WorldWideScience

Sample records for cultural relic dragon

  1. China's New Cultural Relics Protection Law

    Institute of Scientific and Technical Information of China (English)

    XinYuan

    2003-01-01

    The 30th session of the standing committee of the ninth National People's Congress approved the amended Cultural Relics Protection Law of the People's Republic of China. The new 12,000-word law has a total of 80 articles in eight chapters: General Principles, Unmovable Cultural Relics, Archaeological Excavation, Nuseums' Cultural Relics,

  2. Tibetan Cultural Interpretations of Two Relics Unearthed in Sanxingdui

    Institute of Scientific and Technical Information of China (English)

    Tong Mei

    2016-01-01

    This article is the fourth article re-lated to the research of “Zhangzhung·rGyalron· Sanxingdui and Jinsha”—Tibetan cultural interpre-tations of relics unearthed in Sanxingdui and Jin-sha. The main focus of the article is Tibetan cul-tural interpretations of the vertical-eyed bronze mask and the copper statue of a man with an ani-mal head crown in Sanxingdui Museum. 1 . Vertical-eyed bronze mask and Miwo Lon-glong The bronze cultural relics unearthed in Sanx-ingdui or even Jinsha have broad and deep links to ancient Tibetan culture. The vertical-eyed bronze mask is the most typical of the numerous bronze objects depicting human heads. In the following discussion, we would like to give an interpretation of the symbolic meaning of the bronze objects de-picting human heads. In order to draw inferences about other cases from one instance, we would like to choose two typical cases: choosing the vertical-eyed bronze mask as our model of cultural relic, and choosing langshi jiazu ( the Lang family clan) as our model of Tibetan ancient literature. It is generally stated that the eyes of the verti-cal-eyed bronze mask kept in Sanxingdui museum roughly meets the appearance of the Shu people ’ s ancestors, the Cancong, who are recorded as hav-ing “vertical eyes” in the historical books. Some people also believe that “vertical eyes” means“upright eyes”, just like the eye in the forehead of the God Erlang in Chinese ancient myth, so the image might be a statue of an ancestor god. Addi-tionally, some connect it with the frontlet of kuilong ( a sacred dragon in Chinese myth ) , and believe that it is related to zhulong( another sacred dragon in Chinese myth) who has a human head, a dragon ( snake) body, and “upright eyes”. Langshi Jiazu is an important document for studying the political and religious unification sys-tem in Tibetan areas during the Yuan, Ming and Qing dynasties, meanwhile, it is also an essential material for the study of the Gesar Epic

  3. Investigation of laser cleaning on bronze cultural relics

    Science.gov (United States)

    Ling, Xiulan; Wang, Gao; Zhang, Chen

    2016-05-01

    The effects of laser cleaning on the corrosion layers of bronze cultural relics were studied using a pulsed fiber laser. The laser cleaning threshold value of the corrosion layers was obtained. It was found that the corrosion layer was removed successfully by employing a laser fluence value of 0.32 J cm-2 and scanning for three times. To obtain experimental evidence, laser con-focal scanning microscopy, scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), laser induced breakdown spectroscopy (LIBS) and laser Raman spectroscopy were employed to investigate the cleaning efficiency of corrosion layers on specimens.

  4. SCRMS: An RFID and Sensor Web-Enabled Smart Cultural Relics Management System.

    Science.gov (United States)

    Xiao, Changjiang; Chen, Nengcheng; Li, Dandan; Lv, You; Gong, Jianya

    2016-12-30

    Cultural relics represent national or even global resources of inestimable value. How to efficiently manage and preserve these cultural relics is a vitally important issue. To achieve this goal, this study proposed, designed, and implemented an RFID and Sensor Web-enabled smart cultural relics management system (SCRMS). In this system, active photovoltaic subtle energy-powered Radio Frequency Identification (RFID) is used for long-range contactless identification and lifecycle management of cultural relics during their storage and circulation. In addition, different types of ambient sensors are integrated with the RFID tags and deployed around cultural relics to monitor their environmental parameters, helping to ensure that they remain in good condition. An Android-based smart mobile application, as middleware, is used in collaboration with RFID readers to collect information and provide convenient management for the circulation of cultural relics. Moreover, multiple sensing techniques are taken advantage of simultaneously for preservation of cultural relics. The proposed system was successfully applied to a museum in the Yongding District, Fujian Province, China, demonstrating its feasibility and advantages for smart and efficient management and preservation of cultural relics.

  5. Language and Cross-Culture Understanding—Through Cross-Culture Study of the Word'Dragon'

    Institute of Scientific and Technical Information of China (English)

    周玲

    2016-01-01

    This essay contributes to the analysis of the significance of cross-culture understanding in connection with language. It is important and necessary to promote cross-cultural understanding in order to communicate with people from various cultural backgrounds with the development of globalization. This essay also gives the example of the word'dragon'to illustrate that the cross-culture understanding of language will make us communicate with each other more effectively.

  6. Talking about Dragon in the Dragon Year

    Institute of Scientific and Technical Information of China (English)

    Liu Zhiyang

    2012-01-01

    In the five-thousand-year history of Chinese nation,dragon is the embodiment of Chinese culture,It represents the profound cultural deposits and expresses the cultural features of China.The characteristics of dragon are snake's body,eagle's claws,deer's antlers and tiger's teeth-the most featured and powerful pans from various animals.It indicates that Chinese culture absorbs merits of other cultures and integrates them,which is also the distinctive feature of Chinese culture.

  7. X-ray fluorescence in investigations of cultural relics and archaeological finds

    Energy Technology Data Exchange (ETDEWEB)

    Musilek, Ladislav, E-mail: musilek@fjfi.cvut.cz [Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, 115 19 Praha 1 (Czech Republic); Cechak, Tomas; Trojek, Tomas [Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, 115 19 Praha 1 (Czech Republic)

    2012-07-15

    Some characteristic features of X-ray fluorescence (XRF) analysis make it an ideal method for investigations of cultural relics and archaeological finds. It has therefore become a standard method used in archaeometry. Paintings, frescos, manuscripts, pottery, metalwork, glass, and many other objects are analysed with the aim of recognising their materials, production technologies and origin, and for identifying counterfeits. This paper reviews various techniques used in XRF analyses of works of art, summarises the advantages and limitations of the method, and presents some typical examples of its use. The general review is supplemented by some techniques used and some results achieved at CTU-FNSPE in Prague. - Highlights: Black-Right-Pointing-Pointer Review of XRF analysis in archaeometry. Black-Right-Pointing-Pointer Instrumentation for XRF analysis with various sources of radiation. Black-Right-Pointing-Pointer Materials and artefacts, which can be measured and information, which can be obtained. Black-Right-Pointing-Pointer XRF analysis of artworks at the CTU Prague.

  8. Dragons as Amulets, Dragons as Talismans, Dragons as Counselors.

    Science.gov (United States)

    Stevenson, Robert G.

    1994-01-01

    Notes that, in diverse historical and cultural settings, dragons have served as protective amulets/powerful talismans to protect/enhance powers of those who possess them. Explores use of such personal symbols in dealing with personal adversity and suggests methods in which dragon symbol can be used to promote discussion of feelings, problems, and…

  9. 论文物保护科学研究的内容及原则%On the Content and Principles of Cultural Relics Conservation Science

    Institute of Scientific and Technical Information of China (English)

    杨坤

    2013-01-01

      The protection science of cultural relics belongs to a technical science interlacing the liberal arts and science, and its main contents include the research on cultural relic preservation environment, the material properties of cultural relics and restoration technology for cultural relics. This paper focuses on analysis and discussion on research methods for cultural relic conservation science, namely firstly studying the cultural relic preservation environment and material properties of cultural relics, so that we can grasp the cause and process of cultural relic"disease"and make reasonable remediation methods. At the same time, the importance of research on the environment and the contents of cultural relic reservation environment are discussed. Principle for cultural relic conservation mainly refers to specific theoretical and practical guidance to cultural relic conservation. Under the premise of without changing the status quo of cultural relics, this paper carries out in-depth discussion on the cultural relic conservation work, and discusses the cultural relic conservation and selection principles for conservation materials in archaeological site, finally concludes basic principles, hoping to provide experience for archaeologists.%  文物保护科学属于文理科相互交织的一门技术科学,主要内容包括对文物保存环境进行的研究、对文物材料性质进行的研究以及对文物修复技术进行的研究。本文对文物保护科学的研究方法进行重点分析和论述,也就是对文物保存环境和文物材料性质首先要进行研究,这样才可以掌握文物“病变”的原因与过程,才可能做到“对症下药”,才可以针对实际情况提出合理的整治方法。同时对环境研究的重要性以及文物保存环境主要包括的内容也进行讨论。文物保护原则主要是对文物保护进行具体的理论实践指导。本文在对文物原状不进行

  10. Relics Reduced to Rubble

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Quake damage leaves worst cultural relic loss in 60 years The deadly earthquake in Sichuan has not only taken tens of thousand of lives and left millions homeless, but it has also had a cultural impact. Standing on the rubble of a temple in Dujiangyan City that was heavily dam- aged after the May 12 earthquake,

  11. 文物犯罪的刑事政策分析%An Analysis of the Criminal Policy against Crimes related to Cultural Relics

    Institute of Scientific and Technical Information of China (English)

    许桂敏

    2012-01-01

    Crimes related to cultural relics are harmful to the society and should be punished. There are stipulations of crimes impairing the management of cultural relics in the criminal law of China. Cultural relics have witnessed the history of Chinese culture of more than 5000 years and thus are of great historic value and cultural value. Criminal policies play leading roles in the effective prevention and control of crimes related to cultural relics. The criminal policy of combining punishment with leniency is the best choice for the control and prevention of such crimes.%文物犯罪是危害社会应受惩罚的行为,我国刑法专门以妨害文物管理罪加以规定。文物是我国五千年文明史的见证,具有极高的历史价值和文化价值。如何有效预防和打击文物犯罪,刑事政策起到了引导作用。该宽则宽,该严则严,宽严相济的刑事政策是其最佳的选择。

  12. 民间龙舞文化旅游资源整合开发研究①--以安仁板凳龙石桥火龙为例%The integrated development of cultural tourism resources of folk dragon dance Research--On the Anren bench dragon stone dragon as an example

    Institute of Scientific and Technical Information of China (English)

    史明娜; 孙亮亮

    2015-01-01

    By using the method of literature,logical analysis and other research methods,on the Anren bench dragon and the stone dragon is the representative of the folk dragon dance culture of quality of historical culture and the origin of the myth of scanning, dragon culture process from cultural production situation formed interactive experience,but also stimulating economic development, culture and customs of dragon dance culture rich local experience show and profound cultural accumulation, cultural and artistic scene ornamental show authentic aspects of dragon dance culture and art attraction analysis,based on this proposed space-time dragon dance culture tourism street building, Long Wuwen in the travel scene reappearance,Dragon Culture Museum Construction of creative tourism, so as to promote the cultural heritage folk dragon dance and dragon dance culture tourism development.%采用文献资料法、逻辑分析法等研究方法,对以安仁板凳龙和石桥火龙为代表的民间龙舞文化精品进行了历史文化及起源神话扫描,从龙舞文化工艺文化制作形成互动体验的局面,同时也拉动经济发展、文化习俗体验展现当地龙舞文化的浓郁和深厚的文化积淀、文化艺术场景观赏展现龙舞文化艺术的本真性等方面进行旅游卖点分析,基于此提出龙舞文化旅游一条街打造、龙舞文化在旅游场景的时空再现、龙舞文化博物馆构建等旅游创意,以此促进民间龙舞文化传承及龙舞文化旅游发展。

  13. The aesthetic of dragon pattern elements in modern clothing

    Institute of Scientific and Technical Information of China (English)

    任倩慧

    2015-01-01

    Dragon pattern with a long history of traditional patterns,contains profound cultural connotation.This passage illustrate the aesthetic analysis of dragon pattern in modern clothing, analyze the aesthetic expression of dragon pattern with modern costume designer.

  14. 论妨害文物管理犯罪行为的刑法规制%Research on the Criminal Regulation of Jeopardizing Management of Cultural Relic

    Institute of Scientific and Technical Information of China (English)

    刘强

    2014-01-01

    The cultural relic, which is full of historical artistic and scientific values, is nonrenewable cultural resource. Meanwhile, it has high economic value. That is why it has become the target of criminals. In recent years, there have been more and more cases of excavating tombs, reselling and smuggling cultural relic. The chain-type of illegal acts has resulted in serious drain of precious cultural relic. To make high proifts, criminals resell or smuggle the cultural relic which is excavated from tombs with skillful methods of crime, making the cultural relic lfowing into circulation even the international markets. Therefore, immediate and effective measures must be taken to regulate this kind of crime, destroy the typical managing chain of“excavating-reselling-smuggling”, protect management orders of cultural relic and prevent cultural relic from lfowing away.%文物是不可再生的文化资源,具有丰富的历史价值、艺术价值和科学价值,同时也具有较高的经济价值,自然也就成为了犯罪分子侵害目标。近年来,盗掘古墓、倒卖文物、走私文物的现象日益猖狂,这种链条式的不法行为,使我国的珍贵文物大量流失,犯罪分子利用娴熟的作案手段,将盗掘而来的文物进行倒买倒卖或者走私,使其很快进入流通领域,甚至流向国际市场,获取高额利润。因此,必须及时有效地规制此类犯罪行为,击破文物类犯罪的“盗掘-倒卖-走私”的典型经营链条,保护国家的文物管理秩序,防止文物的大量流失。

  15. The Culture of Dragon and Lion Dance from the Perspective of Regional Culture%地域文化视野下舞龙舞狮文化研究

    Institute of Scientific and Technical Information of China (English)

    薛浩

    2014-01-01

    This paper takes the region culture as a background, the use of literature, logical reasoning and empirical analysis methods to sort out and interpretation of the dragon and lion dance origin,regional culture,specific culture origin traced regional dragon and lion,through the analysis of different local idea and regional folk, derived from different regions of dragon and lion sports and cultural theme, and based on the geographical and cultural theme on the dragon and lion dance routines, the formation of the regional theme dragon and lion culture. From the region culture characteristic and the dragon lion sports culture and the formation of cultural characteristics, combined with the theme of dragon and lion dance, dragon and lion dance derived from the basic feature of culture, the dragon and lion dance culture characteristics show: the dragon and lion dance nationality culture, folk culture of dragon and lion dance dragon dance lion, rich culture,dynamic,dragon and lion dance culture.%以地域文化为背景,运用文献资料、逻辑推理和实证分析等方法对龙狮起源、地域性文化现象进行梳理和解读,追朔地域性龙狮的特定文化(源,通过不同乡土理念与地域民俗的分析,导出不同地域龙狮运动特点与文化主题,并依托于地域文化主题串编舞龙舞狮套路,形成各地域性的主题龙狮文化。从地域文化特点与龙狮运动的文化形成出发,结合龙狮的主题文化特点,衍生出舞龙舞狮文化的基本特征,其舞龙舞狮文化特征表现为:舞龙舞狮文化的民族性,舞龙舞狮文化的民间性,舞龙舞狮文化的丰富性,舞龙舞狮文化的动态性。

  16. Research on Development Mode of Culture Tourism of Bohaiguo Relics%渤海国遗址文化旅游开发模式探究

    Institute of Scientific and Technical Information of China (English)

    于洪雁

    2013-01-01

    遗址文化旅游是在保护的前提下开发遗址,将遗址资源的价值转化为旅游价值,其核心是通过遗址的地域历史文化特色,来满足旅游者的文化需求。为更好地推进渤海国遗址文化旅游,应针对目前渤海国遗址现状,创新开发模式,按照核心层(遗址本体型)、过渡层(遗址文化延展型)、外围层(遗址自然生态延展型)三个层次开发,建设遗址公园、宗教寺观、历史文化产业园、主题公园等文化旅游项目。%Historical site tourism looks to attract tourists by culture and history of relics and generate economic benefits while preserving its ruins. We are committed to developing culture tourism products in Bohaiguo Relics. And we should innovate development mode based on its realities. That is to say, we should design and build relics park, temples, history and culture park and themed park at three levels, specifically, core-level, relics based;transitional level, history and culture based;region level, sound ecology based.

  17. Design and Implementation Based on Mobile GIS in Cultural Relics Information Collection System%基于移动GIS的文物信息采集系统的设计与实现

    Institute of Scientific and Technical Information of China (English)

    郑仁高; 恰汗·合孜尔

    2013-01-01

    许多文物及其生存环境受到严重威胁,迫切需要对现有文物进行普查.从传统的文物信息采集存在的问题出发,结合移动GIS在数据采集中的应用优势,分析了文物信息采集系统的需求,对移动端设备、系统架构和系统功能模块进行了设计.有效地实现了文物空间信息和属性信息的快速采集,达到了提高文物信息采集作业效率和采集数据快速入库的目的.%Many cultural relics and their survival environments are threatened, it is urgent needs census for the existing cultural relics. Began with the existing problems in cultural relics information collection, combined with the advantages of mobile GIS in data collection, the needs in cultural relics information system are analyzed, the system architecture, mobile terminal equipment and system function module are designed. Effectively realized information collection in spatial information and attribute information of a relic, the purposes of advancing the efficiency of cultural relics information collection and importing collection data to database fast are realized.

  18. Wave Dragon

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter; Sørensen, H. C.

    1998-01-01

    This paper concerns with the development of the wave energy converter (WEC) Wave Dragon. This WEC is based on the overtopping principle. An overview of the performed research done concerning the Wave Dragon over the past years is given, and the results of one of the more comprehensive studies......, concerning a hydraulic evaluation and optimisation of the geometry of the Wave Dragon, is presented. Furthermore, the plans for the future development projects are sketched....

  19. Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter; Friis-Madsen, Erik

    2008-01-01

    Since March 2003 a prototype of Wave Dragon has been tested in an inland sea in Denmark. This has been a great success with all subsystems tested and improved through working in an offshore environment. The project has proved the Wave Dragon device and has enabled the next stage, a production sized...

  20. Healthy Dragon

    Institute of Scientific and Technical Information of China (English)

    孙继山

    2005-01-01

    The Chinese economic dragon is healthy and dynamic. The dragorthead,Shanghai, is developing at a pace never before seen in world history, The dragon's body is also doing well, not least because there is tremendous competition across the country. Thus, four cities along the central Yangtze River Region are trying to strengthen their competitiveness.

  1. Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter; Friis-Madsen, Erik;

    2008-01-01

    Since March 2003 a prototype of Wave Dragon has been tested in an inland sea in Denmark. This has been a great success with all subsystems tested and improved through working in an offshore environment. The project has proved the Wave Dragon device and has enabled the next stage, a production sized...

  2. 我国古代两种珍稀宝玉石文物分析%An Analysis of Two Ancient Precious Gems Cultural Relics

    Institute of Scientific and Technical Information of China (English)

    董俊卿; 干福熹; 李青会; 顾冬红; 阚绪杭; 程永建

    2011-01-01

    为了科学辨别易混淆文物的材质,以蓝绿色和蓝紫色宝玉石文物为例,利用外束质子激发X射线荧光、便携式能量色散X射线荧光、激光拉曼光谱和X射线衍射分析等现代无损科技手段,从安徽蚌埠双墩一号春秋墓、河南洛阳烧沟东汉墓和新疆和田皮山古城唐代墓葬中甄别与鉴定出被误认为是绿松石和琉璃(玻璃)器的天河石串珠和青金石耳?及青金石管饰。简要阐述了这两种彩色宝玉石的矿物学特征及应用历史。这三件彩色宝玉石文物的发现,丰富了中国宝玉石史的研究内容,拓宽了对我国古代先民开采、引进及应用宝玉石的认识。%For the purpose of distinguishing the materials of confusable cultural relics scientifically,take the case of glaucous and ianthinus gems cultural relics,the amazonite bead,lapis lazuli earring and tube,erroneously assumed to be turquoise and coloured glaze,were respectively discriminated and identified from Shuangdun No.1 Tomb of Spring and Autumn Period in Bengbu,Anhui Province,Eastern Han Tomb in Shaogou,Luoyang,Henan Province,and Tang Tomb in Pishan Ancient City,Hetian,Xinjiang by using the modern nondestructive analytical methods,such as external beam proton induced X-ray emission(PIXE),portable energy dispersive X-ray fluorescence(PXRF),laser Raman spectroscopy and X-ray diffraction(XRD) analysis.Meanwhile,the mineralogical characteristics and application history of the two gems are also briefly described.The discovery of the three ancient gems cultural relics enriches the research contents of Chinese gems history,and broadens our understanding of our ancestors' mining,importing and using of gems.

  3. The Application of Digital Surveying in Three Gorges'Cultural Relics Protection%代测绘技术在三峡地面文物保护工程中的应用

    Institute of Scientific and Technical Information of China (English)

    郑书民

    2001-01-01

    In view of the specific conditions in historic relics protection surveying, this paper introduces the application of digital surveying and close range photogrammetry in Three Gorges' cultural relics protection and indicates its possible future use.%在给出文物保护测绘特点的基础上,介绍了现代测绘技术在三峡地面文物保护工作中的若干 应用,分析了测绘成果在即将展开的文物保护工程中应用的前景。

  4. The Comical Image of the Dragon in The Woman Warrior

    Institute of Scientific and Technical Information of China (English)

    艾露

    2013-01-01

    The figuration of the dragon is quite eye-catching and meaningful, particularly in the second episode of The Woman Warrior. By analyzing the image of the dragon in the text, and the relations of the dragon to the Chinese mythology and the tra⁃ditional Chinese medicine, this study argues Kingston has universalized the Chinese culture and exhibted her transnational world⁃view.

  5. Legal Construction on Protection of the Cultural Relics in the Museum of Ethnic Minority Groups%论民族博物馆文物保护的法制建设

    Institute of Scientific and Technical Information of China (English)

    宋才发

    2011-01-01

    The Chinese keep the fine tradition to protect cultural relics in accordance with law."The Law on Protection of Cultural Relics" is the high-level law and boosts law enforcement on cultural relics protection in museum.It is necessary to formulate "The Regulations on the Museum" to protect the ownership of cultural relics by using "Real Right Law".We should establish intangible cultural heritage protection system,perfect regulation system to safekeeping collections of ethnic museum,enhance protecting intellectual property rights of the cultural relic.The superior historical relics administration departments must administrate according to laws.%中国素有依法保护文物古迹的优良传统。《文物保护法》是各级立法机关开展文物立法的上位法,助推博物馆文物保护安全执法。要尽快制定出台《博物馆条例》,运用《物权法》公平保护文物的所有权,建立物质文化遗产的精神权利保护制度,完善民族博物馆藏品保管法规体系,提高馆藏文物知识产权保护力度,上级文物管理部门必须依法行政。

  6. Men and Women Compete for the Dragon Crown

    Institute of Scientific and Technical Information of China (English)

    1996-01-01

    THE dragon is the symbol of China, and the Chinese consider themselves descendants of the dragon. From April 30 to May 5 in 1995, the First National Dragon Dance Tournament was held in the Summer Palace of Chinese cultural heritage. Twenty dragon dance teams convened in Beijing and a fierce display of strength and beauty unfolded. The most eyecatching performance was by the only female participants—the Zhengmingsi

  7. Wave Dragon

    DEFF Research Database (Denmark)

    Kramer, Morten; Frigaard, Peter

    På foranledning af Löwenmark F.R.I, er der udført numeriske beregninger af Wave Dragons (herefter WD) armes effektivitet for forskellige geometriske udformninger. 5 geometriske modeller, hvor WD's arme er forkortet/forlænget er undersøgt for 3 forskellige drejninger af armene. I alt er 15...

  8. Wave Dragon

    DEFF Research Database (Denmark)

    Kramer, Morten; Frigaard, Peter

    På foranledning af Löwenmark F.R.I, er der udført numeriske beregninger af Wave Dragons (herefter WD) armes effektivitet for forskellige geometriske udformninger. 5 geometriske modeller, hvor WD's arme er forkortet/forlænget er undersøgt for 3 forskellige drejninger af armene. I alt er 15...

  9. 馆藏浮放文物地震滑移响应振动台试验%Slide Response of Museum Cultural Relics under Earthquake by Shaking Table Tests

    Institute of Scientific and Technical Information of China (English)

    周乾; 闫维明; 纪金豹

    2013-01-01

    To protect museum cultural relics,slide response of a museum free-standing cultural relic under earthquakes were studied by shaking table tests.Based on actual sizes of a museum showcase,its 1 ∶ 1 scale model was built whose bottom was fixed on the shaking table.A glass cultural relic was put in the showcase by free-standing mode.By inputting 3 different types of earthquake waves with 4 different intensities,curves of displacement,acceleration response and dynamic magnification coefficient of the relic were obtained; influence of friction coefficients were discussed ; theoretical analysis further proved reliability of tests.Results show that slide response of museum cultural relics is obviously affected by earthquake intensity as well as friction between itself and the display stand surface; big friction coefficient value is needed to mitigate slide response of relic,and sizes of the display stand surface have to be big enough for slide motion of relic.%为保护馆藏浮放文物,采用振动台试验方法,研究了浮放文物在地震作用下的滑移响应.基于某博物馆陈列柜的实际尺寸,制作了1∶1比例的模型.考虑陈列柜底部固定在振动台面上,并考虑在陈列柜内部浮放一玻璃文物,研究了模型在地震作用下的滑移响应.通过输入不同类型、不同强度的地震波,获得了文物典型节点的加速度、位移响应及动力放大系数,讨论了不同摩擦条件的影响,并在理论上对试验结果进行了分析.结果表明:随着地震波强度增大及文物与陈列台之间的摩擦系数减小,文物滑移响应趋于明显.因此,为减小文物的滑移震害,陈列台面与文物之间应有较大的摩擦系数,且对陈列台面最小尺寸应有一定的要求,以避免文物因过大滑移量而产生掉落.

