Thematische Bibliographien / Safety break

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Auswahl der wissenschaftlichen Literatur zum Thema „Safety break“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 11. Februar 2022

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Zeitschriftenartikel zum Thema "Safety break"

Johnson, Hope L., and Diane Kimsey. "Patient Safety: Break the Silence." AORN Journal 95, no. 5 (2012): 591–601. http://dx.doi.org/10.1016/j.aorn.2012.03.002.

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Lin, Zhong, Jin Tao Sun, Rong Han Wu, Nived Moonasar, and Ye Hui Zhou. "The Safety and Efficacy of Adjustable Postoperative Position after Pars Plana Vitrectomy for Rhegmatogenous Retinal Detachment." Journal of Ophthalmology 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/5760173.

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Purpose.To report the safety and efficacy of adjustable postoperative position for rhegmatogenous retinal detachment (RRD).Methods.Retrospective review of 536 consecutive RRD eyes that underwent vitrectomy surgery for retina repair from year 2008 to 2014. The retinal breaks were divided into superior, lateral (nasal, temporal, and macular), and inferior locations, according to the clock of breaks. Patients with superior and lateral break location were allowed to have facedown position or lateral decubitus position postoperatively, while patients with inferior break location were allowed to have facedown position.Results.403 eyes of 400 patients were included. The mean follow-up interval was 22.7 ± 21.3 months. The overall primary retinal reattachment rate was 93.3%. There were 24 (6.0%), 273 (67.7%), and 106 (26.3%) patients with superior, lateral, and inferior break location, respectively. The primary reattachment rate was 95.8%, 92.3%, and 95.3% accordingly. After further divided the break location into subgroups as a function of duration of symptom, postoperative lens situation, number of retinal breaks, and different vitreous tamponade, the primary reattachment rates were all higher than 82%.Conclusion.Adjustable postoperative positioning is effective and safe for RRD repair with different break locations. Choosing postoperative position appropriately according to retinal break locations could be recommended.

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Gil, Leszek, Daniel Pieniak, and Agata Walczak. "Safety in road transport." Scientific Journal of the Military University of Land Forces 189, no. 3 (2018): 36–42. http://dx.doi.org/10.5604/01.3001.0012.6225.

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The article describes the transport process and the drivers’ approach with regard to respecting the applicable driver's working time standards. This paper presents and discusses the results of a survey conducted among professional drivers, the primary purpose of which was to obtain the response to the question whether drivers actually rest during the break. Legal regulations strictly determine the minimum daily and weekly rest periods and the maximum daily and weekly driving times. Appropriate advanced technologies represented by measuring tools to the great extent oblige drivers to take a rest at the right time. Nevertheless, on the basis of the research it was stated that drivers frequently execute other activities, thus trying to increase their profits during break time, and therefore they commit for a rest shorter time than this resulting from the current working time regulations. The introduction of newer and more advanced solutions in the recording equipment substantially limits the possibility of performing other activities related to the vehicle during a break, and forces drivers to have a rest, thereby they pose less risk on the roads.

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Scholz, André, Johannes Wendsche, Argang Ghadiri, Usha Singh, Theo Peters, and Stefan Schneider. "Methods in Experimental Work Break Research: A Scoping Review." International Journal of Environmental Research and Public Health 16, no. 20 (2019): 3844. http://dx.doi.org/10.3390/ijerph16203844.

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The number of studies on work breaks and the importance of this subject is growing rapidly, with research showing that work breaks increase employees’ wellbeing and performance and workplace safety. However, comparing the results of work break research is difficult since the study designs and methods are heterogeneous and there is no standard theoretical model for work breaks. Based on a systematic literature search, this scoping review included a total of 93 studies on experimental work break research conducted over the last 30 years. This scoping review provides a first structured evaluation regarding the underlying theoretical framework, the variables investigated, and the measurement methods applied. Studies using a combination of measurement methods from the categories “self-report measures,” “performance measures,” and “physiological measures” are most common and to be preferred in work break research. This overview supplies important information for ergonomics researchers allowing them to design work break studies with a more structured and stronger theory-based approach. A standard theoretical model for work breaks is needed in order to further increase the comparability of studies in the field of experimental work break research in the future.

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Mazlan, A. M., M. R. Sapiee, and M. S. Yahaya. "The Concept of Single Use Piston Break Safety Syringe." Applied Mechanics and Materials 761 (May 2015): 646–50. http://dx.doi.org/10.4028/www.scientific.net/amm.761.646.

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A syringe is a simple piston pump consisting of a plunger that fits tightly in a tube. The plunger can be pulled and pushed along inside a cylindrical tube (the barrel), allowing the syringe to take in and expel a liquid or gas through an orifice at the open end of the tube. The open end of the syringe may be fitted with a hypodermic needle, a nozzle, or tubing to help direct the flow into and out of the barrel. Syringes are often used to administer injections, apply compounds such as glue or lubricant, and measure liquids. The reuse and abuse of syringe has led to cross-infection of diseases; thus, the need of single use safety syringe arises. Single use safety syringe is able to prevent the abuse of syringe. Many inventions have been produced; the most common are through-push retract breakable safety syringe, rotary plunger retractable safety syringe and release-ring breakable safety syringe. A new type of single use safety syringe Piston Break Safety Syringe is discussed in this paper. The new Piston Break Safety Syringe has similar design with the widely used safety syringe; hence, it makes it easier to be adapted by the users due to its similarity, since no extra training is required. The cost should be equivalently low due to the similarity in size, design and number of components.

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., N. R. K. Patnaik. "SAFETY OF COASTAL STRUCTURE AS A BREAK WATER STRUCTURE." International Journal of Research in Engineering and Technology 04, no. 13 (2015): 53–55. http://dx.doi.org/10.15623/ijret.2015.0413009.

