Relevant bibliographies by topics / Supplies

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Supplies'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 March 2023

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Journal articles on the topic "Supplies"

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Li, Ai Min, Guo Qing Wang, and Jing Jing Zhang. "The Research on Railway Construction Project Materials Supplier Selection Model." Advanced Materials Research 919-921 (April 2014): 1503–8. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.1503.

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In recent years railway constructions are attracted many large investments, and generally 60-70% percentage of project budget are cost in the materials supplies, which are the main concern of the railway construction projects cost control. In this paper, we do some researches on suppliers choice to investigate the logic of railway construction projects supplies cost control. The structure is firstly to build the indicators of general construction project materials supplier selection, then to find criterion of general construction project materials supplier selection, and thirdly considering the projects distinctiveness to select the line with the actual situation of railway projects suppliers indicators. At last combined all the results of front researches to construct an indicator system for railway construction project materials supplier selection, and further study the supplier selection methods which are based on the indicator system and verified by an example.
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Boniface, Rainer, and Karanja Ngugi. "Procurement Practices and Quality of Food Supplies in Secondary Schools: A Case of Nairobi County, Kenya." Journal of Procurement & Supply Chain 6, no. 1 (October 12, 2022): 83–105. http://dx.doi.org/10.53819/81018102t6034.

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This research aimed at determining Procurement Practices on Quality of Food Supplies in Secondary Schools in Nairobi County. Quality of food supplies is a global issue that this study wishes to respond to in Kenyan Secondary schools of Nairobi County. The research was guided by the following objectives: first, to investigate the relationship between e-Procurement and quality of food supplies in secondary schools in Nairobi County. Secondly, to assess the influence of supplier relationship management between suppliers and schools on quality of food supplies. Thirdly, to establish how procurement planning affect quality of food supplies and finally, to evaluate how risk management practices influence quality of food supplies in secondary schools, Nairobi County. The research used mixed method convergent parallel design. This study used total quality management theory and agency theory. The research used mixed method convergent parallel design. The researcher preferred this design since it was used to collect both qualitative and quantitative data, and it provided a better understanding of the research problem as well as build on the strengths of both qualitative and quantitative data. The study adopted a census technique since the population was small. The target population was 32 secondary schools. The study sample was 96 respondents including 32 principals, 32 procurement officers and 32 storekeepers sampled from 32 secondary schools Nairobi County. Data collection was done through interview schedules and questionnaires. Quantitative data was analyzed descriptively through the distribution of frequencies, which have been expressed in means and percentages. The results were achieved using the Statistical Package for Social Sciences (SPSS) program and presented in tables and graphs, while qualitative data was transcribed and translated into themes that support the quantitative findings through a content analysis approach. In its findings, the study revealed that e-Procurement, supplier relationship management, procurement planning, and risk management practices significantly influence quality of food supplies. The study has therefore recommended that in order to enhance quality of food supplies, schools should fully make use of e-procurement, which include e-sourcing, e-tendering and e-advertisement. In addition, there should be proper management of suppliers to ensure that they supply on time and provide quality food supplies. The procurement planning processes should be adhered to in order to ensure that no part of the process is skipped. The risks faced on procurement should be documented and minimized of eliminated. All these will ensure an efficient procurement process. Keywords: E-Procurement, Inspection, Procurement Practices, Quality, Supplier relationship
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Rendahl, Pernilla. "Imposing EU VAT on Unlawful Digital Supplies?" EC Tax Review 20, Issue 4 (August 1, 2011): 192–202. http://dx.doi.org/10.54648/ecta2011022.

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This article discusses if EU value added tax (VAT) can be imposed on unlawful digital supplies by evaluating applicable criteria developed by the Court of Justice (COJ). Unlawful digital supplies are delimited to cover trade with digital materials that are copyright protected and exchanged through peer-to-peer networks without the permission of the copyright holder. The criteria that are evaluated for imposing EU VAT on these unlawful supplies covers the scope of VAT, whether the supplies can be seen as consumption, identification of the taxable supplier and if the supplies can be considered as taxable. The main difficulties with deciding if EU VAT can be imposed on unlawful digital supplies is in the argumentation used by the COJ in primarily two cases. The difficulties are, first, based on the Hong Kong Trade case, where the COJ interprets the scope of economic activity as not covering services supplied free of charge. Second, in the Tolsma case, the COJ discusses the need of a direct link establishing if there is a taxable transaction. For imposing EU VAT on unlawful digital supplies, the market place connecting the users and the organization providing the market place can rather be considered as an indirect link than a direct link establishing a legal relationship.
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Chen, Jiayu, Anyan Qi, and Milind Dawande. "Supplier Centrality and Auditing Priority in Socially Responsible Supply Chains." Manufacturing & Service Operations Management 22, no. 6 (November 2020): 1199–214. http://dx.doi.org/10.1287/msom.2019.0790.

