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1
Панфілов, Юрій Іванович. "Психологічні основи забезпечення ефективності спільної діяльності операторів військ протиповітряної оборони". Thesis, Українська інженерно-педагогічна академія, 2007. http://repository.kpi.kharkov.ua/handle/KhPI-Press/18362.
Повний текст джерелаАнотація:
Дисертація на здобуття наукового ступеня кандидата психологічних наук за фахом 19.00.03 – психологія праці, інженерна психологія. – Українська інженерно-педагогічна академія, Харків, 2007.
Дисертація присвячена проблемі психологічного забезпечення ефективності спільної діяльності операторів з урахуванням психологічної сумісності. В дисертації проаналізовані основні науково-теоретичні підходи до визначення взаємозв’язку ефективності спільної діяльності і сформованої психологічної сумісності, які включали: структурний, функціональний і адаптивний підходи. Більш конкретно визначена структура психологічної сумісності та її значущі компоненти. В роботі аналізується діяльність операторів військ Протиповітряної оборони, які виконують завдання бойового чергування, представлена професіограма спеціальностей радіотехнічного та зенітно-ракетного профілю, в яких відображені психологічні вимоги до цих спеціальностей та встановлені професійно важливі якості операторів, сформованість яких дозволяє підвищити ефективність їхньої спільної діяльності. Визначені і згруповані внутрішні і зовнішні фактори, які впливають на ефективність спільної діяльності. В ході дослідження встановлено комплекс критеріїв кожного компонента психологічної сумісності, їх рівні, динаміка та умови формування. Визначені основні причини психологічної несумісності. Суб'єктам керівництва військових підрозділів розроблена і запропонована методика психологічного забезпечення ефективності спільної діяльності з урахуванням психологічної сумісності операторів.Dissertation on the scientific degree of candidate of psychological sciences on speciality 19.00.03 – рsychology of labour, engineering psychology. – Ukrainian еngineering-рedagogical аcademy, Kharkov, 2007. Dissertation is devoted to the problem of the socially-psychological providing of the efficiency of the joint activity of operators taking into account psychological compatibility. In dissertation found out basic theoretical-conceptual approaches to the study of intercommunication of the joint activity and the problem of psychological compatibility, which include: structural, functional and adaptive approaches. The structure of psychological compatibility and its copulas with the effective joint activity is specified. Description of the activity of operators of Air defense troops, which execute the commons tasks, is given in the work, represented psychodrama requirements to necessary qualities of operators, purposeful influence on which allows to promote efficiency of their joint activity. The stress - factors, which influence on efficiency of joint activity are definite is grouped. They are separated into external and internal (psychological and socially-psychological). During the research certain meaningful components of psychological compatibility, their criteria levels and forming dynamics. Certain principal reasons of psychological incompatibility. As a result of the conducted research to the subjects of guidance of military subsections the special psychological methodic providing of the efficiency of joint activity taking into account psychological compatibility of operators was offered.
2
Gräfenhain, Maria. "Young children's understanding of joint activity." Leipzig Leipziger Univ.-Verl, 2008. http://d-nb.info/998767239/04.
Повний текст джерела
3
Schmidt, A. "Activity limitation in joint hypermobility syndrome." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1445049/.
Повний текст джерелаАнотація:
This review examines the role of fear and avoidance in chronic pain, focusing in particular on their role in activity limitation. It examines the existing fear-avoidance models, in particular Vlaeyen and Linton's (2000) model, it reviews the evidence for this model, and considers it in the context of models of fear and avoidance in other psychological disorders. Evidence is reviewed for other factors which contribute to activity limitation in chronic pain. In the context of this evidence, it is concluded that whilst there is much support for Vlaeyen and Linton's model, it may be useful to consider alternative models describing the process of activity limitation, and future research is proposed to support this.
4
Palmer, Gwen. "Modelling neuronal activity at the knee joint." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/363112/.
Повний текст джерелаАнотація:
The knee is a complex joint, prone to instability and damage, meaning a complicated architecture of soft tissues is necessary to ensure any stability of the joint. These structures are innervated, and play an important role in both proprioception, the sensing of a body’s own limb positions, and nociception, the sensing of painful stimuli. The purpose of this project has been to develop a computational model that can replicate the behaviour of the mechanical sensing nerve endings in the knee joint. An adapted Hodgkin-Huxley model has been developed and used to simulate the behaviour of the nerve endings. These models have been coupled with a three dimensional finite element model of a feline knee joint, which has been built with use of x-ray CT and MRI scans of a cat’s hind limb, allowing neural responses to be predicted as the position of the knee joint changes. Once the behaviour of the complete model has been verified, through comparisons with recordings of neural responses in the literature, it was possible to observe the effect of removing a soft tissue structure on the neural response. The anterior cruciate ligament (ACL) was removed from the model, and a series of tests run to determine the effect of ligament damage on neural response. It was predicted that removing the ACL from the knee joint can increase the neural responses to changes in knee position, agreeing with data in the literature. This could indicate an increase in pain at the joint, and could help with understanding the causes of pain and changes proprioception experienced by patients with damaged ACL.
5
Lucero, Stephanie Suzanne. "Increasing reading comprehension through mediated joint activity." CSUSB ScholarWorks, 1999. https://scholarworks.lib.csusb.edu/etd-project/1941.
Повний текст джерела
6
Bader, Joseph Scott. "DISTAL RADIOULNAR JOINT BIOMECHANICS AND FOREARM MUSCLE ACTIVITY." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/825.
Повний текст джерелаАнотація:
Optimal management of fractures, post-traumatic arthritis and instability of the distal radioulnar joint (DRUJ) requires an understanding of the forces existing across this joint as a function of the activities of daily living. However, such knowledge is currently incomplete. The goal of this research was to quantify the loads that occur at the DRUJ during forearm rotation and to determine the effect that individual muscles have on those loads.
Human and cadaver studies were used to analyze the shear (A-P), transverse (M-L) and resultant forces at the DRUJ and to determine the role that 15 individual muscles had on those forces. Data for scaling the muscles forces came from EMG analysis measuring muscle activity at nine positions of forearm rotation in volunteers during isometric pronation and supination. Muscle orientations were determined from the marked muscle origin and insertion locations of nine cadaveric arms at various stages of forearm rotation. The roles that individual muscles played in DRUJ loading were analyzed by removing the muscle of interest from the analysis and comparing the results.
The EMG portion of this study found that the pronator quadratus, pronator teres, brachioradialis, flexor carpi radialis and palmaris longus contribute significantly to forearm pronation. The supinator, biceps brachii, and abductor pollicis longus were found to contribute significantly to supination.
The results of the DRUJ analysis affirm that large transverse forces pass from the radius to the ulnar head at all positions of forearm rotation during pronation and supination (57.5N-181.4N). Shear forces exist at the DRUJ that act to pull the radius away from the ulna in the AP direction and are large enough to merit consideration when examining potential treatment options (7.9N-99.5N).
Individual muscle analysis found that the extensor carpi radialis brevis, extensor pollicis longus, extensor carpi ulnaris, extensor indicis and palmaris longus had minimal effect on DRUJ loading. Other than the primary forearm rotators (pronator quadratus, pronator teres, supinator, biceps brachii), the muscles that exhibited the largest influence on DRUJ loading were the abductor pollicis longus, brachialis, brachioradialis, extensor carpi ulnaris, flexor carpi radialis, and flexor carpi ulnaris.
7
Chen, Shiming. "Dimensions of international joint venture activity : the case of Taiwanese joint ventures in mainland China." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396573.