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Zorc, Borut, Aleš Nagode, Borut Kosec, and Ladislav Kosec. "Elevator chain wheel shaft break analysis." Case Studies in Engineering Failure Analysis 1, no. 2 (2013): 115–19. http://dx.doi.org/10.1016/j.csefa.2013.05.004.

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Sun, Lin, Xuesong Wang, Jun Wang, Meiru Liu, and Genglei Xia. "RELAP5 Foresight Thermal-Hydraulic Analysis of Hypothesis Passive Safety Injection System under LOCA for an Existing NPP in China." Science and Technology of Nuclear Installations 2020 (December 27, 2020): 1–14. http://dx.doi.org/10.1155/2020/8844910.

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Qinshan nuclear power plant is the first large Chinese-designed nuclear power station based on pressurized water reactor, and the second generation main stream active safety injection system is adopted for Qinshan nuclear power plant. In this paper, a novel passive safety injection system (PSIS) has been proposed for ocean-based Qinshan Phase One nuclear power plant to replace the original active one. The PSIS contains high-pressure, medium-pressure, and lower-pressure safety injection systems, and a two-stage automatic depressurization system. To evaluate the system performance, small-break LOCA has been investigated using RELAP5. Various break sizes and locations including 2-inch, 10-inch cold leg break, and double-ended direct vessel injection line break were analyzed. Key safety parameters such as safe injection mass flow rates, coolant level of the core, system pressure, and fuel cladding temperature were monitored during the accident process. The results illustrate that the performance of the safety injection system can guarantee the effective core cooling and submerged under different LOCA even with only half of the safety injection system, which can fulfill the single failure criteria. The thermal-hydraulic analysis for the Qinshan passive safety injection system is significant to master the related technologies for Chinese engineer and develop the Chinese-designed third-generation nuclear power plants, and the PSIS can guarantee the reactor submerged under LOCA even plus the station block out accident.

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Metcalfe, M. P., W. Koch, and G. Turner. "Break-up testing of waste-form materials." Mineralogical Magazine 76, no. 8 (2012): 2975–83. http://dx.doi.org/10.1180/minmag.2012.076.8.13.

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AbstractThe Nuclear Decommissioning Authority (NDA) is developing a safety case for the long-term management of higher activity wastes. This includes safety assessments of transport to and operations at the repository. One of the main faults and hazards to be considered is waste package response to impact accidents.The criteria of impact performance for waste packages are based upon activity release of particulates generated from the break up of the waste form during impact. The NDA approach to impact performance is based upon waste package response from finite element modelling in combination with break-up tests.Previous break up research commissioned by the NDA has concentrated on commercial graphite and glass samples. These extended studies, undertaken by the National Nuclear Laboratory in collaboration with the Department of Aerosol Technology of the Fraunhofer Institute of Toxicology and Experimental Medicine, provide break-up data specific to nuclear facilities and waste materials. These include archived unirrradiated graphite used to construct Magnox reactor cores and reflectors, simulant high level waste glass, selected grout formulations and selected metal-in-grout formulations.

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Khan, Abid Hossain, Angkush Kumar Ghosh, Md Sumon Rahman, S. M. Tazim Ahmed, and C. L. Karmakar. "An Investigation on the Possible Radioactive Contamination of Environment during a Steam-Line Break Accident in a VVER-1200 Nuclear Power Plant." Current World Environment 14, no. 2 (2019): 299–311. http://dx.doi.org/10.12944/cwe.14.2.14.

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In this work, the possibility of contamination of environment by radioactive elements due to a steam-line break accident has been investigated for a VVER-1200 type nuclear power plant. Personal Computer Transient Analyzer (PCTRAN) has been used to generate the response data of the plant safety systems numerically for an accidental condition like such. A break of 1000 cm2 in the A-loop of the steam line has been considered. A break of the size is considered a “Large Break”, which is believed to be responsible for multiple serious accidents in the past. Also, it has also been assumed that off-site AC power supply is unavailable. Simulations were run for time duration of 300 seconds since most of the safety features of the plant should respond within 50 seconds from the initiation of the accident. Results show that SCRAM is initiated within 22.5 seconds from the emergence of the break, which limited the peak core thermal power to around 105% of the nominal value. The peak temperatures of fuel elements and fuel cladding are recorded to be around 1850oC and 620oC respectively, which are both within the safety limits. The pressure inside reactor pressure vessel has not undergone any significant changes, showing no sign of failure. Again, the pressure inside the reactor containment building is kept within 2.5 bar by the safety systems, indicating that there is no possibility of containment failure due to over-pressure. Finally, the readings from radiation monitor show that there is no noticeable release of radioactive elements to the environment during the accident. Therefore, it may be concluded that the release of radioactive elements in the surrounding environment during a steam-line break accident is very unlikely provided that the plant safety systems are fully functional.

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Dissertationen zum Thema "Safety break"

Bhaduri, Sreyoshi. "Algorithm to enable intelligent rail break detection." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/78080.

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Wavelet intensity based algorithm developed previously at VirginiaTech has been furthered and paired with an SVM based classifier. The wavelet intensity algorithm acts as a feature extraction algorithm. The wavelet transform is an effective tool as it allows one to narrow down upon the transient, high frequency events and is able to tell their exact location in time. According to prior work done in the field of signal processing, the local regularities of a signal can be estimated using a Lipchitz exponent at each time step of the signal. The local Lipchitz exponent can then be used to generate the wavelet intensity factor values. For each vertical acceleration value, corresponding to a specific location on the track, we now have a corresponding intensity factor. The intensity factor corresponds to break-no break information and can now be used as a feature to classify the vertical acceleration as a fault or no fault. Support Vector Machines (SVM) is used for this binary classification task. SVM is chosen as it is a well-studied topic with efficient implementations available. SVM instead of hard threshold of the data is expected to do a better job of classification without increasing the complexity of the system appreciably. Master of Science

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Xing, Mian. "Validation of TRACE Code against ROSA/LSTF Test for SBLOCA of Pressure Vessel Upper-Head Small Break." Thesis, KTH, Kärnkraftsäkerhet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95745.

