京都大学 / 0048 / 新制・課程博士 / 博士(農学) / 甲第19781号 / 農博第2177号 / 新制||農||1041(附属図書館) / 学位論文||H28||N4997(農学部図書室) / 32817 / 京都大学大学院農学研究科農学専攻 / (主査)教授 白岩 立彦, 教授 奥本 裕, 教授 稲村 達也 / 学位規則第4条第1項該当 / Doctor of Agricultural Science / Kyoto University / DFAM

This thesis examines the validity of the cost of carry model for pricing FTSE100 futures contracts and the relationship between FTSE100 spot and futures markets during two sub-periods characterised by different market trading systems employed by the LSE and LIFFE. The empirical work is carried out using three approaches to econometric modeling: a basic VECM for spot and futures prices, a VECM extended with a DCCTGARCH framework to account for the conditional variance-covariance structure for spot and futures prices and a threshold VECM to capture regime-dependent spot-futures price dynamics. Overall, both the basic VECM and the DCC-TGARCH analysis suggest that there are deviations from the cost of carry relationship in the first sub-sample when transactions costs in both markets are relatively high but that the cost of carry relationship tends to be valid in the second sub-sample when transactions costs are lower. This is further confirmed by the evidence of higher conditional correlations between the two markets in the second sub-sample as compared with the first, using the DCC-TGARCH analysis. This implies that the no-arbitrage cost of carry relationship between spot and futures markets is more effectively maintained by index arbitrageurs in the second period when market conditions are closer to perfect market assumptions, and hence the cost of carry model could be more reasonably used as a benchmark for pricing stock index futures. The threshold VECM analysis depicts regime-dependent price dynamics between FTSE100 spot and futures markets and leads to some interesting and important findings: arbitrage may not be practicable under some market conditions, either because it is difficult to find counterparties for the arbitrage transactions, or because there is significant risk associated with arbitrage; as a result, the cost of carry model may not always be suitable for pricing stock index futures. Furthermore, the threshold values yielded from estimating the threshold VECM reflect the average transaction costs for most arbitrageurs that are more reliable and fair than subjective estimations.

Neuroscientists are increasingly overwhelmed by new recordings of the nervous system. These recordings are significantly increasing in size due to new electrophysiological techniques, such as multi-electrode arrays. These techniques can simultaneously record the electrical activity (or spike trains) from thousands of neurons. These new datasets are larger than the traditional datasets recorded from single electrodes where fewer than ten spike trains are usually recorded. Consequently, new tools are now required to effectively analyse these new datasets. This thesis describes how techniques from the field of Visual Analytics can be applied to detect specific patterns in spike train data. These techniques are realised in a software tool called Neurigma. Neurigma is a collection of visual representations of spike train data that are unified to provide a coordinated representation of the data. The visual representations within Neurigma include: an interactive raster plot, an improved correlation grid, a novel representation called the correlation plot (which includes a novel coupling estimation algorithm), and a novel network diagram. These views provide insight into spike train data, and particularly, they identify correlated patterns, called functional connectivity. Within this thesis Neurigma is used to analyse synthetically generated datasets and experimental recordings. Three main findings are presented. First, propagating spiral patterns are identified within recordings from the neonatal mouse retina. Second, functional connectivity is identified within the cat visual cortex. Finally, the functional connectivity of a large synthetic dataset, of 1000 spike trains, is accurately classified into direct, indirect and common input coupling.

Hyggesfritt skogsbruk är en övergripande term som innebär att skogen sköts så att marken alltid är trädbevuxen utan att det uppstår några större kalhuggna ytor. Syftet med studien var att få en ökad förståelse för hur hyggesfritt skogsbruk fungerar i praktiken för privata enskilda skogsägare i Sverige. Frågeställningarna berörde vilka metoder som tillämpas, vilka mål som skogsägarna har och vilka utmaningar de ställs inför genom att bruka skogen hyggesfritt. Studien genomfördes med hjälp av en webbenkät. Resultaten visade att den vanligaste hyggesfria metoden för de privata skogsägarna var plockhuggning. De vanligaste målen med det hyggesfria brukandet var bevarad skogskänsla, ökad variation i skogen och ökad biologisk mångfald. Skogsägarnas utmaningar med det hyggesfria brukandet var främst relaterade till maskinparken, brist på kunskap och tillgång till rådgivning. Det finns ett behov av mer forskning om hyggesfritt skogsbruk.

