This master thesis deals with a concept of two columned shelf stacker’s upper beam. The first part contains a research of storage systems used in logistics and a description of the shelf stack’s basic parts. The second part is dedicated to the draft of the pulley arrangement with a rope calculation, pulleys and shafts, in the same the draft of the pulley attachment to the rope leading to the counterweights. It is followed by the concept of the couple winch drive ensues synchronized with the electronic cardan. The final part depicts the dynamic analysis of the lifting truck’s movement in the dependence on the load size and distribution respecting the dynamic effect of the counterweight act.

<p>Due to changes in the economy, the Department of Defense is requiring dramatic changes in its procurement process for major systems. These changes attempt to leverage from the large quantity of commercial software that is currently on the. market. As a result, better estimating techniques are required to properly account for software reuse. For government agencies, these techniques must be understood and applied when validating and tracking contractor performance. An industry survey was performed and subsequently two techniques were evaluated. The evaluation criteria used is consistent with the attributes of the systems engineering process. This project will evaluate the two most widely used; function point analysis and rule of thumb analysis were selected for computing the cost of a specified software intensive project.</p> / Master of Science

The purpose of this dissertation is to demonstrate a new empirical and systemic geopolitical approach to the study of the ongoing territorial dispute in the Arctic resulting from the desire of two nation states, Denmark and Russia, to extend their own northernmost limits of the Exclusive Economic Zone to the central part of the Arctic Ocean. This approach combines geographic, legal and political analytical perspectives with quantitative research design to produce an inter-disciplinary study. Empirical evidence on the long-term socio-geographic development in the region (1993-2013) is provided together with information on particular territorial gains and losses for all decision-makers that arise in a number of potential scenarios (options). Variation in each decision-maker's aggregate national socio-geographic resource, as implied by particular territorial modifications in the central part of the Arctic Ocean, serves as a basis for derivation of nontrivial payoffs on each option in the dispute. These payoffs are introduced into a three-player graph model for conflict resolution (Denmark, Russia, and the World) and stable dispute solutions are suggested on the basis of different combinations of decision-makers' strategies, whose optimality is evaluated as well. Finally, alternative scenarios of...

