Teses / dissertações sobre o tema "Risk inventory"
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1
Cakmak, Ulas. "On risk-averse and robust inventory problems". Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44745.
Resumo:
The thesis focuses on the analysis of various extensions of the classical multi-period single-item stochastic inventory problem. Specifically, we investigate two particular approaches of modeling risk in the context of inventory management: risk-averse models and robust formulations. We analyze the classical newsvendor problem utilizing a coherent risk measure as the objective function. Properties of coherent risk measures allow us to offer a unifying treatment of risk averse and min-max type formulations. We show that the structure of the optimal policy of the risk-averse model is similar to that of the classical expected value problem for both single and multi-period cases. The result carries over even when there is a fixed ordering cost. We expand our analysis to robust formulations of multi-period inventory problems. We consider both independent and dependent uncertainty sets and prove the optimality of base-stock policies for the general problem formulation. We focus on budget of uncertainty approach and develop a heuristic that can also be employed for a class of parametric dependency structures. We compare our proposed heuristic against alternative solution techniques.
2
Lewis, Brian Michael. "Inventory Control with Risk of Major Supply Chain Disruptions". Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7155.
Resumo:
This thesis studies inventory control with risk of major supply chain disruptions, specifically border closures and congestion. We first investigate an inventory system in which the probability distributions of order leadtimes are dependent on the state of an exogenous Markov process; we will model border disruptions via this exogenous process. We consider stationary, state-dependent basestock policies, which are known to be optimal for the system under study, and develop an expression for the long-run average cost of an arbitrary policy of this form. Restricting our attention to state-invariant basestock policies, we show how to calculate the optimal basestock (or order-up-to) level and long-run average cost. We provide a sufficient condition for the optimality of a state-invariant basestock policy and monotonicity results for the optimal state-invariant order-up-to level. We finally give the optimal state-invariant order-up-to level for a special class of supply states.
Motivated by the possibility of port of entry closures in the event of a security incident, we specialize the previous model to a two-stage international supply chain. A domestic manufacturer orders a single product from a foreign supplier and the orders must cross an international border that is subject to closure. We first assume that border congestion is negligible. The manufacturer's optimal inventory policy and long-run average cost are analyzed. We present structural policy results and the results of a comprehensive numerical study that have important implications for business and for the cooperation between business and government in disruption management and contingency planning.
Finally we extend the border closure model to include both border closures and the resulting congestion. We model the border processing system as a discrete-time, single-server queue with constant arrival rate and Markov-modulated service rate. A key task is the development of the leadtime distribution, which is more complex than in the previous model. We present the results of a comprehensive numerical study and provide managerial insights.
3
Klebe, Jesse Daniel. "Optimal Inventory Strategy Under Risk: A Contingent Claims Approach". Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/29792.
Resumo:
Inventory management in the agriculture industry involves many sources of risk in terms of demand uncertainty as well as uncertain margins. Divulging an optimal inventory strategy can prove cumbersome to logistics managers. In this thesis, inventory is viewed as a real option on the ability to operate. Contingent claims inventory (CCI) analysis, paired with stochastic binomial real option valuation, provides a model which values the real option embedded in holding inventory and iterates the purchasing strategy until expected profit is maximized. This framework is applied to three industry cases pertaining to: wheat flour milling, fertilizer merchandising, and bulk shipments via primary rail contracts.
4
Kene, Prachi. "Utility of the Personality Assessment Inventory in Assessing Suicide Risk". Connect to full text in OhioLINK ETD Center, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1196965938.
Resumo:
Thesis (M.A.)--University of Toledo, 2007.Typescript. "Submitted as partial fulfillment of the requirements for The Master of Arts Degree in Psychology." "A thesis entitled"--at head of title. Bibliography: leaves 57-82.
5
YE, Zuobin. "A risk-averse newsvendor model with pricing consideration". Digital Commons @ Lingnan University, 2004. https://commons.ln.edu.hk/otd/18.
Resumo:
A decision maker who is facing a random demand for a perishable product, such as newspapers, decides how many units to order for a single selling period. This single-period inventory problem is often referred to as the \classic newsvendor problem", in which the selling price is ¯xed, the order must be made before the selling period, and the decision maker is risk-neutral. If the decision maker orders too many (overage), the inventory cost will be too high. If the decision maker orders too few (underage), the potential pro¯t will be lost. The optimal order quantity is a balance between the expected costs of overage and underage.
This thesis investigates an extension of the classic newsvendor problem. In this extension the demand depends on the selling price, the decision maker may obtain an additional order at a higher price during the selling period, and the decision maker is risk-averse (not risk-neutral). The problem is to ¯nd optimal order quantity and selling price so that the expected utility of the risk-averse decision maker is maximized.
This thesis examines the relationship between the order quantity and the sell- ing price for di®erent risk-averse decision makers in this extended newsvendor problem de¯ned above. The result shows that the relationships are consistent for some decision makers but not for others. For example, if the decision maker exhibits a constant absolute risk aversion (CARA), the optimal order quantity will decline when the selling price increases. If the decision maker has constant relative risk aversion (CRRA), the relationship is complex. This thesis ¯nds that if it is just known that the decision maker is risk-averse, the optimal order quantity placed is less than that made by a risk-neutral decision maker. Further more, the risk-averse decision maker's optimal order quantity falls when her/his risk aversion increases. However, the relationship between order quantity and selling price is still indeterminate in this case.
This extension of the classic newsvendor problem provides a more realistic dy- namic setting than before, therefore providing an excellent framework for exam- ining how the inventory problem interacting with the marketing issue (selling price) will in°uence decision makers at the ¯rm level. It also provides an inte- grated framework for investigating di®erent variations of newsvendor problems. Thus, this thesis will motivate and encourage more applications of the newsven- dor problem which is a foundation of many supply chain management problems.
6
Arikan, Fichtinger Emel, e Lena Silbermayr. "Risk pooling via unidirectional inventory transshipments in a decentralized supply chain". Taylor & Francis, 2017. http://dx.doi.org/10.1080/00207543.2017.1394586.
Resumo:
We study risk pooling via unidirectional lateral transshipments between two locations under local decision-making. Unidirectional
transshipments can be applicable when cost structures and/or capabilities differ between locations, and it is also a
common practice in dual channel supply chains with online and offline sales channels. We show that such a system cannot
be coordinated only with varying transshipment prices. The transshipment receiver orders more and the transshipment giver
orders less than the respective optimal centralised order quantities. In order to remove this discrepancy, we suggest horizontal
coordinationmechanisms by introducing a leftover subsidy for the location providing the transshipments or a shortage subsidy
for the location receiving transshipments as well as a combination of shortage and leftover subsidy. Further, we evaluate
the impact of network structure by comparing the equilibrium order quantities and profits under the uni- and bidirectional
systems as well as a system without transshipments. Since demand correlation is a critical aspect in risk pooling we provide
a detailed numerical study to discuss its impact on our findings.
7
Huang, Wan-Yu M. Eng Massachusetts Institute of Technology, e Jierui Liu. "A joint inventory and sourcing strategy to balance efficiency versus risk". Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92641.
Resumo:
Thesis: M. Eng. in Logistics, Massachusetts Institute of Technology, Engineering Systems Division, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 70-72).
This research sought to identify the right strategy to mitigate the supply chain risk while maintaining supply chain efficiency for a company in the medical device industry. The company in our case was exposed to great risk of supplier disruption because of its single source practice. In general, there are two different approaches to reduce the impact of supplier disruption. One is holding additional inventory to cover the demand over the time-to-recovery, and the other is maintaining a second source to reduce the risk. In this research, we proposed a method of distinguishing the better approach. First, we classified the SKUs by criticality and complexity, evaluated the current inventory policy and inventory status, defined the time-to-recovery for each SKU, estimated the potential revenue lost over the time-to-recovery, calculated the additional inventory required, and calculated the related cost for both holding additional inventory and maintaining a second source. Then, we compared the three ROA ratios from holding additional inventory, maintaining a second source, and not taking any action (potential sales lost). The strategy with the highest ROA ratios represented the most efficient way to prevent the risk of supplier disruption. Based on the analysis, holding additional inventory was generally a better strategy for the company in the medical device industry to protect itself from the risk of supplier disruption in any given level of supplier risk.
by Wan-Yu Huang and Jierui Liu.
M. Eng. in Logistics
8
Hampshire, Kenneth E. "External risk monitoring and inventory sizing in supply chain disruption mitigation". Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122593.
Resumo:
Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, 2019, In conjunction with the Leaders for Global Operations Program at MITThesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019, In conjunction with the Leaders for Global Operations Program at MIT
Cataloged from PDF version of thesis.
Includes bibliographical references (page 67).
