconomics and finance. Some of the questions I explore in my work include whether bank networks facilitate access to financial capital by small businesses in the US, whether lending to small businesses is important for short-term economic growth, and whether different cultural and institutional endowments improve economic outcomes in the long run.\\ Small Business Lending and the Bank-Branch Network: In this chapter, I examine the role of banks in propagating local economic shocks from one area to another through their network of bank branches, by exploiting a newly developed branch-level dataset. Specifically, I examine the change in the geographical distribution of small business loans within each bank network in response to: 1) increases in deposit growth due to presence in areas with new fracking wells; 2) changes in the profitability of real estate loans due to presence in areas experiencing real estate booms. I evaluate how the supply-driven changes in lending following these shocks impact real economic activity. I find that banks export the increase in liquidity from the fracking areas and fund more small business loans at other, more distant branches. Borrowers from banks with a higher exposure to fracking experience faster establishment growth at areas beyond 100 miles from the fracking activity. The results for the real estate booms show that increases in the return of real estate loans contributed to a decrease in small business lending at branches away these booms. Borrowers from banks with high exposure to residential appreciation experienced slower establishment growth even within areas at a significant distance from the real estate booms.\\ Does It Matter Where You Came From? Ancestry Composition and Economic Performance of US Counties, 1850 - 2010: The United States provides a unique laboratory for understanding how the cultural, institutional, and human capital endowments of immigrant groups shape economic outcomes. In this paper, we use census micro-samples to reconstruct the country-of-ancestry composition of the population of US counties from 1850 to 2010. We also develop a county-level measure of GDP per capita over the same period. Using this novel panel data set, we show that the evolution of the country-of-origin composition of a county is significantly associated with changes in county-level GDP. The cultural, institutional, and human capital endowments from the country of origin drive this association. Particularly important are attitudes towards cooperation with others. Using an instrumental variable strategy, we identify a significant effect of changes in the ancestry-weighted endowments on economic development. Finally, our results suggest that while the fractionalization of ancestry groups is positively related to county GDP, fractionalization in attributes such as trust is negatively related to local economic performance. \\ Culture: Persistence and Evolution: This paper presents evidence on the speed of evolution (or lack thereof) of a wide range of values and beliefs of different generations of European immigrants to the US and interprets the evidence in the light of a simple model of socialization and identity choice. The main result is that persistence differs greatly across cultural attitudes. For instance, many family values, political orientation, and most deep personal religious values converge slowly to the prevailing US norm. Others, such as attitudes toward cooperation, children's independence, and sexual matters, converge rather quickly. The results obtained studying higher generation immigrants differ greatly from those found when the analysis is limited to the second generation, as typically done in the literature, and they imply a lesser degree of persistence than previously thought. Finally, we show that persistence is ``culture specific'' in the sense that the country from which one's ancestors came matters for the pattern of generational convergence
Thesis (PhD) — Boston College, 2016
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Economics
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Kong, Lei. "Essays in Corporate Finance and Innovation." Thesis, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:106884.
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Thesis advisor: Thomas ChemmanurMy dissertation is comprised of three chapters. The first chapter studies the impact of government spending on corporate innovation output. By exploiting the changes in Senate committee chairmanships as a source of exogenous variation in state-level federal government expenditures, I find that firms headquartered in states with increases in government spending significantly reduce their innovation output, as measured both by patent count and patent citations. These reductions are mostly concentrated in industries that need more labor input for innovative activities and firms headquartered in states with lower unemployment rates. I also analyze three possible channels through which an increase in government spending may affect innovation output: resource reallocation by corporations and individuals from innovative to non-innovative activities; partial movement of innovative activities from the corporate to the government sector; and a reduction in inventor productivity due to a labor-leisure trade-off. My evidence provides the strongest support for the resource reallocation channel. In the second chapter, co-authored with Thomas Chemmanur and Karthik Krishnan, we analyze the relationship between the human capital or “management quality” of firms and their long-run performance, using panel data from the BoardEx database on firms' top management characteristics and a management quality index constructed using common factor analysis on individual proxies for various aspects of management quality. We control for the potential endogenous matching between firm and management quality using a plausibly exogenous shock to the supply of new managers as an instrument. Using this instrument, we find a causal relationship between firms' management quality and future operating performance, market valuations, and stock returns. In the third chapter, co-authored with Thomas Chemmanur, Karthik Krishnan, and Qianqian Yu, using panel data on top management characteristics and a management quality factor constructed using common factor analysis on individual management quality proxies, we analyze the relation between the human capital or “quality” of firm management and its innovation inputs and outputs. We control for the endogenous matching between firm and management quality using a plausibly exogenous shock to the supply of new managers as an instrument, thereby finding a causal relationship between management quality and innovation activities. We show that higher management quality firms achieve greater innovation output by hiring more and higher quality inventors
Thesis (PhD) — Boston College, 2016
Submitted to: Boston College. Carroll School of Management
Discipline: Finance
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Dulaney, Alana. "The Roles of Visuospatial and Verbal Working Memory in Children's Mathematical Performance." Thesis, Boston College, 2014. http://hdl.handle.net/2345/bc-ir:104071.
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Thesis advisor: Marina VasilyevaThe ability to mentally store and manipulate information, termed working memory (WM), is essential to mathematical performance. Yet, little research has investigated the mechanisms through which WM capacity is related to mathematical performance in children. Furthermore, the extent to which children utilize specific WM resources when executing mathematical tasks is poorly understood. Addressing these gaps, this research investigated the nature of relations between WM and children's mathematical performance. Participants were 56 second and 32 fourth grade students from public and private elementary schools. Students completed tasks measuring their visuospatial-WM and verbal-WM capacities, the strength of their spatial and symbolic representations of numerical magnitude, and arithmetic performance. Arithmetic strategies were also assessed. In a dual-task condition, children's WM resources were experimentally manipulated: children completed mathematical tasks while retaining visuospatial and verbal stimuli in memory. Results showed that the relation between visuospatial-WM capacity and arithmetic accuracy was mediated by children's spatial numeric representations and the frequency of using a decomposition strategy in solving arithmetic problems. Conversely, the relation between verbal-WM and arithmetic accuracy was mediated by the frequency of using retrieval strategies in solving arithmetic problems. Additionally, the extent to which specific WM resources were involved in children's math performance varied by math task and children's skill level. Verbal-WM resources appeared to be minimally involved in children's spatial numerical representations, but highly involved in symbolic numerical representations and arithmetic calculations. On all math tasks, visuospatial-WM resources were involved to a greater extent among highly skilled children than low-skill children. The results suggest that WM capacity might improve spatial numerical representations and lead children to use memory-based arithmetic strategies more frequently, resulting in better arithmetic performance. Regardless of WM capacity, children who heavily use visuospatial-WM resources are more successful in executing mathematical tasks than children who rely on these resources minimally. These findings contribute to our understanding of how WM can facilitate children's mathematical performance. Implications for identifying specific challenges in children's mathematical learning are discussed
Thesis (PhD) — Boston College, 2014
Submitted to: Boston College. Lynch School of Education
Discipline: Counseling, Developmental and Educational Psychology
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Sheehan, Margaret K. "Enhanced Performance in Electrochemical Energy Storage and Conversion via Carbon-Integrated Nanostructures." Thesis, Boston College, 2016. http://hdl.handle.net/2345/bc-ir:107261.
