司徒衛 : 嶺南校徽設計者 = Szto Wai : designer of the Lingnan emblem

此書錄由嶺南大學1947年超社歐陽讓學長編著，內容以嶺南校徽及其設計者司徒衛先生為主題，表揚他對嶺南教育的貢獻。抗戰時期，嶺南大學曾多次遷校，歐陽讓學長特別就1942-1944年抗日戰爭後期，記述舊廣州嶺南大學和附中遷校至廣東北部韶關仙人廟嶺大村的事蹟。 歐陽讓學長於書中撰文回憶當年於嶺大村上課時的軼事，介紹由司徒衛先生為嶺南創作的校徽背景，司徒衛先生應當時李應林校長的邀請，協助統籌建設嶺大村，並將當時校園及大村周圍景觀作畫，為粵北戰時嶺南校舍留下珍貴紀錄。作者選取了當中九幀水彩畫，附上中英對照的註釋，期望文章能送給早年嶺南人緬懷過去戰時的苦與樂，亦鼓勵嶺南的後來者，以司徒衛先生為榜樣，承傳嶺南歸屬感，以作為嶺南一分子而自豪，發揚薪火相傳的嶺南精神。 This publication was authored by IR AU-YOUNG Young, Lingnan alumni of Class 1947, with main purpose to appraise the contribution of Mr. Szto Wai, the designer of Lingnan Emblem, for Lingnan. During the Sino-Japanese War (1942-1944), Lingnan evacuated from Hong Kong and re-opened in Shao Kwan, the Northern part of Kwangtung Province. Mr. Szto Wai, together with President Lee Y. L. re-developed a new University campus at Taitsuen, some 30 miles from Shaokwan, a nearby railway station called Sin Yan Miu ( Miu means temple). Mr. Szto Wai later created a series of watercolours and sketches of Taitsuen campus, which are now the most important and valuable records documenting Lingnan history at Taitsuen. Mr. AU-YOUNG chronicle his memory at Taitsuen and introduced the background about the creation of Lingnan Emblem by Mr. Szto Wai. Mr. AU-YOUNG chose nine paintings of Szto Wai, supplementing each with bilingual description in both Chinese and English. This publication not only to serves to muse those alumni to recall those remote by-gone days but also enhance the young Lingnanians to learn the emblem designer\u27s devotion and contribution to Lingnan over 40 years. [內容撮要由嶺南檔案室撰寫 Description compiled by Lingnan Archives ]https://commons.ln.edu.hk/lingnan_history_bks/1017/thumbnail.jp

Modeling foreign economic policy in strategic setting: the automotive industry of the U.S. and Japan

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Includes bibliographical references (leaves 29-30).The purpose of my study is to examine how the United States and Japan interact in a strategic setting on foreign economic issues. Since relations between the two countries have been developing for several decades now, I will look into: I) the historical component of the relationship between Japan and the U.S. through a case study, and 2) the theoretical implications through an experiment. Besides historical significance, the case has important theoretical ramifications for the study of foreign interactions with strategic information. The theoretical aspect would help to explain how the U.S. makes decisions for current issues. 3) I will also introduce an analytical component to model and study foreign economic relations between these countries. Foreign economic policy is one of the top priorities for the U.S. government as it enters the 21st century. As the United States rose as a world power, foreign economic relations with other countries along with security interests became of up-most importance. The U.S. government has taken the role of leader all over the world at the United Nations, in the Middle East, Europe, and in Asia. Even with the U.S. as a world leader in the post cold war era, competition is becoming fiercer and economic strategy must be keen. In order to keep military peace around the world as well as economic prosperity, world leaders must not take foreign affairs lightly. Notably important is the economic aspect of foreign relations. With a globalization of markets, all countries depend on one another to provide goods and services for their people. Investment and trade are so widely abundant that economic relations must be cordial as well as strategic. Countries must be cooperative and knowledgeable of economic factors. For this study, I examined a specific case study in which the U.S. was in a dispute with a foreign country and how the U.S. dealt with the situation. This particular dispute spans a timeline of 15 years and involves the automotive industry of Japan and the U.S. Next, I used an experiment to gather empirical data to further explore decision making in foreign policy. I employed 26 students as subjects for an experiment run on the Program for Foreign Policy Decision Making's computerized decision board developed by Dr. Alex Mintz. The subjects are presented with a scenario modeling the historical dispute between Japan and the U.S. From the data, evidence can be drawn to determine the "why" of each student's decision. This study seeks to show that there is a pattern of decision-making in U.S. foreign policy and can be modeled through decision-making theories

Recording and quantification of ultrasonic echolocation clicks from free-ranging toothed whales

Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part I: Oceanographic Research Papers 54 (2007): 1421-1444, doi:10.1016/j.dsr.2007.04.020.Toothed whales produce short, ultrasonic clicks of high directionality and source level to probe their environment acoustically. This process, termed echolocation, is to a large part governed by the properties of the emitted clicks. Therefore derivation of click source parameters from free-ranging animals is of increasing importance to understand both how toothed whales use echolocation in the wild and how they may be monitored acoustically. This paper addresses how source parameters can be derived from free-ranging toothed whales in the wild using calibrated multi-hydrophone arrays and digital recorders. We outline the properties required of hydrophones, amplifiers and analog to digital converters, and discuss the problems of recording echolocation clicks on the axis of a directional sound beam. For accurate localization the hydrophone array apertures must be adapted and scaled to the behavior of, and the range to, the clicking animal, and precise information on hydrophone locations is critical. We provide examples of localization routines and outline sources of error that lead to uncertainties in localizing clicking animals in time and space. Furthermore we explore approaches to time series analysis of discrete versions of toothed whale clicks that are meaningful in a biosonar context.This work was supported by a Steno Fellowship from the Danish National Science Foundation to PTM, a grant from the Carlsberg Foundation to MW with additional support to the authors from Reson, the Novo Nordisk Science Foundation, Aarhus University Research Fund, and the Oticon Foundation

