Xu Jiawu. / "March 2005." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (p. 103-120) / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

Ho Hoi Yan. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references (leaves 107-118). / Abstracts in English and Chinese. / Abstract --- p.i / Abstract (Chinese) --- p.iii / Acknowledgments --- p.v / Contents --- p.vii / List of Tables --- p.x / List of Figures --- p.xi / Chapter Chapter 1 --- General Introduction --- p.1 / Chapter Chapter 2 --- Literature Review --- p.5 / Chapter 2.1 --- Introduction to phylogenetic biology --- p.5 / Chapter 2.1.1 --- Definition of phylogenetics --- p.5 / Chapter 2.1.2 --- Why employ molecular genetic markers in phylogenetics? --- p.5 / Chapter 2.2 --- DNA analysis and the contributions to phylogenetics --- p.7 / Chapter 2.2.1 --- Nuclear ribosomal DNA --- p.7 / Chapter 2.2.2 --- Animal mitochondrial DNA (mt DNA) --- p.10 / Chapter 2.3 --- Molecular phylogeny of crustaceans --- p.11 / Chapter 2.3.1 --- Phylogenetic studies of crustaceans using nuclear rRNA --- p.11 / Chapter 2.3.2 --- Population genetic and phylogenetic studies of crustaceans using mtDNA --- p.14 / Chapter 2.4 --- Taxonomy of the genus Eriocheir --- p.23 / Chapter 2.5 --- Distribution of Eriocheir s.l --- p.27 / Chapter 2.6 --- Population genetics of Eriocheir --- p.28 / Chapter 2.6.1 --- Population genetics of Eriocheir japonica --- p.28 / Chapter 2.6.2 --- Population genetics and history of invasion of Eriocheir sinensis --- p.29 / Chapter Chapter 3 --- Materials and Methods --- p.32 / Chapter 3.1 --- Specimens --- p.32 / Chapter 3.1.1 --- Specimens for phylogenetic reconstruction --- p.32 / Chapter 3.1.2 --- Specimens for population genetic study on E. sinensis --- p.33 / Chapter 3.2 --- DNA extraction --- p.33 / Chapter Chapter 3 --- Materials and Methods --- p.32 / Chapter 3.1 --- Specimens --- p.32 / Chapter 3.1.1 --- Specimens for phylogenetic reconstruction --- p.32 / Chapter 3.1.2 --- Specimens for population genetic study on E. sinensis --- p.33 / Chapter 3.2 --- DNA extraction --- p.33 / Chapter 3.3 --- Amplification of genes --- p.36 / Chapter 3.3.1 --- PCR profile --- p.38 / Chapter 3.3.1.1 --- 16S rRNA gene --- p.38 / Chapter 3.3.1.2 --- COI gene --- p.40 / Chapter 3.3.1.3 --- ITS-1 gene --- p.41 / Chapter 3.4 --- DNA sequencing --- p.41 / Chapter 3.4.1 --- Purification of extension products --- p.43 / Chapter 3.4.2 --- Electrophoresis and data collection --- p.44 / Chapter 3.4.3 --- Sequence alignment --- p.44 / Chapter 3.5 --- Phylogenetic construction --- p.45 / Chapter Chapter 4 --- Results --- p.47 / Chapter 4.1 --- Phylogenetic reconstruction of Eriocheir --- p.47 / Chapter 4.1.1 --- PCR products of mitochondrial 16S rRNA and COI gene and nuclear ribosomal ITS-1 gene --- p.47 / Chapter 4.1.2 --- Intraspecific variation --- p.49 / Chapter 4.1.3 --- Genetic variability in mitten crabs based on partial sequences of 16S rRNA gene --- p.49 / Chapter 4.1.4 --- Genetic variability in mitten crabs based on partial sequences of COI gene --- p.53 / Chapter 4.1.5 --- Genetic variability in mitten crabs based on complete sequences of ITS-1 gene --- p.62 / Chapter 4.1.6 --- Phylogenetic analysis --- p.66 / Chapter 4.1.6.1 --- Phylogenetic analysis based on 16S rDNA sequences --- p.66 / Chapter 4.1.6.2 --- Phylogenetic analysis based on COI gene sequences --- p.70 / Chapter 4.1.6.3 --- Phylogenetic analysis based on ITS-1 gene sequences --- p.73 / Chapter 4.2 --- Population genetic study of E. sinensis --- p.77 / Chapter 4.2.1 --- PCR products and intraspecific variation of mitochondrial COI gene for population genetic study of E. sinensis --- p.77 / Chapter 4.2.2 --- Genetic variability in E. sinensis based on partial sequences of COI gene --- p.79 / Chapter 4.2.3 --- Population genetic analysis based on COI gene sequences --- p.86 / Chapter Chapter 5 --- Discussion --- p.93 / Chapter 5.1 --- Phylogeny of Eriocheir --- p.93 / Chapter 5.1.1 --- Phylogenetic relationships --- p.93 / Chapter 5.1.2 --- Taxonomic implications --- p.95 / Chapter 5.1.3 --- Evolutionary history of Eriocheir --- p.97 / Chapter 5.2 --- Population study of E. sinensis --- p.101 / Chapter 5.2.1 --- Genetic variation between Chinese populations --- p.101 / Chapter 5.2.2 --- Genetic variation between native and introduced populations --- p.102 / Chapter Chapter 6 --- Conclusions --- p.104 / Literature Cited --- p.107