As AstraZeneca's product portfolio becomes increasingly complex, its supply chains must evolve in parallel. These supply chains operate in an environment of ever-present external risks such as factory fires, geopolitical disruptions and natural disasters. Such risks might manifest as disruptions which could jeopardize the health of those who depend upon AstraZeneca's life-saving medicines. Accordingly, there is a need to improve proactive planning and reactive risk decisions to maintain service levels in such an environment. This thesis presents an approach which enhances both risk planning decisions and reaction to disruptive events. The approach consists of a third party software solution to provide better supply chain visibility, increased risk awareness, and faster disruptive event notification, as well as a stochastic nonlinear optimization model to support inventory reductions. Both approaches improve risk planning decisions, while the software approach also supports reactive decision-making as disruptive events unfold. For a single brand, this thesis model shows that current risk mitigation inventory sizes across its supply chain can be reduced by over 50% while maintaining the target service level. The cost savings estimated for a reduction of this magnitude are at least $20M for one brand alone. Simultaneously, the software uncovers previously unknown sub-tier suppliers and highlights tier one dependencies. Adoption of this thesis' recommendations can improve risk planning and decisionmaking within AstraZeneca's supply chains while greatly reducing mitigation inventory costs.
by Kenneth E. Hampshire.
M.B.A.
S.M.
M.B.A. Massachusetts Institute of Technology, Sloan School of Management
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering
9
Wang, Shuoyu, e 王硕玉. "Optimal inventory strategies in supply chains under a value-at-risk constraint". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B4440704X.
10
Muthukumar, Subrahmanyam. "The application of advanced inventory techniques in urban inventory data development to earthquake risk modeling and mitigation in mid-America". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26662.
Resumo:
Thesis (Ph.D)--City Planning, Georgia Institute of Technology, 2009.Committee Chair: French, Steven P.; Committee Member: Drummond, William; Committee Member: Goodno, Barry; Committee Member: McCarthy, Patrick; Committee Member: Yang, Jiawen. Part of the SMARTech Electronic Thesis and Dissertation Collection.
11
Girard, Lina. "The Level of Service Inventory-Ontario Revision, risk/need assessment and recidivism". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0021/NQ46520.pdf.
12
Rey, Maria (Maria de los Santos), e Xiaofan Xu. "Identifying inventory excess and service risk in medical devices : a simulation approach". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112859.
Resumo:
Thesis: M. Eng. in Supply Chain Management, Massachusetts Institute of Technology, Supply Chain Management Program, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 81-82).
Medical devices companies struggle to balance between inventory and service performance, as the products are non-interchangeable and inventory investment is expensive. To find the right level of inventory, we first used unsupervised clustering method to find demand pattern uncertainty for each product. Then, we developed a simulation-based approach to determine the required inventory to achieve a required service level guarantee. We further explored policy changes in the demand fulfillment process to identify how the company can effectively improve performance without increasing inventory level. After comparing different results, we concluded that reduction of replenishment lead time is the most effective measure. The methodology can be applied to a wide range of products and sectors.
by Maria Rey and Xiaofan Xu.
M. Eng. in Supply Chain Management
13
Pollock, Leslie Ronald. "Suicide and suicidal risk in a rural context : social and psychological factors". Thesis, Bangor University, 2000. https://research.bangor.ac.uk/portal/en/theses/suicide-and-suicidal-risk-in-a-rural-context--social-and-psychological-factors(2b5cc415-d25e-48e4-8735-3377a8ef5c7c).html.
Resumo:
In a series of studies, rural and urban suicides were compared and the psychological factors underlying suicidal behaviour investigated. In the first study suicides in a Nfid-Wales county were examined and contrasted with a group of urban suicides. The pattern of rural suicides was found to differ from the urban suicides. Rural suicides were more evenly spread through the age bands, mostly married and used more violent means of death. Farmers comprised a large proportion of rural suicides and seem to differ from rural suicides in general in that 88% were over 45 years of age, most died of hanging, only 13% left notes and they had no record of previous suicide attempts. The factors that might cause farmers stress were examined. This showed that farmers found form filling and adjusting to government policy most stressful. Isolation was relatively unimportant as a stressor. In the third study the role of mood and problem solving in suicidal behaviour was investigated in three matched groups (suicidal, psychiatric control and non-psychiatric control). The suicidal group was found to display a careless and impulsive problem solving style and unique deficits in decision making and generation of alternative solutions. They were also more depressed, angry and confused. The problem solving deficits remained even when the effects of the mood differences were removed. The last study investigated the relationship between autobiographical memory and problem solving and found the suicidal group to be significantly more overgeneral in their memories, they produced fewer means and less effective problem solving solutions and these deficits were found to persist over time. These results were interpreted as support for these factors being trait features or alternatively requiring more time to recover. The findings were incorporated into a revised version of the "Cry of Pain" model of suicidal behaviour (Williams, 1997).
14
Irish, Leah A. "Development, Reliability and Validity of the Health Risk Behaviors Inventory: A Self-Report Measure of 7 Current Health Risk Behaviors". Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1302034344.
15
Foreman, Mark E. "Predicting Future Risk of Liability in Police Officer Candidates Using M-PULSE Inventory(TM)". Thesis, Alliant International University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3612238.
Resumo:
The Matrix Predictive Uniform Law Enforcement Inventory (M-PULSE ™) is a self-report, actuarial instrument used to predict job performance and liability risk, as well as assist law enforcement agencies in selecting qualified candidates. This study examined whether there is a statistically significant difference between two clusters of candidates' Empirical Scales scores as they relate to applicants' mean scale score differences on the M-Pulse™ liability scales. This study was conducted in an effort to confirm predictive and ecological validity and used archived data from a proprietary database retained by MHS, Inc. This data consisted of 1,000 randomly selected individuals from a normalized database of 5,000 individuals who had previously completed the M-PULSE ™ and were subsequently hired by a law enforcement agency. A series of independent-samples t-tests were conducted to compare each of the M-Pulse ™ liability scales scores of law enforcement applicants in each cluster. Post hoc Bonferroni correction resulted in &agr; ≤ .003. Statistically significant differences were found in Potential for Resignation when comparing scores for Cluster 1 (M = 49.49, SD = 9.85) and Cluster 2 (M = 51.85, SD = 10.97); t(998) = -3.545, p < .003; d = .226 and in Potential for Termination: Cluster 1 (M = 49.05, SD = 9.48) and Cluster 2 ( M = 52.14, SD = 10.57); t(998) = -4.833, p < .003; d = .308. This study suggests the M-PULSE ™ can tease out candidates who show a propensity to prematurely resign or be terminated. Predicting foreseeable liability risks helps law enforcement agencies manage ecological issues that affect officers.
16
Balcik, Burcu. "Multi Item Integrated Location/inventory Problem". Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1093640/index.pdf.
Resumo:
In this study, the design of a three-level distribution system is considered in which a
single supplier ships a number of items to the retailers via a set of distribution
centers (DC) and stochastic demand is observed at the retailers. The problem is to
specify the number and location of the DCs, and the assignment of the retailers to
the DCs in such a way that total facility, transportation, safety stock, and joint
ordering and average inventory costs are minimized, and customer service
requirements are satisfied. Single source constraints are imposed on the assignment
of the retailers to the DCs. The integrated location/inventory model incorporates the
inventory management decisions into the strategic location/allocation decisions by
considering the benefits of risk pooling and the savings that result in the joint
replenishment of a group of items. We develop two heuristic methods to solve the
non-linear integer-programming model in an integrated way: (1) Improvement type
heuristic, (2) Constructive type heuristic. The heuristic algorithms are tested on a number of problem instances with 81 demand points (retailers) and 4 different types
of items. Both of the heuristics are able to generate solutions in very reasonable
times. The results are compared to the results of the p-median problem and found
that the total cost and the number of DCs can be lowered using our integrated model
instead of the p-median problem. Finally, sensitivity analysis is performed with
respect to the changes in inventory, transportation, and ordering cost parameters, and
variability of the demand.
17
Arnold, Thomas K. "Confirmatory Factor Analyses of the Level of Service Inventory-Revised". University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573224799095916.
18
Silbermayr, Lena, e Yigal Gerchak. "Partial pooling by independent firms with allocation according to contribution to pool". Elsevier, 2019. http://dx.doi.org/10.1016/j.ijpe.2019.06.018.
Resumo:
We consider two firms which pool some of their inventory. The pool is created by the firms' contributions, and a firm's entitlement for an allocation from the pool (if needed) is a function of its contribution. Transshipment from the pool is costly, but the firms can benefit from reduced risk through inventory sharing using the pool. We analyze the resulting non-cooperative game. We prove existence of a Nash equilibrium and compare it to a model with centralized control. An appropriate compensation cost for using the other firms contribution to the pool can induce the retailers to achieve centralized solutions. We also compare the optimal partial pooling strategy to the special cases of no pooling and complete pooling and discuss situations where it is likely that one of the special cases will be optimal. Numerical results confirm that in the prevalent practice of partial pooling the retailers can achieve higher expected profits than under no pooling or complete pooling and that there is a significant difference between a setting with independent players and a model of central control.
19
Larson, David (David William). "Mitigating the risk of a new workforce by reducing rework and rightsizing on hand inventory". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/49777.
Resumo:
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Manufacturing Program at MIT, 2009.Includes bibliographical references (p. 56).