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Thesis advisor: Chia-Kuang TsungElectrochemical energy storage and conversion applications benefit from the integration of nanostructures into the devices, as they have many more active sites per gram which enables excellent mass utilization of the active species. By controlling the surface of fuel cell catalysts, higher activity and efficiency can be achieved as compared to the bulk counterpart, with multiple catalyst facets of varying activity and efficiency. Nanostructured electrochemical capacitors have enhanced electrolyte diffusion over the surface of the electrode, facilitating high rate capability. Nanostructured materials for energy storage and conversion devices, such as electrochemical capacitors and proton exchange membrane fuel cells, can perform even better with the incorporation of carbon. High surface area carbon can enhance the activity of electrochemical capacitors by improving the conductivity of the electrode and/or enhancing the double layer capacitance. Carbon supports for fuel cell catalysts enable proper dispersion of active material without sacrificing conductivity. The work reported in this thesis is aimed toward improving the performance of electrochemical energy storage and conversion devices through novel incorporation of carbon. Carbon was first used to enhance the performance of electrocatalysts. By wrapping fuel cell catalysts in a porous carbon shell, the activity was increased over its bare and CNT-supported counterparts. The carbon shell synthetic method reported here is a good route to the production of a conductive host for Pd electrocatalysts with good contact and in one step with the formation of the Pd nanoparticles. Carbon was also used to enhance the performance of pseudocapacitors, first by incorporating it into the precursor spray solution in the generation of mesoporous metal oxides and then as a metal-organic framework-derived carbon host with dispersed electrochemically active metal oxides. A carbon network was generated from the pyrolysis of pore directing agents during the decomposition of precursor metal nitrates in the generation of mesoporous manganese oxides in a modified spray pyrolysis approach. The addition of Super P to the precursor spray solution further enhanced the conductivity of the material, enabling the formation of high-performing pseudocapacitors. Lastly, nitrogen-doped carbon cubes produced from thermally-treated parent ZIF-8 cubes were tested as electrochemical capacitors and found to have higher specific capacitance than the nitrogen-doped carbon generated from the parent ZIF-8 rhombic dodecahedra. ZIF-67 cubes were then thermally treated to yield cubic nitrogen-doped carbon hosts for the generated cobalt nanoparticles. Once the cobalt particles were oxidized, the cobalt oxide/carbon hybrid structure exhibited the best pseudocapacitive performance of the ZIF-derived carbon materials tested, exhibiting high specific capacitance and good capacitance retention with increased scan rates and prolonged cycling. Each of the materials tested for electrochemical energy storage and conversion saw an enhancement in performance with the addition of carbon. The results reported here illustrate the importance of carbon in electrochemical cells and the importance of continuing research to modify and improve the methods for carbon production and integration
Thesis (PhD) — Boston College, 2016
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Chemistry
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Panero, Maria Eugenia. "Rating the Acting Moment: Dissociation, Flow, and Empathy after a Monologue Performance." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:107956.
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Thesis advisor: Ellen WinnerActors make imagined characters in imaginary circumstances come alive, as if they were real. What cognitive processes make it possible for actors to accomplish this feat? The goal of this dissertation was to examine three characteristics that actors may possess and that might make this possible: dissociation, flow, and empathy. Acting students (n = 44) and non-acting students (n = 43) first completed a baseline measure of dissociation, and then performed a monologue that was given to them. This performance was recorded and later rated on dimensions of acting. Participants next completed self-report measures of dissociation, flow, and empathy. It was hypothesized that acting students would score higher than non-acting students on all three measures, and that dissociation of all participants would increase post-performance. I also assessed whether acting experience, dissociation, flow, empathy, and/or the time taken to prepare the monologue for performance predicted performance ratings. The results revealed that acting students scored significantly higher than non-acting students on flow (and some of its subscales) and empathy (and some of its subscales). Although no group differences emerged on pre-performance levels of dissociation, only acting students significantly increased their level of dissociation post-performance. Finally, acting experience was the only significant predictor of performance ratings for both acting and non-acting students. This research demonstrates that, compared to non-acting students, acting students report higher levels of empathy and flow immediately after performing a monologue. Additionally for acting students, levels of dissociation rise after performing the monologue. Empathy and dissociation are likely important tools used by actors to “become” a character, and flow is likely the result of actors’ ability to immerse themselves fully in the performance. Nevertheless, acting experience is the strongest predictor of how a performance will be rated
Thesis (PhD) — Boston College, 2018
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Psychology
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Vaitūnaitytė, Malvina. "Fenolinių junginių kokybinės ir kiekybinės sudėties įvairavimo šermukšnių (S. aucuparia l.) lapuose ir žieduose tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134222-34665.
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Tyrimo objektas ir metodai: Sorbus L. genties augalo S. aucuparia L. lapų ir žiedų tyrimas. Bendras fenolinių junginių kiekis paprastojo šermukšnio augalinėse žaliavose nustatytas UV spektrofotometriniu metodu, fenolinės rūgštys ir flavonoidai nustatyti ESC metodu.
Darbo tikslas: nustatyti S. aucuparia L. lapuose ir žieduose esančius fenolinius junginius, jų kiekinės sudėties įvairavimą augalo vegetacijos metu ir augalinių žaliavų (lapų ir žiedų) laikymo metu.
Darbo uždaviniai: Surinkti ir susisteminti literatūros duomenis apie Sorbus aucuparia L., paprastojo šermukšnio augalinių žaliavų cheminę sudėtį, fenolinių junginių analizės metodus, poveikį ir panaudojimą medicinos praktikoje; Ištirti S. aucuparia L. lapų ir žiedų kiekybinę fenolinių junginių sudėtį ir nustatyti bendro fenolinių junginių kiekio įvairavimą augalo vegetacijos metu; Ištirti S. aucuparia L. lapų ir žiedų kokybinę ir kiekybinę fenolinių rūgščių ir flavonoidų sudėtį ir nustatyti jų kiekinės sudėties kitimą augalų vegetacijos periodo metu; Nustatyti S. aucuparia L. lapuose ir žieduose esančių fenolinių junginių kiekybinės sudėties kitimus augalinių žaliavų laikymo metu.
Išvados: S. aucuparia L. augalinės žaliavos gali būti kaip šaltinis išskiriant biologiškai aktyvius junginius, kurie gali būti naudojami medicinos praktikoje. S. aucuparia L. lapuose ir žieduose esančių junginių kiekis kinta augalo vegetacijos metu; lapuose daugiausia fenolinių junginių sukaupiama gegužės - birželio mėn., žieduose – žydėjimo... [toliau žr. visą tekstą]Object and methods: Sorbus aucuparia L. leaves and flowers study. Total amaunt of phenolic compounds in mountain ash leaves and flowers were evaluated using UV spectrophotometry, phenolic acids and flavonoids were identified and evaluated using HPLC. Aim: to identify and evaluate the content of phenolic compounds in rowan leaves and flowers during mountain ash vegetation and during plant materials (leaves and flowers) storage. Objective: to collect and organise the information about the use of Sorbus aucuparia L., S. aucuparia L. leaves and flowers acumulated compounds, phenolic compounds analysis methods and the impact of the use in medical practice; to perform quantitative analysis of S. aucuparia L. leaves and flowers phenolic compounds and to determine the total phenolics content during rowan growing season; to perform qualitative and quantitative analysis of S. aucuparia L. leaves and flowers phenolic acids and flavonoids and to determine the variation of the phenolics content during rowan growing season; to determine phenolic compounds content changes in Sorbus aucuparia L. plant materials (flowers and leaves) during them storage. Conclusions: S. aucuparia L. leaves and flower is a source of biological active substances which can be used in medicinal practice. Phenolic compounds content in S. aucuparia L. leaves and flowers change during vegetation; mainly phenolic compounds in leaves was accumulated in May - June, in flowers - in the beginning of flowering and massive... [to full text]
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Avrillon, Simon. "Coordination des muscles ischio-jambiers : de la performance à la blessure." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS081/document.