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Problem definition: A key question in socially responsible supply networks is as follows: When firms audit some, but not all, of their respective suppliers, how do the degree centralities of the suppliers (i.e., the number of firms to which they supply) affect their auditing priority from the viewpoint of the firms? To investigate, we consider an assembly network consisting of two firms and three suppliers; each firm has one independent supplier that uniquely supplies to that firm and one common supplier that supplies to both. Academic/practical relevance: Most supply networks are characterized by firms that source from multiple suppliers and suppliers that serve multiple firms, thus resulting in suppliers who differ in their degree centrality. In such networks, any negative publicity from suppliers’ noncompliance with socially responsible practices—for example, employment of child labor, unsafe working conditions, and excessive pollution—can significantly damage the reputation of the buying firms. To mitigate this impact, firms preemptively audit suppliers although resource and time considerations typically restrict the number of suppliers a firm can audit. Consequently, it becomes important to understand the impact of the degree centralities of the suppliers on the priority with which firms audit them. Methodology: Game-theoretic analysis. Results: Downstream competition between the firms drives them away from auditing the supplier with higher centrality, that is, the common supplier, in equilibrium, despite the fact that auditing this supplier is better for the aggregate profit of the firms. We show that this inefficiency is corrected when the firms cooperate (via a stable coalition) to jointly audit the suppliers and share the auditing cost in a fair manner. We also identify conditions under which joint auditing improves social welfare. Managerial implications: We have two main messages: (i) individual incentives can lead firms to deprioritize the auditing of structurally important suppliers, which is inefficient; (ii) the practice of joint auditing can correct this inefficiency.
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Rezaei, Jafar, and Hamidreza Fallah Lajimi. "Segmenting supplies and suppliers: bringing together the purchasing portfolio matrix and the supplier potential matrix." International Journal of Logistics Research and Applications 22, no. 4 (October 16, 2018): 419–36. http://dx.doi.org/10.1080/13675567.2018.1535649.

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Liu, Jia, and Kefan Xie. "Emergency supplies requisition negotiation principle of government in disasters." Kybernetes 45, no. 8 (September 5, 2016): 1174–93. http://dx.doi.org/10.1108/k-07-2015-0192.

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Purpose When disasters occur, the Chinese national or local government and their relevant departments (hereinafter referred to as the government) probably need to acquire emergency supplies from suppliers. Before concluding a transaction, the public officials usually negotiate the quality and price of the emergency supplies with the suppliers. They expect to achieve the best relief effect while the suppliers want to maximize their own interests. Therefore, in order to help the government acquire inexpensive emergency supplies with high quality in a short time, the purpose of this paper is to examine the negotiation process and proposes a negotiation principle for the staff. Design/methodology/approach This paper first elaborates the characteristics and impact factors of emergency supplies requisition negotiation. Then it establishes a model describing the negotiation on price and quality of emergency supplies between the public officials and suppliers. Afterwards, it proposes an algorithm which can estimate the success rate of the negotiation. Finally, the paper employs the conclusion of the model and algorithm to analyze the emergency supplies requisition negotiation process during the China Lushan earthquake. Findings This paper proposes a “WRAD” principle of emergency supplies requisition negotiation of public officials in disasters. First, they should ensure the requisition price is not too low. Second, they would widen the difference between the high price and low price. Third, it is best for them to follow the principle of “ascending negotiation and descending choice” while selecting multiple suppliers to negotiate. Originality/value This paper establishes a model to study the emergency supplies requisition negotiation process between the public officials and suppliers based on evolutionary game theory. The model assumes that both the public officials and suppliers are not fully rational individuals, and they need time to consult with each other to find out the optimal solution. This paper proposes an innovative action principle of the public officials during the negotiation process which can help it to acquire inexpensive, high-quality, emergency supplies within a short period from the suppliers.
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Iskandar, Adi Panca Saputra, Kheri Arionadi Shobirin, and Komang Oka Saputra. "Analysis of Shopping Cart At Drugs Store By Using An Apriori Algorithm." International Journal of Engineering and Emerging Technology 2, no. 1 (September 23, 2017): 97. http://dx.doi.org/10.24843/ijeet.2017.v02.i01.p20.

