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We report the discovery and orbit of a new dwarf planet candidate, 2015 RR245, by the Outer Solar System Origins Survey (OSSOS). The orbit of 2015 RR245 is eccentric (e = 0.586), with a semimajor axis near 82 au, yielding a perihelion distance of 34 au. 2015 RR245 has g - r = 0.59 +/- 0.11 and absolute magnitude H-r = 3.6 +/- 0.1; for an assumed albedo of p(V) = 12%, the object has a diameter of similar to 670. km. Based on astrometric measurements from OSSOS and Pan-STARRS1, we find that 2015 RR245 is securely trapped on ten-megayear timescales in the 9: 2 mean-motion resonance with Neptune. It is the first trans-Neptunian object (TNO) identified in this resonance. On hundred-megayear. timescales, particles in 2015 RR245-like orbits depart and sometimes return to the resonance, indicating that 2015 RR245 likely forms part of the long-lived metastable population of distant TNOs that drift between resonance sticking and actively scattering via gravitational encounters with Neptune. The discovery of a 9: 2 TNO stresses the role of resonances in the long-term evolution of objects in the scattering disk. and reinforces the view that distant resonances are heavily populated in the current solar system. This object further motivates detailed modeling of the transient sticking population.

What are the ordinary objects we sense? More precisely, how do we characterize the nature of their existence? In this exploration, we consider possible theories about the structure of concrete particulars, engaging with topics including attributes, universals, intrinsic unity, Identity of Indiscernibles, change, and more. Once we understand each theory, we evaluate it. In the end, can we find a suitable theory that coheres with our intuitive understanding of the ‘things’ we take for granted?

Leonardi & Barley menar att organisationsstudier bör fokuseras mot hur personer arbetar med datorer och datasystem, samtidigt som Orlikowski menar att studier av arbete med datasystem bör baseras på praktikteorier. Studien kombinerar därför två teorier för att studera modernt arbete som till stor del baseras på datorsystem eller användandet av datorer, CHAT och boundary objects. Studiens syfte är att analysera om praktikteorin, CHAT kan användas för att studera ett modernt arbete som är teknikbaserat, gränsöverskridande och kunskapsintensivt, nämligen internprissättning. Slutsatserna är att CHAT går att använda för modernt arbete trots att teorins materiella bakgrund inte tagit informationsteknik i beaktande. Samtidigt belyste användningen av teorin att de geografiska gränserna mellan aktivitetssystem blir mindre, subjekten kan befinna sig på olika breddgrader utan problem, samtidigt som de olika elementen får fler funktionsområden.

Thesis advisor: Sean MacEvoy / Humans can pay attention both to particular locations in space (“space-based attention”) and to specific objects (“object-based attention”). The goal of this study was to understand the role of object familiarity and complexity in the control of object-based attention. We used a well-known manifestation of object-based attention known as same-object advantage (SOA) to test this. In SOA, participants are faster at detecting a target event that takes place in a cued object than one that takes place in an uncued object, even when the distance between cue and target is kept fixed. To control shape familiarity, objects in the current study were randomly-generated irregular polygons known as Attneave shapes. Experiment 1 showed that SOA exists for these irregular shapes, even when participants are unfamiliar with them. In Experiment 2, participants first underwent training designed to familiarize them with a subset of the Attneave shapes used in Experiment 1. Again there was a significant SOA. If object-based attention is dependent upon object familiarity, we hypothesized that SOA, measured in terms of reaction time, should be greater in Experiment 2 than Experiment 1. Although there was a numerical increase in the reaction time signature of SOA in Experiment 2, this effect was not significant. While this does not strictly support our hypothesis, several aspects of this study suggest that object familiarity does play some role in mediating object-based attention. / Thesis (BS) — Boston College, 2013. / Submitted to: Boston College. College of Arts and Sciences. / Discipline: Psychology Honors Program. / Discipline: Psychology.