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OECD/NEA ROSA/LSTF project tests are performed on the Large Scale Test Facility (LSTF). LSTF is a full-height, full-pressure and 1/48 volumetrically-scaled two-loop system which aims to simulate Japanese Tsuruga-2 Westinghouse-type 4-loop PWR. ROSA-V Test 6-1 simulates a pressure vessel (PV) upper-head small break loss-of-coolant accident (SBLOCA) with a break size equivalent to 1.9% of the volumetrically scaled cross-sectional area of the reference PWR cold leg.The main objective of present thesis is to build a TRACE calculation model for simulating thermal hydraulic behaviors in LSTF and PV upper-head SBLOCA, so as to assess different modeling options and parameters of TRACE code. The results show that TRACE code well reproduce the complex physical phenomena involved in this type of SBLOCA scenarios. Almost all the events in the experiment are well predicted by the model based on TRACE code. In addition, the sensitivity of different models and parameters are investigated. For example, the code slightly overestimates the break mass flow from upper head which affects the accuracy of the results significantly. The rising of core exit temperature (CET) is significantly influenced by the flow area of leakage between downcomer and hot leg. Besides, the effect of the break location, low pressure injection system (LPIS) and accumulator setup are also studied.

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Janík, Vladimír. "Chytré čerpadlo na čerpání vody z nádrže." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442364.

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This thesis deals with the implementation of a system for measuring the amount of water in the tank using a 12V water pump. The whole system is controlled by the ESP32 microcontroller. The introduction deals with the theoretical analysis of various principles of measuring the level of liquids. The next part deals with the procedure of the construction of the measuring device and its theoretical analysis. The last part of the work deals with the control of the pump and the individual functions that provide this control. The ultrasonic distance sensor AJ-SR04M was chosen for the implementation of the device. The volume of water in the tank is calculated from its data. The ESP32 microcontroller provides system control via a web interface. The whole system was implemented and tested to measure the volume of water and its pumping in the IBC container.

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Carneiro, Samuel Ricardo Carvalho. "Caracterização mecânica e hidrogeológica dos maciços das cavas de Alegria Centro e Sul, Samarco Mineração S.A." Universidade Federal de Viçosa, 2013. http://locus.ufv.br/handle/123456789/3818.

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Made available in DSpace on 2015-03-26T13:28:28Z (GMT). No. of bitstreams: 1 texto completo.pdf: 9684635 bytes, checksum: 3491aec02ba187b7f125d21090d312b3 (MD5) Previous issue date: 2013-08-01 This paper presents a slope stability and groundwater flow analysis of rock masses of Alegria Centro and Alegria Sul pits, Samarco Mineração S.A., located in the Iron Quadrangle region, Minas Gerais State, Brazil. The main purpose was to characterize the mechanical properties - throughout GSI and RMR geomechanics classification methods, and hydrogeological characterization, of all rock and soil masses in the studied area, in order to produce data to support the preparation of a suitable pit design covering local particularities. This study included geological-geotechnical mapping, geotechnical drillhole logging, sampling of 45 undisturbed highly weathered block samples (classes V and VI) and drillhole core sampling. Physical and strength tests performed comprised geotechnical characterization tests, direct shear tests, uniaxial and triaxial strength tests and point load tests. To characterize the hydrogeological properties, in addition to the monitoring of groundwater level, field and laboratory experiments were carried out to determine the hydraulic conductivity and frequency fractures analyzes through the Cubic Law relation. In this study slope stability analyzes were performed by limit equilibrium and analyzes of flows by the finite element method, using the software SLIDE Rocscience Inc., with the determination of the critical safety factors before and after the drawdown. Este trabalho apresenta uma avaliação da estabilidade e do fluxo subterrâneo dos maciços das cavas de expansão da Samarco Mineração S.A., denominadas Alegria Centro e Sul, localizadas na região do Quadrilátero Ferrífero, Minas Gerais, Brasil. O principal objetivo foi realizar uma caracterização das propriedades mecânicas para as quais combinaram-se os métodos de classificação geomecânica RMR e GSI, e hidrogeológicas, dos maciços rochosos e solos existentes na área de estudo, de maneira a produzir dados que permitissem a elaboração de um projeto de cava adequado à essas características. Este estudo contou com mapeamento geológico-geotécnico, descrição geotécnica de testemunhos de sondagens rotativas, amostragem de 45 blocos indeformados de rochas de alto grau de alteração (classes V e VI) e amostragem de testemunhos de furos de sondagens. Para caracterização das propriedades de resistência foram realizados ensaios de caracterização física, ensaios de cisalhamento direto, ensaios de compressão uniaxial e triaxial e ensaios de resistência à compressão puntiforme. Para caracterização das propriedades hidrogeológicas, além do monitoramento do nível d água subterrânea, foram conduzidos ensaios para determinação da condutividade hidráulica em campo, em laboratório e análises de frequência de fraturas através da relação conhecida como Lei Cúbica. No presente estudo foram realizadas análises de estabilidades por equilíbrio limite e análises de fluxos pelo método de elementos finitos, utilizando o software SLIDE da Rocscience Inc., com a determinação dos fatores de segurança críticos antes e após o rebaixamento do nível d água.

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Ferla, Rute. "Metodologia simplificada para análise de aspectos hidráulicos em rompimento de barragens." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/180112.