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En raison de leur implication potentielle dans la performance et la blessure, la compréhension des coordinations musculaires des ischio-jambiers représente aujourd’hui un enjeu en sciences du mouvement. Cependant, les méthodes actuelles basées sur la mesure de l’activation musculaire ou la modélisation musculo-squelettique ne permettent pas d’identifier les facteurs influençant les coordinations pour chaque individu. Explorer ces facteurs permettrait de mieux comprendre comment le système nerveux central explore et exploite l’ensemble des coordinations musculaires possibles afin d’adopter une solution permettant de réaliser la tâche demandée. Ce manuscrit a pour objectif de décrire les coordinations musculaires des ischio-jambiers à partir de données acquises in vivo. La partie expérimentale de ce travail s’articule autour de trois études qui ont exploré le couplage entre l’activation musculaire et les propriétés mécaniques des muscles. Ces travaux ont visé à comprendre les facteurs déterminants les coordinations de chaque individu, l’effet des coordinations musculaires de chaque individu sur leur performance et leur adaptation après une blessure musculaire.Les résultats de nos études montrent que les coordinations musculaires des ischio-jambiers varient substantiellement parmi les personnes actives et les athlètes de haut niveau. Nous avons montré que ces coordinations ne sont pas déterminées par les propriétés mécaniques de chaque muscle, i.e. le déséquilibre d’activation entre les ischio-jambiers n’est pas lié au déséquilibre de capacité de production de force. Ces coordinations apparaissent également plus ou moins avantageuses pour être performant dans une tâche d’endurance réalisée jusqu’à épuisement. Enfin, après la survenue d’une blessure, les coordinations musculaires diffèrent entre les jambes blessée et non blessée. Plus précisément, la contribution du muscle blessé au couple de force total est plus faible en comparaison du même muscle de la jambe opposée. Ces différences pourraient avoir des conséquences négatives à court-terme (pour la performance) et à long terme, pouvant hypothétiquement aller jusqu’à la récidive de la blessureThe understanding of hamstrings coordination is a trending topic in human movement science because of their potential involvement in both performance and injury. However, current experimental methods based on muscle activation recording or musculoskeletal modeling do not enable the identification of the factors that influencing muscle coordination for each individual. Addressing this issue is fundamental to understand how the central nervous system explores and exploits a set of many feasible coordination to adopt a good enough solution that enables producing a given motor task. This manuscript aims at describing hamstring coordination with in vivo data. The experimental part of this work is based on three studies that explored the coupling between muscle activation and the hamstrings mechanical properties. Also, this work aims at understanding the factors that influence muscle coordination of each individual, the effect of muscle coordination on their performance and their adaptation after a muscle injury.Our results show that hamstrings coordination varies substantially among active and elite athletes. We have shown that hamstrings coordination was not determined by the mechanical properties of each muscle, i.e. the imbalance of activation between hamstrings is not related to the imbalance of force production capacity. In addition, hamstrings coordination appears more or less advantageous in order to perform during a time to exhaustion task. Finally, muscle coordination differs between injured and uninjured legs, even after the completion of rehabilitation. Specifically, the injured muscle contributes in a lower extent to hamstring total torque in comparison with the same muscle of the opposite leg. These differences could have negative consequences in the short term (for performance) and in the long term, which could hypothetically increase the risk of reinjury
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Saunders, Gary. "An Infrastructure for Performance Measurement and Comparison of Information Retrieval Solutions." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2604.pdf.
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Maoret, Massimo. "Reunited: Exploring the effects of tie reactivation on newcomers' performance in interdependent organizations." Thesis, Boston College, 2013. http://hdl.handle.net/2345/bc-ir:104080.
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Thesis advisor: Candace JonesManagement scholars have rarely analyzed how prior social networks might help or hinder the job performance of new organizational members. However, internal and external job markets are increasingly characterized by high mobility of experienced professionals, who have extensive social networks rooted in their past collaborations and shared work experiences. Organizations rely more frequently on project teams and project-based organizing to perform interdependent tasks, so employees transition more often across project teams - and firms - in their boundary-less careers. These changes call for a better understanding of whether the reactivation of past social ties is likely to help or hinder the job performance of new employees, especially those engaged in highly interdependent tasks. The object of this study is to theorize and empirically test the mechanisms by which the reactivation of a particular social tie - shared work experience - may impact new members' performance. Using a social networks lens to study new members' organizational entries, this study not only contributes to the recent fast-growing literature on the reactivation of social ties, but also to studies on new members' performance, and has considerable relevance for enhancing an organization's performance through the better management of its expert workers' human and social capital
Thesis (PhD) — Boston College, 2013
Submitted to: Boston College. Carroll School of Management
Discipline: Management and Organization
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Skučas, Vytautas. "Vežimėlių krepšinio žaidėjų specialiųjų fizinių gebėjimų, aerobinio pajėgumo ir žaidimo rodiklių kaita amžiaus, žaidimo stažo ir negalios aspektais." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080618_125733-51581.
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Dėl diskusijos tarp tyrėjų ir dėl darbų trūkumo apie vežimėlių krepšinio specialiuosius fizinius gebėjimus, aerobinį pajėgumą ir žaidimo įgūdžius. Aktualūs ir reikšmingi moksliniai tyrimai analizuojantys šių rodiklių kaitą negalios sunkumo laipsnio, amžiaus, žaidimo stažo aspektais.
Tyrimo tikslas: nustatyti ir įvertinti vežimėlių krepšinio žaidėjų fizinių ypatybių, aerobinio pajėgumo ir žaidimo įgūdžių rodiklių kaitą pažeidimo laipsnio, amžiaus, žaidimo stažo aspektais.
Tyrimo uždaviniai:
1. Nustatyti ir įvertinti ve��imėlių krepšinio žaidėjų specialiųjų fizinių gebėjimų rodiklių priklausomybę nuo negalios sunkumo laipsnio, amžiaus, žaidimo stažo.
2. Nustatyti ir įvertinti kokią įtaką vežimėlių krepšinio žaidėjų žaidimo rodikliams turi negalios sunkumo laipsnis, amžius, žaidimo stažas.
3. Nustatyti ir įvertinti vežimėlių krepšinio žaidėjų aerobinio pajėgumo rodiklių priklausomybę nuo negalios sunkumo laipsnio, amžiaus, žaidimo stažo.
Specialiųjų fizinių gebėjimų ir žaidimo rodiklių testais buvo ištirti 42 vežimėlių krepšinio žaidėjai. Visi tiriamieji buvo suskirstyti i tris grupes pagal pažeidimo laipsnį, pagal amžių ir pagal žaidimo stažą.