Dramatically increasing the hourly workforce at a rapid pace to support accelerated product demand in an aircraft manufacturing facility in a short amount of time resulted in: (1) increased rework, and (2) increased part damage during assembly. The majority of rework results from simple workmanship mistakes from the new workforce. The approach used in this thesis to combat the increase in rework involves the design and implementation of a feedback loop on the shop floor of a leading aircraft manufacturer. The loop consists of providing each worker with a list of their discrepant work from the day before and the opportunity for them to perform their own rework. The thesis shows that the percent of discrepancies reworked by the original mechanic increases from 27% to 41%. Paired data is analyzed to show (on average) a 20% decrease in rework when the feedback loop is utilized. Included is qualitative advice on implementing change on the shop floor. During final testing, damaged parts (typically as a result of out of sequence work or workmanship mistakes) are discovered and require immediate replacement. Frequently, there are no replacement parts available at the test site, since the original part was installed by a subcontractor. To meet the immediate replacement need, test personnel remove an already installed part from an aircraft upstream in final assembly at the same location. The thesis includes a case study to demonstrate a binomial demand model to estimate the amount of on hand safety stock required to prevent the unnecessary labor from the redundant part removal and replacement from upstream aircraft.
(cont.) The case study estimates demand based on the probability of finding a damaged part, the takt time of the particular model, the leadtime and delivery quantity of replacement parts. A cost tradeoff is calculated to justify the additional capital investment in inventory. The thesis closes with a leadership case study on whom and how to hand off a shop floor Tip of the Day system for the new workforce to ensure its continued success.
by David Larson.
S.M.
M.B.A.
20
Gaskins, Tamboura E. (Tamboura Elyse). "Abb Inc. medium-voltage products' supply chain analysis, including inventory, supplier scorecard, and risk assessments". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37218.
Resumo:
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Manufacturing Program at MIT, 2006.Includes bibliographical references (p. 36-37).
In conformance with ABB's process excellence plan, this thesis study was undertaken to support improvements in on-time delivery of components, decreased order cycles, and reduced inventory levels for ADVAC (spring-mechanized)/AMVAC (magnetic-actuated) medium-voltage circuit breakers. With the goal of improving the efficiency of the ADVAC/AMVAC supply chain, the study involved analyzing circuit breaker inventory level and position, assessing a supplier scorecard, and assessing general supply chain risk methodologies. In an effort to assess supply chain risk, a value stream map was created to uncover where the project team should focus to best address supply chain risk and contingency planning. The project team identified opportunities to improve order processing using an electronic ordering system. The team investigated the feasibility of eliminating or reducing air freight to improve transportation costs. Also, the team examined ADVAC/AMVAC inventory holdings at various stages in the supply chain and determined that it was more cost-effective to hold as much component inventory as possible instead of finished goods inventory, while standardizing delivery cycles, in order to move toward a just-in-time order-fulfillment process.
by Tamboura E. Gaskins.
S.M.
M.B.A.
21
Chin, Yee Sing. "Impacts of fuel inventory on low temperature ignition risk during handling and storage of biomass". Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/18253/.
Resumo:
As modernisation takes place, fossil fuel burning is one of the quickest ways to meet the ever rising energy demand. The increasing emissions of greenhouse gases, particularly carbon dioxide, as a result of excessive fossil fuel burning had been blamed for global climate change. Vegetation-based biomass is a form of bioenergy and a recognised solid renewable fuel with potential to replace coal in combating anthropogenic climate change in the power generation sector. Nevertheless, it is not a straight forward case for biomass to replace coal since biomass is an extremely reactive fuel prone to self-heating leading to self-ignition. Spontaneous biomass ignition leading to disastrous fires during biomass handling and storage could be avoided if the causes of biomass low temperature ignition are well understood. Detailed studies on woody and herbaceous biomass fuels commonly used in UK power stations were examined according to several British Standards. On top of characterising all the biomass samples, BS EN 50281-2-1 and BS EN 15188 were adhered to specifically in investigating low temperature ignition during biomass handling and biomass storage respectively. Many power stations use a mix of different biomass in their fuel inventories which can lead to dusts of biomass mixtures. Thus the low temperature ignition characteristics of biomass blends have been studied. Other factors that may impact on ignition risks are binders (added to give strength to briquettes or pellets) and pretreatments (washing and torrefaction). Washing aims to improve ash properties towards the end of combustion process while torrefaction is used to increase the calorific value of biomass that is naturally lower than fossil fuels. The reaction kinetics of some biomass dust layers deposited on a constant temperature hot surface and corresponding ignition delay time were estimated mathematically. Results from minimum dust layer ignition temperature determination showed that all biomass, regardless of woody or herbaceous, with or without binder, before or after pre-treatments, had critically ignited within a very small temperature range. This was consistent with the results of self-ignition propensity risk ranking that concluded that biomass possess medium-high risk of self-igniting. An exception to this is torrefied biomass which had not sustained a much higher temperature before it critically ignited as compared with the untreated counterpart; unlike many anticipations and therefore, the low temperature ignition characteristics were discussed from many other aspects, mainly on the reduced particle size or dust layer density. For biomass storage, scaling up method and Frank-Kamenetskii method derived from Thermal Explosion Theory had been applied to forecast the critical ignition temperature and ignition delay time for large-scale industrial storage from smaller laboratory scale experiments. Non-negligible error was detected when extrapolating to industrial volume especially for the ignition delay time and appropriate recommendation was made as a possible remedy. Emissions when biomass smouldered and critically ignited that happened at 10˚C apart were examined with a three-stage emission sampling and compared, with the aims of obtaining a suitable biomass self-ignition indicator. Detailed studies were required since only one organic compound was detected to be consistently different between smouldering and critically-igniting biomass dust. Within this small temperature difference, different volatile species with respective intensities had been modelled with FG-BioMass software. Towards the end of this work, conclusions were drawn for each section and suggestion of combining both pre-treatments with binder addition were recommended for further studies. The work in the thesis provides a large data-set which will help inform power plant operators in their dust management risks. The laboratory-scale experiments give a useful risk-ranking for dust layer ignition, but uncertainties in ignition-delay times, especially for large biomass quantities, indicate that improvements are required to BS EN 15188 (biomass storage test) to enable scaling-up with more certainty.
22
Takahashi, Masaru. "PREDICTIVE VALIDITY OF THE YOUTH LEVEL OF SERVICE/CASE MANAGEMENT INVENTORY AMONG JAPANESE JUVENILE OFFENDERS". OpenSIUC, 2010. https://opensiuc.lib.siu.edu/theses/318.
Resumo:
The main purpose of the present study is to examine the predictive validity of the Youth Level of Service/Case Management Inventory (YLS/CMI) to Japanese juvenile offender population. Three hundred and eighty-nine juveniles who were released from the five Juvenile Classification Homes (JCHs) were followed for more than one year on average. Results demonstrate that those who show higher score on the YLS/CMI are more likely to recidivate than those who are not. A total score of the YLS/CMI also significantly contributes to predict faster time to recidivate. Furthermore, the superiority of actuarial risk measures over clinical risk judgment is confirmed. The overall findings support the applicability of the YLS/CMI among Japanese juvenile offenders. Practical implications and limitations to the current study are also discussed.
23
Resurreccion, Joanna Z. "Stochastic Inventory Modeling and Integration to Multi-criteria Risk Decision-making for Interdependent Economic and Infrastructure Systems". Thesis, The George Washington University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3557345.
Resumo:
Extreme risks associated with natural and man-made disasters involve disruptions in the production of goods or provision of services in interdependent systems. The reduced supply of critical goods and services will degrade "as planned" production outputs and create ripple effects of direct and indirect disruptions. Input-output modeling evaluates the propagation of disaster consequences by quantifying the associated economic risks of disruption, namely economic loss and inoperability, for multi-sectoral economic regions. The thesis enhances the reliability of these risk estimates by formulating a stochastic inventory-based risk assessment model using a multi-objective optimization framework for minimizing (i) economic losses, and (ii) sector inoperability. The research utilizes inventory-to-sales ratio data from the Bureau of Economic Analysis for modeling uncertainty in the levels of finished goods inventory and the beta distribution to integrate uncertainty in decision-maker preferences associated with the multi-objective framework. The framework focuses on the development of a holistic, flexible and scalable decision support system through a Dynamic Cross Prioritization Plot (DCPP) for identifying inventory enhancement opportunities among critically disrupted systems that is applicable to different regions and disaster scenarios.
24
Harris, Joneel J. "Use of the College Student Inventory to Predict At-Risk Student Success and Persistence at a Metropolitan University". Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc2436/.
Resumo:
Using Tinto's longitudinal model of institutional departure as the theoretical basis for this research, the purpose was to determine what extent selected motivational factors measured by the College Student Inventory (CSI) predict academic success and persistence of at-risk students at the University of North Texas (UNT). The study focused on United States citizens and permanent residents entering UNT as at-risk first-time freshmen admitted via individual approval for the fall 1994 semester. The 409 subjects were enrolled in a developmental course titled Personal and Academic Effectiveness where the CSI was administered during the first 2 weeks of class. Selected predictor variables were tested in relation to the separate criterion variables of grade point average and enrolled status during the 2nd and 4th years of the study. Grade point averages and enrollment data for the 1995-96 and 1997-98 academic years were extracted from the student information management system. The research design employed appropriate multiple regressions, multiple correlations, multiple discriminant analyses, and bivariate correlations. Findings confirmed the ability of five CSI factors to predict grade point average (p < .05) of at-risk students over the time frames used in this study. Nine factors predicting enrolled status were also significant at the .05 level; however, results were not meaningful in the 2nd year as factors classified 95% of all subjects as persisters. By the end of the 4th year, the factors were able to predict correct classification of both persisters and nonpersisters approximately 24% better than chance. This research provides support for Tinto's institutional departure model, particularly associated with pre-entry attributes and goals/commitments over time. The CSI is a viable instrument for use with at-risk first-time freshmen at a metropolitan university; however, required enrollment in a developmental course likely confounded the ability of selected variables to meaningfully predict enrolled status during the 2nd year.
