Software being developed today can have years worth of history and hundreds if notthousands of files involved in a single project. When trying to determine what parts ofthe code need maintenance or updating it can be difficult to determine what will beproblematic in the future. Hours spent on code that will not cause problems in thefuture could be better used in other areas. Before changes are made to a codebase, themost error-prone parts of the code should be identified. In this thesis a method forcomparing what factors contribute to future bugs is developed, as well as testing severalfactors extracted from version control metadata using this method. In addition, avisualization was made using tree maps to show the most problematic files in a readablemanner, effectively using the produced data in an application to predict future bugs. Itwas determined that Age of newest change, Changes with age reducing importance andPrevious bugfixes with age reducing importance were all the most impactful factors forpredicting future bugs but that different repositories worked best with differentcombinations of the mentioned factors.

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Harlequin bugs are orange and black aggregation pheromone emitting stink bug pests, specifically of cole crops such as kale, broccoli and collards. This nearly loyal crop preference makes an interesting challenge for trapping them and helping farmers predict pest severity. Harlequin bugs can be found in much of North America, and are a serious problem in the southeastern United States. Presumably their persistence into northern regions is limited by extreme winters. In 2014 and 2015 the arctic polar vortex extended into mid-latitudes bringing a blanket of sustained sub-freezing temperatures to much of the United States. We used these events to determine effects of extreme winter weather on harlequin bug survival. In both years we observed nearly identical low temperatures of -15oC and this linked to high (80-96%) harlequin bug mortality. In the lab we measured exact lethal freezing temperatures in harlequin bugs (i.e. supercooling points) to see if a physiological metric could be used to predict overwinter survival. Harlequin bug adults froze and died at -10.4oC, and similarly, their larger juvenile stages freeze at -11.0oC. Freshly hatched harlequin bugs and unhatched eggs froze at considerably lower temperatures with eggs forming ice crystals at -23.2oC and recent hatches at -21.6oC. Now with an understanding of how harlequin bugs likely survive winter extreme, we can then work on developing a trap to tally their populations in the spring and predict summer and fall pest severity. In the lab and field, harlequin bug adults and large nymphs were more likely found on green and black colors, and statistically less frequently on yellow, white, purple or red colors with the exception of adult females, which were most attracted to red and green in the lab, but green and black in the field. To increase harlequin bug attraction to and termination at traps square corrugated plastic panels were wrapped with an insecticide netting and baited with harlequin bug aggregation pheromone, murgantiol. Bugs were effectively drawn to the panels, with green panels having significantly more dead harlequin bugs and fewer dead beneficial lady beetles (Coleoptera: Coccinellidae) at their base than yellow panels. Thus, green was chosen as the ideal trap color to use for another field experiment that evaluated three trap types -- a corrugated plastic square panel, pyramidal trap, and ramp trap -- each with three lure treatments, murgantiol alone or murgantiol plus a low or high rate of mustard oil. More bugs were killed with the pyramidal trap than with the panel trap or the ramp trap, and more bugs were killed at traps containing murgantiol combined with benzyl isothiocyanate than at those with murgantiol alone. This research demonstrated that with the proper visual elements and odors, harlequin bugs can be drawn to traps and effectively killed after contact with insecticide-incorporated netting. / MSLFS / Harlequin bugs are orange and black aggregation pheromone emitting stink bug pests, specifically of cole crops such as kale, broccoli and collards. This nearly loyal crop preference makes an interesting challenge for trapping them and helping farmers predict pest severity. Harlequin bugs can be found in much of North America, and are a serious problem in the southeastern United States. Presumably their persistence into northern regions is limited by extreme winters. In 2014 and 2015 the arctic polar vortex extended into mid-latitudes bringing a blanket of sustained sub-freezing temperatures to much of the United States. We used these events to determine effects of extreme winter weather on harlequin bug survival. In both years we observed nearly identical low temperatures of -15℃ and this linked to high (80-96%) harlequin bug mortality. In the lab we measured exact lethal freezing temperatures in harlequin bugs (i.e. supercooling points) to see if a physiological metric could be used to predict overwinter survival. Harlequin bug adults froze and died at -10.4℃, and similarly, their larger juvenile stages freeze at -11.0℃. Freshly hatched harlequin bugs and unhatched eggs froze at considerably lower temperatures with eggs forming ice crystals at -23.2℃ and recent hatches at -21.6℃. Now with an understanding of how harlequin bugs likely survive winter extreme, we can then work on developing a trap to tally their populations in the spring and predict summer and fall pest severity. In the lab and field, harlequin bug adults and large nymphs were more likely found on green and black colors, and statistically less frequently on yellow, white, purple or red colors with the exception of adult females, which were most attracted to red and green in the lab, but green and black in the field. To increase harlequin bug attraction to and termination at traps square corrugated plastic panels were wrapped with an insecticide netting and baited with harlequin bug aggregation pheromone, murgantiol. Bugs were effectively drawn to the panels, with green panels having significantly more dead harlequin bugs and fewer dead beneficial lady beetles (Coleoptera: Coccinellidae) at their base than yellow panels. Thus, green was chosen as the ideal trap color to use for another field experiment that evaluated three trap types – a corrugated plastic square panel, pyramidal trap, and ramp trap – each with three lure treatments, murgantiol alone or murgantiol plus a low or high rate of mustard oil. More bugs were killed with the pyramidal trap than with the panel trap or the ramp trap, and more bugs were killed at traps containing murgantiol combined with benzyl isothiocyanate than at those with murgantiol alone. This research demonstrated that with the proper visual elements and odors, harlequin bugs can be drawn to traps and effectively killed after contact with insecticide-incorporated netting.