Studien utgår från en tidigare genomförd systematisk litteraturstudie där centrala aspekter för elevers möjlighet att utveckla kommunikationsförmågan i matematik genom ett kooperativt lärande lyfts fram. Denna studie syftar till att undersöka på vilka sätt två olika kooperativa strukturer ger möjligheter gällande elevers utveckling av kommunikationsförmågan i matematik. Den insamlade empirin och studiens resultat grundar sig på tio observationstillfällen på två olika skolor i årskurs F-3. Studiens resultat visar på fördelar och utmaningar med de kooperativa strukturerna mötas på mitten och kloka pennan. Resultatet visar att mötas på mitten är mest gynnsam av de två undersökta strukturer vad det gäller utveckling av elevers kommunikationsförmåga i matematik när de arbetar med en problemlösningsuppgift.

This study is a multidisciplinary approach to Species Distribution Modelling (SDM) where predictive models have been developed regarding the current distribution and potential spread of two invasive species found in Baltic Sea waters. Invasive species in the Baltic have long been an ecological and economic problem and the two species studied are well known for their adaptability in colonization and detrimental effects on local ecology all over the world. First, the Round Goby (Neogobius Melanostomus) has been steadily colonizing the Swedish Baltic coastline since 2008, the impact of which on local ecosystems is not fully understood. Also, the Chinese Mitten Crab (Eriocheir Sinensis), found in Swedish waters since the 1930’s, has been known to be a robust invader of ecosystems but presence in the Baltic is still not well explained. Four high spatial resolution models have been developed, three respective Round Goby and one for Mitten Crab. Two models are specific to the Blekinge/Hanöbukten region of the Swedish Baltic Sea coast, showing predicted current distribution of Round Goby. Two are predictions of Round Goby and Mitten Crab transferred or projected to other regions, with different approaches in setting model parameters and choosing variables, showing current and potential distribution. This study features: exploratory data analysis and filtering using GIS tools, highly discriminant environmental variable selection and rejection, and several different approaches to modelling in Maxent using custom and default settings. Predictive maps have been developed showing current distribution and potential spread as well as explanatory tabular data outlining direct and indirect drivers of species presence. Maxent has proven to be a powerful predictive tool on a regional basis, and proximity to introduction locations play a major role. Maxent, used in combination with spatial data modelling, exploration and filtering techniques has yielded a valid explanatory model as well. Transferring predictions to other regions is quite sensitive, however, and can depend heavily on species, sampling strategy and similarity of habitat type. Round Goby predictions were successfully created regionally and transferred to Stockholm, but Mitten Crab predictions were not successfully transferred to Blekinge.