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Competition in the business world in the pharmacy industry, demands the Pharmacist to determine a strategy that can increase drug sales. One way is to overcome the problems that occur in drugs store such as problems and sales of drug recommendations to suppliers who still use the prediction system of pharmacists. Data growth is less so utilized, data and information become useless like waste, sales strategy only as a little assumption without information and knowledge in server, consequently sales down and not range and items become expired and stock procurement is not according to market demand. Extracting data or an effort to retrieve valuable knowladge and information in a large database is called data mining or Knowledge Discovery in Database or usually shortened as KDD . One of the most popular algorithm in data mining technic is Apriori Algorithm, while the discovery of “relational combination pattertn among itemset used Assosiation Rules”. Data mining has been implemented into the various fields like : business or trade, education and telecommunication. In bussiness for instance, the implementation result of data mining use ‘algorithm Apriori which can give a hand to help the Businessmen make decision on supplies. For example, the necessity of supplies system in a drugstore as one of the mecical stuff supplier, and to determine which product as the priority should be supplied to anticipate out of stock of supplies availability in the store, as the results will also affect to the consumer service and daily income. Drugs are essential unit should be supplied and being and essential factor which will impact to the consumer trust to a hospital or another medical service. That is why the availability of medical drugs in drugstores is completely needed to support the succes of distribution to the consumers, so the activity of medical service to consumers run thoroughly. In this case, data mining is seen as able to buildt intelligent business environment as solution for competing increated compitition among the drugstores in future.
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Kwon, Ik-Whan, and Sung-Ho Kim. "Framework for successful supply chain implementation in healthcare area from provider’s prospective." Asia Pacific Journal of Innovation and Entrepreneurship 12, no. 2 (August 13, 2018): 135–45. http://dx.doi.org/10.1108/apjie-04-2018-0024.

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Purpose This paper aims to explore avenue where suppliers and manufacturers are aligned with health-care providers to improve supply chain visibility. Supply chain finance is explored to link suppliers/manufacturers with health-care providers. Design/methodology/approach Existing literature on supply chain visibility in health care forms a basis to achieve the study purpose. Alignment calls also for financial health where supply chain partners’ working capital is readily available to execute joint supply chain plan. Findings There is a disjoint in supply chain alliance between suppliers/manufacturers and providers where providers are unable to trace the origin of supplies. Quality care suffers and cost of care rises as providers search for supplies on an emergency basis. This paper provides a framework where solution can be formulated. Research limitations/implications Suppliers/manufactures form a direct strategic alliance with providers where product visibility enables health-care providers with a better patient management with lower cost of supplies. Inventory management and logistics cost will be lowered as better planning/forecasting is in place. This paper does not call for testing any hypothesis. Perhaps, next move along this line will be to investigate financial health of supply chain partners based on supplier relationship management practices. Originality/value This paper proposes health-care supply chain as an alternative solution to achieve the following twin purposes: controlling the cost while improving quality of care through supply chain finance. As far as we know, this study is the first attempt to achieve the goals.
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Henderson, Alex. "Supplies." Nursing Standard 3, no. 50 (September 9, 1989): 27. http://dx.doi.org/10.7748/ns.3.50.27.s36.

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Izzah, Nailul, and Ardianik Ardianik. "SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN SUPPLIER OBAT MENGGUNAKAN METODE WEIGHTED PRODUCT." Buana Matematika : Jurnal Ilmiah Matematika dan Pendidikan Matematika 8, no. 2: (December 31, 2018): 73–80. http://dx.doi.org/10.36456/buana_matematika.8.2:.1731.73-80.

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The pharmacy is a place for distributing pharmaceutical supplies (medicines) to the public. As an agency that deals directly with customers and the number of suppliers who want to distribute their goods through the pharmacy, it is necessary to choose suppliers to establish good and profitable cooperation. This research was held at the Sulfa Sulfida Lamongan Pharmacy. The purpose of this study is to design and build a decision support system to select suppliers and their implementation. The method used in supplier selection is a weighted product, where suppliers will be assessed based on price criteria, payment tempo, timeliness of delivery, accuracy in number and service support. The results showed that the weighted product method can be implemented in the decision support system for selecting drug suppliers at the Sulfa Sulfida Lamongan Pharmacy. This is evidenced by the same value between the calculation of the system and manually or in the system. Key Word: decision support system, supplier, weighted product
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Dissertations / Theses on the topic "Supplies"

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Thomas, Merin M. B. A. Sloan School of Management. "Intelligent supplies replenishment process." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122904.