I am working with software in academia for more than an decade and I had the "Moment" quite often. Palladio appeared just like an ordinary tool to solve my problem. Then, I changed a single parameter of my simulation---some hours later we hunted for a bug in the depths of Palladio. Based on the open source development model of Palladio and a very elegant structure of the source code, we were able to find the root cause of the problem very fast. To start fixing the problem, we "just" had to know when---in simulation time---a measurement of the SimuLizar simulator is valid. This paper summarizes our technical and philosophical discussions that ware needed to make Palladio deliver correct results and not to get lost in the depths of time and duration.

Thesis (doctoral)--Swedish University of Agricultural Sciences, 2003. / Thesis documentation sheet inserted. Includes appendix of four papers and manuscripts, two co-authored with Barbara Ekbom. Includes bibliographical references. Also partially issued electronically via World Wide Web in PDF format; online version lacks appendix of papers.

Call number: LD2668 .T4 1967 L59 / Master of Science

Call number: LD2668 .T4 1928 K41

2 pp. / It is increasingly common for people to report symptoms of itching and skim problems which they attribute to bug bites even when no evidence of insects can be found. Potential causes for this phenomena are identified as well as a referral to a primary care provider for diagnosis and treatment.

Submitted by Jean Medeiros (jeanletras@uepb.edu.br) on 2016-05-03T14:33:17Z No. of bitstreams: 1 PDF - Sílvia Ramos de Oliveira.pdf: 707029 bytes, checksum: fa1db830d13fafb1e53c5467e4bf2ac2 (MD5) / Approved for entry into archive by Secta BC (secta.csu.bc@uepb.edu.br) on 2016-07-25T19:30:26Z (GMT) No. of bitstreams: 1 PDF - Sílvia Ramos de Oliveira.pdf: 707029 bytes, checksum: fa1db830d13fafb1e53c5467e4bf2ac2 (MD5) / Approved for entry into archive by Secta BC (secta.csu.bc@uepb.edu.br) on 2016-07-25T19:33:19Z (GMT) No. of bitstreams: 1 PDF - Sílvia Ramos de Oliveira.pdf: 707029 bytes, checksum: fa1db830d13fafb1e53c5467e4bf2ac2 (MD5) / Made available in DSpace on 2016-07-25T19:33:19Z (GMT). No. of bitstreams: 1 PDF - Sílvia Ramos de Oliveira.pdf: 707029 bytes, checksum: fa1db830d13fafb1e53c5467e4bf2ac2 (MD5) Previous issue date: 2016-03-01 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The castor bean (Ricinus communis) is attacked by several species of insects and mites that can cause damage to your plant tissues and may limit productivity. Among these, deserve attention Corythucha gossypii (Hemiptera: Tingidae) responsible for causing severe damage to several plant species, including the castor bean. Insects, in particular, are quite vulnerable to climatic changes, since most of these organisms are ectothermic. The objective of this research was to study the impact of temperature on the development, fecundity and longevity of C. gossypii in castor beans. The study was conducted at the laboratory of Pathology and Molecular Biology of Insects from Embrapa Cotton, municipality of Campina Grande, Paraíba, Brazil in climatic chambers, adjusted to temperatures 20, 23, 25 and 28 ° C, Relative Humidity of 60 ± 10% and photoperiod of 12 hours. The following biological variables were quantified: the egg stage (duration and viability), nymph (total duration, duration of each instar, number of instars and