Why Markets Could (But Don't Currently) Solve Resource Allocation Problems in Systems

Using market mechanisms for resource allocation in distributed systems is not a new idea, nor is it one that has caught on in practice or with a large body of computer science research. Yet, projects that use markets for distributed resource allocation recur every few years [1, 2, 3], and a new generation of research is exploring market-based resource allocation mechanisms [4, 5, 6, 7, 8] for distributed environments such as Planetlab, Netbed, and computational grids. This paper has three goals. The first goal is to explore why markets can be appropriate to use for allocation, when simpler allocation mechanisms exist. The second goal is to demonstrate why a new look at markets for allocation could be timely, and not a re-hash of previous research. The third goal is to point out some of the thorny problems inherent in market deployment and to suggest action items both for market designers and for the greater research community. We are optimistic about the power of market design, but we also believe that key challenges exist for a markets/systems integration that must be overcome for market-based computer resource allocation systems to succeed.Engineering and Applied Science

Logarithmic perturbation theory for quasinormal modes

Logarithmic perturbation theory (LPT) is developed and applied to quasinormal modes (QNMs) in open systems. QNMs often do not form a complete set, so LPT is especially convenient because summation over a complete set of unperturbed states is not required. Attention is paid to potentials with exponential tails, and the example of a Poschl-Teller potential is briefly discussed. A numerical method is developed that handles the exponentially large wavefunctions which appear in dealing with QNMs.Comment: 24 pages, 4 Postscript figures, uses ioplppt.sty and epsfig.st

Analytical modeling and vibration analysis of partially cracked rectangular plates with different boundary conditions and loading

This study proposes an analytical model for vibrations in a cracked rectangular plate as one of the results from a program of research on vibration based damage detection in aircraft panel structures. This particular work considers an isotropic plate, typically made of aluminum, and containing a crack in the form of a continuous line with its center located at the center of the plate and parallel to one edge of the plate. The plate is subjected to a point load on its surface for three different possible boundary conditions, and one examined in detail. Galerkin's method is applied to reformulate the governing equation of the cracked plate into time dependent modal coordinates. Nonlinearity is introduced by appropriate formulations introduced by applying Berger's method. An approximate solution technique—the method of multiple scales—is applied to solve the nonlinear equation of the cracked plate. The results are presented in terms of natural frequency versus crack length and plate thickness, and the nonlinear amplitude response of the plate is calculated for one set of boundary conditions and three different load locations, over a practical range of external excitation frequencies

Quasinormal Modes of Dirty Black Holes

Quasinormal mode (QNM) gravitational radiation from black holes is expected to be observed in a few years. A perturbative formula is derived for the shifts in both the real and the imaginary part of the QNM frequencies away from those of an idealized isolated black hole. The formulation provides a tool for understanding how the astrophysical environment surrounding a black hole, e.g., a massive accretion disk, affects the QNM spectrum of gravitational waves. We show, in a simple model, that the perturbed QNM spectrum can have interesting features.Comment: 4 pages. Published in PR

Folate-targeted pH-responsive calcium zoledronate nanoscale metal-organic frameworks: Turning a bone antiresorptive agent into an anticancer therapeutic

Zoledronate (Zol) is a third-generation bisphosphonate that is widely used as an anti-resorptive agent for the treatment of cancer bone metastasis. While there is preclinical data indicating that bisphosphonates such as Zol have direct cytotoxic effects on cancer cells, such effect has not been firmly established in the clinical setting. This is likely due to the rapid absorption of bisphosphonates by the skeleton after intravenous (i.v.) administration. Herein, we report the reformulation of Zol using nanotechnology and evaluation of this novel nanoscale metal-organic frameworks (nMOFs) formulation of Zol as an anticancer agent. The nMOF formulation is comprised of a calcium zoledronate (CaZol) core and a polyethylene glycol (PEG) surface. To preferentially deliver CaZol nMOFs to tumors as well as facilitate cellular uptake of Zol, we incorporated folate (Fol)-targeted ligands on the nMOFs. The folate receptor (FR) is known to be overexpressed in several tumor types, including head-and-neck, prostate, and non-small cell lung cancers. We demonstrated that these targeted CaZol nMOFs possess excellent chemical and colloidal stability in physiological conditions. The release of encapsulated Zol from the nMOFs occurs in the mid-endosomes during nMOF endocytosis. In vitro toxicity studies demonstrated that Fol-targeted CaZol nMOFs are more efficient than small molecule Zol in inhibiting cell proliferation and inducing apoptosis in FR-overexpressing H460 non-small cell lung and PC3 prostate cancer cells. Our findings were further validated in vivo using mouse xenograft models of H460 and PC3. We demonstrated that Fol-targeted CaZol nMOFs are effective anticancer agents and increase the direct antitumor activity of Zol by 80-85% in vivo through inhibition of tumor neovasculature, and inhibiting cell proliferation and inducing apoptosis