Повний текст джерела
8
Sherstobitova, T. I. "An innovation as a result of joint creative activity." Thesis, ТОВ Друкарський дім "Папірус", 2012. http://essuir.sumdu.edu.ua/handle/123456789/29136.
Повний текст джерела
9
Gumbrecht, Michelle. "Initiating a joint activity : an examination of communication media selection /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Повний текст джерела
10
Boateng, Agyenim. "Dimensions of international joint venture activity in Ghana and Nigeria." Thesis, University of Leeds, 2000. http://etheses.whiterose.ac.uk/2344/.
Повний текст джерелаАнотація:
This study investigates four key dimensions o f international joint venture (JV) activity in Ghana and Nigeria: strategic motives, host country location factors, finance and performance. These dimensions are explored in a multi-method empirical study. Drawing on official annual aggregate and project level data, the trends and patterns of FDI in Ghana and Nigeria are examined across several characteristics, trends over time, ownership type of FDI, origin of foreign investor, geographical location of projects and distribution by sector. The result shows that the more preferred mode of entry for FDI is through the equity joint venture. Primary data was collected by means of a self-administered questionnaire survey from a cross section sample of 57 JVs in Ghana and Nigeria, with partners from Western Europe, North America and Asia/Pacific. First, the relative importance of a set of strategic motives and host country location factors influencing foreign investors’ decisions to form JVs in Ghana and Nigeria are identified. The main strategic motives of the foreign partners are to overcome government-mandated barriers, risk and cost sharing and to facilitate international expansion. The study finds government policy towards foreign investors, political stability and market size as the main location factors. Exploratory factor analysis is employed to identify the underlying dimensions of strategic motives and host country location factors for the JVs. Hypotheses are then tested (using t-test or Anova) by considering strategic motives and host country factors in terms of the characteristics of the sample. Second, the manner in which JVs are financed, the relative importance of barriers to JV investment finance and the determinants of the financial structure of JVs in Ghana and Nigeria are examined. Hypotheses are tested using contingency table analysis and t-test on the relative effects of the barriers and the factors influencing the capital structure of JVs. Finally, measures and determinants of performance are examined. A multiple regression analysis is conducted to identify the main predictors of successful performance for JVs in Ghana and Nigeria. The study identifies capital adequacy, partners’ capabilities and congruity of motives and goals of the partners as important determinants of performance. A paired sample t-test was also conducted to compare the performance of JVs with host government partners and those with private sector partners, the results indicate that JVs with private sector partners are perceived to perform better.
11
Birrell, Carole. "Efficiency gains for seasonal adjustment by joint modelling of disaggregated series." School of Mathematics and Applied Statistics - Faculty of Informatics, 2008. http://ro.uow.edu.au/theses/131.
Повний текст джерелаАнотація:
Governments and businesses use data collected over time as indicators of the social, economic and business conditions of the country. These may then be used for policy and planning decisions, calculation of national accounts and monitoring of economic activity. The production and publication of seasonally adjusted series, in addition to unadjusted figures, is standard practice for government statistical agencies. In general, there are two main approaches to seasonal adjustment, namely a filter-based approach and a model-based approach. Filter-based methods estimate time series components, such as the trend and seasonal factors, by application of a set of filters to the original series. Model-based methods of seasonal adjustment are more specific to each series, and are thereby more flexible.Time series resulting from aggregation of several sub-series can be seasonally adjusted directly or indirectly. With model-based seasonal adjustment, the sub-series may also be considered as a multivariate system of series and hence the analysis may be done jointly. This approach has considerable advantage over the indirect method, as it utilises the covariance structure between the sub-series.The focus of this thesis is on examining how the accuracy of seasonally adjusted series can be improved by using the sub-series. A model-based approach to seasonally adjusting an aggregated series is carried out with two different methods. The first method utilises a univariate basic structural model (BSM) for the aggregated series. The second method utilises a multivariate basic structural model for the sub-series. In basic structural models, the series components are modelled individually, and then put into state space form. The Kalman filter is applied to obtain estimates of the aggregated series components and the prediction mean squared errors. The variance of the seasonally adjusted series given by the two methods is studied through their relative efficiency. A particular emphasis of the thesis is on how the similarity of and differences between disaggregated series affect the efficiency of the two approaches to seasonal adjustment. Results indicate that gains are attainable under specified conditions which rely on the values of the parameters of not only the seasonal component, but also the non-seasonal components. These results demonstrate the impact on relative efficiency of relationships among sub-series parameters, both between series (i.e. within components) and within series (i.e. between components).The impact of the length of the time series on the accuracy of seasonally adjusted series is of particular interest. A simulation study investigates the parameter estimates obtained given varying series lengths and the subsequent effects on the accuracy of the time series components given by the Kalman filter. These effects are measured by the naive bias in the prediction mean squared error and by the revision error. A bootstrap correction is applied to the estimated prediction mean squared error for both the univariate and multivariate approaches.A single indicator measure is developed for predicting whether the properties of the disaggregated series (or sub-series) will lead to gains in the accuracy of the seasonally adjusted aggregated series. The quasi-likelihood method is applied to obtain the indicator measure of relative efficiency. It is shown to be directly related to the relative efficiency measure obtained with the Kalman filter.Another application of the quasi-likelihood indicator is in identifying an appropriate grouping of the K sub-series into r < K series. The grouping can considerably reduce the number of estimated parameters, while the accuracy of the seasonally adjusted series is maintained.The integrated approach of this thesis to the seasonal adjustment of aggregated series thus provides a pathway to improved efficiency and an understanding of the conditions under which improvements may be achieved.
12
Huang, Wan-Yu M. Eng Massachusetts Institute of Technology, and Jierui Liu. "A joint inventory and sourcing strategy to balance efficiency versus risk." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92641.
Повний текст джерелаАнотація:
Thesis: M. Eng. in Logistics, Massachusetts Institute of Technology, Engineering Systems Division, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 70-72).
This research sought to identify the right strategy to mitigate the supply chain risk while maintaining supply chain efficiency for a company in the medical device industry. The company in our case was exposed to great risk of supplier disruption because of its single source practice. In general, there are two different approaches to reduce the impact of supplier disruption. One is holding additional inventory to cover the demand over the time-to-recovery, and the other is maintaining a second source to reduce the risk. In this research, we proposed a method of distinguishing the better approach. First, we classified the SKUs by criticality and complexity, evaluated the current inventory policy and inventory status, defined the time-to-recovery for each SKU, estimated the potential revenue lost over the time-to-recovery, calculated the additional inventory required, and calculated the related cost for both holding additional inventory and maintaining a second source. Then, we compared the three ROA ratios from holding additional inventory, maintaining a second source, and not taking any action (potential sales lost). The strategy with the highest ROA ratios represented the most efficient way to prevent the risk of supplier disruption. Based on the analysis, holding additional inventory was generally a better strategy for the company in the medical device industry to protect itself from the risk of supplier disruption in any given level of supplier risk.
by Wan-Yu Huang and Jierui Liu.
M. Eng. in Logistics
13
Nip, Wing-ki Vicky. "Redevelopment of Yeung Uk Road complex : market as activity generator /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25947709.
Повний текст джерела
14
Solomina, Hanna, and Yevheniia Zemlianska. "Theoretical foundations for the evaluation of management efficiency of joint investment institutions." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/54618.
Повний текст джерелаАнотація:
1. Педченко Н.С., Дуда М.О. Функціональна модель фінансового
забезпечення діяльності інститутів спільного інвестування. Бізнес Інформ,
2015, №9,с. 346-352.
2. Шевченко A.O. Інститути спільного інвестування на фондовому ринку
України. Економіка та управління АПК,2017, № 1, с. 28-35.