  10. 河南省文物考古研究所建所五十周年回眸%Review of the 50 - year Course of the Henan Provincial Institute of Cultural Relics and Archaeology

    Institute of Scientific and Technical Information of China (English)

    孙新民

    2002-01-01

    Henan Provincial Institute of Cultural Relics and Archaeology, former Henan Provincial Cultural Relics Working Team, was established in June 1952 and the past 50 years saw the development of the Institute with hard work and great achievement. Now the Institute owns 10 research and administrative branches and 10 outposts all over Henan province with a total number of 105 researchers and administrators in the Institute. A large number of excavations and surveys have been carried out since 1952 and more than 60 archaeological reports, books and more than 1000 brief reports and papers have been published by the Institute and thus greatly improved the studies such as the origins of civilization, the Xia and Shang culture, ancient pottery and porcelain and metallurgy ect. of ancient China.

  11. Release the Dragon: The Role of Popular Culture in Children's Stories

    Science.gov (United States)

    Urbach, Jennifer; Eckhoff, Angela

    2012-01-01

    Young learners come to the school environment with myriad literacy experiences, some of which are inevitably based in popular culture. While literacy knowledge drawn from experiences with popular culture has traditionally been viewed as less important than academic literacy, educators wishing to create classrooms that value all children need to…

  12. Release the Dragon: The Role of Popular Culture in Children's Stories

    Science.gov (United States)

    Urbach, Jennifer; Eckhoff, Angela

    2012-01-01

    Young learners come to the school environment with myriad literacy experiences, some of which are inevitably based in popular culture. While literacy knowledge drawn from experiences with popular culture has traditionally been viewed as less important than academic literacy, educators wishing to create classrooms that value all children need to…

  13. From Cobra Grubs to Dragons: Negotiating the Politics of Representation in Cultural Research

    Directory of Open Access Journals (Sweden)

    Tanja Dreher

    2011-11-01

    Full Text Available ‘From cobra grubs to dragons’ was suggested as the title for a cultural tour of the Fairfield area in Sydney developed by the author and others through a partnership between the Centre for Cultural Research (CCR at the University of Western Sydney (UWS, the Fairfield City Council (FCC and the Migration Heritage Centre of the NSW government. The cultural researchers involved in producing the tour felt that this title was an evocative description of the tour which enables participants to visit numerous sites associated with Fairfield’s cultural diversity. As the project developed, a key funding partner vetoed that title, to be replaced by the prosaic ‘Tune in to Fairfield City: a multicultural driving tour’ which now appears on the audio CD and map which contain instructions for motorists to take the tour. This article analyses the rather more complex issues of naming and representation, voice and authority raised by this cultural research project.

  14. 酸雨对混凝土建筑物和文物损坏机理的研究%Acid Rain on the Damage Mechanism of Concrete Buildings and Cultural Relics

    Institute of Scientific and Technical Information of China (English)

    李灏阳; 李衍红

    2016-01-01

    Introduces the acid rain macro analysis of the mechanism of concrete damage of buildings and cultural relics , adding a small amount of gypsum, cement can delay setting time, but when adding quantity is big, will cause cement expansion, so that debacle, and acid rain on concrete structure and microscopic analysis of damage of cultural relics, such as acid rain are particularly to generate a variety of sulfate, through the analysis of the acid rain from the chemical reaction principle of sulfur diox-ide generated by reaction with calcium ions in the concrete mechanism of gypsum, acid rain are discussed from the gypsum charac-teristics of concrete buildings and cultural relics of the erosion mechanism, and thus puts forward the protection of concrete build-ings and cultural relics under the condition of acid rain .%介绍了酸雨对混凝土建筑物和文物损坏机理的宏观分析,水泥中加入少量石膏,可延缓凝结时间,但当加入量大,将引起水泥膨胀,以致溃裂,探讨了酸雨对混凝土建筑物与文物损坏的微观分析,特别是酸雨等生成各种硫酸盐,通过从化学反应原理上分析了酸雨中二氧化硫与混凝土中钙离子反应生成石膏机理,从石膏特性上探讨了酸雨对混凝土建筑物和文物侵蚀机制,并由此提出了酸雨条件下保护混凝土建筑物和文物应对措施。

  15. Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter; Knapp, W.

    2006-01-01

    Wave Dragon is a floating wave energy converter working by extracting energy principally by means of overtopping of waves into a reservoir. A 1:4.5 scale prototype has been sea tested for 20 months. This paper presents results from testing, experiences gained and developments made during...... this extended period. The prototype is highly instrumented. The overtopping characteristic and the power produced are presented here. This has enabled comparison between the prototype and earlier results from both laboratory model and computer simulation. This gives the optimal operating point and the expected...

  16. Dragon bridge - the world largest dragon-shaped (ARCH steel bridge as element of smart city

    Directory of Open Access Journals (Sweden)

    Chinh Luong Minh

    2016-01-01

    Full Text Available Dragon Bridge - The world’s largest dragon-shaped steel bridge, with an installation cost of $85 million USD, features 6 lanes for two separate directions, 666 meters of undulating steel in the shape of a dragon in the Ly Dynasty, the symbol of prosperity in Vietnamese culture. This unique and beautifully lit bridge, which also breathes fire and sprays water. It’s the purposeful integration of the lighting hardware articulates the dragon’s form, and the fire-breathing dragon head. This project transcends the notion of monumental bridge with dynamic colour-changing lighting, creating an iconic sculpture in the skyline that is both reverent and whimsical. The signature feature of the bridge was the massive undulating support structure resembling a dragon flying over the river. The dragon is prominent in Vietnamese culture as a symbol of power and nobility. Dragon Bridge stands out as a model of innovation. It has received worldwide attention in the design community and from the global media for its unique arch support system. Dragon Bridge serves as an example of how aesthetic quality of a design can serve cultural, economic and functional purposes. The article presents design solutions of the object and the evaluation of the technical condition before putting the facility into service.

  17. Dragon pavilion-I Have Come to See You in Kaifeng

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>The Dragon Pavilion Park is located at the northwestern corner down town in Kaifeng and is built on the ruins of the royal palace of six dynasties. Its main part is the big hall of dragon pavilion, one of the major protected relics in Henan Province. It comprises the following scenic spots: the Median Gate, the Bridge of Jade Belt, Songhu, the Worshipping Gate, the Screen Wall, the Worshipping House, and the Longevity Palace Architectural Compound built in the

  18. Development and utilization of underground space for the protection of relics in the Yang Emperor Mausoleum of the Han Dynasty

    Institute of Scientific and Technical Information of China (English)

    CHEN Zhilong; ZHANG Ping; LI Juxi

    2007-01-01

    By analyzing the ten burials that have been unearthed at the Yang Emperor Mausoleum of the Han Dynasty, and China's first wholly underground protection and exhibition hall of relics that is under construction, the article expounds the importance of relic site protection through underground space. In particular, it discusses the preservation of historical and cultural relics, the harmonious relationship between architecture and nature, and the collection and security of cultural relics.

  19. Isolation, Identification and Sequence Analysis of DNA-ITS of Mildew Species Sampled from Cultural Relics%文物上霉菌的分离及分子生物学鉴定

    Institute of Scientific and Technical Information of China (English)

    武望婷

    2012-01-01

    霉菌对人和文物都会产生危害,易使人感染到传染性疾病,对文物特别是有机质文物的影响尤为严重,使文物粘连腐烂分解,产生霉斑,影响文物品质。治病需先知因,为了使防霉工作做到有的放矢,需要对文物上的霉菌进行准确鉴定。本文从出土文物上采取水样、泥样,在实验室对其中含有的优势真菌进行分离及鉴定,通过菌落显微形态特征,培养特性,运用DNA-ITS和p—tubulin生物学方法等研究分析,最终确认7株霉菌菌株全部为青霉菌属,与已知菌的同源性均达到99%以上,分别为1.Penicillium polonicum,2.Penicillium rugulosum,3.Penicillium sp,4和7.Penicillium chrysogenum,5和6.Penicillium dipodomyicola。并且得出了这些霉菌的生长温度曲线,适宜生长温度范围为20℃-35℃,在条件允许下,可降低室内温度,用物理方法控制真菌的生长速度,为文物的保存和防霉提供了有力的科学依据。%Mould is harmful to cultural relics, especially those with organic materials. Therefore, mould identification is an important step in cultural relics protection. In the experiment introduced in this article, penicillium is isolated from water and soil sampled from cultural relics. Seven strains are obtained after subculture and purification. Based on morphology, culture characteristics and sequence analysis of DNA- ITS and [5-tubulin, the seven strains are identified as: 1. penicillium polonicum; 2. penicillium rugulosum; 3. penicillium sp., 4&7. penicillium chrysogenum, 5&6. penicillium dipodomyicola. At the same time, the temperature growth curves on the seven strains are gained, The above work may be helpful for cultural relics protection and mould prevention.

  20. Influence of Dragon Boat Sport Curriculum Setting up on College Campus Sports Culture%龙舟运动课程的开设对高校校园体育文化的影响研究

    Institute of Scientific and Technical Information of China (English)

    邵玉萍

    2014-01-01

    The dragon boat sport originated in China , it is a mass sports activities with strong ethnic characteristics with folk beliefs, and has a strong regional, mass and athletics.With the development of competitive sports, the dragon boat sport has become the Asian Games project successfully , the dragon boat sport is to develop for a long time, because its itself is the strong national characteristics and the spirit of solidarity , profound cultural connotation.This paper, through the literature review, logic analysis, expounds the origin of the dragon boat sport, discusses the intension of campus sports culture and education functions , expounds the opening of the dragon boat sport curriculum influence on campus sports culture .%龙舟运动起源于中国,是一项具有浓郁的民族特色的群众性体育活动带有民间信仰,具有很强的地域性、群众性和竞技性。随着竞技体育的发展,龙舟运动成功地成为了亚运会项目,龙舟运动之所以能够长久的发展下去,是因为其本身所具有的浓厚的民族特色和那种团结拼搏的精神,有着深厚的文化内涵。本文通过文献资料法、逻辑分析法阐述了龙舟运动的起源,探讨了校园体育文化的内涵及教育功能,阐述了龙舟运动课程的开设对校园体育文化的影响。

  1. 三维激光扫描技术在岩土文物保护中的应用%The application of 3 - D laser scanning to the conservation of stone cultural relics

    Institute of Scientific and Technical Information of China (English)

    吴育华; 王金华; 侯妙乐; 张玉敏

    2011-01-01

    Three - dimensional laser scanning is a new,advanced and rapidly developing technique in the fields of both surveying and information technology.It has played an important role in the conservation of cultural relics. This report summarizes the characteristics of three -dimensional laser scanning technology.With the aim of meeting requirements and to satisfy the demand for the conservation of stone cultural relics,some specific applications of the technique are introduced,especially information retention,virtual restoration and monitoring.Finally it is pointed out that in future application of the 3-D laser scanning to the field of relic conservation,there should he a focus on combining different applications;improvements of both hardware and software are also very important.%三维激光扫描是近年来飞跃发展的一项高新测绘与信息技术,在文物保护中发挥了重要作用介绍了三维激光扫描技术的主要特点,从岩土文物保护需求出发,结合实际文物保护工程,重点介绍了三维激光扫描技术在文物信息留存、虚拟修复、监测等方面的应用,最后指出三维扫描技术在岩土文物保护中的心用与发展须与保护需求紧密结合,而硬软件的改进完善及相关技术的集成心用亦是重要研究方向。

  2. Discussion of impact of relics activation on protection and utilization approaches-take the old summer palace as an example

    Science.gov (United States)

    Xiaoqi, J.

    2015-08-01

    As the popularization of cultural relics and the rapid development of cultural tourism industry, a large number of cultural relic tourism resources goes into public eyes. Activation of relics has became an important way for tourist to contact and understand culture relics. The way of how to properly interpret the historical sense and cultural uniqueness to the masses of tourists in order to achieve social service functions of relic resources has always been research focal point of site protection and utilization, so nowadays it has important significance to protection and utilization of heritage resources in our country. From the point of activation of relics and based on the analysis of resource characteristic, the paper in depth discuss ways of activation of relics of the Old Summer Palace, in order to provide reference for sustainable development of sites tourism in China.

  3. 龙舟精神与嘉兴城市文化建设的互动研究%The Interactive Research on Dragon Boat Spirit and Jiaxing City Cultural Construction

    Institute of Scientific and Technical Information of China (English)

    韩捷

    2012-01-01

    龙舟精神作为嘉兴端午民俗文化建设的一部分,在嘉兴城市文化建设中发挥了越来越重要的作用。随着嘉兴经济文化的发展,对非物质文化遗产的保护逐渐重视,龙舟精神作为嘉兴端午民俗文化的重要组成部分,其作用不容小觑。课题组通过实地调查和二手资料的查阅,采用SWOT(优势、劣势、机会、威胁)方法对嘉兴龙舟开展的现状进行了分析。主要阐述了龙舟精神在嘉兴城市建设中的地位、作用、价值体现,嘉兴城市文化建设对龙舟精神的影响,龙舟精神与嘉兴城市文化建设的协调发展三方面的内容,以求能为相关部门制定政策提供一定的借鉴作用。%Dragon boat spirit as part of the construction of Jiaxing festival Folk culture,has played more and more important role in Jiaxing city cultural construction.As Jiaxing economic and cultural developing,the protection of intangible cultural heritage is to be pay more attention,the dragon boat spirit as an important part of Jiaxing festival Folk culture,its role should not be underestimated.Inspection through surveys and secondary sources,the research group used the SWOT(strengths,weaknesses,opportunities,threats) method to analysis Jiaxing dragon boat's current developments.The paper mainly elaborated dragon boat spirit's status,role,value embodied in Jiaxing city construction,Jiaxing city cultural construction how to impact the dragon boat spirit,the dragon boat spirit and Jiaxing city construction coordinated development,and hope it will give good advice to the relevant departments.

  4. 全球华文教育视角下舞龙国际化发展的研究%The Study of the International Development of Dragon Dance from the Perspective of Global Chinese Language and Culture Education

    Institute of Scientific and Technical Information of China (English)

    肖洪波; 明华

    2014-01-01

    通过文献资料法、调查法、专家访谈法、逻辑分析法等研究方法就舞龙运动作为中华民族的特殊文化形象进行了介绍,分析了舞龙运动的发展现状,在全球华文教育视角下总结了其国际化发展过程中存在的问题,并提出了解决对策,阐明了舞龙国际化发展的重要意义,就如何在全球华文教育视角下推动舞龙国际化发展进行了深入的研究。%The thesis makes an introduction about dragon dance as Chinese national cultural image through the document litera -ture, investigation method , expert interviewing method , and logical analysis , and analyses the current development of dragon dance and concludes the existing problems in the process of international development from the perspective of global Chinese cul -ture and language education , as well as solutions .The thesis also explains the important international meaning of dragon dance and make a further research on how to improve the internationalization of dragon dance from the perspective of global Chinese cul -ture and language education .

  5. 唐代端午诗中的节俗文化及其蕴含的人文关照%Festival Culture and Humanistic Care in Poems of Dragon Boat Festival in Tang Dynasty

    Institute of Scientific and Technical Information of China (English)

    于巧

    2015-01-01

    The Dragon Boat Festival started in the Spring & Autumn period and the Warring States period. It had two thousand years history. The Tang Dynasty is a transitional phase in the development of the Dragon Boat Festival. There is a vivid description of Festival customs from the Dragon Boat poem,such as food,items and activities in Dragon Boat Festival. The perspective of this festival folk culture contains the rich humanistic care,including,treasure and blessing of life,the mourning and sing praises of Qu Yuan,and emotional communication between people.%端午节始于春秋战国时期,时至今日已有两千多年的历史。唐代是端午节发展过程中的一个过渡阶段,从唐代端午诗中我们可以看到唐人对端午节俗的生动描写,有端午饮食、端午节物以及端午社交活动,透视这些节俗文化可见其蕴含着的浓厚的人文关照,不仅有对生命的珍爱和祈愿,对屈原的悼念和歌颂,更有人们之间紧密的情感交流。

  6. Research on Protection Methods of Cultural Relics Based on Reverse Engineering%逆向工程技术在文物保护中的应用方法研究

    Institute of Scientific and Technical Information of China (English)

    吕俊

    2014-01-01

    Three dimensional laser scanning technique has been applied in three dimensional digital meas -urement and scanning of cultural relics which should be protected ,and the three dimensional digital infor-mation on the appearance could be reflected through surface reconstruction and entity reconstruction to es -tablish the three-dimensional CAD solid models .Meanwhile , the integrated modeling method including the forward modeling and the reverse modeling for cultural relics with different appearance is discussed .%应用三维激光扫描技术对文物进行三维数字测量或扫描,通过曲面重建和实体重构,建立三维CAD模型,可准确真实地获取反映文物外形的三维数字化信息。讨论了针对不同外形文物采取正向建模与逆向建模的联合建模方法。

  7. 党项史迹与陕北历史文化学术研讨会综述%A Summary of Seminar for Relics of the Dangxiang Nationality and Historical Culture in Northern Shaanxi

    Institute of Scientific and Technical Information of China (English)

    杨蕤

    2015-01-01

    2015年8月3日至5日,党项史迹与陕北历史文化学术研讨会在榆林市榆林学院区召开,来自全国各地的百余名代表出席本次研讨会,就党项史迹与陕北文化的相关问题进行了充分地交流和对话.从党项历史与陕北文化、陕北地区党项遗存调查与开发、党项及西夏研究中的其他问题三个方面对本次研讨会论文发表和学术观点进行综述.%Conference for relics of the Dangxiang nationality and historical culture in the north of Shaanxi Province was held in Yulin University from August 3rd to 5th,2015. More than 100 researchers came from all over the state and participated in the conference. opinions and papers involved are reviewed about topics such as relics of the Dangxiang nationality and historical culture in the north of Shaanxi province,investigation and development of Dan-gxiang remains,problems of Dangxiang and Xixia studies.

  8. Hadron Dragons strike again

    CERN Multimedia

    2009-01-01

    The CERN Dragon Boat team – the Hadron Dragons – achieved a fantastic result at the "Paddle for Cancer" Dragon Boat Festival at Lac de Joux on 6 September. CERN Hadron Dragons heading for the start line.Under blue skies and on a clear lake, the Hadron Dragons won 2nd place in a hard-fought final, following top times in the previous heats. In a close and dramatic race – neck-and-neck until the final 50 metres – the local Lac-de-Joux team managed to inch ahead at the last moment. The Hadron Dragons were delighted to take part in this festival. No one would turn down a day out in such a friendly and fun atmosphere, but the Dragons were also giving their support to cancer awareness and fund-raising in association with ESCA (English-Speaking Cancer Association of Geneva). Riding on their great success in recent competitions, the Hadron Dragons plan to enter the last Dragon Boat festival of 2009 in Annecy on 17-18 October. This will coincide with t...

  9. The rheology interpretation of destruction and establishment of dragon boat sport culture%龙舟运动文化“破与立”的流变阐释

    Institute of Scientific and Technical Information of China (English)

    陈明伟; 谢翔; 王艳琼; 苏奕敏

    2015-01-01

    Dragon boat sport culture is the sport culture phenomenon unique to Chinese nation. It plays an important role in maintaining the national feeling and inheriting the outstanding character of the Chinese nation for thousands of years.The dragon boat sport culture is the dragon totem worship derived from fear of the nature;it is the patriotism from the sublimation of hero;it is the sport spirit from the fusion of conflict and unity.Based on the conception of culture with four levels,this paper researches the modern rheology of dragon boat sport culture through the literature review and expert interview.This study shows that the modern dragon boat sport culture is the rheology from sacrificial culture to souvenir culture,from folk culture to sport culture,and also a rheology that inherits traditional culture yet gets rid of the traditional culture.It is beneficial to explore the intrinsic value of dragon boat sport culture well if grasping the process of trends evidently in different culture layer and to provide new thoughts for modern dragon boat career.%龙舟运动文化是中华民族独有的体育文化现象,千百年来在维系民族情感和传承中华民族优秀品格的过程中发挥了极为重要的作用。龙舟运动文化是对自然的敬畏衍生出的龙图腾崇拜;是对英雄的礼赞升华而来的爱国情怀;是对立与统一相融合的体育精神。本研究从“文化四层次理论”出发,运用文献资料、访谈等研究方法对龙舟运动文化的现代流变进行探析,结果表明:现代龙舟运动文化是祭祀文化向纪念文化的流变,是民俗文化向体育文化的流变,是一场延续传统却又摆脱传统的流变。从不同层面具体而清晰地把握龙舟运动文化的现代流变过程有利于我们更好地发掘龙舟运动文化的内涵价值,给现代龙舟运动的发展提供新的发展思路。

  10. Development of ancestors' cultivation revealed in phytolith assemblages from Guangfulin relics

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    Shanghai Museum has got great achievements in re-excavating Guangfulin relics. It is the first time that the cultural remains of Wangyoufang type is found above the Liangzhu cultural remains which comes from East Henan Province, providing previous materials for researching culture evolution around Taihu Lake. Samples were taken from the immature soil layer and cultural layers of Guangfulin relics for phytolith analysis. According to the systemic research for the archaeological remains and phytolith fossil, the phytoliths in Guangfulin relics can be divided into four zones. The development of rice agriculture and living condition of Guangfulin ancestors was discussed based on the existing rice fan-shaped phytolith, rice shell phytolith, diatom fossil and archaeology evidence in the same layer. The Guangfulin relics has gradually developed since a high sea level 5000 years ago, and the broad rice agriculture has simultaneously developed. The newly re-excavated relics provides valuable materials for the research of ancestors and ancient culture in Shanghai.

  11. Plaster-Wrap Dragons

    Science.gov (United States)

    Vance, Shelly

    2012-01-01

    In this article, the author describes how her students constructed a three-dimensional sculpture of a dragon using plaster wrap and other materials. The dragons were formed from modest means--using only a toilet-paper tube, newsprint, tape and wire.

  12. Plaster-Wrap Dragons

    Science.gov (United States)

    Vance, Shelly

    2012-01-01

    In this article, the author describes how her students constructed a three-dimensional sculpture of a dragon using plaster wrap and other materials. The dragons were formed from modest means--using only a toilet-paper tube, newsprint, tape and wire.

  13. 多种无损检测技术在文物保护中的综合应用研究%Comprehensive Application Research of Nondestructive Testing Technology in Preservation of Cultural Relics

    Institute of Scientific and Technical Information of China (English)

    穆保岗; 别倩; 刘东华; 周菊萍

    2012-01-01

    As the only world cultural heritage in Nanjing, Ming tomb must be have a great attention on conservation. Ming House always suffers rainwater corrosion which threatens the safety of cultural relic. It is necessary to recover the superstructure of Ming House to protect it. Firstly, the compaction rate of ground and inside of remaining wall is need to affirm. In view of the particularity of cultural relics, nondestructive testing and micro damage detection such as ground penetrating radar, electromagnetic wave CT was used to contrastive analysis. It is discovered that the material is uniform and there is no cavern inside the construction . It is fit to suffer the additional load of additional top basically, which provides the scientific basis for adding top on Ming House successfully.%明孝陵作为南京市目前唯一的世界文化遗产,其文物保护地位非常重要.明楼常年受到雨水流蚀破坏,威胁文物安全,需采用恢复明楼上部结构对其进行保护.针对此问题首先需要对明楼的地面及残存墙体内部的密实程度进行确认,因此鉴于明楼文物的特殊性,本文通过探地雷达、电磁波层析成像技术等多种无损或微损检测方法进行对比分析,判断明楼结构内部材质均匀、无孔洞发育,基本适合承受加顶的附加荷载,为明楼加顶保护顺利实施提供了科学的依据.

  14. Cultural Connotation and Artic Presentation in Symbols of Dragons and Phoenixes%龙凤图形符号的文化意蕴与艺术表现

    Institute of Scientific and Technical Information of China (English)

    陆晓云

    2012-01-01

    龙凤文化流传广泛久远。龙凤图形符号充满着神秘的色彩和浓郁的民族气息,具有图形和符号的双重属性。龙和凤的结合辉映,不仅是中国人表达审美意识和界定不同文化群体的图式语言,还是寄托精神信仰的符号载体。龙凤图形符号具有民族图腾崇拜、权力地位象征、爱情婚姻祝福、喜庆吉祥寓意、寻根认同心理等特定的精神语义。经历了漫长的演变和发展过程,对龙凤的喜爱与崇拜现象广泛存在于中国社会各个阶层和各个历史发展时期,艺术家不断丰富变化龙凤的符号样式,并赋予其不同的语义,这些为中国本土化设计积淀了丰厚的文化土壤。%The symbols of dragons and phoenixes have a long history, and they are ot mysterious elements ana proiouna national features. The combination of dragons and phoenixes is the schematic presentation of the aesthetic awareness and different cultures of Chinese, and is the symbolic carrier of Chinese beliefs. This combination is of significances, such as totemism, power, position, love, marriage, auspiciousness, luck and so on. After a long time of evolution and development, the fondness and worship of this symbol take wide coverage in all walks of life in the history. Artists have enriched this symbol with different connotations, all of which have provided a profound cultural atmosphere for the local design of China.

  15. Relics: penguin population programs.

    Science.gov (United States)

    Sun, L; Xie, Z

    2001-01-01

    What has been responsible for the increase in Chinstrap penguin populations during the past 40 years in maritime Antarctica? One view ascribes it to an increase in availability of their prey brought on by the decrease in baleen whale stocks. The contrary opinion, attributes it to environmental warming. This causes a gradual decrease in the frequency of cold years with extensive winter sea ice cover. A number of penguin monitoring programs are in progress and are expected to provide some answers to these questions. Unfortunately, it is not easy to distinguish natural variability from anthropogenic change since penguins are easily accessible predators of krill and the feeding range of the penguins has almost overlapped with the krill fishery in time and space in the last four decades. Therefore it is important to reconstruct the change of ancient penguin abundance and distribution in the absence of human activity. Many efforts have focused on surveying the abandoned penguin rookeries, but this method has not been able to give a continuous historical record of penguin populations. In several recent studies, ancient penguin excreta was scooped from the penguin relics in the sediments of the lake on penguin rookery, Ardley Island, maritime Antarctica. In these studies, penguin droppings or guano soil deposited in the lake and changes in sediment geochemistry have been used to calculate penguin population changes based upon the geochemical composition of the sediment core. The results suggest that climate change has a significant impact on penguin populations.