25
Bharadwaj, Ujjwal R. "Risk based life management of offshore structures and equipment". Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/8554.
Resumo:
Risk based approaches are gaining currency as industry looks for rational, efficient and flexible approaches to managing their structures and equipment. When applied to inspection and maintenance of industrial assets, risk based approaches differ from other approaches mainly in their assessment of failure in its wider context and ramifications. These advanced techniques provide more insight into the causes and avoidance of structural failure and competing risks, as well as the resources needed to manage them. Measuring risk is a challenge that is being met with state of the art technology, skills, knowledge and experience. The thesis presents risk based approaches to solving two specific types of problem in the management of offshore structures and equipments. The first type is finding the optimum timing of an asset life management action such that financial benefit is maximised, considering the cost of the action and the risk (quantified in monetary terms) of not undertaking that action. The approach presented here is applied to managing remedial action in offshore wind farms and specifically to corroded wind turbine tower structures. The second type of problem is how to optimise resources using risk based criteria for managing competing demands. The approach presented here is applied to stocking spares in the shipping sector, where the cost of holding spares is balanced against the risk of failing to meet demands for spares. Risk is the leitmotiv running through this thesis. The approaches discussed here will find application in a variety of situations where competing risks are being managed within constraints.
26
Atkins, Carina T. "Initial Drug Court Risk Assessment Scores and Probationers' Completion of Drug Court Programs". ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/5823.
Resumo:
Drug offenders continue to cost citizens and governments money, while drug courts attempt to rehabilitate offenders and reduce recidivism. The Level of Service Inventory-Revised (LSI-R) is a risk assessment tool used by courts and probation offices to determine needs and risks of offenders, and often determine levels of supervision. The purpose of this quasi experimental study was to determine if there is a statistically significant association between the initial LSI-R scores of offenders entering drug courts and their successful completion of the drug court program. Therapeutic jurisprudence theory, the theoretical framework for this study, suggests that the courts and the law are therapeutic to people and that drug treatment will promote positive behavior changes for the offenders. Data for this study were acquired from a database provided by a Kansas drug court, including initial LSI-R scores, completion records, and demographics of 210 drug court participants. A one-way ANOVA was used to test the hypotheses. Significant statistical results were found, indicating that drug court success was positively associated with the LSI-R score. The study may lead to social change by providing information about participants, most likely to benefit from drug court programs, which will save governments money and make room in the programs for more successful candidates, thus producing more productive citizens in the community.
27
Macaluso, Roberto, e Ida Mattsson. "Youth Psychopathic traits Inventory : kriminella handlingar och attityder till kriminellt beteende bland gymnasieungdomar". Thesis, Högskolan Väst, Avd för psykologi och organisationsstudier, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-6048.
Resumo:
Inventory (YPI), kriminella handlingar och attityder till kriminellt beteende bland gymnasieungdomar. En frågeställning som undersöktes i studien var, om det fanns något samband mellan YPI personlighetsdrag och kriminella handlingar. Ytterligare en frågeställning som undersöktes var om det fanns några könsskillnader i attityder gentemot kriminellt beteende. Studien utfördes med en kvantitativ datainsamlingsmetod, vilken genomfördes via tre frågeformulär. De tre frågeformulären somanvändes i studien var ett egetkonstruerat frågeformulär, Youth Psychopatich traits Inventory (YPI), vilket är ett självskattningsformulär, och ett modifierat frågeformulär från Brottsförebyggande rådet. Datan som samlades in var från 108 gymnasieungdomar i åldrarna 15-19 år, därav 34 killar och 56 tjejer. Resultaten visade på att det personlighetsdrag som var relativt högst självskattat i den undersökta gruppen var thrill-seeking. Resultaten visade även att det fanns positiva medelstarka signifikanta samband mellan fem av YPI variablerna (manipulation, remorselessness, thrill-seeking, impulsiveness, irresponsibility) och kriminella handlingar. Ytterligare resultat som studien visade var att fler killar än tjejer hade gjort någon eller några kriminella handlingar. Killarnas attityder var mer liberala gentemot kriminella handlingar än tjejernas, vilket även stöds av tidigare forskningThe purpose of the study was to examine personality traits according to the Youth Psychopathic traits Inventory (YPI), criminal acts and attitudes towards criminal behavior among high school students. One of the questions that have been examined in the study is if there is any correlation between young people that have been involved with criminal acts and young people that have YPI personality tendencies. Another question investigated in the study was if there are gender inequities between boys and girls with regard to the attitudes towards criminal behavior. The study was conducted through a survey that included three questionnaires. The results were compiled and compared and then analyzed using a computer-based algorithm. The three questionnaires that were used in the study were a self-constructed survey, the Youth Psychopathic traits Inventory (YPI) and finally one modified Crime prevention council-BRÅ survey. The test group consisted of 108 upper secondary youth between the ages of fifteen and nineteen. The 108 participants included 34 boys and 56 girls. The result clearly showed that the psychopathic tendencies that were represented amongst the youth in the study are thrill-seeking based. The results also showed strong significant correlation between five of the YPI, variables (manipulation, remorselessness, thrill-seeking, impulsiveness, irresponsibility and criminal acts. The study also showed that more boys than girls had been involved in criminal acts of some kind. The attitudes of the boys in the study showed that they had a more liberal views regards to criminal acts than the girls, which is supported in previous research
28
Kopp, Mindee. "A follow-up study on primary prevention of child abuse the development of the Children's Parenting Inventory (CPI) to identify high-risk parenting attitudes among at-risk middle school children /". Menomonie, WI : University of Wisconsin--Stout, 2005. http://www.uwstout.edu/lib/thesis/2005/2005koppm.pdf.
29
Cline, Kimberly L. "Identifying protective and risk factors in mothers of developmentally disabled children an assessment of their coping ability and strategies /". Theological Research Exchange Network (TREN), access this title online, 2006. http://dx.doi.org/10.2986/tren.088-0139.
30
Dagberg, Alexandra, Alexander Thorén, Giovanni Tozzi e Kalin Velichkov. "Minimizing the risk of material shortage and waiting times via an improved order to delivery process : A study conducted within IV Produkt in Växjö". Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-26450.
Resumo:
~ 3 ~ Abstract Master Program in Business process and Supply Chain Management Degree Project in Logistics 15 hp, Course 4FE06E Authors: Alexandra Dagberg, Alexander Thorén, Giovanni Tozzi, Kalin Velichkov Tutor: Roger Stokkedal Examiner: Helena Forslund Title: “Minimizing the risk of material shortage and waiting times via an improved order to delivery process – A study conducted within IV Produkt in Växjö” Background: Inventory Management activities have gained a relevant importance over the time in reducing uncertainties at both upstream as well as downstream levels of the supply chain, allowing a smooth material flow between chain members while responsively meeting customer demand. Control activities over the inventory represent a challenged and controversial aspect for most of today’s companies, including IV Produkt. Problem discussion: IV Produkt has, due to the rapid growth during the last ten years, fallen behind the area of inventory management as well as internal material handling process. The reason is that the company has not been able to develop these functions with the same pace as the economic growth. Consequently, the firm is facing difficulties to efficiently supply assembly lines, causing material shortage and waiting times. Research questions: RQ1: - How is the order to delivery process, from material supply functions to the Assembly line 2, at IV Produkt built up today? RQ2: - How can the order to delivery process of raw material and semi-finished products, between material supply functions and the Assembly line 2, be improved in order to minimize the risk of material shortage and waiting times? RQ3: - How can the physical storage of raw material and semi-finished products be structured within the studied area in order to support RQ2? Method: This thesis represents a descriptive case study conducted via a positivistic perspective and a deductive approach. Data was collected by interviews, observations and questionnaires, as well as via academic literature procured via a research in Linnaeus University’s library and via the use of approved web databases. Results are based on quantitative data collected from the studied company, guaranteeing the scientific credibility of the thesis. The respect of ethical principles were ensured by a discussion with company to mutually agree on the confidentiality of the presented information. Conclusion: The conclusion shows how the studied order to delivery process is built up today, highlighting several kind of waste in the current material and information flows. As a result, several actions, such as an extended use of the data system, the application of Kanban and the implementation of the ABC logic, in combination with a new proposed storage layout, were identified and proposed in order to minimize the risk of material shortage and waiting times.
31
Markebjer, Susanne K. A., e Carina Holst. "PERSONLIGHETSFAKTORER OCH RISKY BUSINESS : Vilka personlighetsfaktorer är kopplade till individers riskbenägenhet?" Thesis, Stockholms universitet, Psykologiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-58717.