3. Про інститути спільного інвестування: Закон України від 01.01.2014
року № 2299-III. – URL: http://zakon3.rada.gov.ua/laws/show/5080-17.
4. Квартальні та річні огляди ринку управління активами. УАІБ. URL:
http://www.uaib.com.ua/analituaib/publ_ici_quart.html.
5. V.Shvets, O.Tryfonova, H.Solomina, Ya.Petrova. Theoretical and
methodological foundations for the evaluation of management efficiency of joint
investment institutions. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu.
2020 (5) рр.178-183Collective investment market is the environment where conditions for financial provision of economy progress are created by means of investment process and through the cash flow acceleration. Joint investment institutions (JIIs) are the important sources of investment capital playing an important role in its redistribution and stimulating investment process within any country at the expense of domestic and foreign placement of funds. Assets of all current Ukrainian JIIs are managed by asset management companies (AMCs) being legal entities and pursuing professional activities only according to legal regulations, and the obtained license.
15
Schmotzer, Hans. "Knee joint contact stresses : the influence of deformity and muscle activity." Doctoral thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/26674.
Повний текст джерелаАнотація:
Studies have shown that the alignment of the knee in the coronal plane has a significant effect on the joint contact stress. However, gait analysis demonstrated that factors other than alignment contributed significantly to the outcome of corrective surgery. It was therefore hypothesized that muscle contraction can alter the stress distribution within the knee joint and that overloading can occur in the absence of a deformity. Six normal knees were harvested from different donors. The exact orientation of all muscle groups was recorded and their tendinous insertions carefully preserved. Custom built pressure transducers (6 per compartment, 0.5 mm thick, 10 mm diameter) were inserted through 2 small, posterior, capsular incisions and placed on the tibial surface and the menisci. The knees were mounted in a loading system which allowed free self-alignment of the joint under load. All muscles were replaced by wire cables instrumented with force transducer, tensioner and grip. Several alignment models (5, 10 degree varus, neutral, 5 degree valgus and 15 degree of flexion) as well as the effect of contraction of all major muscles crossing the knee joint were tested. An even pressure distribution was seen in neutral alignment. In a varus deformity the peak pressure shifted medially and laterally in valgus. Unloading of the opposite compartment was seen for deformities as small as 5 degrees. A flexion deformity produced a postero-lateral shift of the peak pressure area. Muscle contraction increased the pressure significantly in a region next to the muscle. Generally, unloading - though less significant - was seen in a region diagonally across the joint. These results suggest that muscular hyperactivity may considerable increase the contact stresses. However, muscle weakness or lack of muscular contraction may indirectly play a significant role in affecting the contact pressure distribution. If the muscle force is insufficient to counterbalance the external moment condylar lift-off occurs. This increases the angulation between femur and tibia thereby overloading the compartment where contact takes place; One can therefore conclude that abnormal gait patterns or neuromuscular control mechanisms may result in unphysiologically high contact stresses which may cause the development of unicompartmental osteoarthritis and subsequently, a deformity.
16
Voronkova, T. Ye, and L. L. Maslyuk. "The increase of efficiency in outerwear manufacturing enterprises activity." Thesis, КНУТД, 2016. https://er.knutd.edu.ua/handle/123456789/4817.
Повний текст джерела
17
Denize, Kathrn. "Characterizing Mechanical Efficiency in Pregnancy." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38103.
Повний текст джерелаАнотація:
Pregnancy is an unique period in a woman’s life in which her body undergoes rapid and drastic changes. Historically, physical activity was thought to be dangerous during pregnancy and women were recommended to avoid engaging in most physical activities. Mechanical efficiency, the ratio of external work and energy required to perform a task, is an important consideration when addressing the safety of physical activity, but also when defining recommendations to this population. Currently, there is limited literature that characterizes the change in mechanical efficiency across pregnancy. Of the available literature, suboptimal methodologies were employed, resulting in conclusions that conflict with what would be expected. The purpose of this thesis was to characterize mechanical efficiency across gestation and to compare with non-pregnant women. Women performed a standardized treadmill task in early, mid, and late pregnancy, and energy dynamics were measured. Results showed that energy requirements and external work performed increased over time, and that these were in relation to gestational weight gain. Pregnant women did not exhibit a change in the efficiency of performing a walking task. Overall, these results add to the current literature that supports women’s engagement in physical activity during pregnancy.
18
Reynolds, Morgan E. "It takes two to un-tango: Modulating continuous participation in joint activity." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1594929298207994.
Повний текст джерела
19
Chen, Hua. "Exploring the relationships between influencing factors and performance for construction joint ventures." View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36586596.
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20
Havrylenko, Nataliya, and Iryna Yatsuk. "The Influence of Personnel Motivation to Efficiency Activity of Enterprise's." Thesis, Фінансова рада України, 2017. https://er.knutd.edu.ua/handle/123456789/7476.
Повний текст джерела
21
Pickup, C. M. "Studies on the reflex responses to joint displacement and muscle vibration in man." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376941.
Повний текст джерела
22
Chen, Hua, and 陳華. "Exploring the relationships between influencing factors and performance for construction joint ventures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37731919.
Повний текст джерела
23
Sarantinos, George D. V. "Learning and retention adaptations of myoelectric activity during a novel multi-joint task." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0024/MQ50569.pdf.
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24
Buckley, Rhonda Renee. "The relationships between conflict, marital satisfaction and couples' time spent in joint activity." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/BUCKLEY_RHONDA_27.pdf.
Повний текст джерела
25
Corie, Thomas Henry. "Simulated Tremor Propagation in the Upper Limb: From Muscle Activity to Joint Displacement." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6777.
Повний текст джерелаАнотація:
Although tremor is the most common movement disorder, there are few non-invasive treatment options. One of the obstacles to creating effective tremor suppression devices is our lack of understanding regarding where tremor originates (which muscles), how it propagates through the limb (to which degrees of freedom, DOF), and where it manifests most severely (which DOF). To investigate these questions, we created a simple, linear time-invariant model to simulate tremor, with tremorogenic muscle activity input (in the 15 major superficial muscles from the shoulder to the wrist) and joint displacement output (in the 7 major upper limb DOF). The model included excitation-contraction dynamics, musculoskeletal geometry (muscle moment arms) and the mechanical impedance (inertia, damping, and stiffness) of the limb. From our simulation results, we determined four principles of tremor propagation. First, the distribution of tremor depends strongly on musculoskeletal dynamics. Second, the spreading of tremor is due to inertial coupling (primarily) and musculoskeletal geometry (secondarily). Third, tremor spreads narrowly in the sense that most of the tremor caused by a muscle occurs in a small number of DOF. Lastly, assuming uniform distribution of tremorogenic activity among upper-limb muscles, tremor increases proximal-distally, and the contribution from muscles increases proximal-distally.
26
Pawlak, Jacek, John W. Polak, and Aruna Sivakumar. "A framework for joint modelling of activity choice, duration, and productivity while travelling." Elsevier, 2017. https://publish.fid-move.qucosa.de/id/qucosa%3A72810.
Повний текст джерелаАнотація:
Recent developments in mobile information and communication technologies (ICT), vehicle automation, and the associated debates on the implications for the operation of transport systems and for the appraisal of investment has heightened the importance of understanding how people spend travel time and how productive they are while travelling. To date, however, no approach has been proposed that incorporates the joint modelling of in-travel activity type, activity duration and productivity behaviour.