Marine and freshwater aquatic invasive species are a huge problem in the United States and its territorial waters with myriad ecological and economic impacts. Current management methods have fallen short. One possible solution is to harvest them for human consumption. This should be done through small scale, carefully regulated, scientifically based programs that are part of a larger overall management strategy. Four case studies (northern snakehead, European green crab, Asian carp, Chinese mitten crab) assessing edibility are included.

The Microsporidia are obligate intracellular parasites that have jettisoned oxidation phosphorylative capabilities during their early evolutionary history and so rely on ATP import from their host and glycolysis for their energy needs. Some species form tight associations with the host’s mitochondria and this is thought to facilitate ATP sequestration by the developing intracellular microsporidian. The human parasite, Enterocytozoon bieneusi has however lost glycolytic capabilities and may rely entirely on ATP import from its host for energy. E. bieneusi belongs to the Enterocytozoonidae microsporidian family and recent rDNA-based phylogenetic studies have suggested it has close evolutionary ties with Enterospora canceri, a crab-infecting intranuclear parasite. Such a close evolutionary relationship implied that glycolysis might also be absent in the intranuclear parasite raising questions as to how this parasite obtains energy from its unusual niche that is physically walled off from the host mitochondria, the main source of ATP in the host cell. In this study, draft genomes of four species of the Enterocytozoonidae namely, Ent. canceri, E. hepatopenaei, Hepatospora eriocheir and Hepatospora eriocheir canceri and one non-Enterocytozoonidae species, Thelohania sp. were assembled and annotated (The genome assembly of Hepatospora eriocheir was provided by Dr. Bryony Williams). Phylogenomics performed with this and publicly available genomic data confirmed the close evolutionary ties between Ent. canceri and E. bieneusi. Comparative genomic analyses also revealed that glycolysis is indeed lost in all members of the Enterocytozoonidae family sequenced in this study, hinting to the relaxation of evolutionary pressures to maintain this pathway at the base of this microsporidian family. Despite this absence, the hexokinase gene was retained in all aglycolytic genomes analysed, and that of Ent. canceri was fused to a PTPA gene. Functional assays and yeast complementation assays suggest that this chimera is able to recognise glucose as a substrate but the heterologously expressed homolog of H. eriocheir cannot. Finally, phylogenomics have been used here to demonstrate that despite the morphological differences between three Hepatospora-like organisms parasitizing different crab hosts, they are the same species. This finding adds more weight to current evidence suggesting that morphology is not an ideal marker for taxonomical classification in the Microsporidia.

In this project, the fabrication of single-photon detectors based on superconducting nanowires is presented, with great focus on extending their operation range to the mid infrared. In particular, Niobium Titanium Nitride (NbTiN) and Molybdenum Silicide (MoSi), superconducting materials with different properties, are presented, studied and used as fabrication platforms. Different approaches are followed, mainly adjusting the nanowire width and thickness to achieve near unity quantum efficiency at mid infrared wavelengths. With the vision of using these devices for atmospheric LIDAR and sensing experiments, saturation at 2050 nm is studied that corresponds to the absorption peak of CO2. For the best device made on NbTiN thin films, unity quantum efficiency is shown at 2050 nm with a time jitter of 116 ps at 1550 nm. Simulations using the transfer matrix method and the commercial software Lumerical are carried out, concluding that the devices made in NbTiN could have 23.1-26.7% system detection efficiency at 2050 nm on a Silicon SiO2/Si platform. Further improvements show that the detection efficiency could reach between 52-62% (for 0.33 and 0.5 fill factor, respectively calculated with FDTD simulations) by engineering optical cavities. / I detta projekt presenteras en fabrikations process för enstaka foton detektorer baserade på supraledande nanotrådar. Fokuset har legat på att utöka våglängds regionen där detektorernas kan detektera till mid-infrarött ljus. Två specifika supraledande material, Niobium Titan (NbTiN) och Molybdenum Silicide (MoSi), med olika egenskaper har studerats och använts som material. Dimensionerna på nanotrådarna, framför allt tjockleken och bredden, har optimerats för att uppnå nära enhetlig kvant-effektivitet vid mid-infraröda våglängder. Med visionen att detektorerna ska användas för atmosfäriska LiDAR mätningar har de studerats för satruering vid 2050 nm som motsvarar ett absorbtions maximum för CO2. Detektorerna tillverkade med NbTinN uppnådde 100% kvant effektivitet för 2050 nm ljus med ett tids jitter på 116 ps vid 1550 nm ljus. Simuleringar med överförings matrisen metoden och den kommersiella mjukvaran Lumerical visar att NbTiN detektorer placerade på en SiO2/Si platform kan ha en 23.1-26.7% effektivitet vid 2050 nm. Ytterligare simuleringas visar att effektiviteten kan nå upp till 52-62% (för 0.33 och 0.5 fyllnadsfaktor, respektive beräknad med FDTD) genom att inkludera optiska kaviteter.