Atliekant nenutrūkstamą nuosekliai didinamą fizinį krūvį rankų ergometru „Monark“, dujų analizatoriumi „Oxycon Mobile“ buvo ištirtas 21 vežimėlių krepšinio žaidėjas. Jie taip pat buvo suskirstyti i tris grupes pagal pažeidimo laipsnį, pagal amžių ir pagal žaidimo stažą. Buvo nustatyti fizinio darbingumo, kvėpavimo, dujų apykaitos... [toliau žr. visą tekstą]Because of discussion among researchers and shortage of research works in respect of special physical abilities, aerobic performance and playing skills of wheelchair basketball players. There are actual and relevant scientific research analyzing these problems in aspects of players age, disability and time playing wheelchair basketball. Aim of the research was to determine and evaluate special physical abilities, the aerobic performance and playing skills of weelchair basketball players according to playing experience, age and disability. Goals of research : 1. To determine and evaluate physical features of weelchair basketball players according to playing experience, age and disability. 2. To determine and evaluate playing skills of weelchair basketball players according to playing experience, age and disability. 3. To determine and evaluate the aerobic performance and of weelchair basketball players according to playing experience, age and disability. By methods of testing and pedagogical observation 42 wheelchair basketball players participating in wheelchair basketball competitions were under research. Participants of the research were divided into different groups according to their age, disability and time playing wheelchair basketball. The following wheelchair basketball players participating in the research according to the International wheelchair basketball classification system were divided: eight 1-1,5 point players, fifteen 2-2,5 points players, 8– 3-3,5... [to full text]
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Heesop, Kim. "A study of the influence of choice of record fields on retrieval performance." Thesis, Northumbria University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391752.
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Ligeikis, Linas, and Jonas Jurkus. "UAB "Mažeikių šilumos tinklai" veiklos ir perspektyvų ekonominis vertinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090909_091642-17626.
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Magistro darbe analizuojamas UAB ,,Mažeikių šilumos tinklai’’ (toliau tekste – įmonė) veiklos efektyvumas 2003 – 2007 metais, pateikiamas 2008 – 2010 metų perspektyvų vertinimas, įgalinantis priimti praktinį sprendimą gerinant įmonės finansinę padėtį (gamtinių dujų panaudojimas) bei užtikrinant veiklos stabilumą (įskaitant vartotojų nepertraukiamą aprūpinimą šilumos energija) – kogeneracinės jėgainės įdiegimą. Darbe pateikiamos įmonės ekonominių rodiklių (finansinio stabilumo, likvidumo, komercinės veiklos aktyvumo, rentabilumo ir kt.) reikšmės 2003 – 2007 metais ir laukiami rodikliai 2008 – 2010 metais. Patvirtinama autorių suformuluota mokslinio tyrimo hipotezė, kad kuro kainų didėjimo įtaka gali būti kompensuojama organizacinėmis – techninėmis priemonėmis, įgalinančiomis stabilizuoti sąnaudų ir tuo pačiu – šilumos energijos pardavimo kainos augimą. Pateikiami konkretūs pasiūlymai ir ekonominiai skaičiavimai. Metodika, kuria galės naudotis visos šilumos energiją gaminančios įmonės savo veiklos efektyvumo ekonominiam vertinimui, pateikta lentelės forma (MS Excel programos pagrindu), sudarys prielaidas formuoti finansinius koeficientus bei kitą informaciją apie įmonės veiklos efektyvumą. Lentelė pridedama CD laikmenoje.Master thesis analyzes UAB (PLLC) “Mažeikių šilumos tinklai” (further referred to as company) performance efficiency during the period of 2003 – 2007 year, presents an outlook assessment for the 2008 – 2010 period, enabling to make practical decisions in improving financial status of the company (utilization of natural rare gas) as well as ensuring performance stability (including continuous provision of heat energy to consumers) – instillation of cogeneration plants. The Paper presents the values of economic indicators (financial stability, liquidity, business activity, profitability, etc.) for the period of 2003 – 2007 year and the expected indicators for the 2008 – 2010 period. The research hypothesis, formulated by the authors - that the impact of the increasing fuel costs may be compensated by organizational – technical means, enabling to stabilize the increase of expenditure and, concurrently, selling price of heat energy - has been verified. Specific propositions as well as economic calculations are presented. The methodology, that could be used by all companies, producing heat energy, for the economic assessment of their performance efficiency, is presented in the form of a table (on the grounds of MS Excel program), into which a company should enter financial statement data and other information and the program shall deliver the financial ratios and other information concerning performance efficiency of the company. The table is enclosed in the form of a CD medium... [to full text]
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Bamat, David. "AComparison of Methods for Estimating State Subgroup Performance on the National Assessment of Educational Progress:." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109082.
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Thesis advisor: Henry BraunThe State NAEP program only reports the mean achievement estimate of a subgroup within a given state if it samples at least 62 students who identify with the subgroup. Since some subgroups of students constitute small proportions of certain states’ general student populations, these low-incidence groups of students are seldom sufficiently sampled to meet this rule-of-62 requirement. As a result, education researchers and policymakers are frequently left without a full understanding of how states are supporting the learning and achievement of different subgroups of students.Using grade 8 mathematics results in 2015, this dissertation addresses the problem by comparing the performance of three different techniques in predicting mean subgroup achievement on NAEP. The methodology involves simulating scenarios in which subgroup samples greater or equal to 62 are treated as not available for calculating mean achievement estimates. These techniques comprise an adaptation of Multivariate Imputation by Chained Equations (MICE), a common form of Small Area Estimation known as the Fay-Herriot model (FH), and a Cross-Survey analysis approach that emphasizes flexibility in model specification, referred to as Flexible Cross-Survey Analysis (FLEX CS) in this study. Data used for the prediction study include public-use state-level estimates of mean subgroup achievement on NAEP, restricted-use student-level achievement data on NAEP, public-use state-level administrative data from Education Week, the Common Core of Data, the U.S. Census Bureau, and public-use district-level achievement data in NAEP-referenced units from the Stanford Education Data Archive. To evaluate the accuracy of the techniques, a weighted measure of Mean Absolute Error and a coverage indicator quantify differences between predicted and target values. To evaluate whether a technique could be recommended for use in practice, accuracy measures for each technique are compared to benchmark values established as markers of successful prediction based on results from a simulation analysis with example NAEP data. Results indicate that both the FH and FLEX CS techniques may be suitable for use in practice and that the FH technique is particularly appealing. However, before definitive recommendations are made, the analyses from this dissertation should be conducted employing math achievement data from other years, as well as data from NAEP Reading
Thesis (PhD) — Boston College, 2021
Submitted to: Boston College. Lynch School of Education
Discipline: Educational Research, Measurement and Evaluation
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Hellowell, Mark Stephen. "Fair return for risk? : an examination of structure, competition and profitability in the market for private finance in the National Health Service." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/7895.