Resumo:
Personlighetsfaktorerna har betydelse för hur mycket risker individer tar. Syftet med denna studie är att undersöka om det finns ett samband mellan personlighetsfaktorerna enligt femfaktormodellen och graden av generell riskbenägenhet. Mycket av tidigare forskning har kopplat personlighet till domänspecifikt risktagande som hälsa, ekonomi och arbete, medan denna studie undersöker kopplingen till generell riskbenägenhet i vardagen vilket kan vara att välja ett okänt resmål eller att söka till en ny universitetsutbildning. 189 undersökningsdeltagare i olika åldrar och från olika yrkesgrupper besvarade en enkät bestående av två olika tester, den svenska versionen av the Big Five Inventory (BFI) och en svensk översättning av the Risk Propensity Scale (RPS). Resultatet visar på ett signifikant samband mellan fyra av de fem personlighetsfaktorerna enligt femfaktormodellen och en ökad riskbenägenhet, nämligen Öppenhet, Samvetsgrannhet, Utåtriktning och Vänlighet. Däremot fanns ingen signifikant korrelation mellan personlighetsfaktorn Neuroticism och riskbenägenhet.
32
Franklin, Kristel. "A Landslide Risk Management Approach for the Stillwater to Ngakawau Rail Corridor (SNL96 to 126km) in the Lower Buller Gorge, New Zealand". Thesis, University of Canterbury. Geologocial Sciences, 2012. http://hdl.handle.net/10092/6573.
Resumo:
This thesis has examined the 30km long rail corridor through the Lower Buller Gorge, on the Stillwater Ngakawau Line, between SNL96 and 126km, using a landslide risk management approach. The project area is characterised by high annual rainfall (>2,000mm per year), and steep topography (slopes typically ≥20°) adjacent to the rail corridor. The track formation generally follows the natural contour near the base of the hillslope through the Lower Buller Gorge, and consequently involves many curves but relatively limited cut slopes into adjacent rock outcrops. The distance between the base of adjacent hillslopes and rail is frequently <2m horizontally.
A variety of basement and Tertiary lithologies are present, including granite, breccias, indurated sandstone/mudstone, and limestone. The primary focus of this thesis has been on upslope-sourced landsliding onto the rail corridor, and on two short lengths (20m and 450m) that currently have a 25km/hour speed restriction imposed at Whitecliffs and Te Kuha respectively. Rainfall-induced and earthquake-generated landslide triggering mechanisms were examined in detail.
A landslide inventory has been compiled to determine the characteristics and distribution of identified slope failures over time, and to establish any correlation with topography and geology. Sixty individual landslide events were identified since the line became fully operational in the 1940s, based on desktop reviews, and field inspections for more recent events. To reflect the presence of small magnitude landslide events, a project-specific logarithmic classification of landslides was adopted from <10m³ (very small volume) to ≥10,000m³ (very large volume). An absence of a higher proportion of ‘very small’ to ‘small’ landslide volumes (<100m³) in the inventory reflects incomplete reporting of these comparatively lower magnitude, but higher frequency, events. The establishment of a robust landslide inventory to document future events, in a consistent and readily accessible format, is required for continued monitoring and review of landslide risk management practices in the Lower Buller Gorge.
Combining landslide inventory data and physical characteristics of the project area enabled the development of a qualitative landslide zonation map that assigned ‘high’, ‘high-moderate’, ‘moderate’ and ‘low’ landslide susceptibility classes. The principal area of slope instability above the rail corridor is 22.5km in length between SNL103.5 and 126.0km, associated predominantly with basement lithologies (Tuhua Granite; Hawks Crag Breccia; Greenland Group). The most frequently occurring landslides are shallow, typically less than 3m deep, translational failures triggered in regolith or colluvium materials. Rainfall-induced debris slides and flows are dominant, given the high annual rainfall and associated high frequency of high intensity or long duration rainfall events. Very small to medium landslides (<1,000m³) have the potential to impact the rail corridor with an average frequency of around one every two years, causing damage to infrastructure or affecting rail operations. Very large landslides (≥10,000m³) can be expected every 10 to 20 years based on a limited historical record. The narrow rail corridor and absence of sufficient catch areas above or adjacent to the rail causes continual operational challenges due to upslope-sourced landslide debris, and high susceptibility to slope failures, particularly west of SNL103.50km. Development of a rainfall-threshold for proactive inspection of the rail corridor is recommended, including the establishment of a rain gauge network through the Lower Buller Gorge.
Earthquake-generated landslides significantly impacted the rail during the magnitude 7.1 Inangahua earthquake in 1968 and to a much lesser extent during the magnitude 6.1 Westport earthquake in 1991. The rail was not fully constructed through the Lower Buller Gorge at the time of the magnitude 7.8 Buller (Murchison) Earthquake in 1929, which generated widespread landsliding in the Buller and Nelson regions. Earthquake-generated landsliding can be expected through the Lower Buller Gorge from earthquakes of magnitude ≥6, and track inspection is recommended in the event of magnitude 5 or greater earthquakes.
Detailed geological characterisation and mapping at Whitecliffs and Te Kuha was conducted, including a LiDAR survey at Whitecliffs that enabled visualisation of the ground surface without the interference of vegetation. The limestone outcrop at Whitecliffs comprises 60-70m high near-vertical cliffs with a well-established talus apron at the base, extending to the rail corridor. Three widely spaced open fractures sets are present at the top of Whitecliffs that propagate into the cliff-face. There has been no detectable movement on selected key fracture sets since monitoring commenced in 1993 and there is no confirmed evidence of large-scale cliff collapse during the 1968 Inangahua earthquake. Whitecliffs is not as susceptible to failure as other slopes inspected in the project area due to structural controls, primarily being the dipping of strata back into the cliff-face and widely space joint sets. Establishment of inspection protocols for earthquake events impacting the area, including real-time monitoring of selected fractures at Whitecliffs is recommended.
A 2km-length corridor site model produced for Te Kuha demonstrated ‘high’ landslide susceptibility is not confined to slopes above the existing 450m speed restriction zone. Removal of the speed restrictions at Whitecliffs and Te Kuha can be considered, as the increased exposure time is not considered sufficient justification given the extent of other susceptible areas to landsliding affecting the Lower Buller Gorge rail corridor.
The principal conclusion from this thesis project is that there is on-going risk to rail operations predominantly from shallow translational landsliding in regolith-colluvium materials. The majority of these will be generated by long-duration or intense rainfall events. Development of threshold-based methods for effective track management is recommended, including the establishment of a rain gauge network through the Lower Buller Gorge, and landslide inventory database. Site-specific engineering measures could be adopted, such as catch benches or avalanche-type shelters, where justified on a cost-benefit basis.
33
Maihani, Binti Ismail. "PUBLIC HEALTH RISK BASED PRIORITIZATION OF HAZARDOUS AIR POLLUTANTS FROM INDUSTRIAL SOURCES : A CASE STUDY FOR A PETROLEUM REFINERY IN SOUTHEAST ASIA". Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263643.
34
Terciyanli, Erman. "Alternative Mathematical Models For Revenue Management Problems". Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610711/index.pdf.
Resumo:
In this study, the seat inventory control problem is considered for airline networks from the
perspective of a risk-averse decision maker. In the revenue management literature, it is generally
assumed that the decision makers are risk-neutral. Therefore, the expected revenue is
maximized without taking the variability or any other risk factor into account. On the other
hand, risk-sensitive approach provides us with more information about the behavior of the
revenue. The risk measure we consider in this study is the probability that revenue is less
than a predetermined threshold level. In the risk-neutral cases, while the expected revenue
is maximized, the probability of revenue being less than such a predetermined level might
be high. We propose three mathematical models to incorporate the risk measure under consideration.
The optimal allocations obtained by these models are numerically evaluated in
simulation studies for example problems. Expected revenue, coefficient of variation, load factor
and probability of the poor performance are the performance measures in the simulation
studies. According to the results of these simulations, it shown that the proposed models can
decrease the variability of the revenue considerably. In other words, the probability of revenue
being less than the threshold level is decreased. Moreover, expected revenue can be increased
in some scenarios by using the proposed models. The approach considered in this thesis is especially proposed for small scale airlines because risk of obtaining revenue less than the
threshold level is more for this type of airlines as compared to large scale airlines.
35
Pranoto, Yudi. "Effects of Human Decision Bias in Supply Chain Performance". Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7545.
Resumo:
Studies in newsvendor decision-making have shown that human decisions systematically deviate from analytical solutions found in many utility models of the single period problem (SPP). Yet for the most part the impacts of this human decision bias in systems of newsvendor type products have not been investigated. We study bias in human decision-making to determine how different factors affect the performance of systems of newsvendor type products.
We extended the state of the arts utility models of SPP to analyze the effects of individuals wealth on individual decision-making. Our theoretical and empirical results proved that individuals wealth significantly affected individual decision-making. Specifically, our analysis concluded that wealthier individual ordered more than poorer individual did when presented with the same investment opportunity.
We created a human decision bias (HDB) model to include different newsvendor ordering policies that individuals could use to determine their order quantities. This model is set up to investigate individuals reliance on different ordering policies under different experimental conditions.
We designed multi period newsvendor experiments to study effects of factors such as item profit margin, wealth, value of learning, and salvage value on decision-maker's order quantity. We found that wealth and profit margin factors significantly affected individual newsvendor decision-making. Learning, gender, and salvage value factor did not exhibit significant effects in our empirical studies.