  16. Radio Relics in Cosmological Simulations

    Indian Academy of Sciences (India)

    M. Hoeft; S. E. Nuza; S. Gottlöber; R. J. van Weeren; H. J. A. Röttgering; M. Brüggen

    2011-12-01

    Radio relics have been discovered in many galaxy clusters. They are believed to trace shock fronts induced by cluster mergers. Cosmological simulations allow us to study merger shocks in detail since the intra-cluster medium is heated by shock dissipation. Using high resolution cosmological simulations, identifying shock fronts and applying a parametric model for the radio emission allows us to simulate the formation of radio relics. We analyze a simulated shock front in detail. We find a rather broad Mach number distribution. The Mach number affects strongly the number density of relativistic electrons in the downstream area, hence, the radio luminosity varies significantly across the shock surface. The abundance of radio relics can be modeled with the help of the radio power probability distribution which aims at predicting radio relic number counts. Since the actual electron acceleration efficiency is not known, predictions for the number counts need to be normalized by the observed number of radio relics. For the characteristics of upcoming low frequency surveys we find that about thousand relics are awaiting discovery.

  17. 环鄱阳湖地区原生态舞龙文化的特点探析%Analysis of the Features of the Original Eco-cultural Dragon Dancing in the Regions Surrounding Poyang Lake

    Institute of Scientific and Technical Information of China (English)

    王俊奇

    2011-01-01

    This paper adopts literatures and logics to make a study on the cultural features of eco-dragon dancing in the regions surrounding Poyang Lake.It concludes that the faith and worship are present in all aspects of it,so are the inhabitants' faith and sincerity in lives.It is performed by emulating all kinds of animals which they worship and diverse in forms,such as jumping dragon and straw dragon,which they perform on the sunning ground or on the path of the rice fields for the purpose of praying for the good harvest.This kind of dragon dancing,full of humanity,is not skill showing,but rather the epitome of the farming culture which exists for hundreds of years.%采用文献法,逻辑学方法,对环鄱阳湖地区原生态舞龙的文化特点进行研究。分析认为:鄱阳湖地区的舞龙处处体现着信仰和崇拜,体现着一方人民对生活的真诚和感动。环鄱阳湖舞龙多种动物样态,反映的是各种崇拜。他们有的在晒谷场舞跳脚龙,有的在田埂上狂舞草龙,都是祈求五谷丰登,这种充满人性的舞龙不同于一般单纯炫技,而是千百年农耕文化的缩影。

  18. Stable superstring relics

    Energy Technology Data Exchange (ETDEWEB)

    Chang, S.; Coriano, C. [Florida Univ., Gainesville, FL (United States). Inst. for Fundamental Theory; Faraggi, A.E. [Florida Univ., Gainesville, FL (United States). Inst. for Fundamental Theory]|[Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences

    1996-05-15

    The authors investigate the cosmological constraints on exotic stable matter states which arise in realistic free fermionic superstring models. These states appear in the superstring models due to a ``Wilson-line`` breaking of the unifying non-Abelian gauge symmetry. In the models that they consider the unifying SO(10) gauge symmetry is broken at the string level to SO(6) x SO(4), SU(5) x U(1) or SU(3) x SU(2) x U(1). The exotic matter states are classified according to the patterns of the SO(10) symmetry breaking. In SO(6) x XO(4) and SU(5) x U(1) type models one obtains fractionally charged states with Q{sub e.m.} = {+-}1/2. In SU(3) x SU(2) x U(1) type models one also obtains states with the regular charges under the Standard Model gauge group but with ``fractional`` charges under the U(1){sub z{prime}} symmetry. These states include down-like color triplets and electroweak doublets, as well as states which are Standard Model singlets. By analyzing the renormalizable and nonrenormalizable terms of the superpotential in a specific superstring model, the authors show that these exotic states can be stable. They investigate the cosmological constraints on the masses and relic density of the exotic states. They propose that, while the abundance and the masses of the fractionally charged states are highly constrained, the Standard Model-like states, and in particular the Standard Model singlet, are good dark matter candidates.

  19. Nondestructive analysis of section structure of common ceramic cultural relics based on OCT imaging technology%基于OCT成像技术对常见陶瓷文物断面结构的无损分析

    Institute of Scientific and Technical Information of China (English)

    董俊卿; 李青会; 严鑫

    2015-01-01

    采用光学相干层析(OCT)成像技术对河南和安徽出土的新石器时代至宋代的几种陶瓷质文物(彩陶、漆绘陶、唐三彩、绞胎釉陶、青瓷和钧瓷)的断面结构进行无损分析,获取了不同类别陶瓷器的表层(颜料层、底漆层和釉层)、中间层、胎釉结合面以及胎体表面的断面结构图像特征。通过这些结构图像,探讨了不同陶瓷器的制作工艺特点,同时也讨论了OCT成像技术分析不同类别陶瓷文物的断面结构的优点和局限。%Utilizing the optical coherence tomography (OCT) imaging technology, we nondestructively analyzed the section structure of some ceramic cultural relics (such as colored pottery, lacquer painted pottery, tri-colored glazed pottery of the Tang Dynasty, glazed pottery with twisted body, celadon and Jun porcelain) unearthed from Henan and Anhui provinces and dated from Neolithic Period to the Western Han Dynasty. We obtained the section structure imaging characteristics of the surface (the layers of pigment, lacquer and glaze), the middle layer, the glaze/body boundaries and the body of the different type ceramic objects. The production process characteristics of the different ceramic antiquities were discussed based on the characteristics. In addition, we also discussed the advantages and limitations of the OCT imaging technology in analyzing the section structure of diverse ceramic culture relics.

  20. Bitten by a Dragon.

    Science.gov (United States)

    Ducey, Stephen D; Cooper, Jeffrey S; Wadman, Michael C

    2016-06-01

    Komodo dragons (Varanus komodoensis) are large lizards known to take down prey even larger than themselves. They rarely attack humans. A 38-year-old woman was bitten by a Komodo dragon on her hand while cleaning its enclosure. She was transiently hypotensive. The wounds were extensively cleaned, and she was started on prophylactic antibiotics. Her wounds healed without any infectious sequelae. Komodo dragon bites are historically thought to be highly infectious and venomous. Based on a literature review, neither of these are likely true. As in any bite, initial stabilization followed by wound management are the main components to therapy.

  1. Relic galaxies: where are they?

    Science.gov (United States)

    Peralta de Arriba, P.; Quilis, V.; Trujillo, I.; Cebrián, M.; Balcells, M.

    2017-03-01

    The finding that massive galaxies grow with cosmic time fired the starting gun for the search of objects which could have survived up to the present day without suffering substantial changes (neither in their structures, neither in their stellar populations). Nevertheless, and despite the community efforts, up to now only one firm candidate to be considered one of these relics is known: NGC 1277. Curiously, this galaxy is located at the centre of one of the most rich near galaxy clusters: Perseus. Is its location a matter of chance? Should relic hunters focus their search on galaxy clusters? In order to reply this question, we have performed a simultaneous and analogous analysis using simulations (Millennium I-WMAP7) and observations (New York University Value-Added Galaxy Catalogue). Our results in both frameworks agree: it is more probable to find relics in high density environments.

  2. 北京城中轴线申遗与文物保护%The Application for the Membership of the World Cultural Heritage and the Cultural Relic Protection of Beijing City's Axis

    Institute of Scientific and Technical Information of China (English)

    李建平

    2011-01-01

    "线性遗产"是世界文化遗产关注的新领域。所谓"线性"就是文化遗产或景观呈现"线路"形式或形态。"线性遗产"也包括三种形态:线性历史文化遗产、线性自然景观遗产、线性自然和人文景观融合的遗产。应该说,这三种遗产北京都有,其中最突出最引人注目的是北京城中轴线。北京城中轴线南起永定门,北止钟楼,全长7.86公里,是北京城呈现线路最长、文物景观最多的线性历史文化遗产。这条城市中轴线规划设计和营建开始于元大都城,历经元、明、清、民国直至中华人民共和国,有将近千年的历史,凝聚了北京城市文化发展的精髓,是北京城最壮美的进行曲,是关乎北京人文、政治、道德、教化、建筑的智慧线,是北京城从古代奔向未来的生命线,保护好中轴线,就是保护好北京城。%The Linear Legacy is a new field that recently focused by the World Cultural Heritage.This so-called 'linear' is the form presented by a certain cultural legacy or view,which becomes the combination of the nature and human-architected based legacy.There is one thing to clarify is that Beijing is the city that owns the entire three characteristics,especially the most spectacular Beijing City's Axis.The Beijing City's Axis starts from Yong Ding Gate and reaches the Bell Tower to the north of the city,with a length of 7.86 kilometers which is the longest legacy line of all.As well,along its way,it holds the most historic legacy in the aspect of cultural relics and views.The design and establishment began since the time of building Yuan Dadu City,covering the time of Yuan,Ming,Qing Dynasty,and from Min Guo to the foundation of the People's Republic of China,which has a history of thousands of years and has assembled the most treasonable wisdom of the development of Beijing.It is the most brilliant song in its progress,which is the wits line that formed with the center

  3. Culture or Relics?:On the Dilemma of "Relic-thinking" in Intangible Culture Heritage Protection%文化?文物?——简论文化遗产保护中的“文物化”困境

    Institute of Scientific and Technical Information of China (English)

    张小军; 张晓松

    2011-01-01

    探讨了当前非物质文化遗产保护中的”文物化”困境,即”有文物,没文化”的状况,指出了新颁布的《中华人民共和国非物质文化遗产法》也存在着忽视文化母体保护的现象,通过笔者提出的非物质文化遗产保护中四项基本原则的讨论,强调了在法律的”盲区”之外,尚有着保护民族文化生态的一些基本天理、伦理和道理,希望得到全社会的尊重。%This present study explores the dilemma of "relic-thinking" in intangible culture heritage protection, the situation of "relics with no culture". It is also pointed out that cultural matrix protection is neglected even in The People's Republic of China Intangible Culture Heritage Law. This research insists the discussion of 4 basic principles for intangible culture heritage protection, emphasizeing basic ethics in protecting ethnic culture ecology, which deserves respect from the whole society.

  4. Aging Mechanism of Quicklime and Application Study of Aged Lime in Conservation of Cultural Relics%石灰陈化机理及其在文物保护中的应用研究

    Institute of Scientific and Technical Information of China (English)

    魏国锋; 张秉坚; 方世强

    2012-01-01

    Aging mechanism of quicklime and application of aged lime in conservation of cultural relics were studied by means of scanning electron microscope(SEM)and X-ray diffractometry. Results show that calcium hydroxide crystals undergo both substantial size reduction and clear morphological change to form acicular Ca(OH)2(50 nm in diameter and 200 nm in length)and plate-like Ca(OH)2(100 -200 nm in size)crys-tals in the course of aging. Meanwhile, research results indicate that the nano size and high reactivity of aged lime particles prompt the improvement of the mechanical properties of sticky rice-lime mortar and hydraulic conductivity of Ca(OH)2-alcohol dispersions, which solves the problems of low dissolution and permeability associated with the use of Ca(OH)2 solutions. This study is expected to found the stone for application of aged lime in conservation of cultural relics.%采用SEM和XRD等技术手段,探讨了石灰陈化过程机理及其在文物保护中应用的可行性.结果表明,石灰在陈化过程中,随着陈化时间的增加,氢氧化钙的粒径呈现逐渐减小的趋势,形成了直径约50 nm、长度约200 nm的针状氢氧化钙,以及粒径为100~200 nm的板状氢氧化钙;陈化石灰的纳米粒径和高反应活性较好地改善了陈化石灰糯米灰浆的抗压强度、表面硬度等物理性能,并使陈化石灰-乙醇分散液具有良好的渗透性,可较好地解决传统石灰水加固剂溶解度较小和渗透性较差的问题,为其在砖、石、土质文物保护中的应用奠定科学基础.

  5. Cultural Characteristics of Costumes for Competitive Dragon Dancing in China%我国现代竞技舞龙运动服饰文化特征研究

    Institute of Scientific and Technical Information of China (English)

    李志军; 张赐东

    2014-01-01

    As a product and carrier of culture, costume is an integration of substance and spiritual aspects of mankind. The costume in the modern competitive dragon dancing in China is the cultural integration of substance culture, system culture and spiritual culture, which is filled with rich cultural atmosphere and such cultural characteristics as change, heritage, nationality, compatibility and aesthetics. The costume for modern competitive dragon dancing is not only rich in historical and cultural traces, but shows the modern fashion and artistic expressive force.%服饰是文化的产物和载体,现代竞技舞龙运动服饰充满了浓郁的文化气息,具有嬗变性、传承性、民族性、兼容性、审美性等文化特征。其嬗变性反映了时代文化的形态,传承性体现了历史文化的积淀,民族性展示了文化的多样性,兼容性促进了历史与现代的文化交融,审美性则展现了美的文化依附物。现代竞技舞龙运动服饰不仅富有厚重的历史文化痕迹,而且展现了时尚的现代感和艺术表现力。

  6. Nuclear astrophysics at DRAGON

    Energy Technology Data Exchange (ETDEWEB)

    Hager, U. [Colorado School of Mines, Golden, Colorado (United States)

    2014-05-02

    The DRAGON recoil separator is located at the ISAC facility at TRIUMF, Vancouver. It is designed to measure radiative alpha and proton capture reactions of astrophysical importance. Over the last years, the DRAGON collaboration has measured several reactions using both radioactive and high-intensity stable beams. For example, the 160(a, g) cross section was recently measured. The reaction plays a role in steady-state helium burning in massive stars, where it follows the 12C(a, g) reaction. At astrophysically relevant energies, the reaction proceeds exclusively via direct capture, resulting in a low rate. In this measurement, the unique capabilities of DRAGON enabled determination not only of the total reaction rates, but also of decay branching ratios. In addition, results from other recent measurements will be presented.

  7. The Wave Dragon

    DEFF Research Database (Denmark)

    Sørensen, H. C.; Hansen, R.; Friis-Madsen, E.

    2000-01-01

    The Wave Dragon is an offshore wave energy converter of the overtopping type, utilizing a patented wave reflector design to focus the waves towards a ramp, and the overtopping is used for electricity production through a set of Kaplan/propeller hydro turbines. During the last 2 years, excessive...... design an testing has been performed on a scale 1:50 model of the Wave Dragon, and on a scale 1:3:5 model turbine. Thus survivability, overtopping, hydraulic response, turbine performance and feasibility have been verified....

  8. Cultural Meaning of "Eagle""Dragon"in The Zhi Ge A-Long%探析《支格阿龙》中“鹰”“龙”的文化寓意

    Institute of Scientific and Technical Information of China (English)

    孙子呷呷; 阿育几坡

    2014-01-01

    毋庸讳言,从生命科学角度讲,因为染色体的原因,“神人”支格阿龙不可能由“鹰或神鹰或神龙鹰”感孕而生;人也不可能由“龙”抚育成长。目前,彝族英雄史诗《支格阿龙》在翻译成汉语时或彝族后代在传承过程中,都把文本中的“dit氐”翻译或解释为“雕或鹰”,这种解读有些偏差。史诗中让濮莫妮依感孕的“鹰”和哺育支格阿龙成长的“龙”分别象征什么?它要向后人表达的是一种怎样的文化寓意?本文从生命科学角度窥探《支格阿龙》,提出“鹰”是男根的象征,“龙”与汉文化相通,是男人的图腾物之观点。以求文献得到更好的保护、传承和解读。%Needless to say, from the viewpoint of life science, because of the chromosome, "god" Zhi Ge A-Long can be impossible gestated by"eagle or condor or dragon eagle";people can not be raised by"dragon". At present, with the Yi heroic epic The Zhi Ge A-Long translated into Chinese or in the transmission process of Yi offspring ,"dit"in the text has been translated or explainted for"eagle or hawk", which understanding isn’t right completely. What do the"eagle"who got PuMonii pregnant and the"dragon"who fostered Zhi Ge A-Long growth symbolize? What cultural meaning does it express to the descendants? From the perspective of life science ,the paper puts forward the"Eagle"is the symbol of male root and"dragon"interlinked Chinese cultures is the totem of man in order to make literature better protection, inheritance and interpretation.

  9. The Goodness of Harmony:New Changes and Reconstructions of the Dragon Boat Festival Culture in Song Dynasty.%和谐之美:宋代端午节庆文化的新变与再建构

    Institute of Scientific and Technical Information of China (English)

    李懿

    2012-01-01

    The Dragon Boat Festival in Song Dynasty is of unique significance in the synchronic and diachronic system of festivals.The whole passage aims to analyze the various festival names briefly to present specific changes in Song Dynasty which was in pursuit of the goodness of harmony in The Dragon Boat Festival Culture,based on the influential factors in the development of economy,population,the popularity of Taoism,advocating the ruler,communication among nations,and so on.Lastly,it explains the influence of folk-custom and literature of The Dragon Boat Festival in Song Dynasty to the next generations.According to restoring of the specific historic and social environment and settling the documents,the author tries presenting various and colorful life and festival concept.%宋代端午节在共时、历时的节日体系中占有至关重要的地位。文章主要对端午多样化的节名作简要辨析,并从宋代社会的经济发展、市民壮大、道教风行、统治者的提倡、民族交流等影响性因素入手,呈现端午节在宋代的具体变化,揭示宋人竭力追求的端午节庆文化的和谐之美。最后,就宋代端午民俗与文学的互动及对后世的影响作说明。试图通过特定历史社会环境的还原与文献梳理,立体再现宋人丰富多彩的节序生活和节日理念。

  10. Cultural Industry Chain Mode to Protect and Develop the Revolutionary and Historical Relics%革命历史文物保护与发展的文化产业链模式——以焦裕禄纪念园为个案

    Institute of Scientific and Technical Information of China (English)

    张艳蕊

    2012-01-01

    革命历史文物的保护与发展长期以来一直固守着公益性的单项模式,资金的匮乏以及相关产业链的薄弱导致其修缮养护的不力,也直接弱化了其教育意义。以文化产业链模式构建焦裕禄纪念园由中心辐射、旅游线路经纬线交织、相关产业纵深丰富的产业发展模式,当不失为革命历史文物乃至传统历史文化古迹发展的有益尝试。%The protection and development of revolutionary and historical relics has long been sticking to the single mode of seeking public welfare. Lack of money and the weakness in relevant industry chain also lead to inef- fective repair and maintenance and thus weaken its educational significance. Jiao Yu-lu memorial can be set up in the mode of cultural industry chain, consisting of the radiation of the memorial center, interweave of longitude and latitude tour routes, and relevant businesses with profound development. This attempt of industry development mode is beneficial for developing revolutionary and cultural relics,or even traditional relics in history and culture.

  11. 文物展示空间的信息传达--文物的展示互动教育相结合%INFORMATION EXPRESSION OF CULTURAL RELICS EXHIBITION SPACE--culTural relics exhibiTion inTeracTive educaTion

    Institute of Scientific and Technical Information of China (English)

    郭绍义; 滕越

    2015-01-01

    现代博物馆随着时间的变化以及教育模式的发展,展示教育的模式也开始趋向互动沟通模式,将观众化作主动群体。将自己身份定义为观众,以观众的独特视角来到博物馆展,观众作为信息的接受者主体,同时也作为被教育者,时刻感受博物馆的教育服务。经过对比,发现在一些科技类自然类博物馆中会有一些有趣的互动,很是吸引观众的兴趣。但是在一些历史博物馆中,特别是文物展示中,展示的手法就比较单一枯燥,相比之下,信息传播的功能就弱了一些。我在参观博物馆藏品的同时,更被激发了无限的想象空间和求知欲望。%As time changes modern museum develops with the education mode. Education mode also began to tend to be the interactive communication mode, and the audience wil turn into active groups. According to audience's unique view, the audience is as the main information receiver, and at the same time they are also as the educator, feeling the museums` change. After comparison, in some tech museum of natural class, there are some interesting interaction which attracts the audience's interest. But in some of the history museums, especialy cultural relics on display, display technique is boring. By contrast, the function of information communication is weak. When visiting the museum, the audiences are inspired.

  12. The racing dragon

    CERN Document Server

    2009-01-01

    Dating back nearly 2000 years, the ancient Chinese tradition of Dragon Boat Racing was originally a celebration that fell on the 5th day of the 5th lunar month as a gesture to please the Gods and bring forth necessary rains to cultivate the lands. Now the CERN Canoe and Kayak Club, too, participates in this tradition, though not so much to please the Gods on the ritualistic date, but to bring forth giant smiles on the faces of members. Dragon Boat Racing has been rising steadily in popularity in Europe since the mid nineties and with the great potential to host and promote Dragon Boat Racing in the Geneva area, the CERN Canoe and Kayak Club, has taken the initiative to bring the sport to the region. Some members of the Club traveled to Dole in June to participate in the Festival Dragon Boat 2009. Under perfect sunny conditions, the team triumphed in their first ever tournament, cruising to a convincing first place overall finish. T...

  13. Dragon Boat Festival.

    Science.gov (United States)

    Lew, Gordon

    This is one of a series of elementary readers written in Cantonese and English and designed to familiarize children with the traditional major Chinese festivals celebrated by the Chinese in America. This booklet describes the celebration of the Dragon Boat Festival, which marks the beginning of summer. A brief background to the festival is…

  14. Wave Dragon MW

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter

    Wave Dragon is a wave energy converter of the overtopping type. The device has been thoroughly tested on a 1:51.8 scale model in wave laboratories and a 1:4.5 scale model deployed in Nissum Bredning, a large inland waterway in Denmark. Based on the experience gained a full scale, multi MW prototype...

  15. Wave Dragon MW

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter

    Wave Dragon is a wave energy converter of the overtopping type. The device has been thoroughly tested on a 1:51.8 scale model in wave laboratories and a 1:4.5 scale model deployed in Nissum Bredning, a large inland waterway in Denmark. Based on the experience gained a full scale, multi MW prototype...

  16. 端午民俗视角下龙舟竞渡文化发展研究--以温州地区为例%A research on the dragon boats racing cultural development under the folkways--take Wenzhou region for a instance

    Institute of Scientific and Technical Information of China (English)

    孙永梅

    2015-01-01

    龙舟竞渡是端午节的传统项目,尤其在以“江南水乡”著称的温州,由于受早期吴越文化和“以船为车”生活方式等的影响,在数千年的历史进程中,培育了丰富的龙舟竞渡文化。本文在梳理温州龙舟竞渡发展历程的基础上,总结其自身文化特色;分析发展中的制约因素,并提出相应的发展策略。%The dragon boat race is traditional project in Dragon Boat Festival,which is especially famous in wenzhou for its“jiangnan watertown”,due to the early Wu Yue culture and“ship as car”lifestyle. In the process of thousands of years of history and culture has abundant dragon boat racing culture. This paper,on the basis of the development of Wenzhou dragon boat race,summarizes its own cultural characteristics,analyzes the development of constraints,and puts forward the corresponding development strategy.

  17. Intraerythrocytic iridovirus in central bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Grosset, Claire; Wellehan, James F X; Owens, Sean D; McGraw, Sabrina; Gaffney, Patricia M; Foley, Janet; Childress, April L; Yun, Susan; Malm, Kirsten; Groff, Joseph M; Paul-Murphy, Joanne; Weber, E Scott

    2014-05-01

    Three adult central bearded dragons (Pogona vitticeps) originating from a commercial breeding facility presented with clinical signs, including anorexia, dehydration, white multifocal lesions on the dorsal aspect of the tongue, blepharospasm, and weight loss. In 1 of 3 lizards, a marked regenerative anemia was noted, and all 3 bearded dragons had erythrocytic intracytoplasmic inclusion bodies. Nine bearded dragons housed in contact also had identical, but fewer intraerythrocytic inclusions. Inclusion bodies examined by electron microscopy had particles consistent with iridoviruses. Attempts to culture the virus were unsuccessful; however, amplification and sequencing of regions of the viral DNA polymerase by polymerase chain reaction confirmed the presence of an iridovirus. One of the bearded dragons died, while the 2 others showing clinical signs were euthanized. The remaining 9 infected bearded dragons of the teaching colony were also euthanized. Postmortem examination revealed a moderate, multifocal, lymphoplasmacytic or mononuclear adenitis of the tongue in the 3 bearded dragons, and a lymphohistiocytic hepatitis with bacterial granulomas in 2 lizards. © 2014 The Author(s).

  18. Hair, Death, and Memory: The Making of an American Relic

    Directory of Open Access Journals (Sweden)

    Abigail Heiniger

    2015-08-01

    Full Text Available This article traces the transformation of hairworks in America during the mid-nineteenth-century. Harriet Beecher Stowe’s novel Uncle Tom’s Cabin transformed the meaning of hair and hairworks in the American cultural imaginary by endowing Little Evangeline St. Clare’s hair with sacred, moralizing power. Likewise, after the Emancipation Proclamation was issued in 1863, President Abraham Lincoln’s hair achieved nationwide, relic-like significance. The Abraham Lincoln Papers contains six hair requests; these letters demonstrate that the cultural meaning of Lincoln’s hair resembles the fictional power of Eva’s hair in Stowe’s novel. Analyzing this phenomena of relic-like hair modifies our understanding of the unprecedented sentimental reaction to Lincoln’s assassination and particularly the fascination with seeing and approaching the president’s body.

  19. Dragon's blood: botany, chemistry and therapeutic uses.

    Science.gov (United States)

    Gupta, Deepika; Bleakley, Bruce; Gupta, Rajinder K

    2008-02-12

    Dragon's blood is one of the renowned traditional medicines used in different cultures of world. It has got several therapeutic uses: haemostatic, antidiarrhetic, antiulcer, antimicrobial, antiviral, wound healing, antitumor, anti-inflammatory, antioxidant, etc. Besides these medicinal applications, it is used as a coloring material, varnish and also has got applications in folk magic. These red saps and resins are derived from a number of disparate taxa. Despite its wide uses, little research has been done to know about its true source, quality control and clinical applications. In this review, we have tried to overview different sources of Dragon's blood, its source wise chemical constituents and therapeutic uses. As well as, a little attempt has been done to review the techniques used for its quality control and safety.