To address this critical gap, we draw on a recently developed PPS framework (Pawlak et al., 2015) to develop a new joint model of activity type choice, duration and productivity. In our framework, we use copulas to provide a flexible link between a discrete choice model of activity type choice, a hazard-based model for activity duration, and a log-linear model of productivity. Our model is readily amenable to estimation, which we demonstrate using data from the 2008 UK Study of Productive Use of Rail Travel-time. We hence show how journey-, respondent-, attitude-, and ICT-related factors are related to expected in-travel time allocation to work and non-work activities, and the associated productivity.
To the best of our knowledge, this is the first framework that both captures the effects of different factors on activity choice, duration and productivity, and models links between these aspects of behaviour. Furthermore, the convenient interpretation of the parameters in the form of semi-elasticities enables the comparison of effects associated with the presence of on-board facilities (e.g., workspace, connectivity) or equipment use, facilitating use of the model outputs in applied contexts.
27
Farajallah, Mousa. "Chaos-based crypto and joint crypto-compression systems for images and videos." Nantes, 2015. http://archive.bu.univ-nantes.fr/pollux/show.action?id=3c98f067-1a81-4690-9ac6-a515090c482e.
Повний текст джерелаАнотація:
La sécurité des données images et vidéos est importante pour beaucoup d’applications qui exigent du temps réel et un haut niveau de sécurité. Dans la première partie de ce travail, quatre cryptosystèmes basés chaos flexibles, efficaces et très robustes contre la cryptanalyse sont conçus et réalisés. Les deux premiers s’appuient sur le réseau SPN. La substitution est réalisée par une carte Skew tent (FSTM) modifiée pour surmonter différents problèmes : point fixe, restriction de la taille de la clé et limitation de la cartographie entre les textes d’origines et chiffrés. Le troisième cryptosystème est de structure nouvelle et également efficace. Il est basé sur une couche de diffusion binaire de pixels, suivi par une couche de permutation des bits. La permutation est réalisée par une nouvelle formulation efficace de la carte 2-D Cat. Le quatrième cryptosystème, est plus rapide que les autres avec un niveau de sécurité très élevé. Sa conception s’appuie sur une cryptanalyse partielle, que nous avons réalisée, de l’algorithme de Zhang. Dans la deuxième partie, deux crypto-compression basés chaos sélectifs et rapides sont utilisés pour sécuriser le flux HEVC et SHVC. Dans le premier crypto-compression, un nouvel algorithme pour définir les bits chiffrables dans le flux binaire du HEVC et du SHVC est proposé. La solution proposée chiffre un ensemble de paramètres SHVC sensibles au niveau du codeur entropique (CABAC), tout en préservant l’ensemble des fonctionnalités SHVC. Basé sur le concept de tuile, le deuxième crypto-compression proposé permet une protection de la vidéo au niveau d’une Région d’Intérêt (ROI) définie dans le standard HEVCThe security of image and video data is important for many applications which require in real-time a high security level. In the first part of this work, four chaos-based cryptosystems, flexible, efficient, and more robust against cryptanalysis, are designed and realized. The first two cryptosystems are based on the substitution-permutation network. The substitution is achieved by a proposed modified Finite Skew Tent Map (FSTM) to overcome various problems: fixed point, key space restriction, and limitation of mapping between plaintext and ciphertext. The third cryptosystem is a new and efficient structure. It is based on a binary diffusion layer of pixels, followed by a bit-permutation layer. The permutation is achieved by an efficient proposed formulation of the 2-D cat map. The fourth cryptosystem is faster than the others, having a very high security level. The confusion and the diffusion are performed in a single scan. Its design is based on a partial cryptanalysis that we performed on the Zhang algorithm. In the second part, two fast and secure selective chaos-based crypto-compressions are designed and realized to secure the High Efficiency Video Coding (HEVC) and its scalable version. In the first crypto-compression, a new algorithm is proposed to define the encryptable bits in the bit stream of the HEVC and the SHVC systems. The proposed solution encrypts a set of sensitive SHVC parameters at the entropy encoder (CABAC), while preserving all SHVC functionalities. Based on the tile concept, the second proposed crypto-compression provides protection of the ROI defined in the standard HEVC
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Baroutsi, Nicoletta. "Communication in Joint Activity : Investigating Teams’ Communication Pattern in a Dynamic Decision Making Environment." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-112244.
Повний текст джерелаАнотація:
The complexity in the world is continuously increasing. Teams are faced with imperfect information in uncertain, dynamic, and time critical environments as they strive to make the right decisions, not just as individuals, but as a team. In this joint activity the members choreograph their actions and synchronize their behavior through the use of communication. Communication is the predominant form of interaction within teams – it is not only a window into team cognition – it is an externalized cognitive process at a team level (Letsky, Warner, Fiore & Smith, 2008). In an earlier study, non-professional participants were trained in teams of three to become high-performing within the C3Fire microworld (Baroutsi, Berggren, Nählinder and Johansson, 2013). In this microworld the team members are faced with the dynamic decision problem of fighting a forest fire. They have interdependent roles, requiring them to coordinate and strategize on a team level, making C3Fire a suitable platform for investigating dynamic decision making in teams. These six trained teams were compared to six untrained teams in a final experiment through a variety of measures, showing that the trained teams differed significantly in terms of both performance and in other important team aspects (Baroutsi, Berggren, Johansson, Nählinder, Granlund, Turcotte, & Tremblay, 2014; Berggren, Baroutsi, Johansson, Turcotte, & Tremblay, 2014; Berggren, Johansson, Baroutsi, & Dahlbäck, 2014; Berggren, Johansson, Svensson, Baroutsi, & Dahlbäck, 2014; Baroutsi, Berggren, Johansson, manuscript). These differences were thought to have an impact on the communication shared among the team members. Hence, the purpose of the present report was to investigate how the communication pattern was affected by these differences. The communication was analyzed using a coding scheme that categorized the content of the teams’ utterances. No difference was found in terms of communication frequency between the two types of teams. However, the trained and untrained teams did differ in communication content. The trained teams communicated more frequently about the context and the situation, while the untrained teams communicated more about the activities of the team. This can be interpreted as a deficiency in common ground, directability, and interpredictability (Klein, Feltovich & Bradshaw, 2005) among the untrained teams. Also, the communication content explained 88.3 % of the variance in performance.I en värld av ständigt ökande komplexitet, som karaktäriseras av ofullständig information och dynamiska, tidskritiska miljöer, strävar människor efter att fatta rätt beslut – inte som individer – utan även som ett team. I denna gemensamma aktivitet behöver medlemmarna synkronisera sina handlingar, vilket utförs med hjälp av kommunikation. Kommunikationen är den dominerande formen av interaktion inom ett team, och är även en externalisering av teamets kognitiva processer (Letsky, Warner, Fiore & Smith, 2008). I en tidigare studie har oerfarna deltagare tränats i team om tre, för att bli högpresterande inom mikrovärlden C3Fire (Baroutsi, Berggren, Nählinder och Johansson, 2013). I denna mikrovärld står teammedlemmarna inför ett dynamiskt beslutsproblem - att bekämpa en skogsbrand. Rollerna i teamet är ömsesidigt beroende av varandra, vilket kräver att de samordnar och lägger upp strategier på en teamnivå för att på ett framgångsrikt sätt kunna lösa uppgiften. Dessa sex tränade team jämfördes sedan med sex otränade team i ett experiment. Flera mått användes för att bedöma teamen (CARS, DATMA, Shared Priorities, m.fl.), vilket visade att de tränade teamen skilde sig både avseende prestation, men även inom andra viktiga teamaspekter (Baroutsi, Berggren, Johansson, Nählinder, Granlund, Turcotte, & Tremblay, 2014; Berggren, Baroutsi, Johansson, Turcotte, & Tremblay, 2014; Berggren, Johansson, Baroutsi, & Dahlbäck, 2014; Berggren, Johansson, Svensson, Baroutsi, & Dahlbäck, 2014; Baroutsi, Berggren, Johansson, manuskript). Syftet med denna rapport är att undersöka hur kommunikationsmönstret påverkas av dessa skillnader. Kommunikationen analyserades med hjälp av ett kodningsschema där innehållet i teamens uttalanden kategoriseras. De två olika typerna av team uppvisade ingen skillnad i antalet uttalanden, men skillnader fanns för olika kommunikationskategorier. De tränade teamen kommunicerade oftare angående sammanhanget och situationen, medan de otränade teamen oftare kommunicerade om de aktiviteter som pågick. Detta kan tolkas som en brist i den gemensamma förståelsen, styrbarheten och förutsägbarheten mellan teamets medlemmar (Klein, Feltovich & Bradshaw, 2005) hos de otränade teamen. Kommunikationsinnehållet förklarade 88,3 % av variationen i prestationen.