Studies of biodegradation in lignins by basidiomycetes yeasts show the conversion of lignin in various degradation products among which vanillin, a valuable substance, suggested to be a strong inhibitor of both fermentation and growth of yeasts, stands. Sporidiobolales yeasts used in these experiments were aimed to be identified by their highly conserved ITS region as well as studied in vanillinsupplemented medium through, vanillin-supplemented plates, TLC and Neubauer’s chamber to find out which, among the several isolates tested, were the most resistant ones, understand how they take up vanillin and how their growth is affected by the presence of the phenolic compound. Two strains were identified as Rhodotorula babjevae. One of them, L4, together with LS22, Rhodosporidium kratochvilovae, could withstand and biodegrade high concentrations of vanillin, producing biodegradation products with Rf values similar to the ones know for vanillic acid and vanillyl alcohol. Better growth in medium supplemented with small doses of vanillin was found, as well as disparity among the same species and their metabolic features, therefore, herbicides resistance was suggested as a reason for strains divergence. Further morphological-species comparison could also describe if there exist a relation between them. / Estudios sobre la biodegradación de ligninas por levaduras basidiomicetes muestran la conversión de lignina en distintos productos de degradación, entre los cuales se encuentra la vainillina, un fuerte inhibidor de la fermentación y el crecimiento de levaduras. Las levaduras Sporidiobolales utilizadas en estos experimentos han intentado ser identificadas a través de la región ETI, muy conservada, además de estudiadas en medios suplementados con vainillina mediante placas suplementadas con vainillina, CCF y cámara de Neubauer para averiguar cuáles son las cepas más resistentes, entender cómo metabolizan la vainillina y cómo su crecimiento se ve afectado por la presencia de dicho compuesto. Dos cepas fueron identificadas como Rhodotorula babjevae. Una de ellas, L4, junto con con la cepa LS22, Rhodosporidium kratochvilovae, pudieron soportar y biodegradar elevadas concentraciones de vainillina, originando productos de biodegradación con valores de Rf similares a los del ácido vanílico y alcohol vanílico previamente conocidos. Se encontró un crecimiento mejor en medios suplementados con pequeñas dosis de vainillina además de una disparidad entre mismas especies y sus características metabólicas, así, herbicidas han sido sugeridos como una posible causa en dicha divergencia. Una futura comparación morfología-especie podrá describir si existe relación entre ambos.

Sveriges ökade engagemang i internationella konflikter har förändrat under vilkaformer och i vilka miljöer som dagens militära operationer genomförs. Framföralltinnebär det att alla insatsförband inom Försvarsmakten ska kunna verka inom allakonfliktnivåer och i de flesta miljöer, även i urban terräng. Som en följd av dettauppkommer nya behov och krav på den indirekta bekämpningsförmågan i form avprecisionsbekämpning. Syftet med föreliggande arbete är att kartlägga om, och till vilken grad, ettkurskorrigerande tändrör bidrar till att öka den taktiska effektiviteten förstådd somverkanseffektivitet, kostnadseffektivitet, logistisk effektivitet samt minskad oönskadsidoverkan. Kartläggningen sker genom en komparativ litteraturstudie medkompletterande expertintervjuer. Med hjälp av kurskorrigerande tändrör som medger nära precisionsbekämpning kanen rad vinster erhållas. Exempel på sådana vinster är minskad spridning samt ökaddimensionering av verkan, minskad risk för oönskad sidoverkan, en lägre totalkostnad för ammunition samt minskat behov av transporter genom ökad effekt av detenskilda skottet. / Sweden’s increased international commitment has altered the forms andenvironments of today's battlefield and military operations for units within theSwedish Armed Forces. First and foremost it means that all units have to be able tohandle all levels of conflict in most types of environments, including urban terrain.As a consequence of this, new needs and requirements arise concerning indirect fireand Artillery precision strike capabilities. The purpose of this thesis is to investigate if and to what extent a course correctingfuse contributes to an increased tactical efficiency within the areas of effect, cost,logistics and reduced risk of collateral damage. The investigation is made through acomparative literature study with supplementary expert interviews.With the help of a course correcting fuse, which allows for close precision capability,a series of achievements can be acquired. Examples of such achievements are reduced dispersion and increased capability ofdimensioning of effects, reduced risk of collateral damage, lower total cost ofmunitions and reduced demand of logistics.