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Since 1993, the Private Finance Initiative (PFI) has been the dominant form of large-scale infrastructure procurement used by National Health Service (NHS) organisations in the United Kingdom. As of April 2011, 123 PFI projects for new hospital facilities had been agreed between NHS organisations and private sector consortia, representing privately financed investment of £15.9 billion (in 2010 prices), and a projected long-term cost to the NHS of £70.5 billion. Eight additional hospital PFI schemes were being procured or prepared for tender as of April 2011, with an estimated capital investment value of £2 billion. Despite the financial significance of PFI projects to the NHS, the literature has not assessed whether, or the extent to which, the returns expected by investors are excessive. This gap in the evidence base is highly problematic. The presence of excess returns to investors will have an impact on the cost efficiency and affordability of PFI projects, and consequently the financial sustainability of the NHS organisations that pay for them. This thesis evaluates the returns that investors in NHS-commissioned PFI projects expect to earn with reference to the scale of risk being borne by these investors, and explores the sources of the identified excess via an examination of the structure and competitiveness of the PFI financing markets. The study therefore comprises two substantial empirical components. The first draws on the financial models of 11 NHS PFI projects to describe and evaluate the return to investors. Cost of capital benchmarks, constructed on the basis of the Capital Asset Pricing Model, are used as comparators to assess the Internal Rate of Return (IRR) for the 11 projects, and as discount rates to calculate Benefit-Cost Ratios. Both measures agree on the presence of significant excess returns for investors on each project – with large “spreads” between the IRRs and the corresponding cost of capital benchmarks, and high Benefit-Cost Ratio scores. The second empirical component provides an analysis of the structure and competitiveness of the market for private finance. Two indicators of this market’s structure – concentration and entry/exit rates – in addition to the dynamics of the procurement process are the focus of measurement and evaluation. It is demonstrated that: (a) the market for private finance in this sector is an oligopoly, (b) market share is highly concentrated when assessed against UK regulatory standards, and (c) churn and market penetration rates are extremely low. Constraints on the competitiveness of the market are identified as: (i) the low number of bidders; and (ii) the extensive period of non-competitive bidding in the final phase of the procurement process, in which the output specifications of projects are materially altered. The thesis concludes that recent reforms to the procurement process have been ineffective, and the problems underpinning a lack of competitive pressure in procurement may be insuperable, given the inherent complexity of this form of investment and the need to secure external financing. For the NHS, this source of cost inefficiency implies substantial opportunity costs (i.e. foregone opportunities for additional capital investment) and excess costs (i.e. a higher than necessary burden on the revenue budget). A stronger regulatory regime, incorporating regulation of the profitability of PFI projects for investors, is required to minimise the threat posed by this policy to the financial sustainability of the NHS.
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Felekoglu, Oktay. "Propagation and performance analysis for a 915 MHz wireless IR image transfer system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FFelekoglu.pdf.
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Thesis (M.S. in Applied Physics)--Naval Postgraduate School, June 2005.Thesis Advisor(s): Richard M. Harkins, Gamani Karunasiri. Includes bibliographical references (p. 77-78). Also available online.
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Žiūraitė, Jurgita. "Vidinės organizacijos komunikacijos, darbuotojų motyvacijos ir darbo atlikimo ryšys." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080901_104559-83462.
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Komunikacija neabejotinai yra vienas iš sėkmingo organizacijos funkcionavimo veiksnių. Lietuvos kompanijose susidomėjimas vidine organizacijos komunikacija sparčiai auga. Daugelis organizacijų vadovų pajuto, kad efektyviai komunikuojanti organizacija gali pasiekti daugiau per trumpesnį laiką.
Šiame darbe siekta nustatyti vidinės organizacijos komunikacijos, motyvacijos ir darbo atlikimo sąsajų ypatumus bei pateikti jas atvaizduojantį modelį (subjektyviam ir objektyviam darbo atlikimui). Tyrime dalyvavo organizacijos privačiame sektoriuje tos pačios specialybės darbuotojai. Šimtas dvidešimt du tiriamieji užpildė internetinį klausimyno, kurį sudarė Pasitenkinimo komunikacija klausimynas (Communication Satisfaction Questionnaire), Darbo charakteristikų vertingumo klausimynas (Work Preference Inventory) vidinei ir išorinei motyvacijai nustatyti bei Prailginto Delft matavimo rinkinio (Extended Delft Measurement Kit) bendro darbo atlikimo subskalė, variantą. Taip pat buvo įtraukti demografiniai klausimai ir klausimas apie priedo prie atlyginimo dažnį.
Atlikus rezultatų analizę, nustatyta, kad pasitenkinimas grįžtamuoju ryšiu bei komunikacijos priemonių kokybe skiriasi pagal regionus, kuriuose dirba tiriamieji. Kuo ilgiau tiriamasis yra išdirbęs organizacijoje, tuo jo pasitenkinimas grįžtamuoju ryšiu, organizacijos perspektyva, komunikacijos klimatu ir komunikacijos priemonių kokybe mažesnis. Didesnis pasitenkinimas organizacijos integracija, organizacijos perspektyva bei... [toliau žr. visą tekstą]Communication is one of successful functioning organization‘s elements. In Lithuania interest in internal organizational communication increases rapidly. Many companies‘ managers comprehended that when communicating effectively, organization can achieve more during a shorter period of time. Current study aimed to determine internal organizational communication, motivation and performance relationships as well as present a model reflecting them (for subjective as well as objective performance indicator). Employees of the same job position in the same organization participated in the research. 122 employees filled in on-line questionnaire which included Communication Satisfaction Questionnaire, Work Preference Inventory to measure intrinsic and extrinsic motivation, Extended Delft Measurement Kit General Performance subscale. Demographic questions as well as the question about the amount of additions to a fixed salary during half a year period were included. After performing data analysis, the study found that satisfaction with personal feedback and media quality differs in groups according to regions to which employees belong according to their working place. The longer study participant has worked in the company; the lower is his/her satisfaction with personal feedback, organizational perspective, communication climate and media quality. The higher is employee’s satisfaction with organizational integration, organizational perspective and media quality, the better he/she tends... [to full text]
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Giedraitienė, Aistė. "Pirminės sveikatos priežiūros įstaigų veiklos vertinimo sistemos analizė ir tobulinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060613_140223-27892.
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Aim of the paper: to analyze performance peculiarities of primary health care organizations (PHCO) and to propose possible ways for improvement.
Methods: the analysis of scientific literature of Lithuanian and foreign authors, analysis of legal regulating documents, analysis of the results of the questionnaire of managers of PHCO, analysis of the results of the interview with experts.
The object of research: performance assessment of primary health care organizations.
Results: PHCO quality assessment and assessment performed by administrative organizations are the most often types of PHCO assessment in Lithuania. The results of the research show that data evaluating PHCO performance are fragmented and reflect only certain areas of PHCO activities. The quantity of the data does not correspond to the needs of PHCP managers in the strategic planning and implementation process. The assessment of PHCO performance is not dynamic and adjusted to the changing environment conditions. Experts unanimously pointed the need for the development of present PHCO performance assessment system and the need for its unification.
Conclusions and practical recommendations:
1. Having done the analysis of scientific literature, we may conclude that problems of performance assessment are most often analyzed in business than in public sectors. The complex view to organization activities allows to analyze not only results of the organization, quality of performance but also to identify areas for... [to full text]
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Schnorr, Carla. "Desempenho de municípios gaúchos: uma análise pré e pós promulgação da lei de responsabilidade fiscal - IRF." Universidade do Vale do Rio dos Sinos, 2012. http://www.repositorio.jesuita.org.br/handle/UNISINOS/3375.