The Swedish Armed Forces research and development (R&D) project AVALO
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Mohamed, Hodan Hassan Ahmed. "Transcriptional and post-transcriptional control of therapeutic gene expression during disease activity." Thesis, Queen Mary, University of London, 2015. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8291.
Повний текст джерелаАнотація:
Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease which predominantly affects the synovial joints. Local gene therapy represents an approach to produce therapeuticmolecules (i.e. soluble TNF receptor (sTNFR)-Fc and interleukin-1 receptor antagonist (IL-1Ra)) directly in arthritic joints. Gene therapy could be designed to link the level of therapeutic gene expression directly to disease activity, through the use of transcriptional and posttranscriptional regulatory elements. The experiments in this thesis describe the construction of multi-responsive, composite synthetic promoters, comprised of the binding sites for an array of transcription factors activated in arthritic joints. Optimal spatial arrangements of binding sites in relation to each other and to the TATA box were determined by Assembly PCR cloning and the functionality of the resulting synthetic promoters revealed additive or synergistic induction of luciferase reporter gene expression in response to combined stimulation. Candidate synthetic promoters were cloned into a lentiviral vector between insulator elements and displayed significantly enhanced induction, in excess of 1,500 fold in response to combined stimulation. Inflammation-specific activation of lentiviral synthetic promoters was confirmed in a carrageenan-induced paw inflammation mouse model, which demonstrated the strong correlation between local luciferase gene expression and paw inflammation. Post-transcriptional gene regulation was also investigated by exploiting the differential expression of endogenous miR-23b during inflammation. Insertion of miR-23b target sites into the 3’UTR of the luciferase gene subjected luciferase mRNA to regulation by miR-23b. Experiments demonstrated that high basal gene expression driven by constitutive and inducible promoters was significantly downregulated by miR-23b without significantly impairing high gene expression upon stimulation. Overall, the experiments in this thesis have confirmed the induction of inflammation-specific gene expression, regulated by inflammationresponsive endogenous transcriptional and post-transcriptional elements.
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Heebner, Maryellen. "Comparison of Different Transmission Approaches to Optimize Exoskeleton Efficiency." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1576609767744357.
Повний текст джерела
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Anderson, Trisha. "Time Efficiency in Computer Assisted Direct Observation of Physical Activity using SOFIT." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd933.pdf.
Повний текст джерела
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Wang, Ning. "Energy efficiency and classification accuracy trade-offs in accelerometry-based activity recognition." Thesis, University of Southampton, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.586895.
Повний текст джерелаАнотація:
Driven by growing real-world application 'such as healthcare challenges, accelerometry-based activity recognition has been widely studied as a potential context-aware subsystem for the future pervasive healthcare system. Reliable, accurate recognition and energy efficiency to enable long-term and non-intrusiveness activity monitoring are the key issues for practical use in healthcare applications. A great number of activity recognition systems have been proposed focusing on sensor node design and recognition algorithm development to achieve good classification performance, while the trade-offs between recognition accuracy and energy efficiency has not been investigated in depth. This research investigates this issue by comparing on-node and off-node activity recognition schemes through a practical development. The main contribution of this research is concluded as follows. Firstly, the trade-offs between classification accuracy and energy efficiency is raised as the key issue in sensor based activity recognition system to tackle the real world application challenges. Then this research presents a systematic, empirical design process for optimizing an activity recognition system with respect to the above issue. Such design process involves defining application, designing hardware platform, developing classification recognition algorithm, energy consumption modelling and real system performance evaluation. On-node and off-node classification schemes are the two design philosophies which are compared in this process. This research performs the first step to strike the energy-accuracy trade-offs in body sensor based activity recognition system. The future work should be generalised in two ways. First, different design schemes between the two extreme design philosophies are to be analysed. Then, more classification algorithms should be investigated.
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Olausson, Jesper. "Energy efficiency in a renovated modern office with activity-based work style." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30113.
Повний текст джерелаАнотація:
During renovation Ljusåret 2 was converted to a modern office with an activity based work style (ABW) with a Demand Controlled Volume (DCV) ventilation system connected to a closed-loop duct. Cooling is provided through air handling units and active water based beams, the underfloor heating system was kept. Written instruction and specification have been studied for the two different control systems Schneider EcoStructure and Lindinspect. Both control systems have been analyzed according to time schedule, set-point and process value by using different functions in software. To be able to perform a energy audit and look at indoor climate for Ljusåret 2 there have been studies according to underfloor heating, constructions of ventilation system, diversity factor for DCV, closed-loop-ducts, heat losses from ducts, cooling demand and energy certification. According to this audit, energy performance is calculated to 89.1 kWh/m2 according to building energy, activity energy is not audited or calculated. During design phase, an energy calculation was made by an energy consultant with the result of 81.3 kWh/m2. The estimated performance is a 9.6 % increase. This building is designed for Miljöbyggnad certification of level silver and should be ≤ 109 kWh/m2,year. According to audit and calculation for energy performance this level is possible to keep. The estimated energy performance have been calculated with only 4 month of statistics from January until April 2019 because Ljusåret 2 have just been renovated. District heating has been estimated through the energy signature by data from energy meter. Electrical components for the building have been measured and energy usage calculated. Energy produced by compression chiller have been estimated with calculated performance from design phase and adding heat transfer between rooms and supply ducts. Energy between rooms and supply ducts were not included in energy calculation during the design phase. According to the control system for the DCV system there have been some issues with high temperature in supply ducts even when they are supplied with 15 ºC from air- handling unit. There have been measurement to the ventilation system 5701-5704 that is connected to a close-loop duct with a result of temperatures between 15.2 ºC up to 21.4 ºC and the velocity has varied between 0.05-2.1 m/s in different measurement spots. This is an increase of 6.4 ºC. A heat transfer calculation have been made in Paroc Calculus to estimate heat transfer between room and supply ducts. The results of this calculation indicates the same level of temperature increases as when the system was measured. With no thermal insulation cooling capacity is lost to half after less than 5 m with a velocity of 0.2 m/s, after 15 m with a velocity of 1 m/s and 30 m with a velocity of 2 m/s . This should be compared with supply duct with 20 mm of thermal insulation that has lost its cooling capacity after less than 13 m with a velocity of 0.2 m/s, after 63 m with a velocity of 1 m/s and is increase with 4 ºC after 100 m with a velocity of 2 m/s. Using closed-loop ducts with velocity below 2.0 m/s and without thermal insulation combined with under tempered supply air is not a good combination. Even short length with low velocity and lack of thermal insulation is devastating because of heat transfer according to logarithmical temperature difference between room and supply ducts. A closed-loop duct is often designed as a pressure chamber and recommended when using DCV and/or VAV ventilation to avoid problems with noise and to be able to reduce the need of dampers. Problems with temperature increasing according to velocity in ducts must be taken in consideration. For Ljusåret 2 this will affect district heating usage where ducts are placed because underfloor heating must compensate heat transfer. Chilled water must be provided an extra time for rooms with both DCV and chilled beams and rooms with only DCV is less comfortable which they could been with a correct installation.
