Typescript (photocopy). / Digitized by Kansas Correctional Industries

Typescript (photocopy). / Digitized by Kansas Correctional Industries

Call number: LD2668 .T4 1985 S566 / Master of Science

The majority of adolescents diagnosed with Major Depressive Disorder (MDD) and admitted to a psychiatric hospital in Gauteng complained of being tired of 1'talk therapy" . This study used imagery as a technique in the treatment of two adolescents suffering from MDD. The initial identification was based on the results of the Beck Depression Inventory (BDI). After a number of sessions of implementing imagery techniques, the BDI was readministered. To determine the long-term effectiveness of imagery, the BDI was again administered a month-and-a-half after completion of the sessions. The results before and after indicate a reduction in the severity of depression. The results at the month-and-a-half follow-up session indicated a further reduction in the level of depression in both cases. This indicates the long-tenn effectiveness of imagery in treating depression. Further research is required, but there are significant indications that imagery may be an effective technique in the treatment of depressed adolescents under psychiatric supervision. / Educational studies / M.Ed (Guidance and Counseling)

Thesis (MA (Psychology))--University of Stellenbosch, 2006. / Within the medical models, postpartum depression is constructed as a mental illness, that women are predisposed to during the postpartum period because of the biological and physiological changes that occur before, during and after childbirth. The present study aimed to determine whether childbirth increases the risk of developing depressive symptomatology in the first six months after delivery. The objective of the study was to examine the concept of postpartum depression by analyzing the difference in depressive symptom rates between 41 postpartum women and 254 male and female (who had not given birth in the previous six months) community members residing in a semi-rural area of South Africa. This objective was reached by using a cross-sectional survey research design. The Beck Depression Inventory (BDI) was used to elicit the quantitative data. Several independent t-tests were conducted to determine the following (i) whether low-income women three months postpartum had higher BDI scores in comparison to a combined gendered community sample, and (ii) whether low-income women six months postpartum had higher BDI scores in comparison to a combined gendered community sample. The results indicated that the postpartum women did not experience elevated rates of depressive symptoms at three months or at six months in comparison to the community sample. Men in the 2003 community sample displayed significantly higher levels of depressive symptoms than the sixmonth postpartum women. These findings do not support the assumption that childbirth predisposes women to psychological vulnerability during the postpartum period.

SCA Östrand implements an expansion of its current production of pulp. Today's 435 000 tonnes will be 900 000 tonnes when the new production line is put into operation in 2018. SCA Logistics, which is responsible for the storage and transportation of pulp would therefore like to know how much area that is currently storing pulp and if the existing surface is sufficient to cope with the increase in volume from SCA Östrand. If the surface is not enough, SCA Logistics want to know how much space will be needed to cope with the increase in volume. The study is a combined case study and design methodology. Through process mapping, various scenarios are being developed to implement the current status and future analysis where the purpose of the study can be determined by calculating the maximum area, volume and fill rate. Information has been obtained from printed literature, scientific papers, previous theses, and observations of the process in SCA Logistics in the port of Tunadal. Relevant data has been obtained from an external supervisor at SCA Logistics. The study provides answers to how much space is available at present time, the fact that the current surface will not be sufficient to cope with the increase in volume and a minimum of additional 5800 m2 surface area will be needed to store pulp on. / SCA Östrand genomför i dagsläget en expansion av dess nuvarande produktion av pappersmassa. Dagens 435 000 ton kommer dubbleras när den nya produktionslinjen tas i bruk 2018. SCA Logistics som ansvarar för lagring och transportering av pappersmassan vill således veta hur mycket yta som finns i nuläget att lagra pappersmassa på och om den befintliga ytan är tillräcklig för att klara av volymökningen från SCA Östrand. Om ytan inte räcker till, vill SCA Logistics veta hur mycket yta som kommer behövas för att klara av volymökningen. Studien är en kombinerad fallstudie och designmetodik. Genom en processkartläggning kommer olika scenarion tas fram för att genomföra en nuläges-och framtidsanalys där syftet med studien kommer bestäm-mas genom att beräkna maximal area, volym och fyllnadsgrad. Inform-ation införskaffas från tryckt litteratur, vetenskapliga artiklar, tidigare examensarbeten, samt processpromenader på SCA Logistics i Tunadals-hamnen. Relevant data erhålls från extern handledare på SCA Logistics. Studien ger svar på hur mycket yta som finns tillgängligt i nuläget, att denna yta inte kommer vara tillräcklig för att klara av volymökningen och ett minimum av ytterligare 5800 m2 behövs utöver den nuvarande ytan som finns tillgänglig.