Astrophysical compact objects --- white dwarfs (WDs), neutron stars (NSs), and stellar mass black holes (BHs) --- mark the endpoints of normal stellar evolution. Their birth is often associated with dramatic explosions known as core-collapse supernovae (SNe). Such SNe are archetypal ``transients'' --- astronomical events which produce detectable emission for only a limited period of time (measurable over human timescales). This dissertation investigates the astrophysical implications of the formation and destruction of compact objects with particular focus on the transient phenomena that may be produced in such events. Part I is devoted to the ``death'' of compact objects by their coalescence with a binary companion. Such compact object binaries are driven towards merger by the extraction of orbital energy in the form of gravitational-waves (GW), and are thus prime targets for current and future GW detectors. In the first two chapters of Part I we consider the merger of a WD with a NS companion, beginning with Chapter 2, in which we explore the nuclearly-reactive accretion flow produced in the aftermath of such mergers and the possible `SN-like' transient it may give rise to. We continue in Chapter 3 by proposing that the late-time evolution of this post-merger accretion disk may result in terrestrial planet formation, broadly consistent with the mysterious ``pulsar planets'' observed orbiting PSR B1257+12. We shift our attention in the next couple chapters of this first part of the dissertation to binary NS mergers. In Chapter 4 we address the question of disk formation in the aftermath of the collapse of a rigidly-rotating supramassive NS, which is directly applicable to various models of gamma-ray bursts (GRBs). In Chapter 5 we utilize both GW and electromagnetic signatures of the first observed NS merger GW170817 to place new constraints on the NS equation of state. Finally, in Part II of this dissertation, we explore the connection between transient phenomena ranging from long- and ultra-long- GRBs, to energetic super-luminous SNe (SLSNe) and fast radio bursts (FRB), and relate these to the ``birth'' of a rapidly rotating highly-magnetized NS, a millisecond ``magnetar''. In Chapter 6 we show that both jetted and thermal transients (namely a GRB and a SLSN) can be powered simultaneously by such magnetars, and explore the various observational implications of this connection. We end with Chapter 7 in which we study the photo-ionization of the medium surrounding a newly born magnetar, discussing the observational signatures related to the escape of this ionizing radiation. We additionally address the propagation of radio waves and the dispersion measure induced by such photo-ionization and apply these to show that FRBs are broadly consistent with having young magnetars as their progenitors.