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O início da construção de estruturas para reserva de água no mundo é conhecido há milhares de anos, e, desde então, as barragens são consideradas alternativas viáveis não apenas para reserva de água para consumo, mas também para as finalidades de geração de energia hidrelétrica, contenção de rejeitos, entre outras. Entretanto, mesmo com os contínuos avanços nas técnicas construtivas e na fiscalização da segurança destas estruturas, a possibilidade de rompimento de barragens é uma realidade constante. Nesta perspectiva, o presente texto objetiva analisar os aspectos hidráulicos de metodologias simplificadas para estimativa de parâmetros de inundação proveniente do rompimento de barragens, a saber, as vazões e respectivas profundidades atingidas no vale a jusante, em um evento de rompimento hipotético. Para tal, analisaram-se os resultados de três metodologias simplificadas existentes, aplicadas em três barragens estudo de caso, com características estruturais e geometria do vale a jusante distintas. Os resultados das metodologias simplificadas foram comparados com os estudos de Dam Break das três barragens estudo de caso, obtidos com o uso do software HEC-RAS unidimensional e cedidos por empreendedores. O presente texto também sugere uma nova equação empírica para previsão da vazão máxima resultante do rompimento de barragens por galgamento, e propõe uma nova metodologia simplificada para análise preliminar de rompimento de barragens, com base nos métodos analisados e nas respectivas conclusões obtidas. Os resultados indicam que o uso de metodologias simplificadas na análise preliminar de rompimento de barragens é uma alternativa viável em vales cuja declividade do talvegue é acentuada e cujas características geométricas são aproximadamente constantes. Identificou-se que pequenas alterações no coeficiente de rugosidade do terreno e na declividade da linha de energia refletiram em diferenças nos resultados de profundidades e larguras máximas de 20%, em média. A proposta de nova equação empírica para previsão de vazão máxima na seção da barragem baseou-se na análise de 39 casos reais envolvendo ruptura de barragens por galgamento e resultou em um coeficiente de determinação (R²) de 0,79. Quando comparada com as principais equações semelhantes indicadas na bibliografia, a equação proposta obteve vazões máximas próximas ou superiores às dos demais pesquisadores analisados sempre que a altura da barragem foi inferior a 30 m. Evidencia-se a importância na estimativa cautelosa da vazão máxima na seção da barragem, uma vez que essa reflete em diferenças significativas nas vazões e respectivas profundidades alcançadas ao longo do vale a jusante da estrutura. Nos casos analisados, diferentes vazões máximas na seção da barragem refletiram em distinções de até 50%, em média, nas profundidades e larguras máximas a jusante. A nova metodologia proposta para definição de características de inundação provenientes do rompimento de barragens pode contribuir em estudos preliminares para tal, especialmente aos empreendedores que possuem número expressivo de barragens. Nesses casos, a metodologia poderá nortear a prioridade a ser dada em estudos detalhados de Dam Break. For thousands of years, water reservoir structures have been built worldwide. Since then, dams have been considered viable alternatives not only for reserving water for consumption but also for the purposes of hydroelectric power generation and sediment retention, among others. Despite the continuous advances in the construction techniques and in the safety inspection of these structures, the possibility of breaking of dams remains a constant reality. Hence, this paper aims to analyze the hydraulic aspects of simplified methodologies for estimating flood parameters on dam ruptures, namely, the flows and respective depths reached in the downstream valley in a hypothetical breach event. Results of three existing simplified methodologies were studied applied in three dams with different structural characteristics and downstream valley geometry. The results of simplified methodologies were compared with dam break studies of three study case dams, obtained with one-dimensional HEC-RAS and provided by entrepreneurs. The present paper suggests also a new empirical equation for predicting the maximum flow resulting from the overtopping dam failure and proposes a new simplified methodology for preliminary analysis of dam rupture, based on the analyzed methods and respective obtained conclusions. The results indicate that the use of simplified methodologies in the preliminary dam break analysis is a viable alternative in valleys with high thalweg declivities and close to constant geometric characteristics. It was identified that small changes in the coefficient of rough terrain and in the energy line slope reflected in differences in the results of depths and maximum widths of 20%, on average. The proposed new empirical equation for maximum flow prediction in the dam section was based on the analysis of 39 actual cases involving overtopping dam failure and resulted in a coefficient of determination (R²) of 0.79. When compared to similar main equations indicated in the bibliography, the proposed equation obtained maximum flows near or higher than those of other researchers analyzed whenever the height of the dam did not exceed 30 m. The importance of a cautious estimation of the maximum flow rate in the dam section is to be highlighted, since it results in significant variations of flow and respective depths along the valley and downstream of the structure. Different maximum flows were found in the dam section, which reflected in distinctions of up to 50%, in average, in the maximum depths and widths downstream. The new proposed methodology for defining dam break characteristics caused by dam rupture may contribute to preliminary studies, especially to entrepreneurs who own a significant number of dams. In these cases, the methodology may guide the priority to be given in detailed studies of dam break.

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Marčiulionytė, Asta. "Įmonės pelno-išlaidų-veiklos apimties vertinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20140626_161708-33077.