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O estudo teve por objetivo identificar o desempenho de municípios gaúchos pré e pós promulgação da LRF. Em decorrência do desregramento da gestão dos recursos públicos municipais, a instituição da LRF teve o intuito de disciplinar as finanças públicas e garantir o equilíbrio fiscal. Trata-se de uma pesquisa descritiva, com abordagem quali-quantitativa, realizada no período entre 1997-1999 e 2008-2010. Para a obtenção dos dados, foi utilizada a técnica de levantamento de dados documental, por meio de relatórios FINBRA publicados no site da STN, nos 429 municípios que compuseram a amostra da pesquisa. Buscou-se nesses documentos dados referentes às métricas estabelecidas pela LRF: despesa com pessoal, dívida consolidada líquida, operações de crédito, serviços da dívida e garantias. Os dados coletados foram submetidos ao tratamento e análise da técnica de diferença de média. Com base na análise pode-se constatar que o desempenho com a vigência da LRF foi favorável quanto à redução da média geral nas variáveis referentes à despesa com pessoal, dívida consolidada líquida e serviços da dívida; e desfavorável nas operações de créditos e concessão de garantias. Relativo ao cumprimento dos limites legais fixados pela legislação, o desempenho foi positivo nas métricas despesa com pessoal, operações de crédito e serviços da dívida, já que o número de municípios em desacordo à LRF reduziu, enquanto que a dívida consolidada líquida e a concessão de garantias apresentaram desempenho negativo, visto que houve aumento no número de municípios que infringiram a lei. Os resultados permitem concluir que o advento da LRF contribuiu para melhorar o desempenho dos municípios gaúchos.
The study had the purpose of identify the performance of gauchos cities before and after LRFs promulgation. Because of the uncontrolled management of municipal public resources, LRFs institution had the intention of disciplining public finances and ensure the fiscal balance. This is a descriptive research, with qualitative and quantitative approach, carried out between 1997-1999 and 2008-2010. To obtain the data, the documentary data collection technique was employed, through FINBRA reports published in the STN website, in the 429 cities that formed the research sample. It was searched in these documents data that take into account the metrics established by LRF: personnel expenditure, consolidated net debt, credit transactions, debt service and guarantees. The collected data was submitted to treatment and analysis of the mean difference technique. Based on the analysis it is possible to determine that the performance with LRF was favorable in the decrease of the variables overall averages from personnel expenditure, consolidated net debt and debt service; and unfavorable in credit transactions and granting guarantees. Relative to the accomplishment of the legal limits fixed by the law, the performance was positive in the personnel expenditure, credit transactions and debt service metrics, since the amount of cities at odds with LRF reduced, while the consolidated net debt and granting guarantees presented a negative performance, considering that there was an increase in the number of cities that broke the law. The results allow one to conclude that the LRFs advent contributed to improve the performance of the gauchos cities.
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Zheng, Xiang. "Three Essays in Fintech and Corporate Finance:." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109077.
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Thesis advisor: Thomas ChemmanurMy Ph.D. dissertation consists of three essays. The first essay studies the economic consequence of the current patent screening process on firm performance using a machine-learning approach. Using USPTO patent application data, I apply a machine-learning algorithm to analyze how the current patent examination process in the U.S. can be improved in terms of granting higher quality patents. I make use of the quasi-random assignment of patent applications to examiners to show that screening decisions aided by a machine learning algorithm lead to a 15.5% gain in patent generality. To analyze the economic consequences of current patent screening on both public and private firms, I construct an ex-ante measure of past false acceptance rate for each examiner by exploiting the disagreement in patent screening decisions between the algorithm and current patent examiner. I first show that patents granted by examiners with higher false acceptance rates have lower announcement returns around patent grant news. Moreover, these patents are more likely to expire early. Next, I find that public firms whose patents are granted by such examiners are more likely to get sued in patent litigation cases. Consequently, these firms cut R&D investments and have worse operating performance. Lastly, I find that private firms whose patents are granted by such examiners are less likely to exit successfully by an IPO or an M&A. Overall, this study suggests that the social and economic cost of an inefficient patent screening system is large and can be mitigated with the help of a machine learning algorithm. The second essay studies how investor attention affects various aspects of SEOs. Models of seasoned equity offerings (SEOs) such as Myers and Majluf (1984) assume that all investors in the economy pay immediate attention to SEO announcements and the pricing of SEOs. In this paper, we analyze, theoretically and empirically, the implications of only a fraction of investors in the equity market paying immediate attention to SEO announcements. We first show theoretically that, in the above setting, the announcement effect of an SEO will be positively related to the fraction of investors paying attention to the announcement and that there will be a post-announcement stock-return drift that is negatively related to investor attention. In the second part of the paper, we test the above predictions using the media coverage of firms announcing SEOs as our main proxy for investor attention, and find evidence consistent with the above predictions. In the third part of the paper, we develop and test various hypotheses relating investor attention paid to an issuing firm to various SEO characteristics. We empirically show that institutional investor participation in SEOs, the post-SEO equity market valuation of firms, SEO underpricing, and SEO valuation are all positively related to investor attention. Lastly, we also use the number of SEC EDGAR file downloads as an alternative proxy for investor attention, and our findings are robust to this alternative investor attention measure. The results of our identification tests show that the above results are causal. The third essay studies how the location of a lead underwriter in its network of investment banks affects various aspects of seasoned equity offerings (SEOs). We hypothesize that investment banking networks perform an important economic role in the SEO underwriting process for SEOs, namely, that of information dissemination, where the lead underwriter uses its investment banking network to disseminate information about the SEO firm to institutional investors. Consistent with the above information dissemination role, we show that firms whose SEOs are underwritten by more central lead underwriters are associated with a smaller extent of information asymmetry in the equity market. We then develop testable hypotheses based on the information dissemination role of underwriter networks for the relationship between SEO underwriter centrality and various SEO characteristics, which we test in our empirical analysis. Consistent with the above hypotheses, we find that more central lead SEO underwriters are associated with less negative SEO announcement effects; smaller SEO offer price revisions; smaller SEO discounts and underpricing; higher immediate post-SEO equity valuations for issuing firms; and greater post-SEO long-run stock returns for issuing firms. We also find that SEOs with more central lead underwriters are associated with greater institutional investor participation. Our instrumental variable (IV) analysis using the industry-average bargaining power of underwriters relative to issuers as the instrument shows that the above results are causal. Consistent with greater value creation by more central lead underwriters, we find that more central lead underwriters receive greater compensation
Thesis (PhD) — Boston College, 2021
Submitted to: Boston College. Carroll School of Management
Discipline: Finance
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Kareiva, Mantas. "Skaičiavimų, panaudojant duomenų kubus, organizavimas ir tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080710_142632-53803.
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Duomenų kubo konstravimas yra laikui ir kompiuteriniams resursams imlus procesas. Nepaisant to, šis darbas turi būti atliktas norint pasinaudoti greitų užklausų iš ypatingai didelių OLAP kubų teikiamais privalumais . Telekomunikacijų bendrovės surenka didelius duomenų kiekius apie įvykius telekomunikaciniuose tinkluose. Kiekviena duomenų porcija aprašo daug informacijos (pavyzdžiui: paslaugos tipą, iniciatorių, gavėją, pradžios laiką, trukmę, perduotų duomenų kiekį, skambučio kryptį, kainą, tinklo sąsajos adresą ir t.t.). Mobiliojo ryšio rinkoje yra įprasta apdovanoti kiekvieną abonentą tam tikru prizu (pinigais, nuolaidomis ar nauju mobiliuoju telefonu) mainais į 24 mėnesių sutartį naudotis konkretaus operatoriaus paslaugomis. Taigi kas 24 mėnesius abonentas turi galimybę pakeisti paslaugos teikėją. Tam, kad ryšio operatorius išlaikytų savo klientus, už sutarties pratęsimą taip pat turi pasiūlyti dovaną. Kad būtų galima tai atlikti nepatiriant finansinių nuostolių – mobiliojo ryšio operatorius privalo žinoti kiekvieno abonento naudojimosi paslaugomis statistiką. Šiame dokumente aprašoma pora būtų kaip pakeisti duomenų pirminį vaizdą (struktūrą ir sudėtį) siekiant pagreitinti duomenų kubų konstravimo procesą. Vienas šių metodų – duomenų agregavimas iki didžiausio, vis dar tinkamo analizei, lygio. Kitas metodas – tai lėtai kintančių kubo dimensijų sintezavimas taip sumažinant kubo dydį ir pagreitinant jo kūrimą.Data cube pre computing is time and computer resources consuming task. In spite of this it needs to be done in order to construct an OLAP cube to take advantage of fast querying in data sets enormous in its sizes. Telecommunication industries collect huge amount of data about events in its networks. Every data portion holds a lot of information (i.e. service type, originator, receiver, time for start, duration, data volume, calling direction, cost, network interface address, etc.). In mobile telecommunication industries it is common to award each customer / subscriber by some prize (money, cell phone, discount to services and so on) in return of 24 month obligation to use one’s services. So, every 24 months subscriber gains ability to choose another telecommunication network. In order to maintain stable amount of subscribers’ service provider must offer something in return. In order to do that correctly, without financial loses, one must know exact usage statistics of each subscriber. This paper covers couple tips to arrange data in data warehouses (data marts) in order to achieve greater data cube pre processing speed. One of these methods covers partial data aggregation to highest degree, still sufficient to answer specific queries. Another method shows the ability to synthesize data cube dimensions in order to lower data volumes, that data cube pre calculation could take less time.