We designed multi period multi echelon newsvendor experiments to study effects of factors such as the relationship between newsvendors, item profit margin, and newsvendors' wealth on the performance of two-echelon newsvendors system. We found item profit margin, wealth, and relationship between supplier and retailer to significantly affect newsvendor decision-making. Finally, we present a case study of US fresh produce industry to illustrate the impacts of human decision bias on the performance of a supply chain system.
36
Strand, Joel, e Louise Strandänger. "A case study on how an e-tailer can use a multiple criteria ABC analysis to identify risk in the selection of suppliers". Thesis, Linköpings universitet, Produktionsekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129523.
Resumo:
Purpose – The purpose of this master thesis is to explore how an e-tailer selling bulky items can use a multiple criteria ABC analysis to make its purchasing process more effective, while balancing richness and reach, with the performance measurements of profitability, total asset turnover and inventory turnover. The purpose will be accomplished through a single case study on an e-tailer active on the Swedish furniture and home furnishing market. Methodology – This thesis applies a multiple criteria ABC-analysis to a single case study. The approach is semi-deductive as theory is combined with interviews on how to match and adapt theory about inventory control and purchasing with the specific requirements of an e-tailer selling bulky items. Findings – This thesis has resulted in a set of recommendations that aim to make the purchasing process of an e-tailer more effective. That is, capital and inventory space will be better allocated to the e-tailer’s more profitable items. Among other things, this thesis shows how dead articles can be identified and how a purchaser can prioritize more profitable articles over less profitable ones when making procurement decisions. The other recommendations are for the e-tailer to investigate the possibilities of decoupling the supply chain by keeping stock at the suppliers’ premises, to match the supplier reliability with their importance in the supply chain, and lastly to explore possibilities of drop shipment. Further, the main finding is that a comparison between the A-, B-, and C-classes and the reliability of the suppliers, highlights a gap and a possible risk. Put differently, the importance of a specific item for the business should be reflected in the choice of supplier and the multiple criteria ABC analysis is the tool to illustrate the importance. Keywords – E-commerce, E-tailer, richness, reach, transaction cost, ABC analysis, multiple criteria ABC, MCABC, inventory turnover ratio, supplier selection, purchasing Paper type – Masters thesisSyfte – Syftet med detta examensarbete är att undersöka hur en e-handelsdetaljist som säljer skrymmande artiklar kan använda en flerdimensionell ABC-analys för att göra sin inköpsprocess mer effektiv och balansera richness och reach, med mätetal som lönsamhet, kapitalomsättningshastighet och lageromsättningshastighet. Syftet kommer att uppfyllas genom en fallstudie på en e-handelsdetaljist verksam på den svenska möbel- och heminredningsmarknaden. Metod – Denna fallstudie använder sig av en flerdimensionell ABC-analys. Tillvägagångssättet är semi-deduktivt då intervjuer och teori om hur lagerstyrning och inköp kan matchas och anpassas till ett företags specifika behov. Resultat – Den här uppsatsen har resulterat i en rad åtgärder som syftar till att göra en ehandlares inköpsprocess mer effektiv. På så vis att kapital och lageryta bättre allokeras till ehandlarens lönsamma artiklar. Bland annat visar den här uppsatsen hur döda artiklar kan identifieras och hur inköparen kan prioritera mer lönsamma artiklar över olönsamma vid inköp. De andra åtgärdena handlar om att undersöka möjligheter att frikoppla försörjningskedjan genom att lagra produkter hos leverantören, att matcha leverantörernas pålitlighet och deras betydelse i försörjningskedjan, och slutligen att utforska möjligheter att utöka drop shipment. Det främsta bidraget är att eventuella felprioriteringar och risker blir tydliga genom en jämförelse mellan A-, B- och C-klasserna och leverantörernas pålitlighet. Med andra ord bör den affärsmässiga inverkan som respektive artikel har på e-handlarens resultat avspegla sig i valet av leverantör. En flerdimensionell ABC-analys kan användas för att påvisa respektive artikels affärsmässiga inverkan. Publikationstyp – Examensarbete för utbildning till civilingenjör (masteruppsats).
37
Flores, Anthony W. "Examining the Youth Level of Service/Case Management Inventory in the Context of Reliability, Validity, Equity, and Utility: A Six-Year Evaluation". University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1380612886.
38
Eroglu, Fatma Esra. "Service Models For Airline Revenue Management Problems". Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613490/index.pdf.
Resumo:
In this thesis, the seat inventory control problem is studied for airlines from the perspective
of a risk-averse decision maker. There are only a few studies in the revenue
management literature that consider the risk factor. Most of the studies aim at finding
the optimal seat allocations while maximizing the expected revenue and do not take
the variability of the revenue and hence a risk measure into account. This study aims
to decrease the variance of the revenue by increasing the capacity utilization called
load factor in the revenue management literature. In addition to expected revenue,
load factor is an important performance measure the state companies work with. For
this purpose, two types of models with load factor formulations are proposed. This
thesis is the first study in the revenue management literature for the airline industry
that uses the load factor formulations in the mathematical models. It is an advantage
to work with load factor formulations since the models with load factor formulations
are much easier to formulate and solve as compared to other risk sensitive models in
the literature. The results of the proposed models are evaluated by using simulation
for a sample network under different scenarios. The models we propose allow us to control the variability of revenue by changing the used capacity of the aircraft. This
is at the expense of a decrease in the revenue under some scenarios. The models we
propose perform satisfactorily under all scenarios and they are strongly recommended
to be used especially for the small-scale airline companies and state companies and
for scheduling new flights even in large scale, well established airline companies.
39
O'Shea, Thomas A. "Using an Inventory of Unstable Slopes to Prioritize Probabilistic Rockfall Modeling and Acid Base Accounting in Great Smoky Mountains National Park". Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3952.
Resumo:
An inventory of unstable slopes along transportation corridors and performance modeling are important components of geotechnical asset management in Great Smoky Mountains National Park (GRSM). Hazards and risk were assessed for 285 unstable slopes along 151 miles of roadway. A multi-criteria model was created to select fourteen sites for two-dimensional probabilistic rockfall simulations and Acid Base Accounting (ABA) tests. Simulations indicate that rock material would likely enter the roadway at all fourteen sites. ABA test results indicate that influence of significant acid-producing potential is generally confined to slaty rocks of the Anakeesta Formation and graphitic schist of the Wehutty Formation. The research illustrates an approach for prioritizing areas for site-specific investigations towards the goal of improving safety in GRSM. These results can help park officials develop mitigation strategies for rockfall, using strategies such as widening ditches and encapsulating acidic rockfall material.
40
Heitfeld, Michael, Frank Denys, Marije Schouwstra, Johannes Klünker, Peter Rosner e Jaap Spaans. "Spätfolgen des Steinkohlenbergbaus in Südlimburg/Niederlande: Bestandsaufnahme und Prognosen". Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2017. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-228512.
Resumo:
Das niederländische Wirtschaftsministerium hat 2014 eine umfassende Studie über alle zukünftig noch sicherheitlich relevanten Themenbereiche des Nachbergbaus für das Südlimburger Steinkohlenrevier beauftragt. Der Bergbau wurde hier bis 1974 stillgelegt; der Grubenwasseranstieg ist aber aufgrund der hydraulischen Verbindungen zu dem erst in 1992 stillgelegten Aachener Steinkohlenrevier noch nicht abgeschlossen. Der Auftrag wurde an ein deutsch/niederländisches Projektteam vergeben, das sowohl detaillierte Kenntnisse der regionalen Hydrogeologie besitzt als auch eine Bearbeitung von Fragestellungen im Zusammenhang mit Risiken durch bergbauliche Hinterlassenschaften auf dem aktuellen Stand der Technik und nach neuesten Forschungsergebnissen gewährleisten konnte. Auf der Grundlage einer umfassenden Bestandsaufnahme sowie einem regionalen Grundwassermodell wurden eine Risikobewertung vorgenommen und Konzepte für Maßnahmen und ein Monitoring erarbeitet. Die Studie wurde Ende 2016 veröffentlicht; der vorliegende Beitrag liefert eine Zusammenfassung der Ergebnisse und EmpfehlungenThe Ministerie van Economische Zaken (EZ) of the Netherlands in 2014 initiated the project „Na-ijlende gevolgen steenkolenwinning Zuid-Limburg“ and commissioned a comprising study considering all future safety aspects with respect to the potential consequences of the former hard coal exploitation in South Limburg. The coal mines were abandoned until 1974; due to hydraulic connections to the Aachen mining district, that was abandoned in 1992, the rise of the mine water has not finished yet. The study was assigned to a German-Dutch project group with comprising references of the regional Hydrogeology as well as excellent expertise in all questions regarding risks from mining relicts. Based on a comprising inventory and a regional groundwater model a risk assessment was carried out and a concept for measures and monitoring elaborated. The study was published in 2016; the paper in hand provides a summary of the results and recommendations
41
Drenth, Cornelia Maria. "Complicated grief in the South African context : a therapeutic intervention programme / Cornelia Maria (Nelia) Drenth". Thesis, North-West University, 2008. http://hdl.handle.net/10394/2623.