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Reichling, Peter, and P. G. Pererva. "Choice of the criteria of efficiency of innovative solutions." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/40228.
Повний текст джерела
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Fredriksson, Robert, and Milovan Trkulja. "Fuel Efficiency in AWD-system." Thesis, Jönköping University, JTH, Mechanical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1589.
Повний текст джерелаАнотація:
This degree project has been made in cooperation with engineers working for GM Engineering/Saab Automobile AB in Trollhättan. The given name by Saab for the project is “Fuel efficiency improvements in All Wheel Drive(AWD)-system”. The main tasks of this thesis work were to investigate the size of the power losses in different parts on the propeller shaft, to design a computer program that calculates
coordinates and angles on a propeller shaft and to investigate the possibilities to put together a simplified formula that calculates the natural frequencies on a propeller shaft.
The main parts of this report are a compilation of the theory about AWD and mostly about the parts on the propeller shaft, and also a description of the developed computer program called Propeller Shaft Calculator. This report doesn’t concern power losses in the different joints because there were no such general equations to be found. The most common way to calculate the power losses inside a joint is to do tests were the power loss is measured at different angles, torque and speed and then use that data to put together an approximated equation.
Most of the work on this project has been on theory studies and on programming. The main result of the project is the program Propeller Shaft Calculator.
Propeller Shaft Calculator is a program that is designed in Microsoft Excel. All the menus are programmed in the visual basic editor in Excel. The program is supposed to be used as a help while designing new propeller shafts.
Propeller Shaft Calculator can calculate all the coordinates, lengths, angles and directions on a propeller shaft. It also calculates natural frequencies, plunge, estimated power loss on the second shaft and angles in the joints. In the program you can choose to do calculations on four different configurations of propeller shafts but can quite
easy upgrade the program with more choices.
Basically the program works like this:
First you choose the right propeller shaft in the main menu. Then you fill out the indata sheet with coordinates, lengths, material data and so on. As you type in the input data the output data will appear in the out-data sheet next to the in-data. Every propeller shaft has also a calculations sheet were more detailed calculations can be
found.
The program also has a built in help function and a warning function that lights a warning sign next to the values if they are outside the limits.
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Theoret, Daniel. "Three dimensional knee joint kinematics and lower limb muscle activity of anterior cruciate ligament deficient knee joint participants wearing a functional knee brace during running." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27057.
Повний текст джерелаАнотація:
Background. Knee braces have been found to provide limited stability to the ACL deficient knee in situations where the knee is loaded during sporting movements. Different adaptation strategies have been found between patients that can cope with the injury and patients that cannot. One of the expected changes can be muscle activation characteristics of the injured knee during strenuous activity with and without a functional knee brace.
Methods. Three dimensional (3D) kinematic and electromyography (EMG) data were collected from each participant for ten consecutive gait cycles during running on a treadmill under both braced and unbraced conditions. Participants were administered the "Knee Outcome Survey Activities of Daily Living Scale" to distinguish functional and non-functional candidates.
Findings. No significant differences on 3D kinematics and EMG data were noted between functional and non-functional participants, thus data analysis focused on comparisons of bracing conditions for one combined group. Bracing significantly increased total range of motion in the sagittal plane (p<0.05) and reduced total range of motion in the transverse plane (p<0.05). Muscle activity at heel-strike showed a consistent trend to increase for the hamstrings and decrease for the quadriceps under the braced when compared to the unbraced condition.
Interpretations. Our findings indicated that bracing the ACL deficient knee altered kinematics of the injured leg while running. Tendencies towards reductions in quadriceps and increases in hamstrings activity at heel-strike provides added stability to the injured knee. These changes to bracing further support the mechanical and the proprioceptive contributions of the functional knee brace to protect the ACLD knee.
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Nip, Wing-ki Vicky, and 聶詠祺. "Redevelopment of Yeung Uk Road complex: market as activity generator." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31986006.
Повний текст джерела
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Rönquist, Gustaf. "Relationship between knee joint angle and fine-wire EMG activity of the four quadriceps femoris muscles." Thesis, Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-4120.
Повний текст джерелаАнотація:
The purpose of the present study was to investigate the electromyography (EMG)-knee joint angle relationship and the differences in activity among the four quadriceps femoris (QF) muscles during maximal voluntary isometric knee extensions. Ten well-trained healthy male volunteers (mean ± 1 standard deviation (SD) age 33 ± 11 years, height 1.83 ± 0.07 m, body mass 79 ± 4.7 kg) performed maximal isometric knee extensions in a seated position at four different knee joint angles (90º, 65º, 40º, and 15º of knee flexion). Myoelectric activity was simultaneously recorded from rectus femoris (RF), vastus lateralis (VL), vastus medialis (VM), and vastus intermedius (VI) using fine-wire EMG. Root-mean-square (RMS) was calculated during a sustained phase of one second at each of the different knee joint angles tested. Results showed that the RMS value of the VM was significantly higher at 90º compared to 40º (P < 0.05). When comparing 90º-normalized RMS values among the four QF muscles collapsed across the three most extended positions (65º, 40º, and 15º of knee flexion), significantly lower normalized RMS value was observed for the VM compared to that of the RF (P < 0.01) and VL (P < 0.05), respectively. No significant differences in RMS values between knee joint angles were observed for any of the other QF muscles (RF, VL, and VI). These results suggest that VM muscle activity is highest at more flexed knee joint angles during a seated knee extension task. Further, as the knee gets more extended, muscle activity of the VM decreases and VM becomes less active than the VL and RF, respectively.Syftet med denna studie var att undersöka sambandet mellan elektromyografisk aktivitet (EMG) och vinkel i knäled, samt att jämföra skillnaden i aktiveringsgrad mellan quadriceps femoris (QF) fyra delmuskler vid maximala viljemässiga isometriska knäextensioner. Tio vältränade friska män (medelvärde ± 1 standardavvikelse, ålder 33 ± 11 år, kroppslängd 1,83 ± 0,07 m, kroppsvikt 79 ± 4,7 kg) deltog frivilligt i studien. Samtliga deltagare genomförde maximala isometriska knäextensioner i sittande position vid fyra olika vinklar i knäled (90º, 65º, 40º och 15º knäflexion). Myoelektrisk aktivitet registrerades samtidigt från rectus femoris (RF), vastus lateralis (VL), vastus medialis (VM) och vastus intermedius (VI) med hjälp av intramuskulär EMG (trådelektroder). Det kvadratiska medelvärdet (engelska root-mean-square, RMS) beräknades under en en-sekundersperiod vid respektive ledvinkel. Resultaten visade att RMS-värdet för VM var signifikant högre vid 90º jämfört med 40º (P < 0,05). Vid en jämförelse av 90º-normaliserade RMS-värden mellan QF olika delmuskler för de tre mest extenderade positionerna (65º, 40º och 15º knäflexion) observerades signifikant lägre normaliserade RMS-värden för VM jämfört med RF (P < 0,01) respektive VL (P < 0,05). Inga signifikanta skillnader i RMS-värde mellan de olika ledvinklarna sågs för någon av de övriga delmusklerna (RF, VL och VI). Dessa resultat tyder på att VM är som mest aktiv vid mer flekterade knäledsvinklar under sittande knäextensioner. Vidare kommer aktiviteten i VM att minska allteftersom knäet blir mer extenderat, och dess aktivitet blir då lägre jämfört med VL respektive RF.