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Goksin, Celalettin. "Evaluation of tactical decision aid programs for prediction of field performance of IR sensors." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA383398.
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Thesis (M.S. in Systems Engineering) Naval Postgraduate School, Sept. 2000."September 2000." Thesis advisor(s): Cooper, Alfred W.; Goroch, Andreas K. Includes bibliographical references (p. 145-148). Also available online.
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Adomaitytė, Alma. "Veiklos vertinimo sistema Lietuvos viešojo administravimo institucijose ir įstaigose." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110705_133322-37764.
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Darbuotojų veiklos vertinimas yra svarbi tiek viešojo administravimo, tiek privačios organizacijos vadybos sritis, skatinanti organizaciją ir jos žmogiškuosius išteklius tobulinti veiklą, didinti produktyvumą, bei suteikti darbuotojams grįžtamąjį ryšį.
Darbe keliami šie probleminiai klausimai: kokie pagrindiniai Lietuvos viešojo administravimo darbuotojų vertinimo sistemos teoriniai ir praktinio įgyvendinimo privalumai ir trūkumai? kokia žmogiškojo faktoriaus įtaka tobulinant viešojo administravimo darbuotojų veiklos vertinimo sistemą? Tyrimo objektu laikomas darbuotojų veiklos vertinimas Lietuvos viešojo administravimo institucijose ir įstaigose. Veiklos vertinimas darbe analizuojamas kaip procesas, kuriuo vertinama individuali darbuotojo veikla, ne organizacijos visuminė veikla. Tyrimo tikslas – išanalizuoti Lietuvos viešojo administravimo institucijose ir įstaigose egzistuojančią veiklos vertinimo sistemą, nustatyti jos atitiktį teoriniams veiklos vertinimo modeliams ir išryškinti vertinimo sistemos teorinio pagrindo bei praktinio jo taikymo santykį bei tobulinimo perspektyvas. Šiam tikslui pasiekti darbe keliami šie uždaviniai:
1. Išanalizuoti ir apibendrinti teorinius veiklos vertinimo modelius, išryškinti veiklos vertinimo sistemos sudedamąsias dalis.
2. Išanalizuoti Lietuvos viešojo administravimo institucijų ir įstaigų darbuotojų veiklos vertinimą reglamentuojančius teisės aktus, išryškinti jų teorinius privalumus ir trūkumus.
3. Nustatyti Lietuvos viešojo... [toliau žr. visą tekstą]Personnel performance appraisal is a substantial area of both public administration and private organization management. It encourages an organization and human resources of organization to improve its activity, enhance productivity and provide a feedback for personnel. This work contains of further problematic questions: what are advantages and disadvantages of academic performance appraisal system and practical implementation of Lithuanian public administration? What is the impact of human factor for the improvement of public administration staff performance appraisal system? The object of research is a performance appraisal off staff in institutions and agencies of Lithuanian public administration. In this work appraisal of activity is analysed as a process by which individual employee activity, but not entirety of organization activity is assessed. The purpose of research – to analyse the existing activity performance appraisal system of Lithuanian public administration in institutions and agencies, to identify this system coincidence to academic models of performance appraisal and highlight the relation between academic basis of activity assessment and practical adaptation and improvement perspectives. For this purpose the main tasks are set: 1. To analyse and summarize academic models of performance appraisal, to highlight the main components of performance appraisal system. 2. To analyse the legislation that regulates personnel performance appraisal in institutions... [to full text]
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Dumurgier, Julien. "Conséquences et déterminants du déclin moteur chez le sujet âgé : analyses transversales et longitudinales dans la cohorte des 3 Cités." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00635892.
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Le déclin des performances motrices du sujet âgé est associé à un risque accru de morbimortalitéet représente une problématique majeure pour nos sociétés vieillissantes. Son origine est le plus souvent multifactorielle et nous nous sommes plus particulièrement intéressés au rôle des facteurs de risque vasculaire à partir des données longitudinales et transversales de la cohorte dijonnaise de l'étude des 3 Cités. Les performances motrices ont été évaluées à travers la mesure de la vitesse de marche sur 6 mètres chez des sujets âgés de 65 à 85 ans à l'inclusiondans l'étude.Nous avons ainsi observé que l'hypertension artérielle à l'inclusion dans l'étude était associée à une vitesse de marche plus lente et à un déclin de la vitesse de marche plus important au cours du suivi. Parmi les participants ayant eu une IRM cérébrale à l'inclusion, nous avons observé une relation entre la vitesse de marche et les volumes sous-corticaux de substance grise cérébrale, en particulier le volume du noyau caudé. Une vitesse de marche plus lente à l'inclusion était associée à un risque accru de mortalité toutes causes 5 ans plus tard, avec une association plus forte pour la mortalité cardiovasculaire.Ces résultats sont en faveur d'une contribution cérébrovasculaire au déclin des fonctions motrices du sujet âgé, et participent à une meilleure compréhension de ce processus.
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Mažeikaitė, Ingrida. "Fenolinių rūgščių ir fenilpropanoidų nustatymas propolyje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080616_100330-71888.