許曉東. / "2001年6月" / 論文 (哲學碩士)--香港中文大學, 2001. / 參考文獻 (leaves 112-114) / 附中英文摘要. / "2001 nian 6 yue" / Xu Xiaodong. / Lun wen (zhe xue shuo shi)--Xianggang Zhong wen da xue, 2001. / Can kao wen xian (leaves 112-114) / Fu Zhong Ying wen zhai yao. / Chapter 第一章 --- 遼代玉器硏究的回顧與考古材料 --- p.（1) / Chapter 第一節 --- 硏究的緣起 --- p.（1) / Chapter 第二節 --- 硏究的回顧 --- p.（3) / Chapter 第三節 --- 考古材料 --- p.（6) / Chapter 第二章 --- 遼代玉器的製作與使用 --- p.（13) / Chapter 第一節 --- 玉器的製作 --- p.（13) / Chapter (1) --- 遼代手工業概況 --- p.（13) / Chapter (2) --- 多層次的生產組織形式 --- p.（18) / Chapter (3) --- 製作技術 --- p.（22) / Chapter 第二節 --- 玉器的使用 --- p.（22) / Chapter (1) --- 朝廷用玉 --- p.（23) / Chapter (2) --- 日常用玉 --- p.（27) / Chapter (3) --- 賞賜與貢奉 --- p.（29) / Chapter (4) --- 朝聘往來 --- p.（30) / Chapter (5) --- 佛教用玉 --- p.（32) / Chapter (6) --- 喪葬用玉 --- p.（33) / Chapter 第三章 --- 遼代玉器的形制分析與分期 --- p.（40) / Chapter 第一節 --- 形制分析 --- p.（40) / Chapter (1) --- 玉帶 --- p.（40) / Chapter (2) --- 碗 --- p.（43) / Chapter (3) --- 杯 --- p.（45) / Chapter (4) --- 瓶 --- p.（47) / Chapter (5) --- 盒 --- p.（48) / Chapter (6) --- 組佩 --- p.（49) / Chapter (7) --- 肖生玉器 --- p.（53) / Chapter (8) --- 帶T形、心形墜之項飾 --- p.（55) / Chapter (9) --- 胸飾與臂飾 --- p.（57) / Chapter (10) --- 分髮簪、珠鏈、瓔珞 --- p.（59) / Chapter (11) --- 轡飾 --- p.（60) / Chapter (12) --- 飛天、佛塔、舍利罐、斧錘形器、金剛杵、海螺、法輪 --- p.（61) / Chapter (13) --- 水盂、硯、圍棋子、臂韛、嘎拉哈 --- p.（64) / Chapter (14) --- 花冠形飾、葉形飾、彎月形飾、三角形飾片、玉竹節… --- p.（65) / Chapter (15) --- 璧、玦、環、勾雲形器、玉錢、帽形飾、器柄 --- p.（66) / Chapter 第二節 --- 分期 --- p.（67) / Chapter (1) --- 早期 --- p.（68) / Chapter (2) --- 中期 --- p.（69) / Chapter (3) --- 晚期 --- p.（70) / Chapter 第四章 --- 遼代玉器與唐、宋、金玉器之比較 --- p.（73) / Chapter 第一節 --- 遼代玉器之特色 --- p.（73) / Chapter (1) --- 選材 --- p.（73) / Chapter (2) --- 工藝 --- p.（74) / Chapter (3) --- 文化構成 --- p.（75) / Chapter 第二節 --- 與唐代玉器之比較 --- p.（75) / Chapter (1) --- 器形 --- p.（75) / Chapter (2) --- 玉雕工藝與表現技法 --- p.（79) / Chapter (3) --- 對金銀器的借鑒 --- p.（82) / Chapter 第三節 --- 與宋代玉器之比較 --- p.（83) / Chapter (1) --- 鏤雕、淺浮雕技藝的吸收 --- p.（83) / Chapter (2) --- 寫實藝術風格的借鑒 --- p.（85) / Chapter (3) --- 仿古器的製作 --- p.（86) / Chapter (4) --- 中原傳統吉祥意象的接受 --- p.（86) / Chapter 第四節 --- 與金代玉器之比較 --- p.（89) / Chapter (1) --- 雕刻技法 --- p.（89) / Chapter (2) --- 題材 --- p.（90) / Chapter 第五章 --- 相關問題的探討 --- p.（97) / Chapter 第一節 --- 玉器發展的新機遇 --- p.（97) / Chapter 第二節 --- 多元文化因素的融合與民族特色的淡化 --- p.（100) / Chapter (1) --- 多元文化因素的融合 --- p.（100) / Chapter (2) --- 民族特色的淡化 --- p.（104) / Chapter 第三節 --- 歷史定位 --- p.（106) / Chapter 第四節 --- 硏究展望 --- p.（108) / 附錄 / 附錄一參考書目 --- p.（1) / 附錄二遼、五代、北宋、金紀年對照表 --- p.（2) / 附錄三遼代出土玉器一覽表 --- p.（3~1) / 附錄四圖版目錄 --- p.（4) / 附錄五彩色圖版說明 --- p.（5~1) / 附錄六黑白圖版 --- p.（6~1) / 圖錄七彩色圖版 --- p.（7)