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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, in conjunction with the Leaders for Global Operations Program at MIT, 2019
Thesis: S.M., Massachusetts Institute of Technology, Operations Research Center, in conjunction with the Leaders for Global Operations Program at MIT, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references.
Company X is facing high cost to serve customers such as hospitals and clinics, due to irregular ordering pattern. Currently, the customer ordering process is not well planned and leads to multiple orders in a month, thereby excessive shipping and increased cost to serve. The supplies provided to customers are used for specimen collection, and the collected specimen are sent to diagnostic laboratories for analysis. Historical data on order quantities of specimen collection items (SCIs) and specimen containers returned to lab are available. This project takes advantage of the closed loop nature of the system to predict order quantities of SCIs. This project explores two replenishment strategies and compares it with the current method, through simulation.
The simulation models the daily consumption of SCIs at a chosen Patient Service Center (PSC), and estimates average inventory levels and the number of occurrences of stockouts for each SCI at the PSC, for varying values of parameters such as review period and safety stock levels. The two replenishment strategies are (a) constant order quantity, in which fixed replenishment quantities of SCIs are supplied every review period, and (b) predictive modelling replenishment strategy, in which the order quantities of SCIs are predicted using the data on specimen containers returned to diagnostic lab for analysis. For the latter strategy, multiple models for prediction, such as penalized regression, Classification and Regression Trees (CART) and Random Forest are used. Two parameters, the total replenishment costs and the number of occurrences of stockouts, are measured to evaluate the performance of the replenishment strategies.
The total cost of replenishment for constant quantity strategy is comparable to that of baseline case, whereas predictive modelling strategies have much higher cost. The constant quantity strategy with increased levels of safety stock gives best results of reducing the total cost of replenishment and minimizing the number of occurrences of stockouts.
by Merin Thomas.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Operations Research Center
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Taylor, David Donald James. "Tools for managing intermittent water supplies." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118666.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 239-253).
Nearly one billion people receive water from piped networks that are not always pressurized. These intermittent water supplies (IWS) are more likely to recontaminate the distributed water than continuously-operated (or '24x7') water supplies. In addition, IWS may not provide customers with enough water. Improving the safety and sufficiency of IWS requires new management tools. This thesis proposes some such tools. Specifically, this thesis develops a suite of hydraulic, financial, and water quality models that show how each is affected by a utility's operational decisions. The proposed models are simple and do not require information about a pipe network's topology. To contextualize this work, an overview of Delhi, India's IWS is provided. The hydraulic model relates the supply pressure, supply duration, leakage rate, and volume of water received by customers. It shows that an IWS' behavior changes substantially when its customers receive the water they demand (i.e., are satisfied) and suggests why IWS exist and persist. The financial model additionally considers a utility's variable revenues and costs. It finds that low-pressure and intermittent operations maximize a utility's (short-term) gross margin and that current performance indicators encourage inequity. Where utilities are financially-motivated (e.g., performance-based contracts) the need for careful regulation and better benchmarks is demonstrated. Optimal performance penalties are proposed to ensure leak repair and high-pressure continuous water supply. The water quality model considers the conditions in which external contaminants can enter a pipe network. It shows that IWS have opposite effects on water quality during steady-state and non-steady-state operations. Both states should be regulated, modeled, and sampled. These models show that knowing the point at which customers become satisfied is crucial to managing and optimizing IWS. To better measure this point, a more accurate multi-jet water meter, which does not measure air, is designed and tested for use in IWS. The tools presented in this thesis support measuring and making progress towards global efforts such as the Sustainable Development Goals and the human right to water, promoting "safe" water supplies that are "available when needed."
by David Donald James Taylor.
Ph. D.
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Elice, Sara Jo 1979. "Chlorine demand in Haitian water supplies." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84797.

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Walpole, Mark Edward. "Intrinsically Safe (IS) Active Power Supplies." Thesis, Queensland University of Technology, 2003. https://eprints.qut.edu.au/15896/1/Mark_Walpole_Thesis.pdf.

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Intrinsically safe (IS) active power supplies subjected to certain transient load conditions can deliver power to a circuit at significantly higher levels than indicated on their nameplate ratings. During a transient load such as an intermittent short-circuit, energy is transferred from the power supply to the short-circuit and an electrical arc may form when the short-circuit is applied or removed. This poses a spark ignition risk as energy is transferred from the arc to the surrounding atmosphere. Currently various International and Australian Standards define the performance requirements for IS electrical apparatus. A duly accredited laboratory is required to establish the intrinsic safety compliance of an apparatus with the Standards. It involves an assessment of the apparatus and may include testing. The assessment of the apparatus determines adequate segregation, separation, construction, and selection of components. The tests performed on the apparatus include a temperature rise test and in some cases, the sparking potential of the circuit is tested using the spark test apparatus (STA). Testing the sparking potential of active power supplies to establish compliance adds significantly to the time and costs involved in establishing compliance. A new alternative assessment method is proposed in this report to augment or replace the testing phase of the compliance certification process for active power supplies. The proposed alternative assessment method (PAAM) is derived from a determination of the steady-state and transient output characteristics of the active power supply under consideration. Parameters such as peak output current, time constant of peak current decay, and the output voltages at these times are measured from the circuit's output characteristics. These measurements can subsequently be used to derive the topology and component values of an equivalent circuit. The resulting equivalent circuit is then considered like a linear power supply and the sparking potential can be determined using existing assessment methods. This thesis investigates in detail the equivalent circuit of a number of direct current (DC) active power supplies whose transient output characteristics exhibit predominantly capacitive behaviour. The results of the PAAM using the equivalent circuit are then compared with results achieved using the current testing procedure with a STA. A small sample of active power supplies is used to generate data from which a relationship between the current testing procedure and the PAAM can be established. The PAAM developed in this research project can be used as a pre-compliance check by designers, manufacturers, or IS testing stations. A failure of this test would indicate that the active power supply's sparking energy is not low enough to be regarded as intrinsically safe. The PAAM requires fewer resources to establish a result than the STA. The benefits of a simplified spark ignition test would flow on from designers and manufacturers to end users.
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Walpole, Mark Edward. "Intrinsically Safe (IS) Active Power Supplies." Queensland University of Technology, 2003. http://eprints.qut.edu.au/15896/.