survival); egg period the emergence of adult males and females who were sexed according to the genitalia. In adult phase were evaluated periods of pre-oviposition, oviposition, post-oviposition, longevity and fecundity. The thermal constant (K) and temperature-base (Tb) was estimated for each of the immature stages and egg to adult emergence (males and females) according Réamur Law and the X intercept method, respectively. The duration of the stages of egg, nymph and egg to adult of C. gossypii with castor bean leaves temperatures ranged between 20 ° C and 28 ° C from 17.2 to 7.6 days; From 28.5 to 10.3 days and 45.7 to 17.9 days, respectively. The duration of nymphal stages of C. gossypii with castor leaves varied within each instar, between instars and sexes according to the temperature. The development stages of the egg, nymph and egg to adult of the C. gossypii requires 86.8; 123.5 and 208.3 degree-day, respectively, above the lower thermal limit of 15.1 ° C; 15.4 ° C and 15.4 ° C. The fertility was inversely proportional to the temperature increase. The biggest longevity of C. gossypii adults with castor leaves was observed at 25 °C and the minor at 20 °C. / A mamona (Ricinus communis) é atacada por diversas espécies de insetos e ácaros que podem provocar danos aos seus tecidos vegetais e podem limitar a produtividade. Dentre estes, destaca- se Corythucha gossypii (Hemiptera: Tingidae) responsável por ocasionar danos severos a diversas espécies vegetais, incluindo a mamona. Insetos, em particular, são bastante vulneráveis às mudanças climáticas, uma vez que, a maior parte desses organismos é ectotérmica. Objetivou- se estudar o impacto da temperatura no desenvolvimento, fecundidade e longevidade de C. gossypii em mamoneira. O estudo foi conduzido no Laboratório de Patologia e Biologia Molecular de Insetos da Embrapa Algodão, município de Campina Grande, Paraíba, Brasil em o câmaras climatizadas do tipo B.O.D., ajustadas para as temperaturas 20, 23, 25 e 28 C, Umidade Relativa de 60 ± 10% e fotofase de 12 horas. Foram quantificadas as seguintes variáveis biológicas: fase de ovo (duração e viabilidade), ninfa (duração total, duração de cada ínstar, número de ínstares e sobrevivência); período de ovo à emergência de adultos machos e fêmeas, que foram sexados de acordo com a genitália. Na fase adulta foram avaliados os períodos de pré- oviposição, oviposição, pós-oviposição, longevidade e fecundidade. As exigências térmicas (K) e temperaturas-base (Tb) foram estimadas para cada um dos estágios imaturos e de ovo à emergência de adultos (machos e fêmeas), de acordo com Lei de Reamur e com o método da intersecção de X, respectivamente. A duração dos estágios de ovo, ninfa e de ovo a adulto de C. gossypii com folhas de mamona entre as temperaturas de 20°C e 28ºC variaram de 17,2 a 7,6 dias; 28,5 a 10,3 dias e 45,7 a 17,9 dias, respectivamente. A duração dos estádios ninfais de C. gossypii com folhas de mamona variou dentro de cada instar, entre instares e entre os sexos de acordo com a temperatura. O desenvolvimento das fases de ovo, ninfa e de ovo a adulto de C. gossypii, requer 86,8; 123,5 e 208,3 graus-dia, respectivamente, acima dos limites térmicos o o o inferiores de 15,1 C; 15,4 C e 15,4 C. Os valores de fecundidade foram inversamente proporcionais ao aumento da temperatura. A maior longevidade de adultos de C. gossypii com folhas de mamona foi observada a 25 ºC e a menor a 20 ºC.