Background: The retail industry is one of the most competitive industries today as the emergence of the e-commerce has put significant pressure on traditional retailers. As price change frequencies have doubled, physical retailers struggle to adapt to online retailers; and as a result, new technologies for price automation such as Electronic Shelf Labels has emerged. However, as new technologies emerge managers and decision-makers need to understand the challenges with introducing novel technologies in workplaces; and what factors affect acceptance of said technology. This is an issue that is of interest as technologies are becoming mandatory in use in contrast to previous decades where they have been voluntary in use.   Purpose: To understand what factors affect employee acceptance of Electronic Shelf Labels in a mandatory environment, and thus shed light on where managers and decision-makers need to put focus when introducing new technologies in business environments.   Method: A descriptive and explanatory research design was chosen for this thesis, combined with a quantitative approach for data collection as well as data analysis. The chosen conceptual model for the thesis was the UTAUT-model upon which the questions of a self-administrated web-survey with close-ended questions was based upon. The survey was answered by employees of a market-leading Scandinavian retailer who today have Electronic Shelf Labels implemented in their stores. A total of 100 respondents answered the survey, and the results were analysed quantitatively through utilizing software such as SPSS Statistics for descriptive statistics and SmartPLS 3 for Structural Equation Modeling.   Results: The results of the SEM-analysis unveiled that the main factors impacting technology acceptance of Electronic Shelf Labels in a mandated environment are facilitating conditions and attitude towards usage. The conceptual model explained 46,4% of the variance of the model which tested the constructs of the original UTAUT-model, with slight modifications. Moreover, the results unveiled that there was a high acceptance of ESL amongst employees, and that there is positive view on the technology and its benefits.    Conclusion: Theoretical, this study contributes in a new conceptual model that explains technology acceptance in mandatory business environments where facilitating conditions and attitude towards usage are the main predictors of technology acceptance. Practically, it suggests that decision-makers and managers need to put effort in ensuring a working infrastructure around a new technology and enough resources so that employees can use the technology properly. Moreover, encouragement of a positive attitude towards a new technology is also of importance – meaning that effort should be put in highlighting the benefits of new technologies pre-implementation and having responsible available that can demonstrate this in the introductory phase of the technology.       Delimitations: The limitations of this study are mainly tied to geographical location, time and sample size. The study only considers the Swedish stores of the Scandinavian retailer that was studied, and the study is restricted in time as it takes into account the technology acceptance of Electronic Shelf Labels under a certain time frame; as a result, it is not longitudinal. Lastly, the sample size of the survey is rather small, even though satisfactory for its intended use. / Bakgrund: Detaljhandeln är en av de mest konkurrenskraftiga industrierna idag, eftersom uppkomsten av e-handel har lagt stort tryck på traditionella återförsäljare. Eftersom prisförändringsfrekvenserna har fördubblats, kämpar de fysiska detaljhandlarna för att anpassa sig till online-återförsäljare, och som ett resultat av detta har nya teknologier för prisautomatisering så som elektroniska prislappar börjat introduceras allt mer. Allt eftersom ny teknik uppstår måste chefer och beslutsfattare förstå utmaningarna med att introducera ny teknik på arbetsplatser, och vilka faktorer som påverkar acceptansen av ny teknik. Detta är ett problem som är av intresse eftersom användandet av ny teknik blir allt mer obligatorisk på dagens arbetsplatser i kontrast till tidigare år där det har varit frivilligt i bruk.   Syfte: Att förstå vilka faktorer som påverkar anställdas acceptans av elektroniska prislappar i en obligatorisk miljö och därmed belysa vad ledare och beslutsfattare behöver lägga fokus på vid införandet av ny teknik.   Metod: En beskrivande och förklarande forskningsdesign valdes för denna avhandling kombinerat med en kvantitativ ansats för datainsamling samt dataanalys. Den teoretiska modellen som valdes var UTAUT-modellen, på vilken frågorna i en självstyrd webbenkät baserades. Enkäten besvarades av anställda hos en marknadsledande skandinavisk återförsäljare som har elektroniska prislappar implementerat i majoriteten av sina butiker i dagsläget. Sammantaget sätt besvarade 100 respondenter undersökningen, varpå resultaten analyserades kvantitativt genom att använda programvara som SPSS Statistics för beskrivande statistik och SmartPLS 3 för strukturell ekvationsmodellering.   Resultat: Resultaten av den strukturella ekvationsmodelleringen avslöjade att de viktigaste faktorerna som påverkar acceptans av elektroniska prislappar i en obligatorisk miljö är underlättande förhållanden samt inställning till användning. Den konceptuella modellen förklarade 46,4% av variansen hos modellen som testade variablerna i den ursprungliga UTAUT-modellen, med vissa modifikationer. Dessutom avslöjade resultaten att acceptansen av ESL var hög bland de anställda, och att det finns en positiv syn på tekniken och dess fördelar.  Slutsats: Teoretisk sätt, bidrar denna studie till en ny konceptuell modell som förklarar teknologiacceptans i obligatoriska affärsmiljöer där underlättande förhållanden och inställning till användning är de viktigaste faktorerna som påverkar teknologiacceptans. Rent praktiskt, föreslår denna studie att beslutsfattare och chefer måste göra ansträngningar för att säkerställa en fungerande infrastruktur kring en ny teknik infinner sig, samt att tillräckliga resurser finns så att anställda kan använda tekniken på ett tillfredsställande sätt. Studien tyder även på att uppmuntran till en positiv inställning gentemot en ny teknik är av betydelse - vilket innebär att insatser bör göras för att belysa fördelarna med ny teknik inför införandet, samt att man har ansvarig personal tillgänglig som kan visa detta i framförallt de inledande faserna av implementation och användning till en början.  Avgränsningar: Gränserna för denna studie är huvudsakligen knutna till geografisk plats, tid och provstorlek. Studien har endast tagit hänsyn till de svenska butikerna i den skandinaviska återförsäljaren som studerades, och studien är tidsbegränsad eftersom det tar hänsyn till teknologisk acceptans av ESL inom en viss tidsram, på så sätt är den inte longitudinell. Slutligen är antalet respondenter av enkäten relativt liten, även om den är tillfredsställande för den avsedda analysen.

The Antarctic ice sheet is increasingly contributing to sea-level rise because of accelerated mass losses at its floating extensions -- its ice shelves. By floating while remaining attached to the grounded ice sheet, ice shelves buttress (i.e. restrain) the inland ice in such a way that ice-shelf losses lead to accelerated ice discharge in the ocean. This thesis investigates the stability of Antarctic ice shelves -- so crucial for the stability of the entire ice sheet -- using the Roi Baudouin Ice Shelf (RBIS), Dronning Maud Land, East Antarctica, as a case study. The RBIS has remained relatively stable over the last millennia and presents various kilometre-scale features (pinning point, ice-shelf channels and englacial lakes) with potential impact on its present and future stability.We first derive a horizontal velocity field, combining interferometry and speckle tracking with Synthetic Aperture Radar images from ERS 1/2 and ALOS-PALSAR, respectively. The resulting velocities and associated shear-strain rates represent the most detailed fields, currently available for the RBIS and clearly resolve small-scale features of the RBIS: significant slow-down and shearing are observed upstream of a small pinning point and ice converges at ice-shelf channels. We then combine our flow field with high-resolution elevations from TanDEM-X to infer the Basal Mass Balance (BMB) of the RBIS. This method relies on mass conservation in a Lagrangian frame and enables us to finely detect spatial variability in the BMB. We show that the BMB of the RBIS varies substantially on sub-kilometre scales. Our technique is promising and could easily be applied more widely.Additionally, the flow field is used to investigate how considering/ignoring small pinning points in observations (geometry and velocities) impacts data initialisation of poorly known parameters (e.g. basal friction, ice viscosity) and subsequent ice-sheet modelling with BISICLES. We find that overlooking the pinning point in the bathymetry leads to erroneous ice-shelf properties whereas accurately capturing the pinning point in velocities is of secondary importance. Finally, before concluding the thesis, we discuss the stability of the RBIS and its neighbouring ice shelves. Most studies agree that the ice shelf has remained stable over the last decades to millennia and would likely remain so in the absence of external forcing. We however point out to three potential triggers of instabilities: (i) large quantities of surface meltwater are formed in the grounding zone and subsequently stored on the ice shelf, thereby providing fuel for hydrofracturing; (ii) ice-shelf channels are found to significantly incise the ice inland and (iii) a bathymetric trough beneath the RBIS forms a potential gateway for warm water intrusions the ice-shelf cavity, which could destabilise the ice shelf from below. We close with a short essay on the importance of outreach, where we argue that public engagement as a scientist should be considered as being part of science and should be valued for its worth. This chapter gives us the opportunity to present outreach activities undertaken in the frame of this thesis. We conclude that, just like ice shelves control Antarctic ice losses, science communication determines transfers of scientific expertise to public knowledge. / Doctorat en Sciences / info:eu-repo/semantics/nonPublished