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Intrinsically safe (IS) active power supplies subjected to certain transient load conditions can deliver power to a circuit at significantly higher levels than indicated on their nameplate ratings. During a transient load such as an intermittent short-circuit, energy is transferred from the power supply to the short-circuit and an electrical arc may form when the short-circuit is applied or removed. This poses a spark ignition risk as energy is transferred from the arc to the surrounding atmosphere. Currently various International and Australian Standards define the performance requirements for IS electrical apparatus. A duly accredited laboratory is required to establish the intrinsic safety compliance of an apparatus with the Standards. It involves an assessment of the apparatus and may include testing. The assessment of the apparatus determines adequate segregation, separation, construction, and selection of components. The tests performed on the apparatus include a temperature rise test and in some cases, the sparking potential of the circuit is tested using the spark test apparatus (STA). Testing the sparking potential of active power supplies to establish compliance adds significantly to the time and costs involved in establishing compliance. A new alternative assessment method is proposed in this report to augment or replace the testing phase of the compliance certification process for active power supplies. The proposed alternative assessment method (PAAM) is derived from a determination of the steady-state and transient output characteristics of the active power supply under consideration. Parameters such as peak output current, time constant of peak current decay, and the output voltages at these times are measured from the circuit's output characteristics. These measurements can subsequently be used to derive the topology and component values of an equivalent circuit. The resulting equivalent circuit is then considered like a linear power supply and the sparking potential can be determined using existing assessment methods. This thesis investigates in detail the equivalent circuit of a number of direct current (DC) active power supplies whose transient output characteristics exhibit predominantly capacitive behaviour. The results of the PAAM using the equivalent circuit are then compared with results achieved using the current testing procedure with a STA. A small sample of active power supplies is used to generate data from which a relationship between the current testing procedure and the PAAM can be established. The PAAM developed in this research project can be used as a pre-compliance check by designers, manufacturers, or IS testing stations. A failure of this test would indicate that the active power supply's sparking energy is not low enough to be regarded as intrinsically safe. The PAAM requires fewer resources to establish a result than the STA. The benefits of a simplified spark ignition test would flow on from designers and manufacturers to end users.
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Hu, Aiguo Patrick. "Selected resonant converters for IPT power supplies." Thesis, University of Auckland, 2001. http://hdl.handle.net/2292/3.

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For more than a century it has been known that signals and power can be transferred electromagnetically. This knowledge has motivated substantial research and development into wireless signal transmission which today is competitive with traditional conductive cabling systems. Power transfer across air gaps, however, has seen more modest development and has tended to be restricted to electric machines that have tight magnetic couplings. It is only very recently that a novel technique termed IPT (Inductive Power Transfer) has made power delivery to movable objects across large air gaps a practical reality. A typical IPT system comprises a primary power converter supplying high frequency alternating current to a conductive track loop with multiple secondary power pick-up circuits loosely coupled to it. IPT employs modern power conversion, control, and magnetic coupling techniques to achieve clean and reliable power transfer without direct electrical contact. Many practical applications have been found for IPT in materials handing, lighting, and transportation systems. One of the major constraints, however, is the primary power supply, particularly at high power levels and when power transfer over large distances is required. In this thesis selected resonant converters suitable for IPT power supplies are investigated using mathematical analysis, computer simulations and practical experiments. The basic characteristics and underlying principles of the converters are studied in order to determine their dynamic performance and power transfer capability. Special attention is given to improving existing IPT power supplies while investigating new power converters in order to achieve high efficiency and reliable operation at reduced cost. The current-fed parallel resonant converter power supply has been the basis of most commercial applications to date. It has a high efficiency and produces good voltage and current waveforms. However, both the track length that it can drive and the power level it can operate at are limited and the system may vary in frequency if the track resonant circuit and the pick-up load are not carefully designed. As a result, this supply, in its simple form, is only suitable for short track lengths and low power applications. The voltage-fed series ii quasi-resonant converter power supply controls the frequency directly and is capable of driving longer track lengths as a result of series compensation employed in the track loop. However, its voltage and current waveforms contain more harmonics, and while high efficiency may be achieved with soft switching, the condition is very dependent on the track compensation and is difficult to meet during start-up and shut down transients. In consequence, this supply is suitable for medium track lengths and medium power level applications. Improved current-fed and voltage-fed IPT power supplies are proposed in this thesis. They have the most preferred track current properties, including constant magnitude and nearly pure sine wave characteristics. Despite the circuit complexity and high system cost involved, these supplies are ideally suitable for long track lengths and high power applications. A novel converter based on free oscillation and energy injection control is also presented and shown to be capable of achieving high frequency AC power generation at very low switching frequencies while reducing the system cost. As such it is appealing for long track length, high track current, high frequency, and low voltage source applications. Finally, a very simple converter based on self-sustained oscillation without an external controller is demonstrated at low operating voltages, and a cost-effective option to overcome the start-up problems exhibited by most IPT power supplies at high voltages is shown with excellent dynamic zero voltage switching performance.
Whole document restricted, but available by request, use the feedback form to request access.
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Yang, Zaohong. "Novel techniques for switch-mode power supplies." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0007/NQ38339.pdf.