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Pelningumo siekimas yra pagrindinis verslo įmonės tikslas, dažnai lemiantis vadovų pasirinkimą sprendžiant problemas susijusias su pardavimo kainomis, įvairiomis išlaidomis. Pelno-išlaidų-veiklos apimties vertinimas teikia apibendrinantį planavimo proceso vaizdą ir išlaidų kitimo supratimą, todėl gauta informacija yra nepakeičiama, siekiant užtikrinti racionalų įmonės valdymą. Šio darbo tikslas – išanalizavus pelno-išlaidų-veiklos apimties metodologiją, atlikti įmonės pelno-išlaidų-veiklos apimties vertinimą ir sudaryti modelį, leidžiantį efektyviai planuoti ir analizuoti įmonės kaštų, veiklos apimties ir pelno ryšį. Taigi, šio darbo objektas-įmonės pelningumas, jo priklausomybė nuo įmonės pajamų, kaštų ir veiklos apimties. Siekiant įgyvendinti darbo tikslą, keliami tokie uždaviniai: išanalizuoti pelno-išlaidų-veiklos apimties vertinimo metodologiją, suformuoti prielaidas pelno-išlaidų-veiklos apimties vertinimo modeliavimui, atlikti įmonės pelno-išlaidų-veiklos apimties vertinimą, bei sudaryti pelno-išlaidų-veiklos apimties vertinimo modelį. Darbą sudaro trys pagrindinės dalys: metodologinė, analitinė ir rezultatų. Pirmojoje darbo dalyje nagrinėjami pelno-išlaidų-veiklos apimties vertinimo metodologijos aspektai-pateikiamos analizės prielaidos, vertinimo reikšmė ir galimybės. Antrasis darbo skyrius apima prielaidų pelno-išlaidų-veiklos apimties vertinimo modeliavimui analizę: tiriami ir lyginami pelno-išlaidų-veiklos apimties vertinimo modeliavimo metodai, bei pateikiama... [toliau žr. visą tekstą] The main purpose of business enterprise is striving for profitability and this purpose usually decides the head‘s of enterprise choice when he tackles the problems about prices of sales and different expenses. Cost-volume-profit evaluation gives resumptive view about planning process and understanding of costs range so given information is irreplaceable because of trying to ensure rational management. The purpose of this work is to do cost-volume-profit evaluation and make a model according the analysis of cost-volume-profit methodology. This model will let to plan and analyse enterprise‘s cost, activity‘s size and profit‘s relation in effective way. So the object of this work is the profitability of an enterprise, its dependence from enterprises revenue, cost and activity‘s volume. In purpose to realize work‘s aim there are these objectives: to analyse cost-volume-profit evaluation methodology, to structure presumptions for cost-volume-profit evaluation modeling, to do enterprises cost-volume-profit evaluation and to make cost-volume-profit evaluation model. Three main parts makes this work: methodological, analytical, results. In the first part of this work there is an analyses of cost-volume-profit evaluation methodology‘s aspects, there are analysis presumptions, evaluations mean and possibilities. The second part includes presumptions analysis to cost-volume-profit evaluation modeling: here are researched and compared cost-volume-profit evaluation modeling methods and is... [to full text]

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Koy, Rebaz. "Lactic acid bacteria as bio-preservatives in bakery : role of sourdough systems in the quality, safety and shelf life of bread." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9828.

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Microbial contamination and survival during storage of bread are a cause of both health concerns and economic losses. Traditional fermentation systems were studied as sources of lactic acid bacteria (LAB) with antagonistic potential against foodborne pathogens and spoilage organisms, with the aim to improve the safety and shelf life of bakery products. The antagonistic activity of four types of buttermilk (BM) products fermented with Lactococcus lactis subsp. lactis was evaluated against a number of pathogenic bacteria to select the best fermented-BM for application as bio-preservatives in bread crumpets, showing up to 9 µg/ml of nisin equivalent antimicrobial activity. These food ingredients could be suitable to be used in crumpet formulations, BM fermented with Lc. lactis subsp. lactis and nisin influenced the quality and shelf life of crumpets; the pH value and firmness of products with fermented BM was lower and the acidity and springiness was higher than for unfermented BM treatment and control withouth additive. The nisin and fermented BM treatment had beneficial effects on the pore size and colour in comparison with the control, and improved microbial shelf life by 2 days. Commercial and traditional sourdough and bread samples (n=18) were collected to assess the diversity of LAB strains and potential properties when applied to dough and bread. DGGE followed by sequencing showed that Lactobacillus was the predominant genus in the studied sourdoughs. Lb. plantarum and Lb. brevis strains accounted for 69% of the 32 isolates, out of which 10 were amylolytic and 12 had proteolytic activity. Most were also good acid producers after 24 h at 30°C. Some LAB strains presented a strong in vitro inhibitory activity against five indicator strains, showing potential as starter cultures to ferment sourdough. In subsequent experiments, the properties of 24 sourdoughs were evaluated, and one of them, fermented with Lb. plantarum (SIN3) yielded low pH value, high lactic acid production, and suitable microbial growth, and was selected for further bread making performance trials. The bread with fast fermentation and high sourdough concentration (FFHSD) had a lower pH, higher acidity and increased the quality attributes with significantly better shelf life comparing to the other treatments during the storage period. Sensory evaluation demonstrated that fast-fermented breads were more acceptable than the slow-fermented counterparts. Bread prepared with high level (18%) of sourdough fast-fermented with the selected culture (SIN3) had a good eating quality and shelf life. The approach of this study is likely to yield feasible improvements of the current methods of preparation of baking goods.

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Ndaki, Ntombikayise. "Investigation of the effect of short duration breaks in delaying the onset of performance related fatigue during long distance monotonous driving at different times of the day." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1016353.