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Alder, Emma K. "Temporomandibular Joint Disorder: An Investigation of Masseter Muscle Activity in Response to Stressful Computer Data Entry." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339772763.
Повний текст джерела
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Giroux, Benoit. "Net shoulder joint moment and muscular activity during light weight handling at different heights and frequencies." Thesis, University of Ottawa (Canada), 1990. http://hdl.handle.net/10393/5728.
Повний текст джерелаАнотація:
Ten (10) normal adult male subjects were asked to move a known weight, representing 15% of the maximal lifted weight, in both horizontal and vertical conditions at frequencies of 40 cycles/min and 60 cycles/min. Raw EMG signals from six (6) shoulder muscles were recorded and synchronized with the cinematographic data during three (3) trials of six (6) seconds each. The raw EMG signals of each muscle were full wave rectified and filtered at three (3) Hz. The LE EMG signals were normalized by time (% cycle) and by amplitude (% MVC), and for the analysis of variance, the normalized LE EMG signals were integrated (IN LE EMG). The average shoulder angular velocities, joint moments and moment powers were computed from cinematographical data. No significant difference were observed between both tasks for the supraspinatus, infraspinatus, and pectoralis major IN LE EMG data as well as for integrated normalized shoulder joint moment for the whole cycle of movement. IN LE EMG data from middle deltoid, anterior deltoid, and trapezius muscles were significantly higher (p 0.05) when performing the vertical displacement task for the whole cycle of movement. (Abstract shortened by UMI.)
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Chang, Li-Shan. "Effects of Stroke Patterns on Shoulder Joint Kinematics and Electromyography in Wheelchair Propulsion." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/kin_health_diss/3.
Повний текст джерелаАнотація:
The purpose of this dissertation was to analyze shoulder joint kinematics and electromyographic activities of wheelchair propulsion between two stroke patterns. Twenty physical therapy students (14 females and 6 males, age 27.4 ± 5.9 years, body mass 64.41 ± 9.37 Kg and body height 169.32 ± 9.12 cm) participated. Eleven reflective markers were placed on thorax and right scapula, humerus, third metacarpophalangeal joint and wheelchair axle. Surface electrodes were placed on right pectoralis major, anterior and posterior deltoids, infraspinatus, middle trapezius, biceps brachialis long head and triceps brachialis. Participants propelled a standard wheelchair on a stationary roller system at 0.9 m/s and 1.8 m/s with semicircular (SC) and single loop (SL) stroke patterns for 20 seconds. Three-dimensional body movement and muscle activities were recorded at 100 and 1000 Hz, respectively. All data were compared for differences between two patterns and two speeds using 2-way repeated measures ANOVA (α < .05). Results showed longer drive phase and shorter recovery phase in SC when compared to SL, with no difference found on cycle time. Smaller release angles in SC caused longer angle ranges of hand contact on the pushrim while initial contact angles did not change. During drive phase, smaller scapular protraction range of motion (ROM) was found in SC. Shoulder abduction in drive phase was larger in terms of the maximal angle and ROM. In the recovery phase, minimal scapular tilting, protraction, and shoulder abduction and internal rotation were larger in SC when compared to SL pattern. Shoulder linear velocities and accelerations were higher in both phases for abduction/adduction and flexion/extension in SC. For SC pattern, pectorals major and middle trapezius showed lower activities during drive phase while posterior deltoid and triceps showed higher activities during both phases when compared to SL. Although posterior deltoid and triceps muscles work harder in SC pattern, longer drive phase and lower muscle activities in pectorals major and middle trapezius during the drive phase may make SC the better stroke pattern in wheelchair propulsion when compared to SL.
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Shkarupa, I. S. "Factors and instruments of managing the efficiency of entrepreneurial activity in modern transforming conditions." Thesis, Sumy State University, 2020. https://essuir.sumdu.edu.ua/handle/123456789/81026.
Повний текст джерелаАнотація:
Досліджуються Фактори та інструменти управління ефективністю підприємницької діяльності в сучасних умовах трансформації ринку.Исследуются факторы и инструменты управления эффективностью предпринимательской деятельности в современных условиях трансформации рынка.
Factors and instruments for managing the effectiveness of entrepreneurial activity in modern conditions of market transformation are studied.
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Chen, Renjie. "Using PPP deviations as a trading rule : an indirect joint test of PPP and foreign exchange market efficiency." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/42010.
Повний текст джерелаАнотація:
In this thesis an international investment filter rule is used to test both the tendency for
Purchasing Power Parity (PPP) to hold in the long run and the hypothesis of foreign
exchange market efficiency for the four most actively traded currencies in the world
vis-a-vis the United States dollar: the British pound, the Japanese yen, the Germany
mark, and the Canadian dollar. One way to examine whether there is a tendency for
PPP to hold in the long run and whether the foreign exchange market is efficient, is to
place more money in the 'undervalued' currency according to PPP deviations or to invest
according to PPP deviations, putting more money into interest bearing securities in the
'undervalued' currency, the more this currency is undervalued. The return can then be
compared with a reference rule which does not use this filter, but instead puts an equal
value of money into the currencies or the securities of each country.
This thesis has produced three results. First, using the PPP filter in the exchange
money market yields no significantly abnormal rate of return compared with the reference
rule. The result suggests that we can not reject the hypothesis that the tendency for PPP
to hold in the long run does not exist. Second, using the PPP filter to invest in securities
also yields no significantly higher rate of return compared with the reference rule. And
third, when comparing the domestic (or foreign) interest rates with the rates of return
for the domestic (or foreign) investor who uses the PPP filter, there is no significant
difference between these rates in the long run. The last two results suggest that we can
not reject the hypothesis that the foreign exchange-market is efficient.Business, Sauder School of
Graduate
44
Soisson, Odette, Juliane Lube, Andresa Germano, Karl-Heinz Hammer, Christoph Josten, Freddy Sichting, Dirk Winkler, Thomas L. Milani, and Niels Hammer. "Pelvic belt effects on pelvic morphometry, muscle activity and body balance in patients with sacroiliac joint dysfunction." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-167389.
Повний текст джерелаАнотація:
The sacroiliac joint (SIJ) is frequently involved in low back and pelvic girdle pain. However, morphometrical and functional characteristics related to SIJ pain are poorly defined. Pelvic belts represent one treatment option, but evidence still lacks as to their pain-reducing effects and the mechanisms involved. Addressing these two issues, this case-controlled study compares morphometric, functional and clinical data in SIJ patients and healthy controls and evaluates the effects of short-term pelvic belt application.
45
Micski, Erik, and Ulrika Ottosson. "Calculation of Tidal Volume based on EMG-activity of the Diaphragm." Thesis, KTH, Skolan för teknik och hälsa (STH), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210547.
Повний текст джерелаАнотація:
The objective of the thesis was to evaluate the possibility to calculate the unloading distribution between a ventilator and a patient using a new mathematical modelling of the breathing patterns. The modelling used today is considered to lack sufficient precision for clinical use, and is a somewhat simplified model. To evaluate the possibility of a new model, a volunteer test was carried out - recording data such as Edi, pressure, volume and flow. Using this data, and by using a more complex model, tidal volume was estimated and compared to the measured data. The results did not imply any improvement compared to the simpler model regarding the accuracy and the variability. However, more work should be done in this area, as time deficiency prevented further analysis.