Lau, Hoi Kwan. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 208-212). / Abstracts in English and Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Gravitational wave astronomy --- p.1 / Chapter 1.2 --- Stellar pulsation and gravitational radiation --- p.3 / Chapter 1.3 --- Outline --- p.5 / Chapter 2 --- Hydrostatic stellar structure --- p.8 / Chapter 2.1 --- Structural equation --- p.9 / Chapter 3 --- Finite temperature equations of state of nuclear matter --- p.13 / Chapter 3.1 --- Finite temperature ordinary nuclear matter --- p.13 / Chapter 3.2 --- Strange Quark Matter --- p.15 / Chapter 3.3 --- Equilibrium and Dynamic EOS --- p.16 / Chapter 4 --- Stellar pulsation and gravitational radiation --- p.19 / Chapter 4.1 --- Linearized theory of general relativity --- p.19 / Chapter 4.2 --- Stellar oscillation --- p.25 / Chapter 4.3 --- Quasi-normal Mode --- p.28 / Chapter 4.3.1 --- f mode --- p.29 / Chapter 4.3.2 --- p mode --- p.29 / Chapter 4.3.3 --- g mode --- p.30 / Chapter 4.3.4 --- w mode --- p.31 / Chapter 5 --- Gravitational wave spectrum of hot compact stars --- p.32 / Chapter 5.1 --- Numerical results --- p.32 / Chapter 5.1.1 --- Temperature effect on QNM --- p.32 / Chapter 5.1.2 --- Temperature effect and QS model --- p.38 / Chapter 5.1.3 --- QNM shift due to phase transition --- p.41 / Chapter 5.2 --- Summary and prospective --- p.48 / Chapter 6 --- Universality of fundamental mode and spacetime mode --- p.50 / Chapter 6.1 --- Review --- p.50 / Chapter 6.2 --- Generic proposal of universalities --- p.53 / Chapter 6.2.1 --- Moment of Inertia --- p.54 / Chapter 6.2.2 --- Gravitational wave spectrum --- p.57 / Chapter 6.3 --- Universality on moment of inertia --- p.63 / Chapter 6.4 --- Origin of universality --- p.70 / Chapter 6.4.1 --- Tolman VII model --- p.71 / Chapter 6.4.2 --- Polytropic Model --- p.76 / Chapter 6.5 --- Application of universality --- p.82 / Chapter 6.6 --- Summary --- p.89 / Chapter 7 --- Quark star properties and gravity mode oscillation --- p.92 / Chapter 7.1 --- Introduction --- p.92 / Chapter 7.2 --- g mode frequencies of quark stars --- p.94 / Chapter 7.2.1 --- Temperature profile and p mode frequency --- p.96 / Chapter 7.2.2 --- Strange quark mass and Yp mode frequency --- p.104 / Chapter 7.3 --- Summary --- p.108 / Chapter 8 --- Gravitational radiation excitation by infalling shell --- p.111 / Chapter 8.1 --- Introduction --- p.111 / Chapter 8.2 --- Formalism --- p.116 / Chapter 8.2.1 --- Connection between star and vacuum --- p.117 / Chapter 8.2.2 --- Matter source --- p.121 / Chapter 8.2.3 --- Geodesic --- p.124 / Chapter 8.2.4 --- Source of infalling dust shell --- p.126 / Chapter 8.2.5 --- Green's function --- p.127 / Chapter 8.3 --- Gravitational Wave excitation by collapsing shell --- p.130 / Chapter 8.4 --- Features of radiation --- p.138 / Chapter 8.4.1 --- Power spectrum --- p.138 / Chapter 8.4.2 --- Wave function --- p.144 / Chapter 8.4.3 --- Energy of excitation --- p.147 / Chapter 8.5 --- Non-adiabatic oscillation --- p.153 / Chapter 8.5.1 --- Mathematical Background --- p.154 / Chapter 8.5.2 --- Numerical results --- p.158 / Chapter 8.6 --- General relativistic simulation --- p.163 / Chapter 8.6.1 --- Technical briefing --- p.163 / Chapter 8.6.2 --- Numerical results --- p.166 / Chapter 8.7 --- Summary --- p.174 / Chapter 9 --- Conclusion and remarks --- p.178 / Chapter A --- Unit conversions --- p.183 / Chapter B --- Series expansion of quark star EOS --- p.185 / Chapter C --- Accuracy of simplified mode extraction scheme --- p.188 / Chapter D --- Computation of moment of inertia --- p.193 / Chapter E --- Comment of exactness of inference scheme --- p.195 / Chapter E.1 --- Precision of the mass inferred --- p.195 / Chapter E.2 --- Accuracy of universality combinations --- p.199 / Chapter F --- Calculation of sound speed --- p.202 / Chapter G --- Mode extraction of non-adiabatic oscillation --- p.204 / Bibliography --- p.208

Consider the problem of designing the path of a camera in 3D. As we may identify each camera position with a member of the Euclidean motions, SE(3), the problem may be recast mathematically as constructing interpolating curves on the (non-Euclidean) space SE(3). There exist many ways to formulate this problem, and indeed many solutions. In this thesis we shall examine solutions based on simple geometric constructions, with the goal of discovering well behaved and computable solutions. In affine spaces there exist elegant solutions to the problem of curve design, which are collectively known as the techniques of Computer Aided Geometric Design (CAGD). The approach of this thesis will be the generalization of these methods and an examination of computation on matrix Lie groups. In particular, the Lie groups SO(3) and SE(3) will be examined in some detail.

An exploration into the possibilities of surfaces as three dimensional forms through abstraction and movement. Through manipulation and the transition from two dimensional and three dimensional surfaces become adaptable for use as functional objects, furniture and spaces as they come together to create designed compositions based on scale, material, fabrication process and meaning. The following writing hopes to present a working statement of methodology for design across the three-dimensional design spectrum, from small objects, to furniture prototypes, to architectural and interior scale concepts.