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Road traffic accidents are a serious burden to the health systems of many countries especially in South Africa. Research aimed at reducing traffic related accidents is of importance as traffic crashes are rated as the second leading cause of fatalities in South Africa and ninth in the world. Despite the extensive efforts into research and development of new technology, driver fatigue still remains a cause of vehicle accidents worldwide. Fatigue plays a role in up to 20% of vehicle accidents with many being serious or fatal. Numerous coping behaviours are employed by drivers to counteract the negative effects of fatigue. The most common coping behaviours include taking short naps, talking to passengers, listening to the radio, opening windows and drinking stimulants. Driving breaks have long been identified as an effective countermeasure against fatigue. Most research done in driving breaks has investigated the duration of the breaks, activity undertaken during the break and the frequency of the breaks taken outside the vehicle. However limited literature is available on the effectiveness of breaks in counteracting the effects of fatigue. The objective of the current study was aimed at assessing whether short duration breaks are an effective countermeasure against fatigue. Physiological, neurophysiological, subjective and performance measures were used as indicators for fatigue. Additional focus of the research was determining whether breaks were more or less effective at counteracting the effects of fatigue at different times of day. Twelve participants were recruited for the study, six males and six females. The participants were required to perform a driving task on a simulator for 90 minutes. The study consisted of four independent conditions, namely driving during the day with breaks, driving during the day without breaks, driving during the night with breaks and driving during the night without breaks. The without breaks conditions were similar except that they occurred at different times of the day, one session at night and the other session during day time, as was the case for the conditions with breaks. The driving task used in the current study was a low fidelity simulator tracking task. The participants were required to follow a centre line displayed on a tracking path as accurately as possible. The measurements that were recorded in this study included physiological, performance, subjective and neurophysiological. Physiological measures included heart rate and heart rate variability (frequency domain) and core body temperature. The ascending threshold of the critical flicker fusion frequency was the only neurophysiological measurement included in the current investigation. Performance was quantified by mean deviation from a centre line participants were meant to track. Two rating scales were used: Karolinska sleepiness scale and the Wits sleepiness scale were used for the measurement of subjective sleepiness. Heart rate, heart rate variability and mean deviation were measured continuously throughout the 90 minute driving task. Critical flicker fusion frequency, temperature and the subjective scales were measured before and after the 90 minute driving task. The results indicated that the short duration breaks during day time had a positive effect on driving performance; however the breaks at night had a negative effect on driving performance. Heart rate was higher during the day compared to night time and the heart rate variability high frequency spectrum values were lower during the day condition, to show the activation of the sympathetic nervous system which is characteristic of day time. The night conditions had lower heart rate values and higher heart rate variability high frequency values, which show the activation of the parasympathetic nervous system which is dominant during periods of fatigue and night time. Subjective sleepiness levels were also higher at night compared to day time.

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Oplatková, Hana. "Žiju tarot." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2012. http://www.nusl.cz/ntk/nusl-232344.

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Private deck of cards created during six-month survey and documentation of daily experiences. The package contains 49 cards and it is inspired by a set of 78 tarot cards. Text content - reverse side of the card was created using diary notes. Face side of the card was chosen as a representation of processes taking place usually in days when the card was read.

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CRO, PAOLO. "Gestione del rapporto di lavoro e intervento pubblico nel sistema giuslavoristico." Doctoral thesis, Università Cattolica del Sacro Cuore, 2007. http://hdl.handle.net/10280/95.

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L'opera esamina l'intervento pubblico nella gestione del rapporto di lavoro sotto il profilo storico e giuridico nelle tre fasi d'instaurazione, gestione e cessazione del rapporto. Si valorizza anche il ruolo specifico dei tre poteri legislativo, esecutivo e giudiziario, con particolare riguardo all'analisi sistematica del diritto amministrativo del lavoro. L'opera intende porre in luce gli elementi logici, giuridici ed assiologici di questo ramo del diritto del lavoro, per ricondurne le fattispecie esaminate ad un sistema coerente e razionale e per suggerirne sia un metodo d'analisi de iure condito sia una prospettiva per una lettura ed una proposta de iure condendo. This work analyses how public powers affects labour relationships both from the historical and the juridical points of view. The three main phases of labour relationships beginning, management and end are examined separately. The specific contributions by the three public powers legislative, administrative and judiciary especially by the public administration, are also dealt with. The goal is to illustrate the logical, juridical and ethical elements of this branch of the labour law, in order to build a rational system for both the analysis de iure condito and the debate de iure condendo.

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Bücher zum Thema "Safety break"

Mani, Pankaj. Dam break study of Myntdu Leska Dam using DAMBRK model. National Institute of Hydrology, 2001.

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CADAM, Meeting (1998 Wallingford England). Proceedings of the CADAM meeting, Wallingford, United Kingdom: Concerted action on dam-break modelling, 2 and 3 March 1998. European Commission, Directorate-General Research, 1999.

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Güntay, Salih. RELAP5/MOD2 assessment, OECD-LOFT small break experiment LP-SB-03. Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1990.

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Guntay, S. RELAP5/MOD2 assessment, OECD-LOFT small break experiment LP-SB-03. Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1990.

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Güntay, Salih. RELAP5/MOD2 assessment, OECD-LOFT small break experiment LP-SB-03. Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1990.

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Buser, Richard P. The breakaway timber utility pole, a survivable alternative: The Massachusetts experience : summary report. Federal Highway Administration, Office of Technology Applications, 1993.

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Void where prohibited revisited: The trickle-down effect of OSHA's at-will bathroom-break regulation. Fănpìhuà Press, 2003.

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Basdekas, D. Regulatory analysis for the resolution of Generic issue 125.II.7, "Reevaluate provision to automatically isolate feedwater from steam generator during a line break". Division of Safety Issue Resolution, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1988.

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Duerden, Bruce. Don't Break a Leg!: A Manual for Theatre Safety. Encore Performance Publishing, 1996.

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United States. National Weather Service. Office of Climate, Water, and Weather Services., ed. Rip currents!: Break the grip of the rip. NOAA's National Weather Service, Office of Climate, Water, and Weather Services, 2007.

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Buchteile zum Thema "Safety break"

Jovanović, A., D. Sturm, and M. Hassler. "Development of an Expert System for Leak-Before-Break Analysis." In Expert Systems in Structural Safety Assessment. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-83991-7_14.

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Choi, Baek Gyu, Hee Hak Ahn, Hong Tae Kim, et al. "A Study on Break-Away Bolt Design for a Marine Safety Break-Away Coupling Based on Elastic Stress Analysis." In AETA 2016: Recent Advances in Electrical Engineering and Related Sciences. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-50904-4_56.

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Aubron, Matthieu. "KTM Functional Safety Environment – Break Silos, Ensure Full Traceability, Modularity and Automate Reporting." In Communications in Computer and Information Science. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-24647-5_27.

