Darbo tikslas yra sukurti reikalavimų specifikavimo integralumą užtikrinantį metodą. Šiam tikslui įgyvendinti sukurtas procesų modelis, kurį sudaro trys pagrindiniai uždaviniai: reikalavimų identifikavimas, specifikavimas ir komponavimas. Pirmi du uždaviniai padeda identifikuoti besikertančius reikalavimus taip sumažinamas reikalavimų išsibarstymas specifikacijoje, nustatomos priklausomybės ir būtini reikalavimai. Komponavimo etapo tikslas yra sukomponuoti reikalavimus ir suteikti kūrėjams visą sistemos vaizdą bei nustatyti ir valdyti konfliktus tarp reikalavimų. Reikalavimų integralumas užtikrinamas visus reikalavimus, laikant vienoje formoje. Darbe išnagrinėti reikalavimų specifikavimo šablonai, klasifikavimo standartų bei reikalavimų valdymo įrankiai. Analizuojami besikertančių reikalavimų identifikavimo ir išgavimo strategijos. Atlikta funkcinių ir nefunkcinių reikalavimų integralumo metodų ir būdų analizė. Sukurtas šablonas reikalavimams specifikuoti, kuris apima funkcinius ir nefunkcinius reikalavimus, funkcinius ir nefunkcinius besikertančius reikalavimus. Reikalavimų valdymui sudarytas šablonas RequisitePro aplinkoje. Sukurtas MagicDraw paketo profilis, siekiant pateikti kūrėjams pilną sistemos vaizdą, atvaizduojant reikalavimų rinkinius panaudos atvejų diagramomis. Metodas patikrintas sudarant ATM sistemos reikalavimų specifikaciją, reikalavimai specifikuojami apimant funkcinius ir nefunkcinius reikalavimus, būtinus reikalavimus, funkcinius ir... [toliau žr. visą tekstą] / The aim of this work is to create A method for integrity support of requirements specification. For this purpose a process model is developed, which consists of three main tasks: the identification of requirements, specification and composition. The first two tasks helps to identify the crosscutting requirements of the following reduction the requirements dispersal in requirements specification, also identify responsibilities of requirements and identify required requirements. The goal of composition task is to compose the requirements to give the developer a view of the whole system and to identify and manage conflicts between requirements. Integrity of requirements are ensured keeping all requirements in a unique form. The paper analyzes the identification of crosscutting requirements and gathering strategies. The templates of requirements specification, standards of requirements classification and requirements management tools were analyzed. The methods and techniques of functional and non-functional requirements for the integrity were analyzed. The unique template for requirements specification was created, which includes functional and non-functional requirements, functional and non-functional crosscutting requirements. The template for requirements management was consisted in RequisitePro environment. The MagicDraw profile package was created, which provide the developer a view of the whole system, representing set of requirements for use case diagrams. The method... [to full text]

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The study sought to identify the effects of deficit irrigation on the yield and quality of tomatoes. A greenhouse experiment was conducted during the summer of 1999 and repeated in winter 2000 using nine treatments. Two threshold soil moisture deficit levels, 65% and 80% depletion of plant available water, were factorially combined with 5 irrigation timing patterns: (i) no water stress (ii) stress throughout season, (iii) stress during flowering and fruit set, (iv) stress during fruit growth and (v) stress during fruit ripening. The treatments were set up in a randomized complete block design with 4 replicates. Crop yields, maximum and minimum equatorial diameter and fruit heights were measured. The quality parameters included: soluble solids, pH and the color index. Water stress throughout the growing season significantly reduced yield and fruit size but increased the level of soluble solids. No water stress throughout the growing season or stress only during the flowering stage provided highest tomato yield.

Water management for the irrigation of containerized production remains a task reserved to a highly qualified personnel. Without proper instruments to determine the actual water needs, nursery crops can face growth losses of 20 to 30%. / Reviewing the different methods that are used in field production, tensiometer have shown the greatest potential of adaptation to potted plants. / Tests on the utilization of tensiometer were realized on two peat-vermiculite substrates, using two types of porous cup (1 bat--standard flow and 1 bar--high flow). The instruments were tested while permanently fixed in the growing medium, and temporarily fixed for three hours in the growing medium. / The results show that the instruments give excellent measurements for normal condition of growth, requiring saturation level between 50 and 100%, and that for both mode of operation. / Preferably, the choice of the instrument should be based on the hydraulic characteristics of the substrate. Little difference has been found using both instrument in the substrate 1, but in substrate 2 however, the high flow porous cups have given better response. The high flow cups have higher porosity and bigger pores that suit better substrate 2, which is made of coarser particles.

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Systems that are assembled from independently developed features suffer from feature interactions, in which features affect one another's behaviour in surprising ways. To ensure that a system behaves as intended, developers need to analyze all potential interactions -- and many of the identified interactions need to be fixed and their fixes verified. The feature-interaction problem states that the number of potential interactions to be considered is exponential in the number of features in a system. Resolution strategies combat the feature-interaction problem by offering general strategies that resolve entire classes of interactions, thereby reducing the work of the developer who is charged with the task of resolving interactions. In this thesis, we focus on resolving interactions due to conflict. We present an approach, language, and implementation based on resolver modules modelled in the situation calculus in which the developer can specify an appropriate resolution for each variable under conflict. We performed a case study involving 24 automotive features, and found that the number of resolutions to be specified was much smaller than the number of possible feature interactions (6 resolutions for 24 features), that what constitutes an appropriate resolution strategy is different for different variables, and that the subset of situation calculus we used was sufficient to construct nontrivial resolution strategies for six distinct output variables.

Advances in software engineering and programming languages have had an impact on productivity, time to market, comprehension, maintenance, and evolution of software. Low-level systems have been largely overlooked in this arena, not only because of their complexities, but also the "bare bones'" culture of this domain. This dissertation investigates the program comprehension needs of two stakeholder groups using different assembly languages: a mainframe development group and a malware analysis group. Exploratory interviews and surveys suggest that the groups' needs may be similar at a high-level. However, a detailed study involving requirements elicitation and case studies, reveals that the truth is much more complicated. As a proof of concept, we have created the AVA (Assembly Visualization and Analysis) framework, which is independent of the underlying assembly language. Despite this independence, tools within AVA could not be applied with equal efficacy, even just within these two groups. This dissertation shows that there exist fundamental differences not only in the highly-specialized nature of each group's work, but also in the assembly languages themselves. This reality necessitates a disjoint set of tools that cannot be consolidated into a universally applicable framework. / Graduate / 0984 / jebaldwin@gmail.com

Advances in software engineering and programming languages have had an impact on productivity, time to market, comprehension, maintenance, and evolution of software. Low-level systems have been largely overlooked in this arena, not only because of their complexities, but also the "bare bones'" culture of this domain. This dissertation investigates the program comprehension needs of two stakeholder groups using different assembly languages: a mainframe development group and a malware analysis group. Exploratory interviews and surveys suggest that the groups' needs may be similar at a high-level. However, a detailed study involving requirements elicitation and case studies, reveals that the truth is much more complicated. As a proof of concept, we have created the AVA (Assembly Visualization and Analysis) framework, which is independent of the underlying assembly language. Despite this independence, tools within AVA could not be applied with equal efficacy, even just within these two groups. This dissertation shows that there exist fundamental differences not only in the highly-specialized nature of each group's work, but also in the assembly languages themselves. This reality necessitates a disjoint set of tools that cannot be consolidated into a universally applicable framework. / Graduate / 0984 / jebaldwin@gmail.com

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