42
Almaleh, Carla Maria Anselmo Hess. "Determinantes de consulta por injúria doméstica não intencional em lactentes no sul do Brasil". Universidade do Vale do Rio do Sinos, 2004. http://www.repositorio.jesuita.org.br/handle/UNISINOS/2919.
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Objetivo: Investigar os fatores associados à consulta clínica por injurias físicas domésticas não intencionais durante o primeiro ano de vida. Métodos: Estudo de corte transversal realizado em 500 lactentes, oriundos de um estudo de intervenção em famílias de baixa renda do município de São Leopoldo, que investigou a ocorrência de injúria física doméstica não intencional e sua associação a fatores socioeconômicos, demográficos e do ambiente imediato da criança. Razões de chance (RC) de consulta clinica por essas injurias foram estimadas para cada variável de exposição. Resultados: A grande maioria das crianças (86,8%) apresentou alguma injúria física doméstica não intencional durante o primeiro ano de vida e 10,9% receberam atendimento clínico subseqüente. No modelo multivariado, a chance de consulta foi o dobro para mães adolescentes, comparadas às demais (RC = 2,07; IC95%:1,01-4,25; p= 0,046); e foi 48% menor para famílias com escore na escala HOME, para organização do ambiente físico e temporal, abaixo d
Aims: To investigate risk factors for medically attended unintentional domestic injuries during the first year of life. Methods: Socioeconomic, demographic and environmental factors and unintentional domestic injury were investigated in a sweep of data collection of a intervencion study in infants in the Southern Brazilian city of São Leopoldo (n = 500). Odds ratios (OR) for medically attended injuries were estimated for each exposure variable. Results: Most of the children (86.8%) presented at least one injury during their first year of life and 10.9% received medical assistance due to those injuries. In the multivariate model, the odds of medically attended injuries was the double for children of adolescent mothers compared to the others (OR =2,07; CI95%: 1,01-4,25; p=0,046). The Odds was 48% less for families with the physical and social scale of the HOME inventory bellow the median of the sample (OR =0,52; CI95%: 0,26-1,01; p=0,054). The number of siblings showed an effect in the unadjusted model, but
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Saeed, Renas, e Petra Öberg. "KVANTITETSDIFFERENS I EN FÖRSÖRJNINGSKEDJA DÄR TILLVERKNING ÄR OUTSOURCAD". Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Industriell organisation och produktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31453.
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Purpose – The purpose of this study is to analyze a supply chain, where manufacturing is outsourced, to identify risk zones where any quantity difference could occur, the cause of quantity difference and the measures that could be taken to reduce the quantity difference. Method – In order to achieve the purpose a literature study and a case study has been carried out. The case study consisted of interviews, observations and document studies and have generated empirical data. In the analysis of the collected data a fishbone diagram has been established and pattern matching has been applied. Findings – The case company's supply chain was mapped to identify risk zones, risk factors, and measures for the risk factors. The biggest risk zones identified in the cas company was picking and the store's inventory. The risk factors that were considered to be contributing most to the quantity difference was the lack of communication, mistakes, lack of standards, lack of security and barcode scanners. The measures that have been presented are improving communication, introduction of new standards, upgrading of bar code readers, enhancing safety and eliminating the possibility of making mistakes. Implications – With the help of the proposals that the authors have developed, the identified risk factors could be counteracted. Before proposed measures are implemented, all personnel should first and foremost take part of the mapping of the supply chain to understand how things work together. Method discussion – To achieve reliable results triangulation has been used when interviews, observation and document studies have been conducted. The internal validity is considered to have been strengthened by pattern matching when empirical data has been compared with theory. Since the respondents' answers have been similar the internal validity has been further strengthened and therefore credible.Syfte – Studiens syfte är att analysera en försörjningskedja, där tillverkningen är outsourcad, för att upptäcka riskzoner där en eventuell kvantitetsdifferens skulle kunna uppstå, orsak till kvantitetsdifferens samt vilka åtgärder som skulle kunna vidtas för att minska kvantitetsdifferens. Metod – För att uppnå syftet har litteraturstudier samt en fallstudie genomförts. Fallstudien har bestått av intervjuer, observationer samt dokumentstudier och har genererat empirisk data. Vid analys av insamlad data har ett fiskbensdiagram upprättats samt mönsterpassning tillämpats. Resultat – Fallföretagets försörjningskedja kartlades för att identifiera riskzoner, riskfaktorer samt åtgärder till riskfaktorerna. De största riskzonerna som identifierades på fallföretaget var plockning samt butikslager. De riskfaktorer som ansågs vara mest bidragande till kvantitetsdifferens var kommunikationsbrist, misstag, bristfälliga standarder, brist på bevakning samt streckkodsläsare. Åtgärderna som har presenterats är förbättring av kommunikation, införande av nya standarder, uppgradering av streckkodsläsare, förhöjning av säkerhet samt eliminering av möjlighet att begå misstag. Implikationer – Med hjälp av de åtgärdsförslag som författarna har tagit fram kan de identifierade riskfaktorerna motverkas. Innan studiens åtgärdsförslag implementeras bör all personal först och främst ta del av kartläggningen av försörjningskedjan för att förstå hur aktiviteterna samverkar. Metoddiskussion – För att uppnå ett tillförlitligt resultat har triangulering använts då intervjuer, observationer och dokumentstudier har genomförts. Den interna validiteten anses ha stärkts genom mönsterpassning då empiri har jämförts med teori. Eftersom att respondenternas svar har varit likartade anses den interna validiteten stärkts ytterligare och är därmed trovärdig.
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Segerlund, Nina. "Klimatförändringarnas påverkan på massa- och pappersbruket BillerudKorsnäs i Karlsborg : Hur klimatförändringar påverkar bioreningsdammarna och avloppssystemet". Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105020.
Resumo:
Att industrier påverkar klimatet negativt var känt, men för att få veta hur klimatförändringarna fram till år 2050 kunde påverka massa- och pappersbruket BillerudKorsnäs i Karlsborg krävdes en riskinventering. Syftet var att ta reda på hur förändrad havsnivå, förändrade vindförhållande, förändrad temperatur och förändrad nederbördsmängd kunde påverka bioreningsdammarna och avloppssystemet på området. Av de fyra klimatscenarier som forskare tagit fram användes två av dessa, RCP 4,5 scenario och RCP 8,5 scenario för att jämföras med ett normalvärde. Genom en platsspecifik undersökning kunde riskerna listas och jämföras med den scenariodata som SMHI redovisade för samtliga klimatförändringar. Resultatet av riskinventeringen visade att en förändring i havsnivån hade flest risker kopplade till bioreningsdammarna och avloppssystemet. För att anpassa sig efter klimatförändringarna behövde BillerudKorsnäs i Karlsborg beakta och i framtiden bygga om vissa delar av bioreningsdammarna och avloppssystemet.It is known that industries negatively affect the climate and contribute to climate change, but to find out how climate change till year 2050 could affect the pulp and paper mill BillerudKorsnäs in Karlsborg, a risk inventory was required. The purpose was to find out how changes in sea level, changes in wind conditions, changes in temperature and changes in precipitation could affect the aerated lagoons and the sewage system at the site. Out of the four climate scenarios developed by researchers, two scenarios i.e., RCP 4,5 scenario and RCP 8,5 scenario were used in a comparison to normal conditions. Throug a site-specific study, the risks could be listed and compared with the scenario data SMHI reported for all climate changes. The results of the risk inventory illustrate that changes in sea level poses most risk to the aerated lagoons and the sewage system. In order to adapt to climate change, BillerudKorsnäs in Karlsborg needed to consider and rebuild certain parts of the aerated lagoons and the sewage system in the future.
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Makhnatch, Pavel. "Technology and Energy Inventory of Ice Rinks". Thesis, KTH, Tillämpad termodynamik och kylteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34791.
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Currently 341 ice rinks are in operation in Sweden with an estimated total energy consumption of 384 GWh/year. As it has been revealed in previous studies, most of the ice arenas are constructed and/or not operated efficiently. Thus it is considerable energy saving potential, which could be achieved in this area. The potential is even more significant if one can consider the savings in the ice rinks all over the world. This report is an in-depth study, which aims at analysing the Swedish ice rinks energy consumption and estimation of the corresponding energy saving potential. The report analyses the energy statistics obtained through the Stoppsladd study, which includes the ice rinks inventory, data collection and compilation of energy relevant data for 100 ice rinks located in Sweden. The inventory has revealed a number of important statistical figures, such as total energy consumption average in total (estimated to be 1,137 MWh/year) and for different ice arenas categories in particular. Relevant specific energy consumption values as well as a number of other important figures are also provided in the paper, thus giving an idea on the way to minimise energy consumption at each specific ice rink. The results are additionally supported by statistical multifactor regression analysis, which resulted in a relation between the ice rink’s total energy consumption and some known factors values affecting it. Two in-depth studies fulfil the Stoppsladd project by analysing water quality and ice quality effect on the ice rink’s energy consumption and investigation of the static and dynamic heat flow distribution in ice rink slab. A static heat flow distribution model of an ice rink evaluated the effect of concrete with different properties on temperature and heat flow distribution within an ice rink floor slab. The study proves that the ice rink refrigeration system COP2 could be increased with 3.5 % just implementing new high thermal conductivity concrete layer into the conventional concrete ice rink floor. The static analysis results were further completed with dynamic analysis, which adequately reflects the thermodynamic response of the concrete ice rink floor to a varying heat load. As a result, the thesis represents a holistic approach to the ice rink energy efficiency increase problem and provides a good basis for further studies in relevant areas. It is proved that modified concrete allowing higher (efficient) secondary refrigerant temperatures and also provides better response to change in heat load to the system.Stoppslad
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Steuerwald, Brian L. "Identifying schizotypal personality disorder using the Rust Inventory of Schizotypal Cognitions (RISC)". Virtual Press, 1990. http://liblink.bsu.edu/uhtbin/catkey/722235.