Den breda mitten, eller bara mitten, är ett centralt begrepp i Centerpartiets identitet. Trots detta är Centerpartiets sakpolitik inte särskilt positionerad i ”mitten”. Partiet är snarare det mest högerlutande partiet av samtliga riksdagspartier vad gäller ekonomiska frågor. Samtidigt är själva idén med den breda mitten att etablera ett bredare samarbete över blockgränser men exkludera Vänsterpartiet och Sverigedemokraterna på grund av deras respektive ytterkantsposition. Rent sakpolitiskt är den breda mitten en gåta. Medan fenomenet inte tillåter sig att begripas speciellt väl ur ett sakpolitiskt perspektiv, argumenterar föreliggande uppsats för att det bättre kan förstås utifrån dess symboliska betydelse. Den breda mitten undersöks således som en instans av sekulär religion. Genom intervjuer med Centerpartister kartläggs ett religiöst meningssystem som grundas på; (1) ett heligt ideal om en icke-extrem politisk karaktär i form av mitten; (2) en moralisk gemenskap som sluter upp kring idealet och försvarar det från all form av upplevd extremism, men som är mer intresserad av sitt förakt för Sverigedemokraterna och (3) upplevelser av hur ritualer kring motståndet mot Sverigedemokraterna och självuppoffring för idealet erbjuder frälsning från synden att kunna associeras med Sverigedemokraterna via högeridentiteten. Religionens funktion tolkas vara att reglera diskrepansen mellan partiets identitet och praktik genom ritualer och moraliska argument som triumferar över sakliga problem med motstånd mot Sverigedemokraterna som den övertygande mekanismen. Mitten identifieras vidare som den perfekta täckmanteln för en förlorad högeridentitet och för de framgångar som motståndet mot Sverigedemokraterna bringar partiet, då motstånd mot båda ytterkantspartierna gör att Centerpartiet kan hävda sig som mitten och därigenom attrahera den större grupp väljare som finns där. Motståndet mot Sverigedemokraterna tolkas i sin tur som den grundläggande drivkraften bakom fenomenet den breda mitten, en drivkraft som inte bara bygger på framgångar i termer av en ökad väljarbas utan också på en upplevd välvilja, en dold förhoppning om en alternativ och självständig högergemenskap men även på en möjlighet för Centerpartiet att göra upp med sin egen historia av främlingsfientlighet. / The broad middle, or just the middle, is a central concept in the identity of The Centre Party in Sweden. Despite this, the politics of The Centre Party is not particularly positioned in “the middle”. Rather, The Centre Party is the most right-leaning party of all the parliamentary parties when it comes to economic issues. Simultaneously, the very idea behind the broad middle is to establish wider cooperation across block boundaries but exclude the parliamentary parties The Left Party and The Sweden Democrats due to their respective outer edge position. As a matter of concrete policy, the broad middle is an enigma. While the phenomenon does not allow itself to be understood particularly well from a concrete political perspective, the present thesis argues that it can be better understood based on its symbolic meaning. The broad middle is thus analysed as an instance of secular religion. Through interviews with members of The Centre Party, a religious meaning system is mapped which is based on; (1) a sacred ideal of a non-extreme political character in the form of the middle; (2) a moral community that defends the ideal by protecting it from all sorts of experienced extremism, but whose interest lies more in its contempt for The Sweden Democrats and (3) experiences of how rituals surrounding the antagonism towards The Sweden Democrats and self-sacrifice for the ideal offers salvation from the sin of being associated with The Sweden Democrats trough a Right-wing identity. The function of the religion is interpreted as regulating the discrepancy between The Centre Party’s identity and practise through rituals and moral arguments that triumphs over factual problems with the antagonism towards The Sweden Democrats as the convincing mechanism. The middle is further identified as the perfect cover for a lost Right-wing identity and for the successes that the antagonism towards The Sweden Democrats brings the party, since opposition to both the outer-edge parties allows The Centre Party to assert itself as the middle and thus attract the larger group of voters who are located there. The antagonism towards The Sweden Democrats is in turn identified as the primal driving force behind the phenomenon the broad middle, a driving force that is not only based on successes in term of increased voters but also on an experienced benevolence, a hidden hope for an alternative and independent Right-wing community as well as on an opportunity for redemption with The Centre Party’s own history of xenophobia.