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Hama-amin, Samman, and Andrejs Veldre. "Investigation of power supplies used in OSC950." Thesis, KTH, Data- och elektroteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133450.

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SammanfattningOCS950(Object Controller System 950) är en av Bombardiers produkter som hanterar säkerhetssystemet i järnvägstrafiken. Det består av olika delsystem och strömförsörjs mha nätaggregat (PSU – Power Supply Unit). I den här rapporten undersöks den befintliga PSU74-modellen samt nya switchade nätaggregat som finns på marknaden.Bakgrunden till att Bombardier vill byta ut PSU74 mot ett nytt switchat aggregat är att PSU74 har en vikt på 14 kg och tar stor plats i el-skåp. Ett swichat nätaggregat väger ungefär 1,5 kg och är så pass kompakt att det tar litet utrymme i el-skåpet.Bombardier har medvetet väntat med att gå över till SMPS eftersom tillförlitlighet blir ett problem. Detta problem kan lösas mha redundanta kopplingar. MTBF är den största utmaningen vid övergång till SMPS. MTBF beräkningar för redundanta kopplingar presenteras i rapporten och resultatet visar att ju fler enheter ett system innehåller desto mindre blir MTBF-värdet.I faktainsamlingsdelen beskrivs och förklaras olika viktiga begrepp för att underlätta förståelse av rapporten. MTBF, linjära och switchade nätaggregat är bara några begrepp som tas upp.En studie av PSU74 och en lista över dess viktiga egenskaper presenteras, det är en utgångspunkt för kravspecifikation för nytt switchade nätaggregat. Vissa egenskaper som prioriteras är MTBF, in-och utspänning, vikt och drifttemperatur mm.Ett enkelt kretsschema konstrueras och visar principen för redundant koppling. Kravspecifikationen finns i ett tabellformat. De flesta egenskaper är definierade men vissa är ej fastställta. Bombardier definierar värde på dessa egenskaper efter diskussion med potentiella tillverkare.En alternativ lösning presenteras där ett uppvärmningsförslag av el-skåp läggs fram. Denna metod kan bredda urval av SMPS på marknaden. En omfattad undersökning av marknaden genomförs där olika modeller analyseras baserade på kravspecifikationer. En utmaning är omgivningstemperaturen eftersom de  flesta SMPS tål – 25°C minimum drifttemperatur. Några modeller som uppfyller kriterierna undersöks noggrant och systematiskt. Analys av utvalda SMPS utförs och slutsatser presenteras där för- och nackdelar med respektive modell lyfts fram. Det konstanteras att modell från Cosel TUFS300F28 är ett bra alternativ för ersättning av PSU74.
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Dancy, Abram P. (Abram Paul). "Power supplies for ultra low power applications." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10069.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
Includes bibliographical references (p. 101-103).
by Abram P. Dancy.
M.Eng.
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Tebb, David W. "Transistorised induction heating power supplies using MOSFET's." Thesis, Loughborough University, 1986. https://dspace.lboro.ac.uk/2134/12595.