  20. Analysis on Science Research Present Situation of Municipal Museums of Shanxi Cultural Relics and Museum System%山西文博系统市级博物馆学术研究现状探析

    Institute of Scientific and Technical Information of China (English)

    郭智勇

    2015-01-01

    学术研究是博物馆其他业务工作的重要基础,其成果最终通过陈列展览输出给公众,成为搭建于文物和公众之间的一座桥梁。近年来,山西文博系统各市级博物馆充分利用文物优势,广泛开展学术研究与交流,取得可喜成果,但也存在些许不足。本文通过探究博物馆科学研究中存在的问题,并给予对策分析。结果表明,人才培养、科研规划、团队建设、图书资料配备等是提高科研水平的重要条件和保障。%Scientific research is an important foundation of the museum among other business work, the results finally through the exhibition on display outputs to the public,and serves as a bridge between heritage and public . In recent years, Municipal Muse⁃ums of Shanxi Cultural Relics and Museum System make full use of advantages, carry out a wide range of academic research and ex⁃change, and make gratifying achievements, but there are also some problems. In this paper, by exploring the existence of of science re⁃search problems about the Museum, the author give the countermeasure analysis. The article thinks the talent training, the scientif⁃ic planning, the team building and the library materials equipment is an important condition andguarantee to improve the level of scien⁃tific research.

  1. RELICS: Reionization Lensing Cluster Survey

    Science.gov (United States)

    Coe, Dan A.; RELICS Team

    2017-01-01

    Hubble and Spitzer imaging programs observing galaxy cluster lenses have delivered some of the highest redshift galaxy candidates to date (z ~ 9 - 11, or 540 - 410 Myr after the Big Bang). These magnified galaxies are intrinsically faint, and thus more representative of the sources believed to be primarily responsible for reionization. Magnified galaxies are also observed brightly enough to be prime targets for detailed follow-up study with current and future observatories, including JWST. Building on the successes of CLASH and the Frontier Fields, we have begun RELICS, the Reionization Lensing Cluster Survey. By observing 41 massive clusters for the first time at infrared wavelengths, RELICS will deliver more of the best and brightest high-redshift candidates to the community in time for the November 2017 JWST GO Cycle 1 call for proposals. I will present our early results. I will also discuss prospects for JWST to follow-up known candidates and discover new galaxies at even higher redshifts (z > 11). The discovery efficiency gains from lensing will be even more pronounced at z > 11 if luminosity function faint end slopes are steeper than alpha ~ -2, as suggested by current models and observational extrapolations.

  2. Dragon Daughter Tree

    Institute of Scientific and Technical Information of China (English)

    1995-01-01

    LONG long ago, Heavenly King Mu who ruled the Lijiang River intended to extend his kingdom. In order to occupy Yongning, a fertile land, he wrote to the king of the North (the North was inhabited by the Primmi and Naxi nationalities in Yongning) to propose a marriage between the two families. On the 50th birthday of Heavenly King Mu, his daughter, Princess Longnu (Dragon Daughter), fell in love with the Prince of the North, a kind and handsome young man. The Prince of the North and the Dragon Daughter were deeply attached to each other after their marriage. Before long the King of the North died and the prince became the new King. Heavenly King Mu wanted to

  3. Ethnic Totem and Symbol of State:Culture Value and Ritual Identity of Dragon & Lion Dance%民族图腾与国家象征:龙狮运动的文化价值与仪式认同

    Institute of Scientific and Technical Information of China (English)

    焦英奇; 刘良超

    2014-01-01

    Literatures and other research methods were used to explore the cultural ,historical and ritual characteristics of dragon & lion dance from of cultural ,historical and sociological perspectives ,and we found that :dragon & lion dance comes in different forms ,but its symbolic meaning and ethnic cultural value identity are highly consistent ,and dragon and lion dance culture is a product of agricultural civilization and originated from the worship and belief of totem ;the main wish of traditional dragon and lion dance activities is to bring favorable weather ,peace & prosperity ,good luck and happiness ;dragon and lion dance culture plays to a certain extent the role of strengthening social order and ethnic identity ;the cultural function and value of dragon and lion dance are mainly embodied in :carrying forward the traditional culture and strengthe-ning national identity ;emphasizing the entertainment aesthetic value and having the function of enlightenment ;having the nature of commercial activity and promoting economic and cultural development etc .%运用文献资料等研究方法从文化、历史、社会学的角度探讨龙狮运动的文化性、历史性和仪式性,认为:龙狮运动的形式不一,但是其意义象征和民族文化价值认同具有高度的一致性,龙狮文化是农耕文明的产物,源于对图腾的崇拜与信仰;传统的龙狮活动中人们的主要愿望是实现风调雨顺、国泰民安,驱凶纳吉、生活幸福;龙狮文化在一定程度上承担着对社会秩序的强化和族群认同的作用;龙狮运动的文化功能与价值主要体现在:发扬传统文化,加强民族认同;注重娱乐美感价值,具有教化功能;具有商业活动性质,带动经济文化发展等几个方面。

  4. Wave Dragon Buoyancy Regulation Study

    DEFF Research Database (Denmark)

    Jakobsen, Jens; Kofoed, Jens Peter

    Wave Dragon is a wave energy converter, which was deployed offshore at Nissum Bredning in Denmark in 2003. The experience gained from operating Wave Dragon during 2003 and 2004 has shown that the buoyancy regulation system can be improved in a number of ways. This study describes the current...

  5. Microstructure and application study of secondary calcined lime as consolidant for cultural relics%“二次生石灰”的微结构及作为文物加固剂的应用研究

    Institute of Scientific and Technical Information of China (English)

    魏国锋; 张秉坚; 方世强; 姚政权

    2011-01-01

    在研究二次生石灰微结构的基础上,探讨了以二次生石灰为基础胶结材料用于古代建筑和土遗址加固保护的可行性.二次生石灰的SEM观察结果表明:氢氧化钙经高温(650℃)锻烧以后,脱水成为一种直径为50 nm、长度为200 nm左右的针状纳米氧化钙f将这种纳米氧化钙消化后,会成为一种粒径在200~300nm左右、大小十分均匀的扁平椭圆状纳米氢氧化钙颗粒.同时,研究表明,二次生石灰的纳米级粒径和高反应活性,可以提高二次生石灰糯米灰浆的机械性能,并使二次生石灰-乙醇分散液具有良好的渗透性,较好地解决了传统石灰水加固剂溶解度较小和渗透性较差的问题,从而为士石砖等不可移动文物的基于传统石灰的加固技术提供了新的途径.%On the basis of study on microstructure of secondary calcined lime, this paper probes into applications of secondary calcined lime in conservation of cultural relics. SEM observations show that Ca(OH)2 is transformed into a kind of ac-icular CaO with diameter 50 nm and length 200 nm after being calcined, and this nanosized secondary CaO is transformed into an oval platelike Ca(OH)2 with size 200-300 nm after slaked. Meanwhile, research results indicate that nanosized particles and high reactivity of secondary calcined lime are responsible for superior properties of sticky rice-lime mortar and high permeability of Ca(OH)2-alcohol dispersions, and it is feasible that secondary calcined lime is used for consolidation of soil, stone and brick-based cultural heritage.

  6. Cultural Relics Well Preserved in Tibet

    Institute of Scientific and Technical Information of China (English)

    1995-01-01

    CulturalRelicsWellPreservedinTibetTCRBisteemedwithculturalrelics,whicharewellpreservedeversincethepeacefulliberationofTibet,e...

  7. Relic Gravitational Waves and Their Detection

    CERN Document Server

    Grishchuk, L P

    2001-01-01

    The range of expected amplitudes and spectral slopes of relic (squeezed)gravitational waves, predicted by theory and partially supported byobservations, is within the reach of sensitive gravity-wave detectors. In themost favorable case, the detection of relic gravitational waves can be achievedby the cross-correlation of outputs of the initial laser interferometers inLIGO, VIRGO, GEO600. In the more realistic case, the sensitivity of advancedground-based and space-based laser interferometers will be needed. The specificstatistical signature of relic gravitational waves, associated with thephenomenon of squeezing, is a potential reserve for further improvement of thesignal to noise ratio.

  8. 黔东南苗族“独木龙舟节”桡手服饰及文化内涵%A Cultural Analysis of Rowers′Dress in Miao People′s Dragon Boat Festival

    Institute of Scientific and Technical Information of China (English)

    于倩

    2011-01-01

    勤劳、智慧的苗族人创造了灿烂的文化,但由于苗族历史上没有传承下来的文字,其服饰便被誉为"穿在身上的史书"。苗族服饰不仅具有很高的史料价值,还具有深厚的文化内涵。施洞"苗族独木龙舟节"桡手服饰体现了苗家人对自然环境的适应,承载了苗家人独特的审美、求吉心理和原始信仰,记载了文化的交流和变迁的轨迹。%The industrious and brilliant Miao people have created a gorgeous culture.As there are few written history records passed down,the dress of Miao People are known as "wearable historical record".Their dress has both a high historical value and profound cultural connotations.This paper focuses on the dress of rowers in the Miao people′s Dragon Boat Festival in Shidong,Taijiang County,Southeast Guizhou Miao-Dong Autonomous Prefecture.By analyzing its shape features,this paper tries to explore the cultural signs and Miao people′s cultural mind reflected in the dress.

  9. [Effects of extracts of Dragon's blood on fibroblast proliferation and extracellular matrix hyaluronic acid].

    Science.gov (United States)

    Li, Dan; Hui, Rui; Hu, Yongwu; Han, Yan; Guo, Shuzhong

    2015-01-01

    To investigate the effects of Dragon' s blood extract on proliferation and secret extracellular matrix function of fibroblasts in vitro. Dragon' s blood was extracted by chloroform, acetoacetic ester, alcohol. Human fibroblast were cultured in vitro in media containing gradient dilutions of Dragon' s blood extracts (0.002, 0.02, 0.2, 2, 20 mg/ml) , which was followed by cell proliferation assessed with MTT assay on 0, 12, 24, 36, 48, 60, 72 h. Under the optimal concentration, the cell growth curves were drawn and the flow cytometry (FCM) was used to determine the changes of cell cycle. On 0, 12, 24, 36, 48, 60, 72 h, the concentration of hyaluronic acid in the supernatant of fibroblast culture was measured by radioimmunoassay. 0.2-2 mg/ml Dragon' s blood extracts enhanced the proliferation of fibroblasts in a dose-dependent manner. 2 mg/ml was the optimal dilution of Dragon's blood extract, and it increased the ratio of S cells in cell cycle [(25.80 ± 3.10)%] than control group [(7.50 ± 0.70)%, P Dragon's blood group, concentration of Hyaluronic acid secreted by fibroblasts gradually increased, but were less than control (P Dragon's blood acetoacetic ester extract improved the proliferation of cultured human fibroblasts in vitro, might be beneficial to promote wound healing.

  10. 苯并三氮唑(BTA)在青铜文物缓蚀中的反应活性探讨%Investigation on the reactivity properties of benzotriazole (BTA) in bronze cultural relics protection

    Institute of Scientific and Technical Information of China (English)

    安梅梅; 李晓东

    2012-01-01

    苯并三氮唑(BTA)作为性能优异地金属和气相防腐缓蚀剂而被广泛地应用到青铜保护.采用密度泛函理论(DFT)、概念DFT活性指数和Multiwfn波函数分析法等现代量子化学工具,计算和分析了BTA及高聚物膜[BTA-Cu(Ⅰ)]n中BTA-Cu(Ⅰ)单元的反应活性位点、反应前后前线轨道能和BTA分子反应结构;发现BTA和Cu(Ⅰ)可以发生成键反应,形成的高聚物膜[BTA-Cu(Ⅰ)]n较BTA单独分子在化学键长、键角和UV-Vis吸收峰上有明显地变化,并且从概念DFT的活性指数(主要为μ,η,ω,△En,△Ee)比较中发现,BTA-Cu(Ⅰ)的亲电性和亲核性较BTA有所增加,并计算了BTA-Cu(Ⅰ)单元分子间的相互作用能,%The benzotriazole (BTA) was applied to bronze cultural relics protection with execllect properties of metal antisepsis and gas phase inhibition. Using density functional theory (DFT) , conceptual DFT reactivity index and Multiwfn wavefunction analyzer, the reaction site, frontier molecular orbital energy, reactivity structure and BTA - Cu( I ) unit in polymer film CBTA - Cu( I )]n were systematically investigated in this work. The results showed that the bond length and bond angle in BTA -Cu( I ) unit have changed compared to BTA molecular, judged by conceptual DFT reactivity index (μ,η,ω,ΔEn,ΔEe) about BTA and BTA - Cu( I ) unit, we found the electrophilicity and nucleophilic property were improved compared with BTA. Especially, the more electrophilicity BTA-Cu ( I ) unit will increase reactivity property, the more high polymer film will be formed.

  11. Special Stamps:Historical Relic Beacons

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In May 2002, the State Postal Bureau issued a set of five stamps picturing historical relic beacons. They are the Mao Beacon, the Jiangxinyu Twin Beacon, the Huaniaoshan Beacon, the Laotieshan Beacon, and

  12. Cosmic relics from the big bang

    Energy Technology Data Exchange (ETDEWEB)

    Hall, L.J.

    1988-12-01

    A brief introduction to the big bang picture of the early universe is given. Dark matter is discussed; particularly its implications for elementary particle physics. A classification scheme for dark matter relics is given. 21 refs., 11 figs., 1 tab.

  13. Relic Gravitational Waves and Their Detection

    OpenAIRE

    Grishchuk, L. P.

    2000-01-01

    The range of expected amplitudes and spectral slopes of relic (squeezed) gravitational waves, predicted by theory and partially supported by observations, is within the reach of sensitive gravity-wave detectors. In the most favorable case, the detection of relic gravitational waves can be achieved by the cross-correlation of outputs of the initial laser interferometers in LIGO, VIRGO, GEO600. In the more realistic case, the sensitivity of advanced ground-based and space-based laser interferom...

  14. Relics and episcopal Authority in Sasanian Iran

    Directory of Open Access Journals (Sweden)

    Héctor Ricardo Francisco

    2017-06-01

    Full Text Available This paper analyzes the relationship between episcopacy and the cult of the relics in Sasanian Empire. It will be argued that the cult of martyrs’ relics contributed to the shift in the definition of episcopal Authority in the Church of the East in Fifth Century. In this regard, the tensions over the control of Christian shrines cannot be understood as an actual conflict between preexistent lay and clerical elites.

  15. Impact of Wave Dragon on Wave Climate

    DEFF Research Database (Denmark)

    Andersen, Thomas Lykke; Tedd, James; Kramer, Morten

    This report is an advisory paper for use in determining the wave dragon effects on hydrography, by considering the effect on the wave climate in the region of a wave dragon. This is to be used in the impact assessment for the Wave Dragon pre-commercial demonstrator.......This report is an advisory paper for use in determining the wave dragon effects on hydrography, by considering the effect on the wave climate in the region of a wave dragon. This is to be used in the impact assessment for the Wave Dragon pre-commercial demonstrator....

  16. On Cultural Power in Construction of Local Identify from Perspective of Dragon-Boat Festival's "Application for Intangible Cultural Heritage"%从端午“申遗”看地方建构的文化动力

    Institute of Scientific and Technical Information of China (English)

    刘朝晖

    2011-01-01

    本文以端午"申遗"作为考察对象,探讨地方性的文化生产、文化权利与地方认同之间的关系,以反思地方认同建构过程中的文化动力。文章认为,中国各地端午文化习俗"入遗"与其说是因为各具丰富地方性文化内涵,还不如说是地方社会通过凝聚文化认同的力量,来主张自己的文化权利,以完成地方建构的目的。地方认同的重构既是对市场化、全球化的回应,也是在地方政府的主导下,有意识地被生产出来的。%By studying the Dragon-Boat Festival's application for intangible cultural heritage,this paper discusses the relationship between local cultural production,cultural rights and identity so as to reflect on the cultural power in the construction of local identity.The author argues that it is not just because of a rich cultural connotation of locality that various places in China apply for cultural heritage with the Dragon Boat Festival;rather,it is a way of rallying power of cultural identity and claiming cultural rights,through which the local identity can be constructed.Local identity is reconstructed as an answer to marketization and globalization;it is also produced deliberately under the guidance of local governments.

  17. Application of 3D digital modeling technology to cultural relics in the Museum of the Terra - Cotta Warriors and Horses of Qin Shihuang Case study on terra- cotta warriors in Pit No. 1%文物真三维数字建模技术在秦始皇兵马俑博物馆中的应用——以一号坑陶俑为例

    Institute of Scientific and Technical Information of China (English)

    王婷

    2012-01-01

    With the advent of new developments in science and technology, 3D scanning technology has come to be applied to the preservation of cultural relics. As a case study, the terra - cotta warriors figures excavated in pit No. 1 of the Qin Shihuang Museum of Terracotta Warriors and Horses were scanned. This paper introduces the basic process methods to establish a real 3D model using 3D laser scanning technology. The 3D data system can be used in displays, data analysis and research. Using a real 3D digital modeling system for cuhural relics, it is possible to research, reproduce and reconstruct the relics; this technique also provides new possibilities for the digital exhibi- tion of relics, the establishment of digital museums, the appreciation of cultural relics and the preservation of cul- tural heritage objects.%随着高新技术的发展,文保应用研究中引入了三维扫描技术。通过对秦兵马俑一号坑陶俑的扫描实例,介绍了一套利用三维激光扫描技术建立文物真三维模型的基本流程及方法,并通过文物真三维数据管理系统对模型进行展示、分析与研究。文物真三维数据模型的建立,使全面观察研究、再现和重建遗迹及文物成为可能,为文物的数字化展示、数字博物馆的建立、文物鉴赏以及文化遗产的保存提供了新思路。

  18. 仰韶文化遗址区古土壤色度特征及其气候意义%Chroma Characteristics and Its Climatic Significance of Yangshao Culture Relic

    Institute of Scientific and Technical Information of China (English)

    冯力威; 吴克宁; 查理思; 鞠兵; 王文静

    2015-01-01

    -quantitativly climate conditions in the period of Yangshao Culture, based on choosing a culture profile containing traces of ancient culture and a nature profile with no human disturbance in Yangshao Village Relic paleosol in Henan Province, the comparative study was discussed in this paper. The chroma index of lightness, redness and yellowness were measured respectively by CM-700d from Japan and compared with the magnetic susceptibility and grain size, trying to reveal paleoclimate change. The results showed:Climate proxies such as chroma index and etc can scientifically reflect the changes of paleoclimate in some degree, but the changes reflected by just one climate proxy were one sided. Only by comprehensive analysis of various climate proxies, the reasonable and correct changes can be rebuilt.Due to the interference of human activities,the culture profile’s inversion results of climate were worse than the nature profile’s, but roughly corresponding to the natural profile. Although each climate indicator of two profiles was different, but overall reflecting the same climate information. It can be divided into four climate change stages from below to above, warming period-dry and cold period-warm and himid period-dry and cold period. This result also showed warm and humid climate was the catalyst for the development of civilization, while dry-cold climate would cause the decline of civilization.

  19. Cultural Perspective and Development Strategy of Dragon Boat Festival of the Miao Nationality in the Southeast of Guizhou Province%黔东南苗族龙船节文化透视与发展策略

    Institute of Scientific and Technical Information of China (English)

    周平; 熊少波; 李萍

    2015-01-01

    Investigating culture activities of the Miao Dragon Boat Festival in the southeast of Guizhou province by method of literature, field survey method etc, and form the dimension of time, space, and motivation to explore its cultural connotation. According to restricting factors of development: the change of the lifestyle, the change of the activity pattern, the change of the spontaneous regulation system. Proposed the development model: combined with the tourism industry, combined with school and family education, combine with cultural heritage protection, and also proposed strategies: the restructuring of traditional culture and the construction of the new culture, the diversity of inheritance main body and inheritance behavior, the rationalization of inheritance psychology and inheritance behavior, institutionalization and standardization of Inheritance system.%运用文献资料、实地调研等方法,对黔东南苗族龙船节文化活动进行调查,从时间、空间、动机维度探讨其文化内涵。针对发展制约因素:生活方式的改变、活动图式的变迁、自发调控系统的变化,提出:与旅游产业结合,与学校、家庭教育结合,与文化遗产保护结合的发展模式,以及传统文化的重组与新文化的建构、传承主体与传承行为的多元化、传承心理与传承行为的理性化策略。

  20. Model testing of Wave Dragon

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    Previous to this project a scale model 1:50 of the wave energy converter (WEC) Wave Dragon was built by the Danish Maritime Institute and tested in a wave tank at Aalborg University (AAU). The test programs investigated the movements of the floating structure, mooring forces and forces in the reflectors. The first test was followed by test establishing the efficiency in different sea states. The scale model has also been extensively tested in the EU Joule Craft project JOR-CT98-7027 (Low-Pressure Turbine and Control Equipment for Wave Energy Converters /Wave Dragon) at University College Cork, Hydraulics and Maritime Research Centre, Ireland. The results of the previous model tests have formed the basis for a redesign of the WEC. In this project a reconstruction of the scale 1:50 model and sequential tests of changes to the model geometry and mass distribution parameters will be performed. AAU will make the modifications to the model based on the revised Loewenmark design and perform the tests in their wave tank. Grid connection requirements have been established. A hydro turbine with no movable parts besides the rotor has been developed and a scale model 1:3.5 tested, with a high efficiency over the whole head range. The turbine itself has possibilities for being used in river systems with low head and variable flow, an area of interest for many countries around the world. Finally, a regulation strategy for the turbines has been developed, which is essential for the future deployment of Wave Dragon.The video includes the following: 1. Title, 2. Introduction of the Wave Dragon, 3. Model test series H, Hs = 3 m, Rc = 3 m, 4. Model test series H, Hs = 5 m, Rc = 4 m, 5. Model test series I, Hs = 7 m, Rc = 1.25 m, 6. Model test series I, Hs = 7 m, Rc = 4 m, 7. Rolling title. On this VCD additional versions of the video can be found in the directory 'addvideo' for playing the video on PC's. These versions are: Model testing of Wave Dragon, DVD version

  1. 龙门石窟碳酸盐岩体文物风化作用模拟试验研究%Simulation experiment for weathering of culture relic on carbonate rock palisades in Longmen grottoes

    Institute of Scientific and Technical Information of China (English)

    张傲; 方云; 徐敏; 陈建平; 范子龙

    2012-01-01

    damage to the culture relic in Longmen grottoes.

  2. Exploring the spectroscopic properties of relic radiogalaxies

    CERN Document Server

    Capetti, Alessandro; Baldi, Ranieri D; Buttiglione, Sara; Axon, David J; Celotti, Annalisa; Chiaberge, Marco

    2013-01-01

    From an optical spectroscopic survey of 3CR radiogalaxies (RGs) with z<0.3, we discovered three objects characterized by an extremely low level of gas excitation and a large deficit of line emission with respect to RGs of similar radio luminosity. We interpreted these objects as relic active galactic nuclei (AGN), i.e., sources observed after a large drop in their nuclear activity. We here present new spectroscopic observations for these three galaxies and for a group of "candidate" relics. None of the candidates can be convincingly confirmed. From the new data for the three relics, we estimate the density of the line-emitting gas. This enables us to explore the temporal evolution of the line ratios after the AGN "death". The characteristic timescale is the light-crossing time of the emission line region, a few thousand years, too short to correspond to a substantial population of relic RGs. Additional mechanisms of gas ionization, such as "relic shocks" from their past high power phase or stellar sources,...

  3. Raman spectroscopy of coloured resins used in antiquity: dragon's blood and related substances.

    Science.gov (United States)

    Edward, H G; de Oliveira, L F; Quye, A

    2001-12-01

    Dragon's blood is a deep red resin which has been used for centuries by many cultures and much prized for it's rarity, depth of colour and alchemical associations. The original source of dragon's blood resin is believed to be Dracaena cinnabari from Socotra in Africa, but since mediaeval times there have been several alternatives from different geographical locations from the Canary Islands to the East Indies. Here, the Raman spectra of dragon's blood resins from Dracaena draco Liliacae trees growing in several different locations bordering the Mediterranean and Middle East are compared with the resins from alternative botanical sources such as Daemonorops draco, Dracaena cinnabari and Eucalyptus terminalis, which all generically come under the description of dragon's blood. Key vibrational spectroscopic marker bands are identified in the Raman spectra of the resins, which are suggested for adoption as a protocol for the identification of the botanical and possible geographical sources of modern dragon's blood resins. The Raman spectra of materials, which are falsely attributed to dragon's blood resin are also shown for comparison and identification purposes. Changes in the Raman spectra of genuine dragon's blood resin specimens arising from simple processing treatment during the preparation of the resins for sale are also identified, which suggests a possible attribution characteristic for unknown samples.

  4. Raman spectroscopy of coloured resins used in antiquity: dragon's blood and related substances

    Science.gov (United States)

    Edward, Howell G. M.; de Oliveira, Luiz Fernando C.; Quye, Anita

    2001-12-01

    Dragon's blood is a deep red resin which has been used for centuries by many cultures and much prized for it's rarity, depth of colour and alchemical associations. The original source of dragon's blood resin is believed to be Dracaena cinnabari from Socotra in Africa, but since mediaeval times there have been several alternatives from different geographical locations from the Canary Islands to the East Indies. Here, the Raman spectra of dragon's blood resins from Dracaena draco Liliacae trees growing in several different locations bordering the Mediterranean and Middle East are compared with the resins from alternative botanical sources such as Daemonorops draco, Dracaena cinnabari and Eucalyptus terminalis, which all generically come under the description of dragon's blood. Key vibrational spectroscopic marker bands are identified in the Raman spectra of the resins, which are suggested for adoption as a protocol for the identification of the botanical and possible geographical sources of modern dragon's blood resins. The Raman spectra of materials, which are falsely attributed to dragon's blood resin are also shown for comparison and identification purposes. Changes in the Raman spectra of genuine dragon's blood resin specimens arising from simple processing treatment during the preparation of the resins for sale are also identified, which suggests a possible attribution characteristic for unknown samples.