Since the introduction of sustainable development, industries have witnessed significant sustainability challenges. Literature shows that the food industry is concerned about its need for efficient and effective management practices in dealing with perishability and the requirements for conditioned storage and transport of food products that effect the environment. Hence, the environmental part of sustainability demonstrates its significance in this industrial sector. Despite this, there has been little research into environmentally sustainable inventory management of deteriorating items. This thesis presents mathematical modelling based research for production inventory systems in perishable food supply chains. In this study, multi-objective mixed-integer linear programming models are developed to determine economically and environmentally optimal production and inventory decisions for a two-echelon supply chain. The supply chain consists of single sourcing suppliers for raw materials and a producer who operates under a make-to-stock or make-to-order strategy. The demand facing the producer is non-stationary stochastic in nature and has requirements in terms of service level and the remaining shelf life of the marketed products. Using data from the literature, numerical examples are given in order to test and analyse these models. The computational experiments show that operational adjustments in cases where emission and cost parameters were not strongly correlated with supply chain collaboration (where suppliers and a producer operate under centralised control), emissions are effectively reduced without a significant increase in cost. The findings show that assigning a high disposal cost, limit or high weight of importance to perished goods leads to appropriate reduction of expected waste in the supply chain with no major cost increase. The research has made contributions to the literature on sustainable production and inventory management; providing formal models that can be used as an aid to understanding and as a tool for planning and improving sustainable production and inventory control in supply chains involving deteriorating items, in particular with perishable food supply chains.

This thesis deals with control of stock in an inventory, focusing on inventory placement. The purpose of this thesis is to reduce the transport distance within the main stock house while gathering inventory. This will be achieved by reconstructing the inventory placement in consideration with how frequently the inventories get picked and mass of the inventory. In particular, the literature and the data that is collected from the company´s business system have laid the foundation for the thesis. In general, interviews and observations also contributed to the data collection. To fulfill the aim and to produce arbitrary results, two issues have been developed regarding which attributes that should determine the position of the inventory in the stock house and how to obtain a more effective inventory structure? The authors have jointly produced a result of suggestions for future inventory placement in terms of picking frequency and weight. Initially a situation analysis was conducted to identify known problems with the inventory´s placement and storage systems. The problems that were identified were that the inventory placement has no consideration regarding picking frequency. To determine the most frequent picked inventory an ABC analysis was conducted. All of the inventories were spread out throughout the whole stock house. To take in account, the additional criterion, which was weight, a multi-criteria analysis was performed in combination with the ABC analysis. The results of the combined analysis provided that the basis for drawing up concepts for future inventory placement. The proposal includes optimized inventory placements in different zones of the most frequently picked inventory with weight as an additional criterion. / Arbetet behandlar området lagerstyrning med inriktning på optimering av artikelplacering. Syftet med arbetet är att minska transportsträckor inom centrallagret, detta genom en omstrukturerad artikelplacering med hänsyn till plockfrekvens och tyngd. I synnerhet har litteratur samt insamlad data från företagets affärssystem lagt grunden för arbetet. I allmänhet har intervjuer och observationer också bidragit till datainsamling. För att uppfylla arbetets syfte och ta fram ett godtyckligt resultat har två frågeställningar tagits fram angående vilka attribut som bör avgöra en artikels position i lagret samt hur en effektivare lagerstruktur kan erhållas. Författarna har gemensamt arbetat fram ett resultat i form av ett förslag för framtida artikelplacering sett till plockfrekvens och tyngd. Inledningsvis genomfördes en nulägesanalys för att identifiera kända problem med artikelplacering och lagersystem. De problem som identifierades var att artikelplaceringen sker utan underlag för plockfrekvens. För att utröna de mest frekventa artiklarna genomfördes en ABC-analys. Samtliga artiklar lokaliserades utspridda över hela lagret. För att ta hänsyn till ytterligare ett kriterium, vilket var tyngd, genomfördes multikriterieanalys i kombination med ABC-analys. Resultatet av den kombinerade analysen gav underlag för att ta fram förslag för framtida artikelplacering. Förslaget innehåller optimerade artikelplaceringar inom olika zoner för de mest plockfrekventa artiklarna med tyngd som ytterligare kriterium.