Thesis (Ph.D.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 1999. / Includes bibliographical references (p. 180-184). / During July and August of 1996, a large acoustics/physical oceanography experiment was fielded in the Mid-Atlantic Bight, south of Nantucket Island, MA. Known as the Shelfbreak Front PRIMER Experiment, the study combined acoustic data from a moored array of sources and receivers with very high resolution physical oceanographic measurements. This thesis addresses two of the primary goals of the experiment, explaining the properties of acoustic propagation in the region, and tomographic inversion of the acoustic data. In addition, this thesis develops a new method for predicting acoustic coherence in such regions. Receptions from two 400 Hz tomography sources, transmitting from the continental slope onto the shelf, are analyzed. This data, along with forward propagation modeling utilizing SeaSoar thermohaline measurements, reveal that both the shelfbreak front and tidally-generated soliton packets produce stronger coupling between the acoustic waveguide modes than expected. Arrival time wander and signal spread show variability attributable to the presence of a shelf water meander, changes in frontal configuration, and variability in the soliton field. The highly-coupled nature of the acoustic mode propagation prevents detailed tomographic inversion. Instead, methods based on only the wander of the mode arrivals are used to estimate path-averaged temperatures and internal tide "strength". The modal phase structure function is introduced as a useful proxy for acoustic coherence, and is related via an integral transform to the environmental sound speed correlation function. Advantages of the method are its flexibility and division of the problem into independent contributions, such as from the water column and seabed. / by Brian J. Sperry. / Ph.D.

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1982. / Microfiche copy available in Archives and Science. / Vita. / Bibliography: leaves 221-225. / by Ping-Tung Peter Shaw. / Ph.D.

Thesis (M.Sc. Agriculture (Horticulture)) -- University of Limpopo, 2022 / The most common postharvest limitation of litchi fruit is pericarp browning, which leads to consumer rejection of the solid fruit in the market even when the edible portion is not affected. Previously, sulphur dioxide (SO2) fumigation was used to control the browning and extend shelf life of litchi fruit. However, SO2 fumigation leaves undesirable residues, alters the fruit taste and may results in health hazards for consumers. An alternative method, namely, minimal processing was used to control pericarp browning and curb postharvest losses in litchi. Litchi fruit were harvested at two maturity stages (early harvest; 120 days after full bloom (DAFB), late harvest; 130 DAFB), peeled and immersed for two (2) minutes in three (3) solutions that represented treatments, namely 1) 1% citric acid 2) 1% calcium lactate and 3) a combination of citric acid and calcium lactate both at 1% measure. The untreated arils were dipped in sodium hypochloride (NaOCl) solution for 1 minute and represented the control samples. The treated arils were packed in sterilized clamshell containers and stored at 1±0.5°C and 95% relative humidity for 12 days, then held at 10±0.5°C for 2 days for shelf life study. As a result of the interaction effect of harvest stages and postharvest pre-treatments, least mass loss percentage (1.32%), juice leakage (1.8 ml per 120 g of fruit) and pH (4.18) was observed in litchi arils harvested late and treated with 1% citric acid only under cold storage. Under shelf life study, H2 control samples presented lower mass loss (2.8%) and juice leakage (4.2 ml per 120 g of fruit). At the end of cold storage, litchi arils harvested early and treated with 1% citric acid combined with 1% calcium lactate presented better tissue strength (56.0 N) and radical scavenging activity (36.6 mmol AAE/mL), while those harvested late presented higher ascorbic acid content (72.9 µg/mL), least microbial population and total colour change (3.5). However, at the end of shelf life storage, litchi arils harvested early and treated with 1% citric acid combined with 1% calcium lactate presented lower (3.1) total change in colour. Overall, harvesting the fruit late and treating with citric acid alone or combined with calcium lactate showed the potential of maintaining better aril quality with least microbial population for up to 12 days under 1±0.5°C storage, whereas harvesteing the fruit early and treating with citric acid alone or combined with calcium lactate showed the potential of maintaining better aril quality under shelf life storage. Keywords: Litchi chinesis sonn; calcium lactate; citric acid; maturity; fresh-cut. / Agricultural Research Council (ARC), National Research Foundation (NRF) and Agri-Seta

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