  5. Feasibility Analysis of Lion and Dragon Dance Sports in Zhejiang Jiyang Academy under the Construction of Campus Culture%校园文化建设下龙狮俱乐部在暨阳学院开展的可行性研究

    Institute of Scientific and Technical Information of China (English)

    吕志

    2016-01-01

    Lion and Dragon Dance sports are Chinese national and traditional sport activities, are the parts of the splendid culture of the Chinese nation. To carry out the dragon-lion sports in colleges and universities, can carry forward the national culture, strengthen students' national self-confidence and pride, cultivate students' humane spirit, enhance students constitution and health, are the important measures to promote the all-round development of students. The Lion and Dragon sport clubs, as one of the main contents of the construction of the campus culture, can fully embody the Lion and Dragon Dance sports to enhance the campus sports culture, inheriting Chinese traditional culture spirit, attach importance to students' subject status, pay attention to the cultivation of the student sports interest and ability, to improve students' physical quality and the spirit of teamwork. At the same time, combined with the characteristics of colleges and universities and the perspectives of favorable conditions, the study puts forward the feasibility and necessity to carry out Lion and Dragon sport clubs in Zhejiang Jiyang Academy.%龙狮运动是中华民族传统的体育活动,是中华民族灿烂文化的一部分。在高校中开展龙狮运动,是弘扬民族文化,增强学生民族自信心与自豪感,培养学生人文精神,增进学生体质与健康,促进学生全面发展的重要举措。把龙狮俱乐部作为校园文化建设的主要内容,可以充分体现龙狮运动对增强校园体育文化、传承我国民族传统文化精神、重视学生的主体地位,注重学生体育兴趣和能力的培养、提高学生身体素质以及团队协作的精神。同时结合高校的特点及有利条件等方面进行研究,提出开展龙狮运动俱乐部的可行性及必要性。

  6. Relics as Probes of Galaxy Cluster Mergers

    Indian Academy of Sciences (India)

    R. J. van Weeren; M. Brüggen; H. J. A. Röttgering; M. Hoeft

    2011-12-01

    Galaxy clusters grow by mergers with other clusters and galaxy groups. These mergers create shocks within the intracluster medium (ICM). It is proposed that particles can be accelerated to extreme energies within the shocks. In the presence of a magnetic field these particles should then form large regions emitting synchrotron radiation, creating the so-called radio relics. An example of a cluster with relics is CIZA J2242.8+5301. Here we present hydrodynamical simulations of idealized binary cluster collisions with the aim of constraining the merger scenario for this cluster. We conclude that by using the location, size and width of double radio relics we can set constraints on the mass ratios, impact parameters, time scales, and viewing geometries of binary cluster merger events.

  7. THE PRELIMINARY STUDY ON LANDSCAPE CULTURE ORIENTATION AND EXPLOITATION OF THE SOUTH DONGTING LAKE WETLAND

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Dongting Lake is internationally an important wetland. We studied and summarized the conception, function, classification and current situation of the wetland-landscape culture in this region. The results showed that the culture of Dongting Lake wetland was rich in diversity, which are the Rice Cultivation Culture, high-balustrade dwelling,Nuo Culture, Ship Culture, Dragon Boat Culture, Chu Culture, Ancient Architecture Landscape, Wetland Foodstuff andCuisine Culture, Civil Art, Historic Heritage and Cultural Relics, Revolutionary Sites and Ruins, and Production andLiving Culture, etc. We also evaluated the eeo-tourism value of wetland landscape culture, and analyzed its features andorientation. The results revealed that the south Dongting Lake wetland plays a key role on the Changjiang(Yangtze) Riverreaches civilization and Chinese civilization, even has great influence on the global civilization. We summarized that thesoul of the south Dongting Lake Culture was Wetland Culture, Water Culture, Rice Cultivation and Chu Culture. Thethoughts, principles and approaches of sustainable exploitation and utilization of the wetland landscape culture were formulated and suggested.

  8. THE PRELIMINARY STUDY ON LANDSCAPE CULTURE ORIENTATION AND EXPLOITATION OF THE SOUTH DONGTING LAKE WETLAND

    Institute of Scientific and Technical Information of China (English)

    HEPing; WANGBao-zhong

    2002-01-01

    Dongting Lake is internationally an important wetland.We summarized the conception,func-tion,classification and current situation of the wetland-landscape culture in this region.The results showed that the cul-ture of Dongting Lake wetland was rich in diversity,which are the Rice Cultivation Culture,high-balustrade dwelling,Nuo Culture,Ship Culture ,Dragon Boat Culture,Chu Culture,Ancient Architecture Landscape,Wetland Foodstuff and Cuisine Culture,Civil Art.Historic Heritage and Cultural Relics,Revolutionary Sites and Ruins,and Production and Living Culture,etc.We also evaluated the eco-tourism value of wetland landscape culture,and analyzed its features and orientation.The results revealed that the south Dongting Lake wetland plays role on the Changjiang(Yangtze)River reaches civilization and Chinese civilization,even has great influence on the global civilization.We summarized that the soul of the south Dongting Lake Culture was Wetland Culture ,Water Culture,Rice Cultivation and Chu Culture.The thoughts ,principles and approaches of sustainable exploitation and utilization of the wetland landscape culture were formulat-ed and suggested.

  9. DRAGONOLOGY: THE IDEA OF THE DRAGON AMONG THE GREEKS AND THE ZULU

    Directory of Open Access Journals (Sweden)

    M. Kirby-Hirst

    2012-03-01

    Full Text Available The dragon is one of the most ubiquitous of images — from its appearance in the dreams of individuals to the legendary works of men like J R R Tolkien — it is known across the world but never viewed in the same way. This article takes a Jungian psychoanalytic approach to the dragon as symbol, and juxtaposes two distinct perspectives on the dragon, that of the ancient Greeks (the mythic dragons Typhon and Python in particular and the Zulu people of South Africa (with special attention given to the place of the python as a possible “dragon” in the practice of divination, in an effort to better understand the creature’s significance to these two cultures and to the world at large.

  10. Wave Dragon Buoyancy Regulation Study

    DEFF Research Database (Denmark)

    Jakobsen, Jens; Kofoed, Jens Peter

    Wave Dragon is a wave energy converter, which was deployed offshore at Nissum Bredning in Denmark in 2003. The experience gained from operating Wave Dragon during 2003 and 2004 has shown that the buoyancy regulation system can be improved in a number of ways. This study describes the current situ...... situation, and proposes a number of activities in order to improve the buoyancy regulation system. This work was performed under EU ENERGIE contract no. ENK5-CT-2002-00603, and is a contribution to WP 2.3/2.4 and D40/D41....

  11. On the Construction of Colleges’ Characteristic P.E. Courses Based on Carrying Forward the Traditional Cultural Values--Case Study of Dragon and Lion Dance Sports%基于弘扬民族传统文化价值的高校体育特色课程构建研究--以舞龙舞狮运动为例

    Institute of Scientific and Technical Information of China (English)

    薛源

    2015-01-01

    Dragon and Lion Dance sports are excellent traditional national sport programs. Developing Dragon and Lion Dance course in universities not only has the profound cultural heritage significance, but also is the inherent requirement of deepening teaching reform, enriching campus cultural life, broadening student’s access to employment, and improving the national spirit of unity and cooperation. Moreover, it is also an important channel for Dragon and Lion Dance sports’ survival and development. The study starts from the values of developing Dragon and Lion Dance sports courses in universities, and analyzes the significance of this activity. In addition, we also, combing current situation, have a synthetic analysis of developing D&L sports in common colleges and universities to further explore the feasibility and necessity of the sports. All in all, we hope this research can provide a theoretical basis for developing Dragon and Lion Dance courses in more colleges and universities.%舞龙舞狮是优秀的民族传统体育项目,在高校中开展龙狮运动这门课程不仅具有深刻的文化传承意义,同时也是深化教学改革、丰富校园文化生活、拓宽学生就业途径、提高民族团结协作精神的内在要求,更是舞龙舞狮运动得以生存和发展的重要途径。文章拟从高校开设舞龙舞狮运动课程的价值入手,分析高校开展舞龙舞狮运动的意义,并结合目前普通高校开展舞龙舞狮运动的现状作综合分析,进一步探讨高校开展舞龙舞狮运动的可行性和必要性,以期为舞龙舞狮运动在更多高校的开展提供理论依据。

  12. SuperIso Relic: A program for calculating relic density and flavor physics observables in Supersymmetry

    Science.gov (United States)

    Arbey, A.; Mahmoudi, F.

    2010-07-01

    We describe SuperIso Relic, a public program for evaluation of relic density and flavor physics observables in the minimal supersymmetric extension of the Standard Model (MSSM). SuperIso Relic is an extension of the SuperIso program which adds to the flavor observables of SuperIso the computation of all possible annihilation and coannihilation processes of the LSP which are required for the relic density calculation. All amplitudes have been generated at the tree level with FeynArts/FormCalc, and widths of the Higgs bosons are computed with FeynHiggs at the two-loop level. SuperIso Relic also provides the possibility to modify the assumptions of the cosmological model, and to study their consequences on the relic density. Catalogue identifier: AEGD_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEGD_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: yes No. of lines in distributed program, including test data, etc.: 2 274 720 No. of bytes in distributed program, including test data, etc.: 6 735 649 Distribution format: tar.gz Programming language: C (C99 Standard compliant) and Fortran Computer: 32- or 64-bit PC, Mac Operating system: Linux, MacOS RAM: 100 Mb Classification: 1.9, 11.6 External routines: ISASUGRA/ISAJET and/or SOFTSUSY, FeynHiggs Does the new version supersede the previous version?: No (AEAN_v2_0) Nature of problem: Calculation of the lightest supersymmetric particle relic density, as well as flavor physics observables, in order to derive constraints on the supersymmetric parameter space. Solution method: SuperIso Relic uses a SUSY Les Houches Accord file, which can be either generated automatically via a call to SOFTSUSY or ISAJET, or provided by the user. This file contains the masses and couplings of the supersymmetric particles. SuperIso Relic then computes the lightest supersymmetric particle relic density as well as the most constraining flavor physics

  13. Antibacterial activities of serum from the Komodo Dragon (Varanus komodoensis

    Directory of Open Access Journals (Sweden)

    Mark Merchant

    2013-07-01

    Full Text Available Komodo dragons (Varanus komodoensis are able to feed on large prey items by injecting a dose of toxic bacteria with their bite that, over time, kills the prey by systemic infection. Dragons also suffer bites from other members of their own species during territorial disputes and feeding frenzies. However, they do not suffer the same fate as their prey, suggesting that they have developed a strong immunity to bacterial infections. This study was undertaken to determine the antibacterial activities of serum from the Komodo dragon. Bacterial cultures were treated with different volumes serum from Varanus komodoensis and the growth was monitored by optical density at 430 nm. In addition, the serum was treated with protease, chelators of divalent metal ions, or with mild heat to determine the mechanism of antibacterial activities. Treatment of bacterial cultures with serum from Komodo dragons (Varanus komodoensis resulted in a volume-dependent decrease in bacterial growth. Cultures of Escherichia coli, Staphylococcus aureus, and Klebsiella oxytoca exhibited moderate-strong growth inhibition by V. komodoensis serum, while cultures of Streptococcus epidermitis, Salmonella typhimurium, Providencia stuartii, and Shigella flexneri were nearly completely obliterated for 24 h by only 10% (v/v serum. The antibacterial activity of V. komodensis serum occurred very rapidly, as 18% of E. coli growth was inhibited by a five min exposure to serum. Furthermore, 10- and 20-min incubations of E. coli with serum from V. komodoensis resulted in 43 and 68% inhibition of bacterial growth, respectively. The bactericidal capacity of the serum against E. coli was 2,075,000 bacteria/μL serum, and was inhibited by mild heat treatment, pronase, EDTA, and phosphate, indicating that the anti-bacterial action is most probably due to the presence of a potent serum complement protein system.

  14. 我国龙舟体育文化传承的人才阻滞现象及机制研究%The Talent Block-phenomena and the Mechanism of Chinese Dragon Boat Sports Cultural Inheritance

    Institute of Scientific and Technical Information of China (English)

    周次保; 王亮; 魏瑶; 刘明

    2016-01-01

    当下我国龙舟体育人才培养工作不能适应龙舟体育文化的发展需求,人才阻滞现象较为严重。针对这一现状,运用文献研究、问卷调查、专家访问、数理统计与逻辑分析等方法,对龙舟体育文化传承的人才阻滞现象及其机制进行深入探讨,结果表明:我国龙舟体育文化传承人才阻滞现象主要呈现为培养理念较滞后、培养目标不明确、人才规格不规范、人才需求有缺失、培养体系不健全、培养策略有缺位与人才质量不理想等。导致龙舟体育文化人才阻滞现象产生的机制取决于其相关制约因素的缺失或异化。这些制约因素可概括为社会因素、经济因素、文化因素、教育因素、体育因素与管理因素等六个方面。廓清我国龙舟体育文化传承的人才阻滞现象及其机制,对于完善龙舟体育文化人才培养体系及促进龙舟体育文化传承发展具有重要的理论价值与实践意义。%In recent years, the talent cultivation of Chinese dragon boat sports can't satisfy the developing demands, which leads to serious talent block-phenomena. The paper, by means of literature research, questionnaire, expert interviews, statistics and logic analysis, deeply probes into such phenomena and the mechanism, and the result shows that there are such block phenomena as backward ideas, unclear cultivation objectives, non-standard talent specifications, incomplete talent demands, unsound cultivating system, defect cultivation strategy and unsatisfactory talent quality. The causes of such phenomena lie mainly on lack or alienation of related restricting factors, including social, economical, cultural, educational, sport and management factors. It is of great theoretical value and practical significance of clearing up the talent block-phenomena and the mechanism for perfecting the talent cultivation system and promoting dragon boat sports cultural inheritance.

  15. 论体育非物质文化遗产与文化产业的发展——以陕南安康龙舟节为例%Development of Sports Non-material Cultural Heritage and Cultural Industry:Taking Dragon Boat Festival of Ankang in South of Shaanxi

    Institute of Scientific and Technical Information of China (English)

    柳慧玲; 李旭芝; 万秦华

    2012-01-01

    通过回顾安康龙舟节的产业化发展历程,分析了体育非物质文化遗产在社会转型时期的产业化发展途径,并提出既要继承体育非物质文化遗产的文化传统,又要使传统活动与时代需要同步发展的原则,从而对我国文化产业的发展,对继承和发展体育非物质文化遗产,提供一个新的思维向度和观察视野.%Through the review of the Dragon Boat Festival industrialization development, the paper analyzes the industrialization development way of the sports intangible cultural heritage in the social transformation period, puts forward that we should not only inherite the traditional culture of sports intangible cultural heritage, but also make the traditional activities develop with the times require, thus provide a new thinking direction and field of view for the development of cultural industry, the inheritance and development of sports intangible cultural heritage.

  16. SpaceX Dragon Air Circulation System

    Science.gov (United States)

    Hernandez, Brenda; Piatrovich, Siarhei; Prina, Mauro

    2011-01-01

    The Dragon capsule is a reusable vehicle being developed by Space Exploration Technologies (SpaceX) that will provide commercial cargo transportation to the International Space Station (ISS). Dragon is designed to be a habitable module while it is berthed to ISS. As such, the Dragon Environmental Control System (ECS) consists of pressure control and pressure equalization, air sampling, fire detection, illumination, and an air circulation system. The air circulation system prevents pockets of stagnant air in Dragon that can be hazardous to the ISS crew. In addition, through the inter-module duct, the air circulation system provides fresh air from ISS into Dragon. To utilize the maximum volume of Dragon for cargo packaging, the Dragon ECS air circulation system is designed around cargo rack optimization. At the same time, the air circulation system is designed to meet the National Aeronautics Space Administration (NASA) inter-module and intra-module ventilation requirements and acoustic requirements. A flight like configuration of the Dragon capsule including the air circulation system was recently assembled for testing to assess the design for inter-module and intra-module ventilation and acoustics. The testing included the Dragon capsule, and flight configuration in the pressure section with cargo racks, lockers, all of the air circulation components, and acoustic treatment. The air circulation test was also used to verify the Computational Fluid Dynamics (CFD) model of the Dragon capsule. The CFD model included the same Dragon internal geometry that was assembled for the test. This paper will describe the Dragon air circulation system design which has been verified by testing the system and with CFD analysis.

  17. Relic Radio Bubbles and Cluster Cooling Flows

    CERN Document Server

    De Young, D S

    2003-01-01

    Recent suggestions that buoyant radio emitting cavities in the intracluster medium can cause significant reheating of cooling flows are re-examined when the effects of the intracluster magnetic field are included. Expansion of the cavity creates a tangential magnetic field in the ICM around the radio source, and this field can suppress instabilities that mix the ICM and the radio source. The onset of instability can be delayed for ~100 million years, and calculation of the actual reheating time shows that this may not occur until about 1Gy after creation of the cavity. These results may explain why the relic radio bubbles are still intact at such late times, and it may imply that the role of radio sources in reheating the ICM should be re-examined. In addition, the existence of relic radio cavities may also imply that the particle content of radio source lobes is primarily electrons and protons rather than electrons and positrons.

  18. Finger of a saint, thumb of a priest: medieval relics in the Diocese of Turku, and the archaeology of lived bodies

    Directory of Open Access Journals (Sweden)

    Visa Immonen

    2011-01-01

    Full Text Available The relics of Turku Cathedral are remains belonging to the bodies of holy persons, different from ours, even today, although the cathedral is the see for the archbishop of the Evangelical Lutheran Church of Finland, and relics are not on public display. Among the relics of the cathedral, there is a fragment of a radius, which according to its authentica, belongs to St Henry. Relics and reliquaries were in the core of medieval piety, and the cult of saints had infused throughout the society. Due to their central position in culture, relics offer glimpses at a range of material, social and cultural phenomena related to medieval embodiment.The Department of Archaeology at the University of Turku began to study the finger relic of St Eric and other items in the assemblage of Turku Cathedral in 2007. Relics and reliquaries are being opened and documented and organic as well as inorganic samples are being taken for a range of scientific analyses. So far the project has concentrated on building a chronological chart of individual artefacts. The majority of the relics date to the fourteenth century, although much more recent datings have also been obtained. The challenge of the project is not to stop when a better understanding of materials, their origins and age has been accomplished, but to use the results as a steppingstone into a study of the practices of medieval relic veneration. Medieval bodies and those material processes which authenticate relics, or distinguish saints’ bodies from other human remains, are thus at the heart of this article discussing embodiment.

  19. Relic neutrino asymmetry evolution from first principles

    OpenAIRE

    Bell, Nicole F.; Volkas, Raymond R.; Wong, Yvonne Y. Y.

    1998-01-01

    The exact Quantum Kinetic Equations for a two-flavour active-sterile neutrino system are used to provide a systematic derivation of approximate evolution equations for the relic neutrino asymmetry. An extension of the adiabatic approximation for matter-affected neutrino oscillations is developed which incorporates decoherence due to collisions. Exact and approximate expressions for the decoherence and repopulation functions are discussed. A first pass is made over the exact treatment of multi...

  20. Relic gravitational waves from quintessential inflation

    Science.gov (United States)

    Ahmad, Safia; Myrzakulov, R.; Sami, M.

    2017-09-01

    We study relic gravitational waves in the paradigm of quintessential inflation. In this framework, irrespective of the underlying model, inflation is followed by the kinetic regime. Thereafter, the field energy density remains subdominant before the onset of acceleration. We carry out model-independent analysis to obtain the temperature at the end of inflation and the estimate for the upper bound on the Hubble parameter to circumvent the problem due to relic gravitational waves. In this process, we use Planck 2015 data to constrain the inflationary phase. We demonstrate that the required temperature can be produced by the mechanism of instant preheating. The generic feature of the scenario includes the presence of the kinetic regime after inflation, which results in the blue spectrum of gravitational wave background at high frequencies. We discuss the prospects of detection of relic gravitational wave background in the advanced LIGO and LISA space-born gravitational wave missions. Finally, we consider a concrete model to realize the paradigm of quintessential inflation and show that inflationary as well as postinflationary evolution can be successfully described by the inflaton potential, V (ϕ )∝Exp (-λ ϕn/MPln)(n >1 ) , by suitably constraining the parameters of the model.

  1. Kaluza-Klein relics from warped reheating

    CERN Document Server

    Berndsen, Aaron; Stoica, Horace

    2007-01-01

    It has been suggested that after brane-antibrane inflation in a Klebanov-Strassler (KS) warped throat, metastable Kaluza-Klein (KK) excitations can be formed due to nearly-conserved angular momenta along isometric directions in the throat. If sufficiently long-lived, these relics could conflict with big bang nucleosynthesis or baryogenesis by dominating the energy density of the universe. We make a detailed estimate of the decay rate of such relics using the low energy effective action of type IIB string theory compactified on the throat geometry, with attention to powers of the warp factor. We find that it is necessary to turn on SUSY-breaking deformations of the KS background in order to ensure that the most dangerous relics will decay. The decay rate is found to be much larger than the naive guess based on the dimension of the operators which break the angular isometries of the throat. For an inflationary warp factor of order w ~ 10^{-4}, we obtain the bound M_{3/2} > 10^8 GeV on the scale of SUSY breaking...

  2. Commissioning and operation of DRAGON

    CERN Document Server

    Engel, S

    2003-01-01

    The new DRAGON (Detector of Recoils And Gammas Of Nuclear reactions) facility, located at the TRIUMF-ISAC radioactive beams laboratory in Vancouver, Canada, has initiated its experimental program. Recently DRAGON was used for initial studies of the sup 2 sup 1 Na(p,gamma) sup 2 sup 2 Mg reaction. This facility was designed to measure absolutely the rates of radiative proton and alpha capture reactions of astrophysical interest to a precision of +-20%, using inverse kinematics. To fully understand the optics and operational parameters of the facility along with the transmission particularly of the reaction recoils, systematic studies of various configurations are in progress using stable beams along with measurements of well-known resonance reactions. The status of these commissioning studies is presented.

  3. Infection with Devriesea agamarum and Chrysosporium guarroi in an inland bearded dragon (Pogona vitticeps).

    Science.gov (United States)

    Schmidt-Ukaj, Silvana; Loncaric, Igor; Klang, Andrea; Spergser, Joachim; Häbich, Annett-Carolin; Knotek, Zdenek

    2014-12-01

    Description of clinical, microbiological and histopathological findings in a case of deep dermatitis in an inland bearded dragon (Pogona vitticeps) caused by Devriesea agamarum and Chrysosporium guarroi. A 4-year-old male inland bearded dragon, weighing 497 g, was presented at the clinic because the animal was suffering from dysecdysis and chronic skin lesions. Large numbers of bacilli, cocci and hyphal elements were diagnosed during the microscopic examination of the wound exudate. Microbiological analysis of a skin specimen revealed a moderate growth of Enterococcus sp. and D. agamarum. The condition of the bearded dragon improved with combined therapy consisting of ceftiofur hydrochloride, voriconazole and meloxicam. However, 3 months later recrudescence was observed. This time, Clostridium sp. and Chrysosporium sp. were isolated in large numbers. The bearded dragon was euthanized. Histopathology confirmed a severe granulomatous dermatitis with associated fungal hyphae and a severe granulomatous hepatitis with intralesional hyphae. Chrysosporium guarroi was identified by PCR and sequencing in two organs (skin and liver). This is the first case of an infection with D. agamarum and C. guarroi in an inland bearded dragon (P. vitticeps). It emphasizes the importance of mycological cultures and specific treatment. Samples of suspected Chrysosporium sp. should be cultured at 30°C for 10-14 days. Early antifungal treatment is necessary to prevent systemic and potentially fatal infection with C. guarroi. © 2014 ESVD and ACVD.

  4. Role Playing Research before Dungeons and Dragons

    DEFF Research Database (Denmark)

    Lieberoth, Andreas

    of Dungeons and Dragons the hobby community quickly took up this more serious mantle as well. Looking to a few unfortunate cases, and the obvious psychological power of role playing experience, many came to believe that role playing can have a profound psychological impact, but few evidence based studies have...... the effects of roleplaying – long before LARP and Dungeons and Dragons....

  5. 浙江温州龙湾地区明代的著姓望族及其对社会经济文化之作用与影响述略%Names and Families in Wenzhou Dragon Bay Area of Zhejiang Province during Ming Dynasty and Their Effects on Social Economy and Culture

    Institute of Scientific and Technical Information of China (English)

    吴仁安

    2012-01-01

    浙江温州龙湾地区在明代由于社会经济持续发展和文化较昌盛,因而涌现出诸如二都黄氏、李浦王氏、永强普门张氏、七甲项氏、英桥王氏、梅头东溪姜氏和前街陈氏等众多望族。这些明代望族中的精英,不仅对于温州龙湾当地,对温州之外的国内其他地方乃至全国的政治、经济和文化等社会生活各方面也均产生过重大的作用与影响。%In Wenzhou Dragon Bay area of Zhejiang province during Ming Dynasty, because of the sustainable development of social economy and more prosperous culture, many names and families emerged in large numbers such as Huang in two capitals, Wang in Li Pu , Zhang in Yongqiang universal door, Xiang in seven Jia, Wang in Ying bridge, Jiang in Dongxi of Meitou, Chen in Front street and other families. These family elite in the Ming Dynasty produced major functions and influences on politics, economy, culture and other various aspects of social life not only in local Dragon Bay area of Wenzhou, but also other areas outside Wenzhou.

  6. A Zoo of Radio Relics: Cluster Cores to Filaments

    Indian Academy of Sciences (India)

    Ruta Kale; K. S. Dwarakanath

    2011-12-01

    Radio relics in galaxy clusters can be electrons accelerated at cluster merger shocks or adiabatically compressed fossil radio cocoons or dying radio galaxies. The spectral evolution of radio relics is affected by the surrounding thermal plasma. We present a low frequency study of three radio relics representing environments of dense cluster core (A4038), cluster outskirts (A1664) and filaments (A786). The properties of the relics are found to be consistent with the effect of confinement by external medium if the effects of projection are ignored.

  7. Supergravity Inflation Free from Harmful Relics

    CERN Document Server

    Greene, P B; Murayama, H; Greene, Patrick B.; Kadota, Kenji; Murayama, Hitoshi

    2003-01-01

    We present a realistic supergravity inflation model which is free from the overproduction of potentially dangerous relics in cosmology, namely moduli and gravitinos which can lead to the inconsistencies with the predictions of baryon asymmetry and nucleosynthesis. The radiative correction turns out to play a crucial role in our analysis which raises the mass of supersymmetry breaking field to intermediate scale. We pay a particular attention to the non-thermal production of gravitinos using the non-minimal Kahler potential we obtained from loop correction. This non-thermal gravitino production however is diminished because of the relatively small scale of inflaton mass and small amplitudes of hidden sector fields.