My thesis is a novel-length work of historical fiction entitled Thickwood. The novel can be situated within the context of great/interior plains literature, given its substantial focus on the Thickwood Hills, the northern remnant of the Missouri Coteau. This transition zone between the plains and the mixed boreal forest is an area of geographical and cultural tension. Within this drainage system of the Saskatchewan Rivers, Europeans traded for food and furs with First Nations and Métis peoples, leading to the signing of Treaty 6 and the formation of First Nations Reserves. In Thickwood characters travel across the rugged landscape but also travel into their interior landscape to struggle with questions about belonging and place. During formative years of development, certain landscapes become places of significant attachment, laden with emotional connection and sentiment. This historical work, set in Saskatchewan in 1950, takes place during intense changes after World War Two. Many rural communities without power, good roads, and even telephone services struggled to keep up with post-war development. The cooperative movement, encouraged by Premier Tommy Douglas, was a means for rural people to pool resources to improve their communities. Beef prices were climbing to an all-time high, increasing demand for pastureland. Using close third-person point of view, the novel follows a young female character skilled in ranching, horses, and the sport of baseball. Willomena Swift struggles to find a future for herself after returning from two seasons pitching in the All-American Girls Professional Baseball League. The lease to her family ranch is about to end and her father sells the remaining land to the growing community pasture. After a rogue stallion kills Willo’s purebred foal, she begins a quest to control the stallion and avoid its villainous owner, who is also the pasture committee chairman. Willo uses wit and skill to survive the perils of the landscape and gains confidence to confront Nesteroff about taking over her home as the new pasture headquarters after her father’s death. The novel Thickwood explores personal connections to rugged homeland, spirited horses, and love.

The professionalization of political parties has significantly altered the means by which parties interact with voters and supporters. The current study is an attempt to examine what these changes in political communication mean for the ability of parties to organize supporters and mobilize them both in a campaign setting and in the longer-term struggle. Habermasian and Gramscian perspectives on the relational aspects of political communication highlight the challenges presented by the growing unidirectionality of communication and the concomitant atrophying of intermediary institutions. Beyond this, the work of Bottici and McLuhan is used to expose the effects of the 'arational' aspects of these changes in both form and content. To test the plausibility of the theoretical insights obtained, the case of the New Democratic Party of Canada is considered. The study concludes by considering the potential of new technological developments for resolving or mitigating concerns identified throughout the thesis. / Graduate

This thesis provides a detailed account of the introduction, use, and repeal of the alternative vote (AV) in British Columbia in the 1950s. It argues that British Columbians, familiar with polarized, two-party politics, were dismissive of majority representation. Conversely, the public expressed a strong preference for local representation during discussions of redistribution. While the Liberal and Conservative Coalition parties introduced AV to keep the Co-operative Commonwealth Federation from forming a government, party members were often stronger proponents of electoral reform than their leaders. Nevertheless, the system was debated in terms of democratic values. This was true of electoral reform debates across Canada, including federal debates on proportional representation. Contrary to histories that focus solely on the 1952 and 1953 AV elections and W.A.C. Bennett and Social Credit, this project traces the origins of the alternative vote in BC from the 1940s forward, including ongoing discussions of the single transferable vote (STV) and a points system. The history of BC’s provincial party system in the twentieth century is included in order to establish how polarized politics affected British Columbians’ attachment to the idea of local representation. This thesis contends that the public’s preference for plurality voting contributed to its dismissal of AV: even those who ranked multiple candidates did not necessarily endorse the system. This project also looks at the alternative vote debates in the 1970s and redistribution commissions in BC, particularly the 1978 Eckardt Commission, in order to better understand British Columbians’ attachment to local representation and first-past-the-post, and their dismissal of a preferential system that encouraged them to rank candidates. Social Credit favoured regional representation over representation by population during the redistribution process, and the theme of local representation has consistently framed discussions of electoral reform in British Columbia, including the 2004 BC Citizens’ Assembly’s STV proposal.