The Internet of Things is a growing area with growing security concerns, new threat emerge almost everyday. Keeping up to date, monitor the network and devices and responding to compromised devices and networks are a hard and complex matters.  This bachelor’s thesis aims to discover how a IT-company can work with security management within the Internet of Things, this is done by looking into how a IT-company can work with updating, monitoring and responding within the Internet of Things, as well what challenges there are with working with this.  A qualitative research approach was used for this case study along with an interpretative perspective, as well as abductive reasoning. Interviews were performed with employees of a large IT-company based in Sweden, along with extensive document analysis.  Our bachelor’s thesis results in challenges with Security Management within the areas updating, monitoring and responding along with how our Case Company works with these security challenges. Largely these challenges can be summarized that everything is harder with the number of devices there are within the Internet of Things / Internet of Things eller Sakernas internet är ett växande område med en växande hotbild och nya hot uppkommer dagligen. Att hålla sig uppdaterad, övervaka nätverk och enheter samt att reagera på att enheter och nätverk blir hackade är en svår och komplicerad uppgift. Den här uppsatsen ämnar undersöka hur ett IT-företag kan arbeta med säkerhetshantering inom Internet of Things. Detta har gjorts genom att kolla utmaningar och säkerhetslösningar inom de tre områdena uppdatera, övervaka och reagera.  En kvalitativ forskningsmetod har använts i denna fallstudie tillsammans med ett tolkande synsätt och en abduktiv ansats. Vi har utfört intervjuer på ett stort IT-företag baserat i Sverige tillsammans med en utförlig dokumentanalys.  Resultatet av denna uppsats påvisar ett antal utmaningar inom säkerhetshanteringen inom områdena uppdatera, övervaka och reagera tillsammans med hur vårt fallföretag jobbar med att motarbeta dessa utmaningar. I stort sett kan utmaningarna sammanfattas till att allting är svårare när mängden enheten är så hög som den är inom Internet of Things.

Within this text, I will discuss my process of making sculptures through my examining MA soloshow. It is a deeply personal reflection of my ideas and where they originate from, symbolsand what they speak of, materials and techniques they require. The theme of my sculptures ischildhood and memories, what I lost when growing up, and who I became. There is also astrong theme of craftsmanship in my work and, in this text, an exploration of materials andthe knowledge of my working hands. In this essay, I present four sculptures within thechapters THE BRAID, THE ROPE, THE MITTEN, and THE WELL. It aims to give the reader aninsight into my artistic process when creating my MA exam work.