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Gerardo-Rodríguez, Jesús Enrique, Benjamín Ramírez-Wong, Patricia Isabel Torres-Chávez, et al. "Dough Viscoelasticity of the Bread-Making Process Using Dynamic Oscillation Method: A Review." In Food Product Optimization for Quality and Safety Control. Apple Academic Press, 2020. http://dx.doi.org/10.1201/9781003003144-15.

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Saska, T., J. Novak, F. Kratochvil, and R. Sousek. "High-pressure pipeline break risk assessment." In Advances in Safety, Reliability and Risk Management. CRC Press, 2011. http://dx.doi.org/10.1201/b11433-187.

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Ermolieva, T., M. Makowski, G. Fischer, and Y. Ermoliev. "Economic evaluation of dams for flood protection: an integrated safety approach." In Dam-Break Problems, Solutions and Case Studies. WIT Press, 2009. http://dx.doi.org/10.2495/978-1-84564-142-9/07.

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Compare, M., L. Legnani, M. Buldrini, G. Sansavini, E. Zio, and L. Beretta. "Risk assessment of a bulk cryogenic tank: Beyond the Leak-Before-Break criterion." In Safety and Reliability: Methodology and Applications. CRC Press, 2014. http://dx.doi.org/10.1201/b17399-324.

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Poghosyan, S., G. Kanetsyan, A. Amirjanyan, J. Ramsey, and P. Kohut. "Application of WinPRAISE code for secondary side piping break frequency assessment in PSA." In Safety and Reliability of Complex Engineered Systems. CRC Press, 2015. http://dx.doi.org/10.1201/b19094-74.

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Spuler, T., and G. Moor. "Renewal of small movement expansion joints with minimum break-out and time requirements." In Bridge Maintenance, Safety, Management, Resilience and Sustainability. CRC Press, 2012. http://dx.doi.org/10.1201/b12352-577.

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Kim, Mimi E. "The Coupling and Decoupling of Safety and Crime Control." In The Politicization of Safety. NYU Press, 2019. http://dx.doi.org/10.18574/nyu/9781479805648.003.0002.

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In the past several years, the U.S. feminist anti-violence social movement’s reliance on criminalization has weakened under the weight of mounting criticism of what is now known as “carceral feminism.” This recent shift towards the consideration of explicitly anti-carceral practices and policies within the mainstream feminist anti-violence movement signals a significant break in what has been a steady progression toward a solid pro-criminalization stance since the 1970s. This Chapter provides a timeline outlining some key moments contributing to the pro-criminalization position of the anti-domestic violence movement as well as countervailing events and initiatives that have constructed an anti-carceral alternative. The timeline demonstrates that the anti-carceral turn that is now redefining the mainstream movement is the result of two decades of resistance and counter-hegemonic movement building led primarily by women, gender non-conforming, and trans people of color.

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Konferenzberichte zum Thema "Safety break"

Gonzalez-Cadelo, J., C. Queral, and J. Montero-Mayorga. "Effects of Break Location and Time Uncertainties in Small-Break and Medium-Break LOCA Sequences With Unavailability of HPSI." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16348.

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The Integrated Safety Assessment (ISA) methodology, developed by the Spanish Nuclear Regulatory Body, consists of a dynamic methodology of probabilistic safety assessment. It has been applied to a thermal-hydraulic analysis of small-break and medium-break LOCA sequences without HPSI, for different break locations, in a three-loop PWR. ISA methodology allows to obtain the damage domain, defined as the region of the space of uncertain parameters where the damage condition is exceeded, for each sequence of interest. In this work, damage domain relates two uncertain parameters (starting time of secondary-side depressurization and break size) to damage exceedance condition (PCT > 1477 K). Several damage domains have been obtained, each one for each break location of interest (cold leg, hot leg, vessel upper head and vessel lower head). Simulations have been performed with TRACE v5.0 patch 1 code, and the results show the capability and convenience of ISA methodology, in order to obtain accurate results that take into account time uncertainties.

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Li, Linsen, Feng Shen, Mian Xing, Zhan Liu, and Zhanfei Qi. "Preliminary Safety Analysis of a Compact Small Reactor: Feedwater Line Break and Small-Break LOCA Accident Analysis." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66664.

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A small Pressurized Water Reactor (PWR) with compact primary system and passive safety feature, which is called Compact Small Reactor (CSR), is under pre-conceptual design and development. For the purpose of preliminary assessment of the primary coolant system and capability evaluation of the passive safety system, a detailed thermal-hydraulic (T-H) system model of the CSR was developed. Several design-basis accidents, including feedwater line break, double ended direct vessel injection line break (one of the small-break Loss Of Coolant Accidents, LOCA) and etc, are selected and simulated so as to evaluate and further optimize the design of passive safety systems, especially the passive core cooling system. The results of preliminary accident analysis show that the passive safety systems are basically capable of mitigating the accidents and protecting the reactor core from severe damage. Further research will be focused on the optimization of pre-conceptual design of the thermal-hydraulic system and the passive core cooling system.

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Belgrano, Giovanni, and Luke McEwen. "Working Load To Break Load: Safety Factors In Composite Yacht Structures." In High Performance Yacht Design Conference. RINA, 2002. http://dx.doi.org/10.3940/rina.ya.2002.32.

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Guan, Huaiguang, and Peng Yang. "Advance in Artificial Intelligence Method Safety on Warning of Tailings Dam Break." In CIPAE 2020: 2020 International Conference on Computers, Information Processing and Advanced Education. ACM, 2020. http://dx.doi.org/10.1145/3419635.3419711.

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Stefanini, L., and F. J. Blom. "Probabilistic Leak Before Break." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84056.