  8. Noises in Detecting Relic Gravitational Wave

    Institute of Scientific and Technical Information of China (English)

    LEE Zhi-Jun; WAN Zhen-Zhu

    2006-01-01

    We analyse the three basic kinds of noises in detecting the relic gravitational wave (GW), which are the noises caused by the thermal radiation in the detecting cavity and by the scattering of the Gaussian beam in the detecting cavity, and noise in the microwave radiometers. The analysis shows that a reasonable signal-to-noise ratio may be achieved for a detecting device with a suitable geometric structure only when the temperature of the environment is no more than T = 0.6 K, and the power of the radiation of the Gaussian beam is no less than P = 105W.

  9. Outliers and Extremes: Dragon-Kings or Dragon-Fools?

    Science.gov (United States)

    Schertzer, D. J.; Tchiguirinskaia, I.; Lovejoy, S.

    2012-12-01

    Geophysics seems full of monsters like Victor Hugo's Court of Miracles and monstrous extremes have been statistically considered as outliers with respect to more normal events. However, a characteristic magnitude separating abnormal events from normal ones would be at odd with the generic scaling behaviour of nonlinear systems, contrary to "fat tailed" probability distributions and self-organized criticality. More precisely, it can be shown [1] how the apparent monsters could be mere manifestations of a singular measure mishandled as a regular measure. Monstrous fluctuations are the rule, not outliers and they are more frequent than usually thought up to the point that (theoretical) statistical moments can easily be infinite. The empirical estimates of the latter are erratic and diverge with sample size. The corresponding physics is that intense small scale events cannot be smoothed out by upscaling. However, based on a few examples, it has also been argued [2] that one should consider "genuine" outliers of fat tailed distributions so monstrous that they can be called "dragon-kings". We critically analyse these arguments, e.g. finite sample size and statistical estimates of the largest events, multifractal phase transition vs. more classical phase transition. We emphasize the fact that dragon-kings are not needed in order that the largest events become predictable. This is rather reminiscent of the Feast of Fools picturesquely described by Victor Hugo. [1] D. Schertzer, I. Tchiguirinskaia, S. Lovejoy et P. Hubert (2010): No monsters, no miracles: in nonlinear sciences hydrology is not an outlier! Hydrological Sciences Journal, 55 (6) 965 - 979. [2] D. Sornette (2009): Dragon-Kings, Black Swans and the Prediction of Crises. International Journal of Terraspace Science and Engineering 1(3), 1-17.

  10. Relic Radiation from an Evaporating Black Hole

    CERN Document Server

    Farley, A N St J

    2007-01-01

    We present a non-string-theoretic calculation of the microcanonical entropy of relic integer-spin Hawking radiation -- at fixed total energy $E$. The only conserved macroscopic quantity is the total energy $E$ (the total energy of the relic radiation). Data for a boundary-value approach, with massless, integer-spin perturbations, are set on initial and final space-like hypersurfaces. In the resulting 1-dimensional statistical-mechanics problem, the real part of the (complex) time separation at spatial infinity, $T = {\\mid}T{\\mid}\\exp(-i\\delta), \\delta >0$, is the variable conjugate to the total energy. We count the number of weak-field configurations on the final space-like hypersurface with energy $E$. One recovers the Cardy formula and the Bekenstein-Hawking entropy, if Re(T) is of the order of the black-hole life- time, leading to a statistical interpretation of black-hole entropy. The microcanonical entropy includes a logarithmic correction to the black-hole area law, which is {\\it universal} (independent...

  11. The Culture Connotations and Translation Methods of Animal Terms in the Chinese and Western Cultures-Taking Dragon, Phoenix and Snake as Examples%中西文化中动物的文化内涵及翻译方法--以龙、凤、蛇为例

    Institute of Scientific and Technical Information of China (English)

    王静希

    2014-01-01

    语言是文化的载体,每种语言的背后蕴涵着独有的文化内涵。动物词汇也不例外。同一种动物在不同的语言中有各自的拼写形式,而在语言背后则是文化内涵的差异。文章选取具有代表性的龙、凤、蛇为例子,探讨同一种动物在中西文化中不同的文化内涵,以及在翻译的同时如何跨越文化障碍,在彼德·纽马克的语义翻译理论的基础上,提出相应的具体的翻译方法,辅以例子加以佐证。%As a cultural carrier, each language has an unique cultural background. The animal terms are no exception. In different languages, the same kind animal is transliterated into different forms. However, the difference is resulted in the cultural connota-tion. The paper takes the animal terms of dragon, phoenix and sneak as examples to explore the different cultural connotation in China and west world. The paper discusses the translation method overcome the cultural barrier. Guided by the semantic transla-tion put forward by Peter Newmark, the paper propose translation methods, which are supported by examples.

  12. Proximate Analysis of Dragon Fruit (Hylecereus polyhizus

    Directory of Open Access Journals (Sweden)

    Ruzainah A. Jaafar

    2009-01-01

    Full Text Available Problem statement: Dragon fruit (Hylecereus polyhizus is well known for the rich nutrient contents and it is commercially available worldwide for improving many health problems. Several studies show the proximity value of red pitaya fruits but the nutrient composition of the stem has not been extensively studied. Approach: This study was carried out to measure the proximate analysis of moisture content, water activity, ash, crude protein, crude fat, crude fiber, glucose and ascorbic acids content in premature and mature of dragon fruit. The dried powder was produced from the stem of dragon fruit and the proximate analysis of dragon fruit stem was compared between freeze drying process and drying oven process. Results: Results of this study showed that 96% moisture; 0.270 g of protein; 0.552 g L-1 glucose and 132.95 mg L-1 ascorbic acid of dragon fruit stem found higher than the fruit flesh of the dragon fruit. Conclusion: The premature stem had higher values than the mature stem of the dragon fruit which may helpful in preventing the risk factors of certain diseases.

  13. Stimulation of dragon's blood accumulation in Dracaena cambodiana via fungal inoculation.

    Science.gov (United States)

    Cui, Jin-Long; Wang, Chun-Lan; Guo, Shun-Xing; Xiao, Pei-Gen; Wang, Meng-Liang

    2013-06-01

    Dragon's blood is a rare and precious traditional medicine used by different cultures since ancient times. However, studies on enhancing the rapid accumulation of dragon's blood in Dracaena cambodiana and determining its formation mechanism are unavailable. In this study, the activities of two fungi, namely, BJDC01 and BJDC05, and their effect on promoting the accumulation of five main compositions of dragon's blood in D. cambodiana were investigated for the first time. Results of field tests conducted for ten months indicated that the contents of Loureirin D, 4,4'-dihydroxy-2'-dimethoxychalcone, Loureirin A and Loureirin B in two fungal-inoculated materials were 1.67 to 2.85 times greater than those of natural samples, and thus were significantly higher than those of the control groups. The content of 4,4'-dihydroxy-2'6'-dimethoxydihydrochalcone in each fungal-inoculated sample was close to that of the natural sample, and was more than twice of each of the control group. By combining the results of morphological characterizations, both BJDC01 and BJDC05 can stimulate the accumulation of the compositions of dragon's blood. This stimulation may be considered as a defense response of D. cambodiana tree against the invasion of foreign fungi. Thus, this study provides a potential way of producing dragon's blood via the inoculation of two fungal elicitors. Copyright © 2013 Elsevier B.V. All rights reserved.

  14. How not to train your dragon: a case of a Komodo dragon bite.

    Science.gov (United States)

    Borek, Heather A; Charlton, Nathan P

    2015-06-01

    Komodo dragons (Varanus komodoensis) are the world's largest lizards, known for killing prey that exceed their body mass. Reports of bites to humans in the popular press suggest high degrees of morbidity and mortality. Reports in the medical literature are lacking. We describe the case of a zookeeper who was bitten by a Komodo dragon, with a resultant mallet finger. We further discuss the various potential mechanisms of Komodo dragon lethality, including sepsis and venom deposition theories that are useful in guiding management.

  15. Bronze Dragons and Phoenix Table

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    The table is one of the oldest kinds of furniture in China.Most, however, haven’t survived as they were made ofbamboo or wood, The discovery of this bronze table gives usa chance to see a real object from the Warring States Periodfor the first time. This bronze table was unearthed from the tomb of a kingof the Zhongshan Kingdom during the Warring States Periodat today’s Pingshan County, Hebei Province. The stand isformed from four two-winged dragons and four phoenixes

  16. Design of the Wave Dragon Mooring System

    DEFF Research Database (Denmark)

    Parmeggiani, Stefano

    This report is part of the project “Wave Dragon 1.5 MW North Sea Demonstrator”, funded by the Danish Energy Agency under the EUDP program (J.no. 64010-0405). In phase 1 of the project the hydrodynamic characterization of Wave Dragon was carried out through numerical analysis with a model calibrated...... storm conditions typical of the DanWEC location. The most desirable mooring configuration has also been better defined in terms of horizontal compliance. In phase 3 results from phase 1 shall be used to setup a numerical model for time-domain analysis of the composite system Wave Dragon + moorings...

  17. On the Continuity and Interpretation of "Pray Agriculture" Folk-custom of Zhou People:Farming Cultural Connotations of the Festival "Dragon Rise on the 2~(nd) of February of Lunar Calendar" in East Gansu%周人“祈农”民俗传统的延续与演绎——陇东“二月二龙抬头”节俗的农业文化内涵管窥

    Institute of Scientific and Technical Information of China (English)

    隆滟

    2012-01-01

    The festival of "Dragon Rise on the 2nd of February of Lunar Calendar" is an important traditional folk festival in the Northwest and also a festival closely related with the agricultural production.This paper mainly focuses on the farming cultural connotations of the "Dragon Rise on the 2nd of February of Lunar Calendar" such as offering sacrifice to dragon,dragon dancing,snake drawing worship,beating dustpan and the blind game,sprinkling dust,hitting the eaves,community memorial ceremony,carrying on buckets of water in the morning,frying peas,eating flour and vegetable roll,pasting paper dragon,patting tiles,festival haircut,local opera,welcoming wealth,avoiding the taboo of dragon and so on,discusses the continuity and interpretation of "pray agriculture"folk-custom of Zhou people and reveals its contemporary value and the significance of conservation of this traditional festival.%"二月二龙抬头"节是西北民间重要的传统节日,也是一个与农业生产有密切关系的节日。本文主要以陇东地区民间"二月二龙抬头"节俗的民俗事项"祭龙、舞龙、画图拜蛇、打灰簸箕、打瞎瞎、洒灰、击房檐、社祭、担晨水、炒豆豆、吃搅团糊龙头、拍瓦片、理龙头、唱大戏、迎富、避龙忌"等蕴含的文化内涵入手,以期管窥其对周人"祈农"民俗传统的延续与演绎,从而揭示其在当代社会的价值以及对其进行保护的意义。

  18. Scalar modes of the relic gravitons

    CERN Document Server

    Giovannini, Massimo

    2015-01-01

    In conformally flat background geometries the long wavelength gravitons can be described in the fluid approximation and they induce scalar fluctuations both during inflation and in the subsequent radiation-dominated epoch. While this effect is minute and suppressed for a de Sitter stage of expansion, the fluctuations of the energy-momentum pseudo-tensor of the graviton fluid lead to curvature perturbations that increase with time all along the post-inflationary evolution. An explicit calculation of these effects is presented for a standard thermal history and it is shown that the growth of the curvature perturbations caused by the long wavelength modes is approximately compensated by the slope of the power spectra of the energy density, pressure and anisotropic stress of the relic gravitons.

  19. Detection relic gravitational waves in thermal case

    CERN Document Server

    Ghayour, Basem

    2016-01-01

    The thermal spectrum of relic gravitational waves causes the new amplitude that called `modified amplitude'. Our analysis shows that, there exist some chances for detection of the thermal spectrum in addition to the usual spectrum by Adv.LIGO and Dml detectors. The behaviour of the inflation and reheating stages are often known as power law expansion like $S(\\eta)\\propto \\eta^{1+\\beta}$, $S(\\eta)\\propto \\eta^{1+\\beta_s}$ respectively. The $\\beta$ and $\\beta_s$ have an unique effect on the shape of the spectrum. We find some upper bounds on the $\\beta$ and $\\beta_s$ by comparison the usual and thermal spectrum with the Adv.LIGO and Dml. As this result gives us more information about the nature of the evolution of inflation and reheating stages.

  20. Quintessence and the relic density of neutralinos

    Energy Technology Data Exchange (ETDEWEB)

    Salati, Pierre

    2003-10-09

    The archetypal model for the recently discovered dark energy component of the universe is based on the existence of a scalar field whose dynamical evolution comes down today to a non-vanishing cosmological constant. In the past - before big-bang nucleosynthesis for that matter - that scalar field could have gone through a period of kination during which the universe has expanded at a much higher pace than what is currently postulated in the standard radiation dominated cosmology. I examine here the consequences of such a period of kination on the relic abundance of neutralinos and find that the latter could be much higher - by three orders of magnitude - than what is estimated in the canonical derivation. I shortly discuss the implications of this scenario for the dark matter candidates and their astrophysical signatures.

  1. The refractive index of relic gravitons

    CERN Document Server

    Giovannini, Massimo

    2016-01-01

    The dynamical evolution of the refractive index of the tensor modes of the geometry produces a specific class of power spectra characterized by a blue (i.e. slightly increasing) slope which is directly determined by the competition of the slow-roll parameter and of the rate of variation of the refractive index. Throughout the conventional stages of the inflationary and post-inflationary evolution, the microwave background anisotropies measurements, the pulsar timing limits and the big-bang nucleosythesis constraints set stringent bounds on the refractive index and on its rate of variation. Within the physically allowed region of the parameter space the cosmic background of relic gravitons leads to a potentially large signal for the ground based detectors (in their advanced version) and for the proposed space-borne interferometers. Conversely, the lack of direct detection of the signal will set a qualitatively new bound on the dynamical variation of the refractive index.

  2. Anomalous spectral lines and relic quantum nonequilibrium

    CERN Document Server

    Underwood, Nicolas G

    2016-01-01

    We describe general features that might be observed in the line spectra of relic cosmological particles should quantum nonequilibrium be preserved in their statistics. According to our arguments, these features would represent a significant departure from those of a conventional origin. Among other features, we find a possible spectral broadening (for incident photons) that is proportional to the energy resolution of the recording telescope (and so could be orders of magnitude larger than any intrinsic broadening). Notably, for a range of possible initial conditions we find the possibility of spectral line `narrowing' whereby a telescope could observe a spectral line which is narrower than it should conventionally be able to resolve. We briefly discuss implications for the indirect search for dark matter.

  3. 中华龙的本源与起源地的探讨:湖南辰溪%Chenxi, Hunan, a “key” to disclosing Chinese Dragon--- Probe into the Fountainhead of Chinese Dragon

    Institute of Scientific and Technical Information of China (English)

    阳国胜

    2014-01-01

    Chinese Dragon originates from symbol of phenology in field of agricultural cultivation in prehistory .Its biological prototype is“South Snake” with huge body . Dragon totem of ancients comes from the regular unearth of snake hibernation and farmers begin their agricultural cultivation on the basis of unearth of regular hibernation animal . The “Chen” in Chenxi seems like a dragon within Chinese Zodiac .The dragon pattern with 8000 history is unearthed in Chenxi .Totem activities about dragon culture like dragon boat race , etc . are still popular in this county ,which proves ChenXi is the important place of origin .%中华龙是史前期一个农耕物侯标志,其生物原型是个体特大的南蛇;古人的龙图腾源于对规律性冬眠后出土蛇类的崇拜,人们据此确定农时。辰溪的“辰”字在古记时十二生肖中表象为龙,境内出土过距今7800年的龙形图案,且龙舟竞渡等龙崇拜文化源远流长,多学科证据表明辰溪是中华龙文化的重要起源地。

  4. Demonstration of three gorges archaeological relics based on 3D-visualization technology

    Science.gov (United States)

    Xu, Wenli

    2015-12-01

    This paper mainly focuses on the digital demonstration of three gorges archeological relics to exhibit the achievements of the protective measures. A novel and effective method based on 3D-visualization technology, which includes large-scaled landscape reconstruction, virtual studio, and virtual panoramic roaming, etc, is proposed to create a digitized interactive demonstration system. The method contains three stages: pre-processing, 3D modeling and integration. Firstly, abundant archaeological information is classified according to its history and geographical information. Secondly, build up a 3D-model library with the technology of digital images processing and 3D modeling. Thirdly, use virtual reality technology to display the archaeological scenes and cultural relics vividly and realistically. The present work promotes the application of virtual reality to digital projects and enriches the content of digital archaeology.

  5. Dungeons & Dragons: The gamers are revolting! [symposium

    Directory of Open Access Journals (Sweden)

    Rebecca Bryant

    2009-03-01

    Full Text Available The negative response by players to corporate changes to the rule systems governing Dungeons & Dragons suggests that tabletop RPGs have more in common with fan fiction than with computer games.

  6. Wave Overtopping Characteristics of the Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter

    Simulation work has been used extensively with the Wave dragon and other overtopping devices to analyse the power production performance of them and to optimise the structural design and the control strategy. A time domain approach to this is well documented in Jakobsen & Frigaard 1999. Using...... measurements taken from the Wave Dragon Nissum Bredning prototype, some of the previous assumptions have been slightly modified and improved upon, so that the simulation method better represents the reality of what is occurring....

  7. Wave Overtopping Characteristics of the Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter

    Simulation work has been used extensively with the Wave dragon and other overtopping devices to analyse the power production performance of them and to optimise the structural design and the control strategy. A time domain approach to this is well documented in Jakobsen & Frigaard 1999. Using...... measurements taken from the Wave Dragon Nissum Bredning prototype, some of the previous assumptions have been slightly modified and improved upon, so that the simulation method better represents the reality of what is occurring....

  8. Yunnan Huayao Woman's Dragon Dance Phenomenon In Society Cultural Causes--Shiping County Mushan to village sports as a case study%云南彝族支系花腰女子“凤舞龙”现象的社会文化成因探析--以石屏县慕善村村落体育研究为例

    Institute of Scientific and Technical Information of China (English)

    王晓虎

    2015-01-01

    文章以云南省石屏县慕善村彝族支系花腰女子“凤舞龙”现象为研究对象,揭示其形成的社会文化成因,探寻其形成、演进、变迁的历程及发展路径。以透视现代西方体育冲击下和城市化进程中我国少数民族女子体育的现存状况和有效的传承方式,以促进少数民族女子传统体育的可持续发展。%This paper used Literature data method, Interview method,Field work method, Case study method , Deep description of ethnography method and so on. Combines anthropology, Seriously study Huayao people woman’s social and cultural causes dragon dance phenomenon. To reveal its cultural environment and culture reason, to promote the protection, inheritance, development and utilization this valuable folk sports culture is of far-reaching significance. It will grasp its formation, evolution and change and explore its law of development. Looking for in the modern foreign culture under the impact of minority women sport culture development way and effective way, is to promote minority woman sports sustainable development.

  9. Experiments with the Dragon Machine

    Energy Technology Data Exchange (ETDEWEB)

    R.E. Malenfant

    2005-08-12

    The basic characteristics of a self-sustaining chain reaction were demonstrated with the Chicago Pile in 1943, but it was not until early 1945 that sufficient enriched material became available to experimentally verify fast-neutron cross-sections and the kinetic characteristics of a nuclear chain reaction sustained with prompt neutrons alone. However, the demands of wartime and the rapid decline in effort following the cessation of hostilities often resulted in the failure to fully document the experiments or in the loss of documentation as personnel returned to civilian pursuits. When documented, the results were often highly classified. Even when eventually declassified, the data were often not approved for public release until years later.2 Even after declassification and approval for public release, the records are sometimes difficult to find. Through a fortuitous discovery, a set of handwritten notes by ''ORF July 1945'' entitled ''Dragon - Research with a Pulsed Fission Reactor'' was found by William L. Myers in an old storage safe at Pajarito Site of the Los Alamos National Laboratory3. Of course, ORF was identified as Otto R. Frisch. The document was attached to a page in a nondescript spiral bound notebook labeled ''494 Book'' that bore the signatures of Louis Slotin and P. Morrison. The notes also reference an ''Idea LS'' that can only be Louis Slotin. The discovery of the notes led to a search of Laboratory Archives, the negative files of the photo lab, and the Report Library for additional details of the experiments with the Dragon machine that were conducted between January and July 1945. The assembly machine and the experiments were carefully conceived and skillfully executed. The analyses--without the crutch of computers--display real insight into the characteristics of the nuclear chain reaction. The information presented here provides what is believed to be a complete

  10. Natural potential therapeutic agents of neurodegenerative diseases from the traditional herbal medicine Chinese dragon's blood.

    Science.gov (United States)

    Li, Ning; Ma, Zhongjun; Li, Mujie; Xing, Yachao; Hou, Yue

    2014-03-28

    Dragon's blood has been used as a famous traditional medicine since ancient times by many cultures. It is a deep red resin, obtained from more than 20 different species of four distinct genera. Red resin of Dracaena cochinchinensis S.C. Chen, known as Chinese dragon's blood or Yunnan dragon's blood, has been shown to promote blood circulation, alleviate inflammation, and to treat stomach ulcers, diarrhea, diabetes, and bleeding. This study investigated an effective approach to identify natural therapeutic agents for neurodegeneration from herbal medicine. The dichloride extract and isolated effective constituents of Chinese dragon's blood showed quinone oxidoreductase 1 (NQO1) inducing activity and anti-inflammatory effect significantly, which are therapy targets of various neurodegenerative diseases. Multiple chromatography and spectra analysis were utilized to afford effective constituents. Then Hepa 1c1c7 and BV-2 cells were employed to assay their NQO1 inducing and anti-inflammatory activities, respectively. Bioactivities guided isolation afforded 21 effective constituents, including two new polymers cochinchinenene E (1), cochinchinenene F (2) and a new steroid dracaenol C (16). The main constituent 3 (weight percent 0.2%), 5 (weight percent 0.017%), 4 (weight percent 0.009%), 9 (weight percent 0.094%), 10 (weight percent 0.017%) and 8 (weight percent 0.006%) are responsible for the anti-inflammatory activities of Chinese dragon's blood. While, new compounds 1, 2 and known compounds 5, 11 showed good NQO1 inducing activities. The brief feature of the activities and structures was discussed accordingly. Overviewing the bioactivities and phytochemical study result, 4'-hydroxy-2,4-dimethoxydihydrochalcone (3) and pterostilbene (5) as effective constituents of Chinese dragon's blood, were found to be potential candidate therapeutic agents for neurodegenerative diseases. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  11. Using Dragon Curves To Learn about Length and Area.

    Science.gov (United States)

    Smith, Lyle R.

    1999-01-01

    Utilizes dragon curves which are made with three tiles and can be used to create fascinating patterns to help students understand the concepts of length, area, and perimeter of regions as defined by dragon curves. (ASK)

  12. Little Dragon Two: An efficient Multivariate Public Key Cryptosystem

    Directory of Open Access Journals (Sweden)

    Rajesh P Singh

    2010-04-01

    Full Text Available In 1998 [8], Patarin proposed an efficient cryptosystem called Little Dragon which was a variant a variant of Matsumoto Imai cryptosystem C*. However Patarin latter found that Little Dragon cryptosystem is not secure [8], [3]. In this paper we propose a cryptosystem Little Dragon Two which is as efficient as Little Dragon cryptosystem but secure against all the known attacks. Like Little Dragon cryptosystem the public key of Little Dragon Two is mixed type that is quadratic in plaintext and cipher text variables. So the public key size of Little Dragon Two is equal to Little Dragon Cryptosystem. Ourpublic key algorithm is bijective and can be used for both encryption and signatures

  13. Flavonoids from artificially induced dragon's blood of Dracaena cambodiana.

    Science.gov (United States)

    Wang, Hui; Jiang, He-Mei; Li, Fei-Xiang; Chen, Hui-Qin; Liu, Wen-Chao; Ren, Shou-Zhong; Mei, Wen-Li; Dai, Hao-Fu

    2017-09-01

    Dragon's blood is a rare traditional medicine used in many countries. Because of its various therapeutic uses, its requirement is increasing dramatically, while formation of dragon's blood need at least several years, so many researchers tried to induce the formation of dragon's blood artificially, but the chemical constituents of artificially induced dragon's blood were rarely studied. In our research, twenty constituents, including three new ones, were isolated from artificially induced dragon's blood of Dracaena cambodiana, five of which are the same with those from natural dragon's blood. In addition, six compounds exhibited cytotoxic activities, and eleven compounds demonstrated antibacterial activities. Artificially induced dragon's blood is expected to be the substituent of natural dragon's blood. Copyright © 2017 Elsevier B.V. All rights reserved.

  14. 从出土出水文物看唐宋时期中国对印尼的影响%The Impacts on Indonesia brought by China’s Tang and Song Dynasties from the Perspective of Cultural Relics

    Institute of Scientific and Technical Information of China (English)

    廖国一; 郭健新

    2015-01-01

    中国与印度尼西亚是海上邻邦,两国自古以来通过“海上丝绸之路”展开密切的经济交往和文化交流。唐宋时期,中国对印度尼西亚群岛的室利佛逝和三佛齐王国,无论是瓷器及其烧造技术和钱币及其铸造技术对其生产生活,还是泰山封禅仪式对其统治阶级的思想观众都产生了深刻影响。在中国和印尼出土出水的遗物是两国交流的历史见证,体现了中国的技术和文化对印尼群岛人们的影响。在交往过程中,中国的技术和文化逐渐被印尼人民吸收,创造出具有自身民族和地区特色的技术和文化。%China and Indonesia are neighboring countries connected by sea,and have built close-knit economic and cultural ties through the Maritime Silk Road since ancient time.During the Tang and Song dynasties,for the Kingdom of Srivij aya and Samboj a,China had great impacts on their introduction of the manufacturing workmanship of porcelain and metal currency as well as the ideology of the ruling class influenced by the ceremony of Fengshan in Mount Tai.The antiquities unearthed in both China and Indonesia witnessed the communication between these two countries,which embodied the influences brought by Chinese technology and culture on Indonesian people.In this process, they gradually assimilated the technology and culture from China,and developed the technology and culture with their own ethnic and local characteristics.

