Synthesis and self-assembly properties of fulleropyrrolidine prepared by Prato reaction

International audienceMolecular self-assembly is considered as a promising way to control the manufacture of new materials and their integration into hybrid devices with novel properties. In this work we have synthesized a fulleropyrrolidine bearing a phenylacetylene moiety via the Prato reaction. The characterization of the fulleropyrrolidine by nuclear magnetic resonance and optical spectroscopy is reported, and its self-assembly by crystallization study has been investigated according to the used solvents. If the solvent that effectively solubilizes fullerene derivative is tetrahydrofurane, the nano-square plates with 1–3 μ m in length and 50–100 nm in thickness are formed, while if the solvent is toluene, 5 μ m diameter ‘nano-flowers’ are obtained

An object-based approach to image/video-based synthesis and processing for 3-D and multiview televisions

This paper proposes an object-based approach to a class of dynamic image-based representations called "plenoptic videos," where the plenoptic video sequences are segmented into image-based rendering (IBR) objects each with its image sequence, depth map, and other relevant information such as shape and alpha information. This allows desirable functionalities such as scalability of contents, error resilience, and interactivity with individual IBR objects to be supported. Moreover, the rendering quality in scenes with large depth variations can also be improved considerably. A portable capturing system consisting of two linear camera arrays was developed to verify the proposed approach. An important step in the object-based approach is to segment the objects in video streams into layers or IBR objects. To reduce the time for segmenting plenoptic videos under the semiautomatic technique, a new object tracking method based on the level-set method is proposed. Due to possible segmentation errors around object boundaries, natural matting with Bayesian approach is also incorporated into our system. Furthermore, extensions of conventional image processing algorithms to these IBR objects are studied and illustrated with examples. Experimental results are given to illustrate the efficiency of the tracking, matting, rendering, and processing algorithms under the proposed object-based framework. © 2009 IEEE.published_or_final_versio

Growth of long-period gratings in H₂-loaded fiber after 193-nm UV inscription

2000-2001 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

Self-help cognitive-behavioral therapy for insomnia (CBT-1): a systematic review of randomized controlled trials

Abstract Theme: Insomnia - new insight into development and manageThis study aimed to review current literature, examine the efficacy, adherence, acceptability, and attrition rate of self-help CBT-I, and to explore possible factors that might contribute to the effectiveness of the treatment. A systematic review was performed up to June 2012 on studies published in 6 major electronic databases. Two researchers performed study identification, data extraction, and methodological quality evaluation. Meta-analyses of self-help CBT-I vs. waiting-list, routine care, or no treatment, therapist-administered CBT-I, and placebo treatment were performed. We identified 20 randomized controlled trials (RCT) that met inclusion criteria. When compared to waiting-list control, self-help CBT-I achieved a moderate to large effect size on improving sleep and reducing sleep-related cognitions and anxiety and depressive symptoms. Therapist-administered CBT-I was slightly better than self-help CBT-I. Subgroup analyses supported the beneficial effect of telephone consultation, but not for “full” multi-component CBT and programs lasting for 6 or more weeks. Treatment adherence, acceptability, perceived usefulness, and credibility were reported as satisfactory. Based on the results of the systematic review, we have designed a Chinese-language self-help CBT-I and now conducting a RCT to evaluate the efficacy of Internet-based self-help CBT-I in Chinese population.postprin

Evolution in public benefits negotiation processes

Thesis (M.C.P. and S.M.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2007.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (p. 84-86).Urban redevelopment projects involve three parties: (1) the public sector (e.g. public officials), (2) the private sector (e.g. developers), and (3) the community (e.g. residents and community groups). Traditionally, decision-making power in urban redevelopment projects resided between the public and private sectors, with little authority given to communities. The development of Community Benefits Agreements (CBAs) were a reaction to this imbalance and have helped communities gain influence in the redevelopment process. These agreements are "legally" binding contracts between a developer and community group(s) - to ensure that development projects benefit local community residents. Their creation is rooted in several decades of failed urban policies and the public learning that has taken place since Urban Renewal. CBAs first appeared in Los Angeles in 2001 and have since taken root across the country in such geographically diverse places as Denver, Milwaukee, and New York City. These agreements represent a significant evolution in collective bargaining, the ability of varied entities to come together and take a common position on a topic, and the ability of communities to secure benefits from developers. This thesis examines why these agreements came into existence, the process by which they are implemented, and how they have been employed. It will look at how these agreements have created greater overall value for all three sectors involved in publicly subsidized redevelopment projects and how to improve upon the community benefits negotiation process.by William Ho.M.C.P.and S.M

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هدف از پژوهش حاضر بررسی نقش میانجی ابعاد کمال گرایی در رابطۀ بین ابعاد فرزندپروری واهمال کاری تحصیلی بود. بدین منظور 490 دانشجو ( 211 پسر و 279 دختر ) از دانشگاه شه یدبهشتی تهران که به شیوة نمونه گیری خوشه ای با واحد نمونه ای کلاس انتخاب شده بودند،پرسشنامۀ سبک فرزندپروری ادراک شده (نقاشیان، 1358 )، مقیاس ارزیابی اهمال کار ی نسخۀدانشجو (سولومون و راث بلوم، 1984 ) و مقیاس چندبعدی کمال گرایی (فلت و هویت، 1991 ) راتکمیل کردند. برای تحلیل اطلاعات از روش آماری رگرسیون چندگانه استفاده شد. نتایج حاصل ازتحلیل رگرسیون نشان داد که بعد محبت طرد فرزندپروری به صورت مستقیم و منفی اهمال کاریتحصیلی و کمال گرایی جامعه مدار و به صورت مستقیم و مثبت کمال گرایی خودمدار و همچنین بهصورت غیر مستقیم و منفی و به واسطۀ ابعاد کمال گرایی، اهمال کاری تحصیلی را پی شبینی میکند .همچنین نتایج نشان داد که بعد کنترل آزادی فرزندپروری به صورت غیرمستقیم و مثبت و تنها ازطریق بعد کمال گرایی جامعه مدار و نه بعد کمال گرایی خودمدار اهمال کاری تحصیلی را پ یش بین یمیکند

Adaptive reuse of built heritage in Hong Kong: integrated conservation approach for development

In this paper, references will be drawn from discussions at the one-day international conference organised by RICS on 9 January 2015. Several important case studies in Hong Kong and overseas were shared and discussed at the conference, from which good practices could be distilled for Hong Kong’s unique challenges. References will also be made to good practice where useful.published_or_final_versio