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Fenolinės rūgštys ir fenilpropanoidai pasižymi reikšmingu biologiniu aktyvumu ir yra vaistinių žaliavų veiklieji komponentai. Įteisintų tyrimo metodikų vystymas šių junginių nustatymui (kokybiniam ir kiekybiniam žaliavų tyrimui) yra ypač svarbus augalinių vaistinių preparatų efektyvumo, saugumo ir kokybės kontrolei. Iš skirtingų Lietuvos regionų buvo surinkta 18 propolio pavyzdžių. Atlikto darbo tikslas - analitiniais metodais ištirti Lietuvoje surinktų propolio pavyzdžių cheminę sudėtį, bei kiekybiškai ir kokybiškai įvertinti šias fenolines rūgštis ir fenilpropanoidus: chlorogeno rūgštį, cinamono rūgštį, galo rūgštį, ferulo rūgštį, kavos rūgštį, kumaro rūgštį, protokatecho (3,4-dihidroksibenzoinę) rūgštį, rozmarino rūgštį, vaniliną ir vanilino rūgštį. Atlikti tyrimai paprastos ir greitos atvirkštinių fazių efektyviosios skysčių chromatografijos metodikos optimizavimui ir įtiesinimui. Sukurto crhromatografinio metodo judrioji skystoji fazė yra metanolis ir 0,5 procento acto rūgšties tirpalas vandenyje. Esant optimalioms atskyrimo sąlygoms (aprašytoms skyriuje „Tyrimo metodas“), analizė atliekama 27 min., sulaikymo laikas 4,04 min (galo rūgštis), 6,93 min (protokatecho rūgštis), 11,30 min (chlorogeno rūgštis), 12,26 min (vanilinė rūgštis), 12,93 min (kavos rūgštis), 13,80 min (vanilinas), 16,97 min (kumaro rūgštis), 17,95 min (ferulo rūgštis), 22,29 min (rozmarino rūgštis) ir 26,30 min (cinamono rūgštis). Aptikimo riba ir nustatymo riba buvo atitinkamai tarp 0,004–0,021 ir 0,0... [toliau žr. visą tekstą]The phenolic acids and phenylpropanoids have an important biological activity and are therapeutic agents of crude drugs. Development of validated analysis techniques of these phytotherapeutic agents (fingerprinting and assay procedures) is an important practice for efficacy, safety and quality control of herbal drug preparations. 18 samples of propolis were collected from different districts of Lithuania. The aim of the present work was to study chemical composition of collected samples and estimate analytical capabilities of the evaluation of selected phenolic acids and phenylpropanoids: caffeic acid, chlorogenic acid, cinnamic acid, coumaric acid, ferulic acid, gallic acid, protocatechuic (3,4-dihydroxybenzoic) acid, rosmarinic acid, vanillic acid and vanillin. Optimization and validation procedures of rapid and simple method of reversed phase high performance liquid chromatography were carried out. The mobile phase of the optimized chromatographic method consisted of methanol and 0.5 per cent acetic acid solvent in water. Under the optimal separation conditions (described in Methods), analysis was done in 27 min, with the retention times 4.04 min (gallic acid), 6.93 min (protocatechuic acid), 11.30 min (chlorogenic acid), 12.26 min (vanillic acid), 12.93 min (caffeic acid), 13.80 min (vanillin), 16.97 min (coumaric acid), 17.95 min (ferulic acid), 22.29 min (rosmarinic acid) and 26.30 min (cinnamic acid). The limits of detection and the limits of quantitation were between... [to full text]
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Ayoub, Anas. "Sources laser ultrarapides performantes dans le moyen IR et le Tz." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR044.
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La sonde atomique tomographique est un instrument d’analyse de la matière à trois dimensions avec une résolution atomique. Cet instrument s’appuie sur l’effet de champ électrique généré à l’extrémité d’un échantillon taillé sous la forme d’une aiguille nanométrique pour faire évaporer les atomes de surface qui sont collectés par un détecteur à deux dimensions. La mesure du temps de vol des ions dont l’évaporation est déclenchée par une impulsion électrique ou optique permettent de remonter à la composition chimique en plus de la localisation 3D des atomes. Dans les sondes atomiques actuelles, l’évaporation atomique est déclenchée par un laser ultrarapide émettant dans l’UV. Cependant, l’interaction de la lumière UV avec la matière induit un échauffement thermique qui limite la résolution en masse de l’instrument et empêche son exploitation pour l’analyse de matériaux fragiles comme les composants biocompatibles. Ces travaux de thèse visent à étudier des solutions pour favoriser l’évaporation rapide tout en inhibant les effets thermiques indésirables dans le cadre d’une sonde atomique laser. Notre approche consiste à exploiter des impulsions ultracourtes dans le domaine du moyen infrarouge ou du THz en raison de leur grande énergie pondéromotrice associée à une faible énergie de photon. Ce manuscrit rapporte sur le développementd’un banc de génération et caractérisation d’impulsions THz intenses. Le couplage de ces rayonnements avec une nano-pointe métallique polarisée négativement a permis de caractériser le champ proche induit à la surface de la nano-pointe qui est fortement modifié par l’effet d’antenne de cette dernière. La deuxième partie rapporte sur le développement d’une source laser ultrarapide de haute cadence accordable dans le moyen infrarouge autour de 3 mm en exploitant des fibres en verre fluoréThe atome probe tomography is an instrument for analyzing matter in three dimensions with atomic resolution. This instrument relies on the effect of an electric field generated at the end of a sample cut into the shape of a nanoscale needle to evaporate the surface atoms which are collected by a two-dimensional detector. The measurement of the time of flight of the ions whose evaporation is triggered by an electrical or optical pulse makes it possible to measure the chemical composition in addition to the 3D localization of the atoms. In current atome probes, atomic evaporation is triggered by a high-speed laser emitting in the UV. However, the interaction of UV light with matter induces thermal heating which limits the mass resolution of the instrument and prevents its use for the analysis of fragile materials such as biocompatible components. This thesis work aims to study solutions to promote rapid evaporation while inhibiting unwanted thermal effects of the laser in atome probe. Our approach consists in exploiting ultrashort pulses in the mid-infrared or THz domain due to their high ponderomotive energy associated with low photon energy. This manuscript reports on the development of a bench for the generation and characterization of intense THz pulses. Coupling these radiations with a negatively polarized metallic nanotip has made it possible to characterize the near field induced at the surface of the nanotip, which is strongly modified by the antenna effect. The second part reports on the development of an ultra-fast laser source tunable in the mid-infrared around 3 mm using fluoride glass fibers
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Tamošiūnaitė, Nida. "Skirtingo meistriškumo krepšininkų savosios vertės jausmo ir sociometrinio statuso sąsaja." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050520_142643-30280.
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It was noticed that self-appreciation and sociometric status of basketball players influence not just sporting results and achievements but also relations with team members, other people, as well as athletes’ self-criticism, requirements for themselves, viewpoint towards achievements and rots, their status in the team and a sense of self-value. That prompted to perform an empiric research confirming or denying coherence of self-value sense and sociometric status in the group. On that base we have analysed self appreciation of various performance basketball players (n=38) and sociometric statuses. Results show that majority of various performance athletes estimate themselves adequately. Estimate means of sociometric statuses of various performance teams do not differ statistically neither in sport nor in leisure activity. Thus it is not possible to state that there is a direct coherence between self-appreciation sense of various performance basketball players and sociometric status.
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Uhl, Elizabeth. ""Work Hard and Be Kind”: How a Sports Team’s Shared Values Promote Social Movement Engagement." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109149.
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Thesis advisor: Lyndon GarrettCoinciding with the upsurgence of the Black Lives Matter Movement in the Summer of 2020, collegiate and professional sports teams have exhibited increased involvement in social issues. Existing research primarily analyzes the platform and visibility that athletes have to promote social agendas, but there is a gap in knowledge regarding how a sports team forms a collective identity around a social movement. This study seeks to fill this gap in research by utilizing qualitative surveying and interviewing to examine how Boston College athletes engage in the Black Lives Matter Movement. Processes of grounded theory and inductive analysis are used to understand how the Boston College Women’s Rowing Team values contribute to the team’s shared mental model to fulfill the conditions of social movement emergence and further promote team value adoption and team success. Evaluation of student-athletes across different Boston College teams through this study also offers insights to the controversy over sports teams engaging in social issues
Thesis (BA) — Boston College, 2021
Submitted to: Boston College. College of Arts and Sciences
Discipline: Departmental Honors
Discipline: Sociology