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A prototype has been designed and constructed that has fed 3kW into a Commercial workcoil at 150 kHz. Another lower power inverter has been built. This was developed with ease of production in mind to aid the transfer of technology to the sponsoring company. The company have adopted this unit and are manufacturing it. The thesis reviews induction heating power supplies with emphasis on those able to operate above 100 kHz. Members of the MOSFET family are described and critically assessed for the application Prototypes of various configurations have been constructed and experience of these has led to the choice of current fed topology as the best for the application. The design and layout of a three phase current fed full bridge inverter that can feed 5 kW into an industrially relevant coil at 400 kHz and a single phase 2.5 kW version are described. Results of tests carried out on the units are presented. A microprocessor system has been selected which has been used for closed loop control of power, temperature and housekeeping tasks such as the supervision of interlocks.
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Books on the topic "Supplies"

1

Cameron, Julia. Supplies. New York: Jeremy P. Tarcher/Putnam, 2000.

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Water supplies. South Yarra, Vic: Macmillan Education, 2009.

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Supplies, Northamptonshire (England) County. County Supplies. Northampton: Northamptonshire County Council, 1991.

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Scottish Health Management Efficiency Group. Sterile supplies. [Edinburgh]: The Group, 1989.

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Power supplies. Amsterdam: Elsevier, 1987.

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Supplies, Northamptonshire (England) County. County supplies. Northampton: Northamptonshire County Council, 1990.

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Jakab, Cheryl. Water supplies. Mankato, Minn: Smart Apple Media, 2010.

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Welton, Jude. Water supplies. London: Franklin Watts, 2004.

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Ontario. Ministry of Health. Assistive Devices Branch. Ostomy supplies. Toronto, Ont: Queen's Printer for Ontario, 1990.

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Ontario. Ministry of Health. Assistive Devices Branch. Incontinence supplies. Toronto, Ont: Queen's Printer for Ontario, 1990.

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Book chapters on the topic "Supplies"

1

Reeder, Ron, and Christina Z. Anderson. "Supplies." In DIGITAL NEGATIVES with QuadToneRIP, 13–17. London; New York: Routledge, 2021. | Series: Contemporary practices in alternative process photography: Routledge, 2020. http://dx.doi.org/10.4324/9781003017806-3.

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Kories, Ralf, and Heinz Schmidt-Walter. "Power Supplies." In Electrical Engineering, 469–512. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55629-6_9.

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Gastaldi, Roberto, and Giovanni Campardo. "Power Supplies." In Electronic Experiences in a Virtual Lab, 19–44. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45179-0_2.

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McMullan, R. "Water Supplies." In Environmental Science in Building, 272–303. London: Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-22169-1_13.

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Hibbs, Alan R. "Technical Supplies." In Confocal Microscopy for Biologists, 335–46. Boston, MA: Springer US, 2004. http://dx.doi.org/10.1007/978-0-306-48565-7_14.

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Craig, Edwin C. "Power Supplies." In Electronics via Waveform Analysis, 15–42. New York, NY: Springer New York, 1993. http://dx.doi.org/10.1007/978-1-4612-4338-0_3.

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Gift, Stephan J. G., and Brent Maundy. "Power Supplies." In Electronic Circuit Design and Application, 373–409. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46989-4_10.

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Nahler, Gerhard. "study supplies." In Dictionary of Pharmaceutical Medicine, 177. Vienna: Springer Vienna, 2009. http://dx.doi.org/10.1007/978-3-211-89836-9_1351.

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Edington, John. "Fuel Supplies." In Indigenous Environmental Knowledge, 97–122. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62491-4_5.

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Goodge, Malcolm. "Power Supplies." In Analog Electronics, 334–403. London: Palgrave Macmillan UK, 1990. http://dx.doi.org/10.1007/978-1-349-20994-1_11.

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Conference papers on the topic "Supplies"

1

"Power supplies." In 2014 5th Power Electronics, Drive Systems & Technologies Conference (PEDSTC). IEEE, 2014. http://dx.doi.org/10.1109/pedstc.2014.6799399.

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Zhang Chun-ping and Li Cui. "Choosing the supplier for emergency supplies based on AHP/linear programming." In 2011 International Conference on Management Science and Industrial Engineering (MSIE). IEEE, 2011. http://dx.doi.org/10.1109/msie.2011.5707743.

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Lundbäck, Maja, and Mattias Karlsson. "Degraded Power Supplies." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60255.