  15. Characterization of dragon fruit (Hylocereus spp.) components with valorization potential

    OpenAIRE

    Liaotrakoon, Wijitra

    2013-01-01

    Dragon fruit (Hylocereus spp.), also known as pitaya or pitahaya, is increasingly gaining interest in many countries, including Thailand which is a country with a climate ideal for breeding different varieties of tropical and subtropical fruits in general, and dragon fruit more specifically. The benefits of dragon fruit for human health can be explained by its essential nutrients such as vitamins, minerals, complex carbohydrates, dietary fibres and antioxidants. Dragon fruit is also an essent...

  16. Is the Dragon a Suitable Symbol for China?

    Institute of Scientific and Technical Information of China (English)

    孙梦雨

    2007-01-01

    <正>Recently there has been a heated discussion on whether we should continue to use the dragon as the symbol for our China.Some claim that the dragon is no longer a suitable symbol for China. Whereas others don’t think so. A professor Wu in Shanghai who holds the view that the dragon is no good a symbol gives the following reasons.Firstly,the dragon is an evil

  17. 龙与年号%The Chinese Dragon and the Rein Titles

    Institute of Scientific and Technical Information of China (English)

    陆云

    2000-01-01

    The Chinese dragon is a prevalent political symbol in Chinese culture which cannot be seen in any other country. The political flavor of Chinese dragon culture finds its expressions in three respects: 1) the special relationship between dragon and the emperors, the latter being sons of Heaven; 2) dragon being regarded as the symbol d emperors and the taboos associated with it; and 3) the reign titles. Many emperors had a special preference for a reign title named with the Chinese word “dragon”. In Chinese history, there were fourteen such reign titles altogether.%中国龙具有明显的政治性,这是其他国家的龙所没有的。中国龙文化的政治性表现在三方面:一是认为龙与帝王特殊的关系,帝王被视为真龙天子;二是龙被视为帝王的象征,有种种禁忌;三是表现在年号上,不少帝王喜用带有“龙”字的年号,历史上共有带“龙”字的14个年号。

  18. Stochastic backgrounds of relic gravitons: a theoretical appraisal

    CERN Document Server

    Giovannini, Massimo

    2010-01-01

    Stochastic backgrounds or relic gravitons, if ever detected, will constitute a prima facie evidence of physical processes taking place during the earliest stages of the evolution of the plasma. The essentials of the stochastic backgrounds of relic gravitons are hereby introduced and reviewed. The pivotal observables customarily employed to infer the properties of the relic gravitons are discussed both in the framework of the $\\Lambda$CDM paradigm as well as in neighboring contexts. The complementarity between experiments measuring the polarization of the Cosmic Microwave Background (such as, for instance, WMAP, Capmap, Quad, Cbi, just to mention a few) and wide band interferometers (e.g. Virgo, Ligo, Geo, Tama) is emphasized. While the analysis of the microwave sky strongly constrains the low-frequency tail of the relic graviton spectrum, wide-band detectors are sensitive to much higher frequencies where the spectral energy density depends chiefly upon the (poorly known) rate of post-inflationary expansion.

  19. Gauss-Bonnet gravity, relic coherent gravitons and optical chaos

    CERN Document Server

    Crowell, Lawrence B

    2011-01-01

    We discuss the production of massive relic coherent gravitons in Gauss-Bonnet gravity and their possible imprint in Cosmic Microwave Background. In fact, in the very early universe these relic gravitons could have acted as slow gravity waves. They may have then acted to focus the geodesics of radiation and matter. Therefore, their imprint on the later evolution of the universe could appear as filaments and domain wall in the Universe today. In that case, the effect on Cosmic Microwave Background should be analogous to the effect of water waves, which, in focusing light, create optical caustics which are commonly seen on the bottom of swimming pools. We analyze this important issue by showing how relic massive GWs perturb the trajectories of Cosmic Microwave Background photons (gravitational lensing by relic GWs). The consequence of the type of physics discussed is outlined by illustrating an amplification of what might be called optical chaos.

  20. RNA Relics and Origin of Life

    Directory of Open Access Journals (Sweden)

    Laurent Vial

    2009-07-01

    Full Text Available A number of small RNA sequences, located in different non-coding sequences and highly preserved across the tree of life, have been suggested to be molecular fossils, of ancient (and possibly primordial origin. On the other hand, recent years have revealed the existence of ubiquitous roles for small RNA sequences in modern organisms, in functions ranging from cell regulation to antiviral activity. We propose that a single thread can be followed from the beginning of life in RNA structures selected only for stability reasons through the RNA relics and up to the current coevolution of RNA sequences; such an understanding would shed light both on the history and on the present development of the RNA machinery and interactions. After presenting the evidence (by comparing their sequences that points toward a common thread, we discuss a scenario of genome coevolution (with emphasis on viral infectious processes and finally propose a plan for the reevaluation of the stereochemical theory of the genetic code; we claim that it may still be relevant, and not only for understanding the origin of life, but also for a comprehensive picture of regulation in present-day cells.

  1. Stellar Relics from the Early Galaxy

    Indian Academy of Sciences (India)

    T. Sivarani

    2013-03-01

    We reviewed the recent progress in the field of stellar/galactic archeology, which is a study of the relics from the early galaxy. The oldest and most pristine objects that can be observed in the galaxy are the low mass metal poor stars of the Milky Way. They were formed during the early phases, when the ISM might have been polluted only by the Pop-III supernovae. With the recent large spectroscopic surveys (e.g. HK survey by Beers and collaborators, the Hamburg-ESO survey by Christlieb and collaborators and Sloan Digital Sky Survey) it has been possible to get clues on the nature of the first stars that has contributed to the heavy elements. Most of these metal-poor low mass stars also retain their signature of the early dynamical evolution of the galaxy, which can be studied through their orbits around the galaxy and spatial distribution. Here, we discuss the connection between the chemical and the kinematical properties of metal-poor stars in order to probe the early galaxy formation. We also discuss about the globular clusters, the satellite galaxies around the Milky Way and its possible contribution to the formation of the galaxy halo.

  2. Improved calculation of relic gravitational waves

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    In this paper, we have improved the calculation of the relic gravitational waves (RGW) in two aspects. First, we investigate the transfer function by taking into consideration the redshift-suppression effect, the accelerating expansion effect, the damping effect of free-streaming relativistic particles, and the damping effect of cosmic phase transition, and give a simple approximate analytic expression, which clearly illustrates the dependence on the cosmological parameters.Second, we develop a numerical method to calculate the primordial power spectrum of RGW in a very wide frequency range, where the observed constraints on ns (the scalar spectral index) and Ps(ko) (the amplitude of primordial scalar spectrum) and the Hamilton-Jacobi equation are used. This method is applied to two kinds of inflationary models,which satisfy the current constraints on ns, α (the running of ns) and r (the tensor-scalar ratio). We plot them in the r - Ωg diagram, where Ωg is the strength of RGW, and study their measurements from the cosmic microwave background (CMB) experiments and laser interferometers.

  3. RNA relics and origin of life.

    Science.gov (United States)

    Demongeot, Jacques; Glade, Nicolas; Moreira, Andrés; Vial, Laurent

    2009-07-31

    A number of small RNA sequences, located in different non-coding sequences and highly preserved across the tree of life, have been suggested to be molecular fossils, of ancient (and possibly primordial) origin. On the other hand, recent years have revealed the existence of ubiquitous roles for small RNA sequences in modern organisms, in functions ranging from cell regulation to antiviral activity. We propose that a single thread can be followed from the beginning of life in RNA structures selected only for stability reasons through the RNA relics and up to the current coevolution of RNA sequences; such an understanding would shed light both on the history and on the present development of the RNA machinery and interactions. After presenting the evidence (by comparing their sequences) that points toward a common thread, we discuss a scenario of genome coevolution (with emphasis on viral infectious processes) and finally propose a plan for the reevaluation of the stereochemical theory of the genetic code; we claim that it may still be relevant, and not only for understanding the origin of life, but also for a comprehensive picture of regulation in present-day cells.

  4. Culture Consciousness

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    This year, June 10 marked China's first Cultural Heritage Day. The designation by the Chinese Government aims to raise awareness of the need to protect and understand the value of the nation's abundant cultural treasures. In future the second Saturday in June each year will be set aside for this purpose. Recently, the State Council published the sixth group of major relics under state protection. On the list are 1,080 historic relics such as the Grand Canal from Beijing to Hangzhou and the

  5. Relic abundance of WIMPs in non-standard cosmological scenarios

    Energy Technology Data Exchange (ETDEWEB)

    Yimingniyazi, W.

    2007-08-06

    In this thesis we study the relic density n{sub {chi}} of non--relativistic long--lived or stable particles {chi} in various non--standard cosmological scenarios. First, we discuss the relic density in the non--standard cosmological scenario in which the temperature is too low for the particles {chi} to achieve full chemical equilibrium. We also investigated the case where {chi} particles are non--thermally produced from the decay of heavier particles in addition to the usual thermal production. In low temperature scenario, we calculate the relic abundance starting from arbitrary initial temperatures T{sub 0} of the radiation--dominated epoch and derive approximate solutions for the temperature dependence of the relic density which can accurately reproduces numerical results when full thermal equilibrium is not achieved. If full equilibrium is reached, our ansatz no longer reproduces the correct temperature dependence of the {chi} number density. However, we can contrive a semi-analytic formula which gives the correct final relic density, to an accuracy of about 3% or better, for all cross sections and initial temperatures. We also derive the lower bound on the initial temperature T{sub 0}, assuming that the relic particle accounts for the dark matter energy density in the universe. The observed cold dark matter abundance constrains the initial temperature T{sub 0} {>=}m{sub {chi}}/23, where m{sub {chi}} is the mass of {chi}. Second, we discuss the {chi} density in the scenario where the the Hubble parameter is modified. Even in this case, an approximate formula similar to the standard one is found to be capable of predicting the final relic abundance correctly. Choosing the {chi} annihilation cross section such that the observed cold dark matter abundance is reproduced in standard cosmology, we constrain possible modifications of the expansion rate at T {proportional_to}m{sub {chi}}/20, well before Big Bang Nucleosynthesis. (orig.)

  6. Dragon's Blood incense: misbranded as a drug of abuse?

    Science.gov (United States)

    Ford, S L; Steiner, R R; Thiericke, R; Young, R; Soine, W H

    2001-01-01

    An unknown red substance was being sold and used with other drugs of abuse in Virginia (often being used in conjunction with marihuana). The red substance was identified as Dragon's Blood incense from Daemonorops draco. In bioassays, Dragon's Blood incense exhibited a low, but measurable cytotoxicity in in vitro cell lines. Dragon's Blood incense or Volatilized Dragon's Blood had no adverse effect on mouse motor performance based on the inclined screen and rotorod tests. delta(9)-Tetrahydrocannibinol (THC) produced a dose-related decline in mouse performance on the rotorod test. The combination of Dragon's Blood incense or Volatilized Dragon's Blood with delta(9)-THC did not contribute further to the impairment of the mice on the rotorod. This data suggests that the abuse potential for Dragon's Blood incense alone or in combination with marihuana is minimal.

  7. [RP-HPLC characteristics of dragon's blood].

    Science.gov (United States)

    Gao, Xiu-Li; Jiang, Qian; Wang, Peng-Jiao; Zhang, Min

    2007-10-01

    To study the fingerprint of dragon's blood resina draconis by high performance liquid chromatography. The samples are extracted with methanol and separated on a Eclipse XDB-C18 column (4.6 mm x 150 mm, 5 microm) with the mobile phase of acetonitrile-H2O in gradient mode, and the flow rate was 1.0 mL x min(-1), the detection wavelength was 275 nm and the temperature of column was 40 degrees C. Loureirin B was used as the reference compound. HPLC fingerprint of dragon's blood was established and the similarity of the fingerprint was compared. The method is simple, accurate, and can be used to control the quality of dragon's blood.

  8. Hydraulic Model Tests on Modified Wave Dragon

    DEFF Research Database (Denmark)

    Hald, Tue; Lynggaard, Jakob

    A floating model of the Wave Dragon (WD) was built in autumn 1998 by the Danish Maritime Institute in scale 1:50, see Sørensen and Friis-Madsen (1999) for reference. This model was subjected to a series of model tests and subsequent modifications at Aalborg University and in the following...... are found in Hald and Lynggaard (2001). Model tests and reconstruction are carried out during the phase 3 project: ”Wave Dragon. Reconstruction of an existing model in scale 1:50 and sequentiel tests of changes to the model geometry and mass distribution parameters” sponsored by the Danish Energy Agency...

  9. [Research Progress of Raman Spectroscopy on Dyestuff Identification of Ancient Relics and Artifacts].

    Science.gov (United States)

    He, Qiu-ju; Wang, Li-qin

    2016-02-01

    As the birthplace of Silk Road, China has a long dyeing history. The valuable information about the production time, the source of dyeing material, dyeing process and preservation status were existed in organic dyestuff deriving from cultural relics and artifacts. However, because of the low contents, complex compositions and easily degraded of dyestuff, it is always a challenging task to identify the dyestuff in relics analyzing field. As a finger-print spectrum, Raman spectroscopy owns unique superiorities in dyestuff identification. Thus, the principle, characteristic, limitation, progress and development direction of micro-Raman spectroscopy (MRS/µ-Raman), near infrared reflection and Fourier transform Raman spectroscopy (NIR-FT-Raman), surface-enhanced Raman spectroscopy (SERS) and resonance raman spectroscopy (RRS) have been introduced in this paper. Furthermore, the features of Raman spectra of gardenia, curcumin and other natural dyestuffs were classified by MRS technology, and then the fluorescence phenomena of purpurin excitated with different wavelength laser was compared and analyzed. At last, gray green silver colloidal particles were made as the base, then the colorant of madder was identified combining with thin layer chromatography (TLC) separation technology and SERS, the result showed that the surface enhancement effect of silver colloidal particles could significantly reduce fluorescence background of the Raman spectra. It is pointed out that Raman spectroscopy is a rapid and convenient molecular structure qualitative methodology, which has broad application prospect in dyestuff analysis of cultural relics and artifacts. We propose that the combination of multi-Raman spectroscopy, separation technology and long distance transmission technology are the development trends of Raman spectroscopy.

  10. Flavylium chromophores as species markers for dragon's blood resins from Dracaena and Daemonorops trees.

    Science.gov (United States)

    Sousa, Micaela M; Melo, Maria J; Parola, A Jorge; Seixas de Melo, J Sérgio; Catarino, Fernando; Pina, Fernando; Cook, Frances E M; Simmonds, Monique S J; Lopes, João A

    2008-10-31

    A simple and rapid liquid chromatographic method with diode-array UV-vis spectrophotometric detection has been developed for the authentication of dragon's blood resins from Dracaena and Daemonorops trees. Using this method it was discovered that the flavylium chromophores, which contribute to the red colour of these resins, differ among the species and could be used as markers to differentiate among species. A study of parameters, such as time of extraction, proportion of MeOH and pH, was undertaken to optimise the extraction of the flavyliums. This method was then used to make extracts from samples of dragon's blood resin obtained from material of known provenance. From the samples analysed 7,6-dihydroxy-5-methoxyflavylium (dracorhodin), 7,4'-dihydroxy-5-methoxyflavylium (dracoflavylium) and 7,4'-dihydroxyflavylium were selected as species markers for Daemonorops spp., Dracaena draco and Dracaena cinnabari, respectively. The chromatograms from these samples were used to build an HPLC-DAD database. The ability to discriminate among species of dragon's blood using the single marker compounds was compared with a principal components analysis of the chromatograms in the HPLC-DAD database. The results from the HPLC-DAD method based on the presence of these flavylium markers was unequivocal. The HPLC-DAD method was subsequently applied to 37 samples of dragon blood resins from the historical samples in the Economic Botany Collection, Royal Botanic Gardens, Kew. The method identified anomalies in how samples in this collection had been labelled. It is clear that the method can be used to evaluate the provenance of samples used in different areas of cultural heritage. It also could be used to monitor the trade of endangered species of dragon's blood and the species being used in complex formulations of traditional Chinese medicine.

  11. 论传统村落非遗与新型城镇化建设同行--以南宁市缸瓦窑村香火龙为例%Discusses the Jointly Promote New Urbanization Construction and Traditional Village’s Intangible Cultural Heritage--Taking Incense Dragon, Village of Gang Wajiao, Nanning City for Example

    Institute of Scientific and Technical Information of China (English)

    丁智才

    2015-01-01

    传统村落的非物质文化遗产浓缩了地域文化的精华,是地域特色文化鲜活的标本。新型城镇化建设给传统村落非遗保护带来挑战的同时,也孕育着文化传承维新的机遇。传统村落非遗保护与城镇化建设可以同行。利用村落非遗资源融入城市体系,推进特色城镇建设;营造村落文化社区,重建文化空间;重视整体保护,恢复文化生态;因地制宜发展文化产业,以文化资源的产业化推进就地城镇化的实现,从而达到村落非遗保护传承与新型城镇化的共赢。作为传统村落,南宁市缸瓦窑村地处城市新区建设核心地带,其自治区级非遗——香火龙的困境与际遇折射出新型城镇化建设中传统村落非遗保护传承的深层问题与可能路径。%Traditional village’s intangible cultural heritage concentrated essence of local culture, and it is a live specimen of geographical cultural features. On the one hand, the new urbanization brings challenges to the protection of traditional villages; on the other hand, the cultural heritage breeds restoration opportunities. We should make use of genetic resources into non-urban village system to promote characteristics towns, create a village cultural communities and rebuild cultural space, pay attention to the overall protection and restore the cultural ecology; and develop cultural industries according local conditions with cultural resources to promote industrialization, so as to achieve the win-win results ——protection of intangible cultural heritage and realization of new urbanization. As a traditional village, the Wa Gang Jiao is located in core area of Nanning New district, and its provincial level intangible cultural heritage, the dilemma and challenge of Incense Dragon, reflects deep issues and possible paths of the traditional intangible cultural heritage village in the construction of new urbanization .

  12. Advanced Control Techniques for WEC Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter; Jasinski, M.;

    2007-01-01

    This paper presents the ongoing work on control of the Wave Dragon wave energy converter. Research is being conducted in and between several centers across Europe. This is building upon the knowledge gained in the prototype project, and will enable much better performance of the future deployment...

  13. Dragon's blood secretion and its ecological significance.

    Science.gov (United States)

    Jura-Morawiec, Joanna; Tulik, Mirela

    Dragon's blood is the name given to a red exudate produced by some plant species belonging to the genera Daemonorops, Dracaena, Croton and Pterocarpus. These are endemic to various parts of the globe. It is classified as a resin or latex depending on its mode of secretion and its chemical composition, which is species specific. This red substance functions in defence and is produced (a) constitutively and stored in preformed anatomical structures, or (b) by induction in response to traumatic events, such as mechanical injury, pathogen attack or invasion by insects. Apart from its defensive role in plants, dragon's blood is also a valuable natural resource renowned since antiquity for its diverse medicinal properties and uses in art. Despite the great importance of dragon's blood, our knowledge of the biological basis for its secretion is still incomplete. This review summarizes recent advances in the study of the anatomical basis for its secretion, and discusses its classification and ecological function. Bringing some clarity to these issues may also help in the commercial sourcing of dragon's blood.

  14. Experimental Overtopping Investigation for the Wave Dragon

    DEFF Research Database (Denmark)

    Borgarino, Bruno; Kofoed, Jens Peter; Tedd, James

    The present report displays the results from overtopping tests carried on the 1:51.8 Wave Dragon model in September 2007. This tests have been carried on by Bruno Borgarino, James Tedd and Jens Peter Kofoed in the wave tank facilities of Aalborg University. The objective was to provide an updated...

  15. Dragon Boat Festival (Dyun Ngh Jit).

    Science.gov (United States)

    Wu, Julia; Quan, Ella Y.

    This bilingual-bicultural reader in Cantonese and English is intended for elementary school children in a bilingual education setting. Pen-and-ink drawings illustrate the story of the traditional dragon boat festival. Each page of the text is written in Chinese characters, Romanized form, and in English. (NCR)

  16. Ultrasonographic anatomy of bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Bucy, Daniel S; Guzman, David Sanchez-Migallon; Zwingenberger, Allison L

    2015-04-15

    To determine which organs can be reliably visualized ultrasonographically in bearded dragons (Pogona vitticeps), describe their normal ultrasonographic appearance, and describe an ultrasonographic technique for use with this species. Cross-sectional study. 14 healthy bearded dragons (6 females and 8 males). Bearded dragons were manually restrained in dorsal and sternal recumbency, and coelomic organs were evaluated by use of linear 7- to 15-MHz and microconvex 5- to 8-MHz transducers. Visibility, size, echogenicity, and ultrasound transducer position were assessed for each organ. Coelomic ultrasonography with both microconvex and linear ultrasound transducers allowed for visualization of the heart, pleural surface of the lungs, liver, caudal vena cava, aorta, ventral abdominal vein, gallbladder, fat bodies, gastric fundus, cecum, colon, cloaca, kidneys, and testes or ovaries in all animals. The pylorus was visualized in 12 of 14 animals. The small intestinal loops were visualized in 12 of 14 animals with the linear transducer, but could not be reliably identified with the microconvex transducer. The hemipenes were visualized in 7 of 8 males. The adrenal glands and spleen were not identified in any animal. Anechoic free coelomic fluid was present in 11 of 14 animals. Heart width, heart length, ventricular wall thickness, gastric fundus wall thickness, and height of the caudal poles of the kidneys were positively associated with body weight. Testis width was negatively associated with body weight in males. Results indicated coelomic ultrasonography is a potentially valuable imaging modality for assessment of most organs in bearded dragons and can be performed in unsedated animals.

  17. Direct detection of relic active and sterile neutrinos

    CERN Document Server

    Li, Yu-Feng

    2016-01-01

    Both active and sterile sub-eV neutrinos can form the cosmic neutrino background in the early Universe. We consider the beta-decaying (e.g., $^3$H) and EC-decaying (e.g., $^{163}$Ho) nuclei as the promising targets to capture relic neutrinos in the laboratory. We calculate the capture rates of relic electron neutrinos and antineutrinos against the corresponding beta decay or electron capture (EC) decay backgrounds in the (3+$N_{\\rm s}$) flavor mixing scheme, and discuss the future prospect in terms of the PTOLEMY project. We stress that such direct measurements of hot DM might not be hopeless in the long term.

  18. The megaparsec radio relic in supercluster, Rood No. 27

    Science.gov (United States)

    Harris, D. E.; Stern, C. P.; Willis, A. G.; Dewdney, P. E.

    1993-03-01

    Observations of extended source of low surface brightness appear as a 'relic' of a currently inactive radio galaxy. The largest dimension is approximately 1.6 Mpc, the fractional polarization is high, and the magnetic field direction appears to be coherent over scales of at least several hundred kpc. Polarization and morphologies of relics are distinct from those of cluster halos, due to the different environment provided by cluster cores compared to that encountered in the outer fringes of the hot gas distribution which produces X-ray emission.

  19. The megaparsec radio relic in supercluster, Rood No. 27

    Science.gov (United States)

    Harris, D. E.; Stern, C. P.; Willis, A. G.; Dewdney, P. E.

    1993-01-01

    Observations of extended source of low surface brightness appear as a 'relic' of a currently inactive radio galaxy. The largest dimension is approximately 1.6 Mpc, the fractional polarization is high, and the magnetic field direction appears to be coherent over scales of at least several hundred kpc. Polarization and morphologies of relics are distinct from those of cluster halos, due to the different environment provided by cluster cores compared to that encountered in the outer fringes of the hot gas distribution which produces X-ray emission.

  20. Dark Matter Relic Abundance and Light Sterile Neutrinos

    CERN Document Server

    Tang, Yi-Lei

    2016-01-01

    In this paper, we calculate the relic abundance of the dark matter particles when they can annihilate into sterile neutrinos with the mass $\\lesssim 100 \\text{ GeV}$ in a simple model. Unlike the usual standard calculations, the sterile neutrino may fall out of the thermal equilibrium with the thermal bath before the dark matter freezes out. In such case, if the Yukawa coupling between Higgs and sterile neutrino $y_N$ is small, this process gives rise to a larger $\\Omega_{\\text{DM}} h^2$ so we need a larger coupling between dark matter and the sterile neutrino for a correct relic abundance.

  1. Flower symbolism and the cult of relics in medieval Serbia

    Directory of Open Access Journals (Sweden)

    Popović Danica

    2008-01-01

    anchorites, St Peter of Koriša [Petar Koriški] and St Ioannikios of Devič [Joanikije Devički], is described in much the same way. Blossoming as a metaphor for virtuousness and the ascetic struggle did not draw solely upon Psalm 92; it was evoked by a variety of poetic images. The Service to the holy king Milutin, for example, refers to the 'most beautiful flowers of piety', 'diverse flowers of [the king's] many good works', to 'paradise and the lovely lily' or the 'mysterious rose blooming with good works'. The understanding of the ascetic struggle and withdrawal to the desert as a major source of heavenly fragrance and blooming is elaborated with much erudition by Theodosios of Hilandar [Teodosije Hilandarac]. He describes St Sava of Serbia as a 'desert disciple; a child of calling, an offshoot of quietness, a branch of abstinence, a flower of fasting, a fruit of humbleness, perfected by love and compassion'. Theodosios makes ample use of metaphors to describe fragrance as a sign of sanctity and as a vehicle for knowing the higher truth through sensory experience, the truth granted by revelation and divine grace. Similar poetic imagery is found even in post-Kosovo Serbian literature when the predominant saintly model becomes that of the martyr ruler. Thus Gregory Tsamblak [Grigorije Camblak] likens the relics of Stefan of Decani to the flowers of martyrdom and associates them with illumination: 'For at first he grew in your midst as a fragrant rose, and now, amidst the martyrs, he shines forth as a bright star.' Similar attributes were accorded to the relics of the greatest martyr of Kosovo, holy prince Lazar, likened by the writer of his Service to the rose and the lily. The traditional topos of blooming and renewal in the context of the cult of relics continued into the modern age, and in various domains of culture. In the jurisdictional area of the Patriarchate of Pec, this is particularly noticeable in the work of patriarch Paisios [Pajsije] (1614-1647. His

  2. [New study on species of Chinese medicine dragon's blood].