High availability of a system can be achieved by performing timely replacement of degraded or failed components. To this end, spare parts are expected to be available and reordered when needed. It is not uncommon that spare parts may deteriorate on the shelf because of their physical characteristics and/or the imperfect storage and transportation conditions. Such phenomena will affect the reliability of spare parts and the availability of the system. In this dissertation, we first focus on a system with single critical operating component and one unit of deteriorating spare part. For such a system, to ensure the system availability and cost efficiency, making a joint decision on component replacement and reordering time is of vital importance. In particular, we study both failure-switching and preventive-switching strategies, where cumulative damage is considered for the spare part switching from its in-stock to operating conditions. To determine the corresponding optimal component replacement and reordering policies, the long-run average costs are minimized under a fixed lead time. It is expected that the work will benefit quite a few industry sectors, such as mining, oil and gas, and defense, where the operation of systems heavily relies on capital-intensive components. To advance the research a step further, we have relaxed the system with only a single operating component to a more complex system with multiple components. In addition, we have eliminated the limitations on the order quantity and inventory capacity. To capture the on-shelf part deterioration, a two-phase deteriorating process is adopted, for which the first phase is from the spare's new arrival to the identification of its degradation, and the second phase is the period thereafter but before the unit fails. Based on the parts' degradation states, we introduce two different replacement strategies for the spare consumption, i.e., the Degraded-First strategy and the New-First strategy. Because of the random nature of component failures and on-shelf deterioration, stochastic cost models for both DF and NF strategies are derived. With the objective of cost reduction through coordinating the inventory and maintenance policies, an enumeration algorithm with stochastic dynamic programming is employed for finding the joint optimal solution over a finite time horizon. Numerical experiments are conducted to study the impacts of these two strategies on the operation costs, and the analysis of key parameters that affect the optimal solutions is also carried out in the numerical study. The joint policies of our interest focus on both replacement and reordering of spare parts, which are more realistic and complex than those policies handling maintenance and spare parts inventory control separately. In particular: When the maintenance planning and inventory control strategy are jointly optimized, we consider the spare parts inventory experiencing on-shelf deterioration, which has not been well studied in the related literature. When dealing with a system carrying only one spare part, the impact of on-shelf deterioration of the spare part on its remaining operational lifetime is explicitly dealt with and described by the Cumulative Exposure (CE) model. For the extended model for a multi-component system, we make an early attempt to adopt a two-phase process to take into account on-shelf degradation of parts. The issues in the degradation-level-based ordering of spare parts in the multi-component system are also discussed. Several integrated cost models are developed in both systems and are used to determine the optimal replacement and reordering decisions with the objective of minimizing the expected long-run cost rate over an infinite/finite horizon.

Costs related to inventory are usually a significant amount of the company’s total assets. Despite this, companies in general don’t pay a lot of interest in it, even if the benefits from effective inventory are obvious when it comes to less tied up capital, increased customer satisfaction and better working environment. Permobil AB, Timrå is in an intense period when it comes to revenue and growth. The production unit is aiming for an increased output of 30 % in the next two years. To make this possible the company has to improve their way to distribute and handle material,The purpose of the study is to provide useful information and concrete proposals for action, so that the company can build a strategy for an effective and sustainable solution when it comes to inventory management. Alternative methods for making forecasts are suggested, in order to reach a more nuanced perception of different articles, and how they should be managed. Analytic Hierarchy Process (AHP) was used in order to give specially selected persons the chance to decide criteria for how the article should be valued. The criteria they agreed about were annual volume value, lead time, frequency rate and purchase price. The other method that was proposed was a two-dimensional model where annual volume value and frequency was the criteria that specified in which class an article should be placed. Both methods resulted in significant changes in comparison to the current solution. For the spare part inventory different forecast methods were tested and compared with the current solution. It turned out that the current forecast method performed worse than both moving average and exponential smoothing with trend. The small sample of ten random articles is not big enough to reject the current solution, but still the result is a reason enough, for the company to control the quality of the forecasts. / Kostnader kopplade till lagerverksamheten är ofta en betydande del av företagets totala omsättning. Trots detta är generella intresset för effektiv lagerstyrning lågt, trots dokumenterade fördelar som mindre bundet kapital, ökad kundservice och bättre arbetsmiljö. Permobil AB, Timrå är inne i en tillväxtfas och siktar på att öka sin produktion med mer än 30 % inom två år. För att möjliggöra detta behöver företaget förbättra sin lagerstyrning och utveckla sitt sätt att distribuera material, dels till eftermarknad och dels till sin egen montering. Syftet med studien är att bistå företaget i dess önskan att skapa en effektivare lagerstyrning med avseende på kvalitet och kostnad. Alternativa metoder att klassificera artiklar föreslogs, för att skapa en mer nyanserad bild av en artikels karaktär och hur den ska styras. Analytic Hierarchy Process (AHP) användes för att ge utvalda nyckelpersoner en chans att bestämma kriterier för hur en artikel ska bedömas. Dessa kriterier var årligt volymvärde, ledtid, uttagsfrekvens och inköpspris. Den andra metoden som föreslogs var en tvådimensionell klassificering där årligt volymvärde och uttagsfrekvens delar in befintliga artiklar i nio klasser med olika prioritering. Båda metoder gav upphov till betydande förändringar i jämförelse med den nuvarande metoden. För reservdelslagret testades alternativa prognosmetoder, för att jämföra med den nuvarande. Det visade sig att de båda metoderna glidande medelvärde och exponentiell utjämning med trend presterade bättre än den befintliga metoden. Stickprovet på 10 slumpmässigt utvalda artiklar är för litet för att förkasta nuvarande sätt att prognosticera, men det finns skäl att upprätta rutiner för kvalitetskontroll för att säkra en hög nivå på framtida prognoser.