Aerosols affect the global radiation budget which plays an important role in determining the state of the Earth's climate. The heterogeneous distribution of aerosols and the variety in their properties results in high uncertainty in the understanding of aerosols. Aerosols affect the radiation by scattering and absorption (direct effect) or by modifying the cloud properties which in turn affects the radiation (indirect effect). The current work focuses only on the direct radiative effect of aerosols. The change in the top-of-atmosphere (TOA) reflected flux due to the perturbation of aerosols and their properties is called direct aerosol radiative forcing (ARFTOA). Estimation of ARFTOA using aerosol properties is done by solving the radiative transfer equation using a radiative transfer model. However, before using the radiative transfer model, it has to be validated with observations for consistency. This is done to check if the model is able to replicate values close to actual observations. The current work uses the Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART) model. The output radiative fluxes from SBDART are validated by comparing with the Clouds and the Earth's Radiant Energy System (CERES) satellite data. Under clear-skies SBDART agreed with observed fluxes at TOA well within the error limits of satellite observations. In the shortwave solar spectrum (0.25-4 µm) radiation is affected by change in various aerosol properties and also by water vapour and other gas molecules. To study the effect of each of these molecules separately on the aerosol forcing at TOA, SBDART is used. ARFTOA is found to depend on the aerosol loading (aerosol optical depth – AOD), aerosol type (SSA) and the angular distribution of scattered radiation (asymmetry parameter). The role of water vapour relative to the aerosol layer height was also investigated and for different aerosol types and aerosol layer heights, it was found that water vapour can induce a change of ~4 Wm-2 in TOA flux. The relative importance of aerosol scattering versus absorption is evaluated through a parameter called single scattering albedo (SSA) which can be estimated from satellites. SSA defined as the ratio of scattering efficiency to total extinction efficiency, depends on the aerosol composition and wavelength. Aerosols with SSA close to 1 (sea-salt, sulphates) scatter the radiation and cool the atmosphere. Aerosols with SSA < 0.9 (black carbon, dust) absorb radiation and warm the atmosphere. Over high reflective surfaces a small change in SSA can change forcing from negative (cooling) to positive (warming). This makes SSA one of the most important and uncertain aerosol parameters. Currently, the SSA retrievals from the Ozone Monitoring Instrument (OMI) are highly sensitive to sub-pixel cloud contamination and change in aerosol height. Using the sensitivity of OMI to aerosol absorption and the superior cloud masking technique and accurate AOD retrieval of Moderate Resolution Imaging Spectroradiometer (MODIS), an algorithm to retrieve SSA (OMI-MODIS) was developed. The algorithm was performed over global oceans (60S-60N) from 2008-2012. The difference in SSA estimated by OMI-MODIS and that of OMI depended on the aerosol type and aerosol layer height. Aerosol layer height plays an important role in the UV spectrum due to the dominance of Rayleigh scattering. This was verified using SBDART which otherwise would not have been possible using just satellite observations. Both the algorithms were validated with cruise measurements over Arabian Sea and Bay of Bengal. It was seen that when absorbing aerosols (low SSA values) were present closer to the surface, OMI overestimated the value of SSA. On the other hand OMI-MODIS algorithm, which made no assumption on the aerosol type or height, was better constrained than OMI and hence was closer to the cruise measurement The presence of clouds results in a more complex interaction between aerosols and radiation. Aerosols present above clouds are responsible to most of the direct radiative effect in cloudy regions. The ARFTOA depends not only on the aerosol properties but also on the relative position of aerosols with clouds. When absorbing aerosols are present above clouds, the ARFTOA is highly influenced by the albedo of the underlying surface. Recent studies, over regions influenced by biomass burning aerosol, have shown that it is possible to define a ‘critical cloud fraction’ (CCF) at which the aerosol direct radiative forcing switch from a cooling to a warming effect. Similar analysis was done over BoB (6.5-21.5N; 82.5-97.5E) for the years 2008-2011. Aerosol properties were taken from satellite observations. Satellites cannot provide for aerosols present at different heights and hence SBDART was used to calculate the forcing due to aerosols present only above clouds. Unlike previous studies which reported a single value of CCF, over BoB it was found that CCF varied from 0.28 to 0.13 from post-monsoon to winter as a result of shift from less absorbing to moderately absorbing aerosol. This implies that in winter, the absorbing aerosols present above clouds cause warming of the atmosphere even at low cloud fractions leading to lower CCF. The use of multiple satellites in improving the retrieval of SSA has been presented in this thesis. The effect of aerosols present above clouds on the radiative forcing at TOA is shown to be different between Bay of Bengal and Atlantic Ocean. This was due to the change in SSA of aerosols during different seasons. The effect of aerosol height, aerosol type and water vapour on the TOA flux estimation is also studied using a radiative transfer model.