46
Musau, Filbert. "Space planning and energy efficiency in buildings : the role of spatial, activity and temporal diversities." Thesis, University of Cambridge, 2005. http://radar.gsa.ac.uk/3306/.
Повний текст джерелаАнотація:
When it becomes necessary to use mechanical energy in buildings, it would be expected that the amount used should not only correspond to the density of spatial utilisation but also the occupancy patterns, or vice versa – that vacancy patterns should produce corresponding reductions in energy use. Empirical evidence suggests that this is not always the case. This research aimed to find out if patterns of interior space organisation and/or utilisation have corresponding patterns of energy consumption, and if planning and/or utilisation programming strategies can enable energy savings. Although this study acknowledges that space planning is related to user organisations, it is not about such relationships. Previous research alludes to the following factors as potential determinants of energy use, but their quantitative degree of influence is not well understood: properties of interior construction elements; environmental interaction/autonomy between spaces; circulation configuration; layout density; activity relationships; and temporal factors of space use. The influence of these factors on energy is examined by quantitative analysis, which matches different plan regimes and environmental systems against different occupancy regimes. The wider target is buildings that experience varied patterns of occupancy, but the focus here is on office, laboratory, and library building typologies, by way of examples. The quantification is by computer simulation using established software packages (TAS, Lightscape, and Flovent) and Excel spreadsheets developed for this work. Further investigations in selected case study buildings involve first monitoring spatial utilisation and the corresponding running environmental systems. The data are then used to quantitatively evaluate the performance of the existing layout against hypothetical options on the existing ‘shell and core’ of each building. A conceptual approach for energy saving, which is partly based on the findings of the parametric and empirical studies, is then formulated and tested in some of the case study buildings. The thesis demonstrates that: different patterns of spatial, activity, and systems organisation have corresponding patterns of energy use; and that significant energy savings can be achieved in a best practice ‘shell and core’ through the right match of space plans with space use patterns – with potentially higher savings in a wasteful shell. It also demonstrates that adopting approaches that dynamically adjust to the temporal diversity of space use can also enable significant savings. One such approach is proposed and promising directions for further research are suggested.
47
Ladan, Helena. "Improvement of the efficiency of the door panel department layout at IAC Group AB in Låssby." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-12086.
Повний текст джерелаАнотація:
This bachelor thesis was written in cooperation with IAC Group AB in Låssby/Gothenburg. The report explains the background to this project and why it was started. It also describes some theory which is needed to understand the project that has been made and which methodologies that have been used during this study. In this project the current state of the door panel department layout was analyzed and studied. Very early on it became clear that one of the biggest wastes for this department is related to operators walking. To make an improvement the focus was on reducing the unnecessary walking distances that the operators have to make and also not exceed the given budget. Six different layout alternatives were analyzed in regards to these factors and compared with each other as well as with the current state. The comparisons resulted in an own layout suggestion which is a combination of some of the six layouts analyzed but also own inputs. This layout is recommended for the company to implement since it reduces the unnecessary walking distances the most of all alternatives and the investment for it is within the given budget.
48
Afanasieva, Inna, and Maria Lesko. "Assessment of the efficiency of financial resources of the company." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/54644.
Повний текст джерелаАнотація:
1. Vints, J. O. Improvement of management of financial resources of an
enterprise. State and Regions. 2007. №6. С. 325-328.
2. Kravtsova A. M. Estimation of the Efficiency of the Process of Use of
Financial Resources of the Enterprise. Economika Krimu. 2006. №16. С. 47-50.
3. Gryhorash T. Srednevozvazhennaya varti kapitalu: peculiarities of the
calculation in Ukraine and in the world. Business Inform. 2016. № 11. С. 281-286.
4. Estimation of the Efficiency of Use of Financial Resources of the Enterprise.
URL: https://www.econa.org.ua/index.php-/econa/article/view/1480/6565656606
(date of application 03.12.2021).It is presented that financial resources are the material substance of financial relations, the size and composition of which affect the efficiency of economic activity. The article determines the structure of the aggregate indicator and the criteria for assessing the efficiency of use of financial resources.
49
Solomina, Hanna Valeriivna. "Assessment of the efficiency of management of co-investment institutions." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/54023.
Повний текст джерелаАнотація:
1. Gaidai, G.G. (2019). Investment portfolio of the enterprise as an important component of investment strategy. Herald of National Transport University, Series ”Economics”. Is. 2 (44), 48-55. DOI: 10.33744/2308-6645-2019-2-44-048-055.
2. Kosova Т.D., & Yaroshevska O.V. Concepts of financial regulation of stock activity of economic entities. (2019). In Theoretical and methodological bases of Ukraine's financial system development through innovation and investment strategies: collective monograph. In: Т.D. Kosova, N.О. Slobodianiuk (Eds.). Kryvyi Rih: DonNUET, 33-43.
3. V. Shvets, O. Tryfonova, H. Solomina, Ya. Petrova. Theoretical and methodological foundations for the evaluation of management efficiency of joint investment institutions// Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2020, (5): 178-183.doi.org/10.33271/nvngu/2020-5/178.The research is aimed at developing theoretical and methodological foundations for a comprehensive assessment of the efficiency of management of joint investment institutions from the position of forming their portfolios of assets and the efficiency of the institutions as a whole.
Дослідження спрямоване на розробку теоретико-методологічних засад для комплексної оцінки ефективності управління інститутами спільного інвестування з позиції формування їх портфелів активів та ефективності діяльності інститутів в цілому.
50
Bryant, Elizabeth. "The effect of retirement on lower limb strength, joint range of motion, balance performance and physical activity levels." Thesis, University of Brighton, 2005. https://research.brighton.ac.uk/en/studentTheses/e9cccbd6-add3-4d69-be05-f6df9b7125df.
Повний текст джерелаАнотація:
Retirement is considered a critical stage of life with profound changes in an individual’s life and lifestyle. With increased life expectancy, an individual could spend a third of his/her lifetime in retirement. It is in this period that falls start to become commonplace and they have been linked to lower limb muscle weakness, reduced joint range of motion, and balance instability. The objective of this longitudinal study was to investigate whether the sudden life changes that occur at retirement are reflected in changes in lower limb strength, joint range of motion, balance performance and physical activity levels. Following a series of pilot studies, ninety-seven healthy individuals aged 50 – 67 years (mean ± [SD] 59.6 [3.9] years) consented to participate in the study (44 males, 53 females). Two groups were established: a retirement group (due to retire imminently), and a control group (at least 12 months away from retirement). Assessments of lower limb strength, joint range of motion, balance performance and physical activity levels within the workplace and household, leisure and sporting activities were undertaken at baseline (one week pre-retirement for the retirement group) and repeated six and twelve months later. The t-Test for independent samples was used to analyse the difference between the groups’ mean values at baseline. No significant differences were found between the retirement group and the control group for the measurement variables (P > 0.05). Correlations were found between balance performance, peak torque and joint range of motion measurements. One third of the participants in both the retirement and control groups were sedentary, and the average lower limb strength values were lower than expected for this age group. Repeat assessments were undertaken six and twelve months post baseline measurements. A mixed design factorial ANOVA test was used to investigate any differences between visits for the groups. Significant differences between the retirement and control group were only observed in the reported physical activity levels for household, leisure and sporting activities (P < 0.01), as the activity level of the control group remained stable, whilst the activity level of the retirement group increased. It would appear that in the twelve months following retirement there is no measurable effect on lower limb strength, joint range of motion or balance performance. This may be due to the significant increase in physical activity levels post retirement, which may have compensated for the loss of physical activity undertaken within the workplace.