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Schizotypal Cognitions (RISC) were related to interview derived ratings of DSM-III-R schizotypal personality disorder and other personality disorders in a non-clinical college sample was examined. Moderate correlations between the RISC and schizotypal scores, but not between the RISC and other personality disorders, provided support for the validity and suggested reasonable specificity for the instrument. RISC scores correlated the greatest with schizotypal symptoms that reflect a strong cognitive component (e.g., perceptual illusions) but did not correlate with symptoms associated with social adaptation or interpersonal functioning (e.g., excessive social anxiety). Cutoff scores set at approximately 2 S.D. above the RISC mean best discriminated between non-cases and cases of subthreshold and definite schizotypal personality disorder. Limitations of the RISC and suggestions for future research are discussed.Department of Psychological Science
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Vital, Maria Lucia Naime Vidal. "Programa de capacitação de estudantes de Psicologia para promoção do desenvolvimento de bebês de risco". Universidade Federal de São Carlos, 2008. https://repositorio.ufscar.br/handle/ufscar/3019.
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Previous issue date: 2008-02-29Financiadora de Estudos e Projetos
During the infant development, some risks are caused by internal and external conditions, with are dependent of the environment. Because of the lack of intervention in a troubled familiar environment or in a deficient institutional care, the babies at risk can show a damaged development. Brazilian daycare center privileges hygiene and primary care neglecting children education and their intervention. The present research intents to qualify students of Psychology College that wok with babies at risk to promote infantile development though play sessions. The collected data were extracted from intervention planning, reports and videos made during the execution of the play activities. The data referring to the babies were obtained through the application of the Operationalized Portage Inventory. The results will be compared with each individual performance during the intervention program, regarding to the students even the babies of the Inventory Portage.
Os riscos no desenvolvimento infantil podem ser originados por causas internas ou externas, entre elas as condições precárias ou adversas do ambiente. Os chamados bebês de risco são crianças que podem vir a ter o desenvolvimento prejudicado pela falta de estimulação necessária, por dificuldades no âmbito familiar, ou mesmo pelo cuidado institucionalizado deficiente. Nas creches públicas brasileiras, o foco principal ainda é o atendimento às necessidades básicas de higiene e alimentação do bebê, negligenciando-se, muitas vezes, a educação e a estimulação do desenvolvimento deste. A brincadeira como forma de estimulação do desenvolvimento infantil é alvo de diversos estudos na área por tratar-se de uma estimulação prazerosa e natural para os adultos e para os bebês. Dessa forma, o presente estudo teve como objetivo capacitar alunos das disciplinas Serviço e Intervenção em Psicologia Estimulação de Bebês de Risco em Creches , que trabalham diretamente com bebês de risco, a promover o desenvolvimento desses bebês por meio da brincadeira. Os dados referentes aos alunos foram coletados por meio de planejamentos de atividades de estimulação, registro em vídeo da execução dessas atividades e relatório das mesmas. Os dados referentes aos bebês foram obtidos pela aplicação do Inventário Portage Operacionalizado. Os resultados serão apresentados comparando-se o desempenho de cada sujeito ao longo do programa de capacitação, tanto para os alunos da disciplina Serviço e Intervenção em Psicologia, como para os bebês avaliados pelo Inventário Portage.
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Cohen, Michael Alan. "Psychometric Properties of the Nungesser Homosexual Attitudes Inventory and its Relation to Health Risks Among Gay Men". Diss., Temple University Libraries, 2014. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/256261.
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PsychologyPh.D.
Sexual minority men are at an increased risk for negative outcomes, including mental health disorders, suicide, substance abuse, and sexual risk behaviors. Internalized Homophobia (IH), roughly defined as sexual orientation-related self-hatred among gay men, has been linked to these outcomes. Since its publication in 1983, the predominant measure of IH used in psychological research has been the Nungesser Homosexual Attitudes Inventory (Nungesser, 1983). The scale is potentially dated, and there is a relative paucity of investigation into its psychometric properties; findings derived through its use may be in question. The current effort describes two studies designed to address these concerns. Study I includes a principal components analysis of the scale using data obtained from an internet sample (N = 486), resulting in suggested revisions for the broader scale, and proposed brief versions of the Self and Disclosure subscales. Study II used data obtained from a second internet sample (N = 884) to further evaluate scale structure and properties. Analyses include confirmatory factor analyses of the original scale, Shidlo's revised version (1994), the suggested alternative, and the Brief Self and Disclosure scales proposed in Study I. Of the three versions of the overall scale, the suggested alternative proposed in Study I exhibited the most favorable fit and highest item loadings. Internal consistency for the suggested alternative was equal to that of the larger NHAI and Shidlo-revised scales. External validity was evaluated through correlations with mental health and suicide, substance use, sexual risk, and orientation-based victimization. Strong results in the expected direction were found only in the instance of mental health, with negative attitudes towards homosexuality being associated with increases in depression and anxiety scores as measured by the Hospital Anxiety and Depression Scale. The suggested scale alternative and Brief Self and Disclosure scales performed similarly to the more extensive NHAI and Shidlo-revised scales, leading to a recommendation for their use in research. Finally, findings from the current effort are discussed in relation to the broader social context impacting the lives and development of sexual minority men.
Temple University--Theses
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Molina, Robles Esmeralda. "El risc de caiguda del pacient ambulatori amb malaltia crònica: Inventari de detecció de factors de risc de caiguda". Doctoral thesis, Universitat de Vic - Universitat Central de Catalunya, 2021. http://hdl.handle.net/10803/671843.
Resumo:
Aquesta tesi està orientada en tres capítols principals. En el primer capítol es descriu l’impacte d’una intervenció educativa i d’exercicis físics en la força muscular, la capacitat funcional, la percepció dolor, el benestar personal, el grau de coneixements i la conducta de foment de salut dels pacients amb malaltia renal crònica en hemodiàlisi. El segon capítol fa referència a la realització d’una revisió sistemàtica de la literatura en la qual s’identifiquen els instruments de mesura del risc de caiguda utilitzats en població adulta amb malaltia crònica i, es descriuen les seves dimensions, els factors de risc i/o els ítems que contemplen. I, en el tercer capítol es presenta el procediment utilitzat per l’elaboració d’un inventari de detecció de factors de risc de caiguda pel pacient ambulatori amb problemes de salut crònics del qual sorgeix una proposta individualitzada d’activitats de salut preventives que podria reduir les caigudes en aquest grup de població.This thesis is aimed at three main chapters. The first chapter describes the impact of an educational intervention and physical exercises on muscle strength, functional capacity, pain perception, personal wellbeing, knowledge and health promotion behavior in patients with chronic kidney disease in hemodialysis. The second chapter refers to the realization of a systematic review of the literature in which are identified the instruments for measuring the risk of fall used in the adult population with chronic disease and are described their dimensions, risk factors and /or the items they contemplate. And, in the third chapter presents the procedure used for the elaboration of an inventory of detection of risk factors of fall for outpatient with chronic illness from which arises an individualized proposal of preventive health activities that could reduce falls in this population group.
Programa de Doctorat: Cures Integrals i Serveis de Salut
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Dykstra, Brittany. "Ages of Engagement in Risk Taking and Self-Harm: An Investigation of the Dual Systems Model of Adolescent Risk Taking". TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1245.
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Risk taking (RT) and self-harm (SH) are clinically, conceptually, and empiricallyrelated, yet separate constructs, which occur most frequently during adolescence. The current study utilized retrospective reports of college students to determine reported ages of engagement in RT and SH behaviors. Reported ages were compared with predictions for ages of high frequency engagement in RT based on the Dual Systems Model of Adolescent Risk Taking (DSMART; Steinberg, 2010). The sample consisted of 228 college students, ranging in age from 18 to 48 years (mean 22.8), who completed a survey of commonly investigated RT (12 items) and SH (18 items) behaviors. A positive correlation between the RT and SH scales supported a relationship between RT and SH, as predicted. The mean ages of engagement reported for both RT and SH behaviors were significantly higher than the ages predicted by the DSMART. However, the mean ages of engagement varied significantly by behavior grouping (RT, SH), and by subgroups within each behavior group. The NSSI subgroup of SH and the Situational subgroup of RT were noted to have the lowest mean age of high frequency engagement at the subgroup and behavior item level. A relationship between RT and SH was supported and information regarding ages of engagement in RT relative to ages of engagement in SH in the sample provided a further basis for understanding the emergence of these behaviors. The findings are discussed with regard to the DSMART and the relationship between RT and SH behaviors