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In this study a probabilistic Leak-Before-Break (LBB) analysis was carried out based on the R6 FAD Option 1 assessment method. The method uses the material fracture toughness and yield stress in order to determine, deterministically, a Critical Crack Length (CCL) and a Leakage Rate (LR) through a crack. In order to define the fracture toughness of the material, the Master Curve approach was used accordingly to BS7910:2013 Annex J. Initially, deterministic analyses were carried out and the fracture toughness and yield stress were set to 190 MPa√m and 158 MPa, respectively. In order to implement a probabilistic approach, the yield stress and fracture toughness were introduced as stochastic parameter. The Fracture toughness was generated using a Weibull distribution to match the Master Curve. The distribution was built such that 190 MPa√m represents the 5% probability fracture toughness. The Yield stress (0.2% proof strength) was generated using a normal distribution with standard deviation 10.35 MPa such that the average value was 175 MPa and the lower bound (5% of probability of occurrence) was 158 MPa. The choice of building the distribution as above mentioned was justified by the fact that in structural integrity assessment the lower 5% is generally used for material parameters. Thus, once a Detectable Leakage Rate (DLR) was determined, it was possible to assign an implicit probability of failure to the deterministic case. The calculations were then extended by using several LR formulas. The calculations were carried out making use of the probabilistic software RAP++ coupled to MATLAB. The probabilities of failure were calculated with regard to a postulated DLR and a DLRSF corrected with a safety factor of 10. The probabilities of failure for the DLRSF were proved to be 9 to 15 times higher than for the postulated DLR case, which leads to the opportunity of conservatism reduction.

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Hou, Xiuqun, Danmei Xie, Lin Cai, Peng Zhang, and Jie Tan. "LOCA Simulations of AP1000 With Different Breaks Based on RELAP5." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60329.

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One of design features of AP1000 is its passive safety system. As the newly designed system, the performance of AP1000 under severe accidents causes a lot of concerns. To prevent or minimize being uncovered of the core fuel during LOCAs, many researchers have devoted themselves to simulate LOCAs. In this paper, based on RELAP5, the model of AP1000 was established and validated. LOCA simulations of AP1000 with different breaks were conducted, including LOCAs both on cold leg and hot leg with the break size of 0.1 ft2 and LOCAs with different break size as 0.01%, 0.1%, 1%, 10%, 20%, 40%, 50% of the cold leg cross section area on cold leg. The result indicates that, for AP1000, LOCA on cold leg is more critical, and the system shows great safety performance under LOCAs with different break sizes on cold leg, especially for LOCA with middle break size because the core decay heat is fully removed by coolant and the cladding temperature decreases soon once the accident happens during the process. The result also reveals that, during the process, the core decay heat is mainly removed by the discharge coolant for large break LOCA, but mainly removed by PRHR HX for small break LOCA.

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Mizuno, Yuko O., Katsunori Ogura, Hisashi Ninokata, and Lawrence E. Conway. "Preliminary Probabilistic Safety Assessment of the IRIS Plant." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22095.

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A preliminary level-1 probabilistic safety assessment of the IRIS plant has been performed. The first focus is on five internal initiating events, such as primary system break (loss-of-coolant accident and steam generator tube rupture) and transients (secondary system line break and loss-of-off-site power). In this study, the event tree for each initiating event was developed and the fault tree analysis of the event tree headings was carried out. In particular, since one of the IRIS safety systems, the passive emergency heat removal system, is unique to the IRIS plant and its reliability is key to the core damage frequency evaluation, it received more extensive fault-tree development. Finally the dominant sequences that lead to severe accidents and the failures in the main and support systems are identified.

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Pottorf, J., and S. M. Bajorek. "Large Break LOCA Safety Injection Sensitivity for a CE/ABB System 80+ PWR." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22519.

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A WCOBRA/TRAC model of an evolutionary pressurized water reactor with direct vessel injection was constructed using publicly available information and a hypothetical double-ended guillotine break of a cold leg pipe was simulated. The model is an approximation of a ABB/Combustion Engineering System 80+ pressurized water reactor (PWR). WCOBRA/TRAC is the thermal-hydraulics code approved by the U.S. Nuclear Regulatory Commission for use in realistic large break LOCA analyses of Westinghouse 3- and 4-loop PWRs and the AP600 passive design. The AP600 design uses direct vessel injection, and the applicability of WCOBRA/TRAC to such designs is supported by comparisons to appropriate test data. This study extends the application of WCOBRA/TRAC to the investigation of the predicted behavior of direct vessel injection in an evolutionary design. A series of large break LOCA simulations were performed assuming a core power of 3914 MWt, and Technical Specification limits of 2.5 on total peaking factor and 1.7 on hot channel enthalpy rise factor. Two cladding temperature peaks were predicted during reflood, one following bottom of core recovery and a second caused by saturated boiling of water in the downcomer. This behavior is consistent with prior WCOBRA/TRAC calculations for some Westinghouse PWRs. The simulation results are described, and the sensitivity to failure assumptions for the safety injection system is presented.

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Brickman, Dennis B. "On the Safety of Consumer Deep Fryers." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42633.

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A 27 month old boy sustained burn injuries from a consumer electric cooker which was pulled off a kitchen countertop. Approaches utilized in the safety analysis include accident reconstruction, critical accident statistics analysis, UL 1083 standard research, and an evaluation of design alternatives. This paper investigates the safety implications of the new UL required break-away power cord for electric cookers/deep fryers.

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Groudev, P., A. Stefanova, and R. Gencheva. "Assessment of VVER 1000 Core Degradation for Spectrum of Large Break Sizes Along with SBO." In Proceedings of the 29th European Safety and Reliability Conference (ESREL). Research Publishing Services, 2019. http://dx.doi.org/10.3850/978-981-11-2724-3_0434-cd.

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Berichte der Organisationen zum Thema "Safety break"

Vryashkova, Petya Ivanova, and Pavlin Petkov Groudev. Investigation of a Steam Line Break Accident in Respect of the Critical Safety Function “Subcriticality”. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, 2020. http://dx.doi.org/10.7546/crabs.2020.10.04.

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