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The electrical disturbance in Forsmark 2006 [3] led to increased attention being paid to the power supplies of nuclear power plants and their role in safety system reliability, both nationally and internationally. Since then numerous disturbances similar in nature have occurred in the electrical power supply which raises questions whether best available technology (BAT) has been utilised in the design and analysis of the electrical power supply of the safety functions of nuclear facilities. On repeated occasions this type of disturbances has had an impact on redundant parts of several safety systems due to functional dependencies between these. The frequency of these occurrences has been unexpected. The Swedish Radiation Safety Authority (SSM) has decided to write this document to clarify the regulators position on this issue. The document is also intended to support SSM:s assessments and evaluations of the Licensees efforts regarding degraded power supplies. An assessment of nuclear power plant electrical power systems is necessary in the light of the past years’ operational experience [1–7], where disturbances in the electrical power supply on repeated occasions have caused a power supply with degradation severe enough to challenge plant safety. As the potential consequences of such a degraded power supply can be severe it must be proven that the frequency of such occurrences is tolerably low. Furthermore, it is important to consider experiences from known situations with degraded power supplies, to enable a reasonable approach to identify and take counter-measures based on the root-cause and ensure utilisation of best available technology. A sufficient approach to enable prevention, protection and mitigation against this type of disturbances has been difficult to identify. Actual events and conditions causing a degraded power supply have often been complex in nature and difficult to anticipate, wherefore events and conditions which has not yet occurred are difficult to foresee. For this reason it is deemed most effective to identify and implement proportional measures that enhances the independence of the power supplies, such that a degraded power supply with a higher reliability is prevented from propagating to multiple parts of the safety systems. In this memorandum, SSM describes a state-based approach to analysing electrical power system functionality in different states of degraded power supply. The approach is intended to identify potential design weaknesses and measures to enhance robustness. Such an approach is viewed as more favourable in facilitating the identification of such measures, which may otherwise be neglected due to an estimated low frequency of occurrence, or missed due to incomplete identification of possible events and conditions. Furthermore this document describes how an assessment of electrical power system design can be performed, where the lowest common denominator from operational experience e.g. [1–7] is identified and counteracted. Actual occurrences of degraded power supplies, which all have been “unknown during the event identification process” but “well-known electrical phenomena”, can be described as unidentified degrading conductive disturbances.
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Raffaelle, R., P. Jenkins, D. Scheiman, M. Smith, D. Wilt, T. Kerslake, and A. Hepp. "Microsat power supplies." In 40th AIAA Aerospace Sciences Meeting & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2002. http://dx.doi.org/10.2514/6.2002-719.

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Rahman, M. "Signalling power supplies." In IET Seminar on Signalling and Power Distribution. IEE, 2006. http://dx.doi.org/10.1049/ic:20060627.

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"Uninterruptible power supplies." In 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551). IEEE, 2004. http://dx.doi.org/10.1109/pesc.2004.1354726.

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"High perfomance power supplies." In IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2013. http://dx.doi.org/10.1109/iecon.2013.6700306.

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Yan-Yan, Liu, and Wang Jian-Guo. "Emergency Supplies Scheduling Model." In 2015 Seventh International Conference on Measuring Technology and Mechatronics Automation (ICMTMA). IEEE, 2015. http://dx.doi.org/10.1109/icmtma.2015.110.

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Stretton, T., and N. Holt. "Design [Signalling power supplies]." In IET Seminar on Signalling and Power Distribution. IEE, 2006. http://dx.doi.org/10.1049/ic:20060622.

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Stretton, T., and N. Holt. "Installation [Signalling power supplies]." In IET Seminar on Signalling and Power Distribution. IEE, 2006. http://dx.doi.org/10.1049/ic:20060623.

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Reports on the topic "Supplies"

1

Bruno, Don. ATR Power Supplies. Office of Scientific and Technical Information (OSTI), September 1996. http://dx.doi.org/10.2172/1119231.

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Sarychev, Michael. Lifting BLS Power Supplies. Office of Scientific and Technical Information (OSTI), August 2007. http://dx.doi.org/10.2172/1036782.

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Author, Not Given. Electric supplies of the 1990s: Growing reliance on demand management and third-party suppliers. Office of Scientific and Technical Information (OSTI), October 1988. http://dx.doi.org/10.2172/6298644.

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Forsyth, E. B., M. Meth, and W. Zhang. Pulsed Power Supplies for RHIC. Office of Scientific and Technical Information (OSTI), October 1991. http://dx.doi.org/10.2172/1119152.

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Greve, Alan R. Cost of Nonconforming Supplies Update. Fort Belvoir, VA: Defense Technical Information Center, October 1994. http://dx.doi.org/10.21236/ada328630.

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Lambiase R. Energy Recovery Linac: Power Supplies. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/1061956.

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Lambiase, R. R&D ERL: Power Supplies. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/1013450.

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Hahn, H. Temporary Cost Savings in Power Supplies. Office of Scientific and Technical Information (OSTI), August 1985. http://dx.doi.org/10.2172/1119037.

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Leiby, P. N. Fossil fuels supplies modeling and research. Office of Scientific and Technical Information (OSTI), June 1996. http://dx.doi.org/10.2172/450784.

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Newmark, R. Innovative Technologies to Protect Water Supplies. Office of Scientific and Technical Information (OSTI), July 2004. http://dx.doi.org/10.2172/15014411.

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