    Science.gov (United States)

    Zhang, Wei; Zhang, Rui-Xian; Li, Jian; Zhao, Hai-Liang

    2016-04-01

    Through comprehensive study on the descriptions of dragon's blood in traditional medical books, we pointed out that before Tang Dynasty, Butea monosperma was used as dragon's blood; during Tang and Song Dynasty, Liquidambar formosana. was used as dragon's blood; in Commentaries on the illustrations of Song Dynasty, the author made a mistake by combined the descriptions of Butea monosperma with the descriptions of the prepared medicine of Dracaena cochinchinensis in dragon's blood, and thus the oversea species D. cochinchinensis became the mainstream of dragon's blood source in homeland. Until the foundation of the Republic of China, Daemonorops draco replaced D. cochinchinensis to the main source of dragon's blood. Copyright© by the Chinese Pharmaceutical Association.

  3. 文化身份视角下的《龙子》与《四世同堂》人物形象比较分析%Comparative Analysis of Figure Images in Dragon Seed and Four Generations Under One Roof from the View of Cultural Identity

    Institute of Scientific and Technical Information of China (English)

    张桂玲; 邱丽娟

    2014-01-01

    作家的文化身份对其文学创作有着深刻的影响,赛珍珠的《龙子》和老舍的《四世同堂》同样都是以日军侵华战争为主题的小说,但由于作家的文化身份不同,所以他们的抗战小说也呈现出诸多相异之处。以《龙子》和《四世同堂》主要人物为例,分析了作品中的几组同类型人物形象,探析了作家的文化身份对其人物形象书写的影响,归纳了他们塑造人物形象的特色,为研究异质文化身份下的文学创作提供参考。%The authors’cultural identity tends to have a profound influence on their literature creation. Pearl S.Buck’s DragonSeed shares the same theme of the Japanese invasion of China with Lao She’s Four GenerationsUnder One Roof,but there are a lot of differences in some respects due to their different cul-tural identities.Taking the main figures in these two novels as examples,the paper analyzes several types of characters,explores the influence of their cultural identities on the depiction of figure images,and summari-zes the features of their moulding figure images,which provides a reference for literature creation with dif-ferent cultural identities.

  4. Dusty Relic to Shining Treasure: Embedded in a Multicultural Environment

    Science.gov (United States)

    Avery, Beth Fuseler; Batman, Cindy

    2014-01-01

    Far from being dusty old relics who are guardians of the book, embedded librarians need to be proactively leading students through the digital maze of the virtual library. Working with students more than 7,000 miles away changed perceptions of how to teach and learn, and how people interact online. We will share how as embedded librarians we…

  5. ƒ(R Gravity, Relic Coherent Gravitons and Optical Chaos

    Directory of Open Access Journals (Sweden)

    Lawrence B. Crowell

    2014-03-01

    Full Text Available We discuss the production of massive relic coherent gravitons in a particular class of ƒ(R gravity, which arises from string theory, and their possible imprint in the Cosmic Microwave Background. In fact, in the very early Universe, these relic gravitons could have acted as slow gravity waves. They may have then acted to focus the geodesics of radiation and matter. Therefore, their imprint on the later evolution of the Universe could appear as filaments and a domain wall in the Universe today. In that case, the effect on the Cosmic Microwave Background should be analogous to the effect of water waves, which, in focusing light, create optical caustics, which are commonly seen on the bottom of swimming pools. We analyze this important issue by showing how relic massive gravity waves (GWs perturb the trajectories of the Cosmic Microwave Background photons (gravitational lensing by relic GWs. The consequence of the type of physics discussed is outlined by illustrating an amplification of what might be called optical chaos.

  6. Spectral age modelling of the `Sausage' cluster radio relic

    Science.gov (United States)

    Stroe, Andra; Harwood, Jeremy J.; Hardcastle, Martin J.; Röttgering, Huub J. A.

    2014-12-01

    CIZA J2242.8+5301 is a post-core passage, binary merging cluster that hosts a large, thin, arc-like radio relic, nicknamed the `Sausage', tracing a relatively strong shock front. We perform spatially resolved spectral fitting to the available radio data for this radio relic, using a variety of spectral ageing models, with the aim of finding a consistent set of parameters for the shock and radio plasma. We determine an injection index of 0.77^{+0.03}_{-0.02} for the relic plasma, significantly steeper than was found before. Standard particle acceleration at the shock front implies a Mach number M=2.90^{+0.10}_{-0.13}, which now matches X-ray measurements. The shock advance speed is vshock ≈ 2500 km s-1, which places the core passage of the two subclusters 0.6-0.8 Gyr ago. We find a systematic spectral age increase from 0 at the northern side of the relic up to ˜60 Myr at ˜145 kpc into the downstream area, assuming a 0.6 nT magnetic field. Under the assumption of freely ageing electrons after acceleration by the `Sausage' shock, the spectral ages are hard to reconcile with the shock speed derived from X-ray and radio observations. Re-acceleration or unusually efficient transport of particle in the downstream area and line-of-sight mixing could help explain the systematically low spectral ages.

  7. Spectral age modelling of the `Sausage' cluster radio relic

    CERN Document Server

    Stroe, Andra; Hardcastle, Martin J; Röttgering, Huub J A

    2014-01-01

    CIZA J2242.8+5301 is a post-core passage, binary merging cluster that hosts a large, thin, arc-like radio relic, nicknamed the `Sausage', tracing a relatively strong shock front. We perform spatially-resolved spectral fitting to the available radio data for this radio relic, using a variety of spectral ageing models, with the aim of finding a consistent set of parameters for the shock and radio plasma. We determine an injection index of $0.77^{+0.03}_{-0.02}$ for the relic plasma, significantly steeper than was found before. Standard particle acceleration at the shock front implies a Mach number $M=2.90^{+0.10}_{-0.13}$, which now matches X-ray measurements. The shock advance speed is $v_\\mathrm{shock}\\approx2500$ km s$^{-1}$, which places the core passage of the two subclusters $0.6-0.8$ Gyr ago. We find a systematic spectral age increase from $0$ at the northern side of the relic up to $\\sim60$ Myr at $\\sim145$ kpc into the downstream area, assuming a $0.6$ nT magnetic field. Under the assumption of freely-...

  8. Shock Acceleration Model for the Toothbrush Radio Relic

    Science.gov (United States)

    Kang, Hyesung; Ryu, Dongsu; Jones, T. W.

    2017-05-01

    Although many of the observed properties of giant radio relics detected in the outskirts of galaxy clusters can be explained by relativistic electrons accelerated at merger-driven shocks, significant puzzles remain. In the case of the so-called Toothbrush relic, the shock Mach number estimated from X-ray observations ({M}{{X}}≈ 1.2{--}1.5) is substantially weaker than that inferred from the radio spectral index ({M}{rad}≈ 2.8). Toward understanding such a discrepancy, we here consider the following diffusive shock acceleration (DSA) models: (1) weak-shock models with {M}{{s}}≲ 2 and a preexisting population of cosmic-ray electrons (CRe) with a flat energy spectrum, and (2) strong-shock models with {M}{{s}}≈ 3 and either shock-generated suprathermal electrons or preexisting fossil CRe. We calculate the synchrotron emission from the accelerated CRe, following the time evolution of the electron DSA, and the subsequent radiative cooling and postshock turbulent acceleration (TA). We find that both models could reproduce reasonably well the observed integrated radio spectrum of the Toothbrush relic, but the observed broad transverse profile requires the stochastic acceleration by downstream turbulence, which we label “turbulent acceleration” or TA to distinguish it from DSA. Moreover, to account for the almost uniform radio spectral index profile along the length of the relic, the weak-shock models require a preshock region over 400 kpc with a uniform population of preexisting CRe with a high cutoff energy (≳ 40 {GeV}). Due to the short cooling time, it is challenging to explain the origin of such energetic electrons. Therefore, we suggest the strong-shock models with low-energy seed CRe (≲ 150 {MeV}) are preferred for the radio observations of this relic.

  9. Inheritance Mode of Hakka Folk Sports as Intangible Culture Heritage--With Gutian Dragons Inspection as an Example%闽西客家民俗体育非物质文化遗产的传承模式--以连城姑田游大龙的考察为例

    Institute of Scientific and Technical Information of China (English)

    温艳蓉

    2013-01-01

    Taking Gutian dragon as the research object, and through the field survey, the paper does the analysis of Hakka folk sports heritage content and inheritance pattern. It is concluded that the Hakka folk sports protection inheritance model mainly include person to person one by one teaching, with single developing way;its artificial making mainly by manual works with complex process;its culture mainly constructed by traditional relief with complex social reasons. But Hakka people all worships dragon. Through the study, the paper finds out the inheriting mode for Hakka ethnic sports:(1)Thoroughly carry out survey work and complete databases;(2)The government as the leading power, encourage social financial support; (3) Protect and train the inheritors of Hakka folk sports;(4)Tourism development as an opportunity to play a role in industry.%  文章以连城姑田游大龙为研究对象,通过田野调查探析了闽西客家民俗体育的传承内容以及传承模式。研究表明,在传承方式、制作工艺上主要靠言传身教,传承谱系较为单一;从其制作工艺来看,多为手工扎制,工艺流程复杂,制作工艺考究;从传说信仰方面来看,形成原因虽然复杂,但闽西客家民间对于“龙”都有共同的崇拜。通过对客家民俗体育的考察研究,得出闽西客家民俗体育的保护传承模式为:(1)应全面深入开展普查工作,建立资料数据库;(2)以政府为主导,鼓励社会加大资金支持;(3)对客家民俗体育传承人的保护和培养;(4)以旅游发展为契机,发挥产业推动作用。

  10. Background Study on Supernova Relic Neutrinos Search in SuperK-Gd

    CERN Document Server

    Zhang, Yang

    2016-01-01

    The detection of supernova relic neutrinos could provide precious information on the evolution of the universe, the formation of stars, the mechanism of supernova bursts and the related neutrino physics. Many experiments, such as Kamland, Borexino, Sudbury Neutrino Observatory and Super-Kamiokande have conducted searches for the supernova relic neutrinos. However, no supernova relic neutrino signal has been observed until now. This paper reports the background study on the supernova relic neutrinos search for the future neutrino experiment in SuperK-Gd project. The expected event rate for various background sources and supernova relic neutrino models are calculated, respectively.

  11. My Six- Months Internship in "The Dragon"

    Institute of Scientific and Technical Information of China (English)

    程婧莹

    2011-01-01

    @@ In order to complete my first year at SHMS Caux I was required to fulfil a six-months internship in the hotel.I have chosen to work in the "Dragon Hotel".I had the pleasure of having my first year internship there.All the things for me is fresh and strange.I faced many difficulties and problems while I was doing my internship.

  12. First test of the dragon equipment

    Directory of Open Access Journals (Sweden)

    V. V. Voitsekhovich

    2005-01-01

    Full Text Available El equipo DRAGON constituye un nuevo instrumento astronómico diseñado para llevar a cabo diversas investigaciones relacionadas con óptica adaptativa, óptica activa, astronomía observacional e instrumentación astronómica. En este artículo presentamos los resultados de las primeras pruebas de este instrumento llevadas a cabo en el OAN-Tonantzintla (México.

  13. Restoring Cultural Heritage Sites

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Most of the post-quake cultural heritage rescue and protection projects in Sichuan have been completed The State Administration of Cultural Heritage recently rewarded 132 individuals and organizations for their work in rescuing and protecting cultural relics damaged by the Wenchuan earthquake on May12,2008.

  14. Measuring radiative capture rates at DRAGON

    Science.gov (United States)

    Hager, U.; Davids, B.; Fallis, J.; Greife, U.; Hutcheon, D. A.; Rojas, A.; Ruiz, C.

    2013-04-01

    The DRAGON recoil separator facility is located at the ISAC facility at TRIUMF, Vancouver. It is designed to measure radiative alpha and proton capture reactions of astrophysical importance in inverse kinematics. The Supernanogan ion source at ISAC provides stable beams of high intensities. The DRAGON collaboration has taken advantage of this over the last years by measuring several reactions requiring high-intensity stable oxygen beams. In particular,the ^17O(p,γ) and ^16O(α,γ) reaction rates were recently measured. The former reaction is part of the hot CNO cycle, and strongly influences the abundance of ^18F in classical novae. Because of its relatively long lifetime, ^18F is a possible target for satellite-based gamma-ray spectroscopy. The ^16O(α,γ) reaction plays a role in steady-state helium burning in massive stars, where it follows the ^12C(α,γ) reaction. At astrophysically relevant energies, the reaction proceeds exclusively via direct capture, resulting in a low rate. In both cases, the unique capabilities of DRAGON enabled determination not only of the total reaction rates, but also of decay branching ratios. Results from both experiments will be presented.

  15. Dark matter relic density in Gauss-Bonnet braneworld cosmology

    Energy Technology Data Exchange (ETDEWEB)

    Meehan, Michael T.; Whittingham, Ian B., E-mail: Michael.Meehan@my.jcu.edu.au, E-mail: Ian.Whittingham@jcu.edu.au [College of Science, Technology and Engineering, James Cook University, 1 James Cook Dr., Townsville 4811 (Australia)

    2014-12-01

    The relic density of symmetric and asymmetric dark matter in a Gauss-Bonnet (GB) modified Randall-Sundrum (RS) type II braneworld cosmology is investigated. The existing study of symmetric dark matter in a GB braneworld (Okada and Okada, 2009) found that the expansion rate was reduced compared to that in standard General Relativity (GR), thereby delaying particle freeze-out and resulting in relic abundances which are suppressed by up to O(10{sup −2}). This is in direct contrast to the behaviour observed in RS braneworlds where the expansion rate is enhanced and the final relic abundance boosted. However, this finding that relic abundances are suppressed in a GB braneworld is based upon a highly contrived situation in which the GB era evolves directly into a standard GR era, rather than passing through a RS era as is the general situation. This collapse of the RS era requires equating the mass scale m{sub α} of the GB modification and the mass scale m{sub σ} of the brane tension. However, if the GB contribution is to be considered as the lowest order correction from string theory to the RS action, we would expect m{sub α} > m{sub σ}. We investigate the effect upon the relic abundance of choosing more realistic values for the ratio R{sub m} ≡ m{sub α}/m{sub σ} and find that the relic abundance can be either enhanced or suppressed by more than two orders of magnitude. However, suppression only occurs for a small range of parameter choices and, overwhelmingly, the predominant situation is that of enhancement as we recover the usual Randall-Sundrum type behaviour in the limit R{sub m} >> 1. We use the latest observational bound Ω{sub DM}h{sup 2} = 0.1187 ± 0.0017 to constrain the various model parameters and briefly discuss the implications for direct/indirect dark matter detection experiments as well as dark matter particle models.

  16. Overtopping Measurements on the Wave Dragon Nissum Bredning Prototype

    DEFF Research Database (Denmark)

    Frigaard, Peter; Kofoed, Jens Peter; Rasmussen, Michael R.

    2004-01-01

    The paper describes the methods used to estimate (calculated from some indirect measurements) the overtopping of the wave energy converter Wave Dragon placed in a real sea environment. The wave energy converter in quistion is the 237-tonne heavy Wave Dragon Nissum Bredning Prototype. Comparisons...

  17. Dark matter relic density in Gauss-Bonnet braneworld cosmology

    CERN Document Server

    Meehan, Michael T

    2014-01-01

    The relic density of symmetric and asymmetric dark matter in the Gauss-Bonnet braneworld cosmology is investigated. The reduced expansion rate in this scenario delays particle freeze-out, leading to relic abundances which are suppressed by up to $\\mathcal{O}(10^{-3})$. In this case the annihilation cross section must be reduced by up to two orders of magnitude below the canonical value $\\langle\\sigma v\\rangle \\approx 2\\times 10^{-26}$ cm$^3$s$^{-1}$ to reconcile the predicted dark matter density with observation. We use the latest observational bound $\\Omega_{DM}h^2 = 0.1187 \\pm 0.0017$ to constrain the various model parameters and discuss the implications for direct/indirect dark matter detection experiments as well as dark matter particle models.

  18. Magnetic domain walls of relic neutrinos as Dark Energy

    CERN Document Server

    Yajnik, U A

    2006-01-01

    The observed Dark Energy component of the cosmic energy density is well fitted by domain wall matter which scales as $S(t)^{-1}$ where $S$ is the Friedmann-Robertson-Walker (FRW) scale factor. We show that relic neutrinos of the Big Bang can enter a ferromagnetic state governed by Stoner theory provided they are a degenerate gas and possess a magnetic moment. The domain walls of this ferromagnetism behave as Dark Energy. The degeneracy requirement accords with Big Bang nucleosynthesis expectations of large chemical potentials for neutrinos and provides an estimate for the same. At least one of the the mass eigenstate neutrinos would have to possess a magnetic moment greater than $10^{-9}$ Bohr magneton. Any other relic contributing to Hot Dark Matter could also provide an interesting candidate.

  19. A shock front at the radio relic of Abell 2744

    Science.gov (United States)

    Eckert, D.; Jauzac, M.; Vazza, F.; Owers, M. S.; Kneib, J.-P.; Tchernin, C.; Intema, H.; Knowles, K.

    2016-09-01

    Radio relics are Mpc-scale diffuse radio sources at the peripheries of galaxy clusters which are thought to trace outgoing merger shocks. We present XMM-Newton and Suzaku observations of the galaxy cluster Abell 2744 (z = 0.306), which reveal the presence of a shock front 1.5 Mpc east of the cluster core. The surface-brightness jump coincides with the position of a known radio relic. Although the surface-brightness jump indicates a weak shock with a Mach number M=1.7_{-0.3}^{+0.5}, the plasma in the post-shock region has been heated to a very high temperature (˜13 keV) by the passage of the shock wave. The low-acceleration efficiency expected from such a weak shock suggests that mildly relativistic electrons have been re-accelerated by the passage of the shock front.

  20. Numeric Spectrum of Relic Gravitational Waves in Accelerating Universe

    Institute of Scientific and Technical Information of China (English)

    ZHANG Yang; ZHAO Wen; YUAN Ye-Fei; XIA Tian-Yang

    2005-01-01

    @@ The accelerating expansion of the Universe in the present stage is a process that will change the spectrum of relic gravitational waves. Here we present a numerical calculation for the power spectrum of relic gravitational waves in the accelerating Universe. The results show that although the overall features of the power spectrum are similar to those in the non-accelerating models, the amplitude is smaller in order of 10-1. We also find that the spectrum is very sensitive to the index β of the inflationary expansion with the scale factor a(τ) ∝ |τ|1+β. With increase of β, the resulting spectrum tends to be flatter with more power on high frequencies, and the sensitivity of the second science run of the LIGO detectors puts a restriction on the parameterβ< -1.8. The influence of reheating followed by the inflation has been examined.

  1. Investing in Tibet’s Culture

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Large amounts of money are being pumped into Tibet to preserve the region’s cultural relics Benovation work on Tibet’s Potala Palace and Norbu Lingka has re- sumed as the weather gets warmer, according to a cultural relics offi- cial in the Tibet Autonomous Region (TAR). Only a short period of the year is suitable for renovation work because of the high alti- tude and unfavorable weather conditions in Tibet,said Nyima Tsering,head of the TAR Cultural Relics Bureau.The bitter cold in winter affects the quality of renovation work so it has to be postponed until temperatures increase,he explained.

  2. Neutralino Relic Density in the CPVMSSM at the ILC

    CERN Document Server

    Bélanger, G; Kraml, S; Martyn, H U; Pukhov, A

    2009-01-01

    We discuss ILC measurements for a specific MSSM scenario with CP phases, where the lightest neutralino, a candidate for dark matter, annihilates through t-channel exchange of light staus. These prospective ILC measurements are used to fit the underlying model parameters. A collider prediction of the relic density of the neutralino from this fit gives 0.116

  3. Re-acceleration model for the "Toothbrush" Radio Relic

    CERN Document Server

    Kang, Hyesung

    2016-01-01

    The Toothbrush radio relic associated the merging cluster 1RXS J060303.3 is presumed to be produced by relativistic electrons accelerated at merger-driven shocks. Since the shock Mach number inferred from the observed radio spectral index, $M_{radio}\\approx 2.8$, is larger than that estimated from X-ray observations, $M_{X-ray}\\lesssim 1.5$, we consider the re-acceleration model in which a weak shock of $M_s\\approx 1.2-1.5$ sweeps through the intracluster plasma with a preshock population of relativistic electrons. We find the models with a power-law momentum spectrum with the slope, $s\\approx 4.6$, and the cutoff Lorentz factor, $\\gamma_{e,c}\\approx 7-8\\times 10^4$ can reproduce reasonably well the observed profiles of radio fluxes and integrated radio spectrum of the head portion of the Toothbrush relic. This study confirms the strong connection between the ubiquitous presence of fossil relativistic plasma originated from AGNs and the shock-acceleration model of radio relics in the intracluster medium.

  4. Re-acceleration Model for Radio Relics with Spectral Curvature

    CERN Document Server

    Kang, Hyesung

    2016-01-01

    Most of the observed features of radio gischt relics such as spectral steepening across the relic width and power-law-like integrated spectrum can be adequately explained by diffusive shock acceleration (DSA) model, in which relativistic electrons are (re-)accelerated at shock waves induced in the intracluster medium. However, Kang & Ryu (2015) showed that the steep spectral curvature in the integrated spectrum above $\\sim 2$ GHz detected in the Sausage relic in cluster CIZA J2242.8+5301 may not be interpreted by simple radiative cooling of postshock electrons. In order to understand such steepening, we here consider a model in which a spherical shock sweeps through and then exits out of a finite-size cloud with fossil relativistic electrons. The ensuing integrated radio spectrum is expected to steepen much more than predicted for aging postshock electrons, since the re-acceleration stops after the cloud-crossing time. Using DSA simulations that are intended to reproduce radio observations of the Sausage ...

  5. A shock at the radio relic position in Abell 115

    CERN Document Server

    Botteon, A; Brunetti, G; Dallacasa, D

    2016-01-01

    We analyzed a deep Chandra observation (334 ks) of the galaxy cluster Abell 115 and detected a shock co-spatial with the radio relic. The X-ray surface brightness profile across the shock region presents a discontinuity, corresponding to a density compression factor $\\mathcal{C}=2.0\\pm0.1$ leading to a Mach number $\\mathcal{M}=1.7\\pm0.1$ ($\\mathcal{M}=1.4-2$ including systematics). Temperatures measured in the upstream and downstream regions are consistent with what expected for such a shock: $T_u=4.3^{+1.0}_{-0.6}\\:\\rm{keV}$ and $T_d=7.9^{+1.4}_{-1.1}\\:\\rm{keV}$ respectively, implying a Mach number $\\mathcal{M}=1.8^{+0.5}_{-0.4}$. So far, only few other shocks discovered in galaxy clusters are consistently detected from both density and temperature jumps. The spatial coincidence between this discontinuity and the radio relic edge strongly supports the view that shocks play a crucial role in powering these synchrotron sources. We suggest that the relic is originated by shock re-acceleration of relativistic el...

  6. Re-Acceleration Model for the "Toothbrush" Radio Relic

    Science.gov (United States)

    Kang, Hyesung

    2016-06-01

    The Toothbrush radio relic associated with the merging cluster 1RXS J060303.3 is presumed to be produced by relativistic electrons accelerated at merger-driven shocks. Since the shock Mach number inferred from the observed radio spectral index, M_{radio}≈ 2.8, is larger than that estimated from X-ray observations, M_{X}≲ 1.5, we consider the re-acceleration model in which a weak shock of M_s≈ 1.2-1.5 sweeps through the intracluster plasma with a preshock population of relativistic electrons. We find the models with a power-law momentum spectrum with the slope, s≈ 4.6, and the cutoff Lorentz factor, γ_{e,c}≈ 7-8× 10^4 can reproduce reasonably well the observed profiles of radio fluxes and integrated radio spectrum of the head portion of the Toothbrush relic.This study confirms the strong connection between the ubiquitous presence of fossil relativistic plasma originated from AGNs and the shock-acceleration model of radio relics in the intracluster medium.

  7. Relic Abundance in Secluded Dark Matter Scenario with Massive Mediator

    CERN Document Server

    Okawa, Shohei; Yamanaka, Masato

    2016-01-01

    The relic abundance of the dark matter (DM) particle $d$ is studied in a secluded DM scenario, in which the $d$ number decreasing process dominantly occurs not through the pair annihilation of $d$ into the standard model particles, but via the $dd \\to mm$ scattering process with a subsequently decaying mediator particle $m$. It is pointed out that the cosmologically observed relic abundance of DM can be accomplished even with a massive mediator having a mass $m_m$ non-negligibly heavy compared with the DM particle mass $m_d$. In the degenerated $d$-$m$ case ($m_d=m_m$), the DM relic abundance is realized by adjusting the $dd \\to mm$ scattering amplitude large enough and by choosing an appropriate mediator particle life-time. The DM evolution in the early universe exhibits characteristic "terrace" behavior, or two-step number density decreasing behavior, having a "fake" freeze-out at the first step. Based on these observations, a novel possibility of the DM model buildings is introduced in which the mediator p...

  8. Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?

    Science.gov (United States)

    Nuza, Sebastián E.; Gelszinnis, Jakob; Hoeft, Matthias; Yepes, Gustavo

    2017-09-01

    Radio relics in galaxy clusters are believed to trace merger shock fronts. If cosmological structure formation determines the luminosity, size and shape distributions of radio relics, then merger shocks need to be lighted up in a homogeneous way. We investigate if a mock relic sample, obtained from zoomed galaxy cluster simulations, is able to match the properties of relics measured in the NRAO VLA Sky Survey (NVSS). We compile a list of all radio relics known to date and homogeneously measure their parameters in all NVSS images and apply the same procedure to relics in our simulations. Number counts in the mock relic sample increase more steeply towards lower relic flux densities, suggesting an incompleteness of NVSS in this regime. Overall, we find that NVSS and mock samples show similar properties. However, large simulated relics tend to be somewhat smaller and closer to the cluster centre than observed ones. Besides this, the mock sample reproduces very well-known correlations for radio relics, in particular those relating the radio luminosity with the largest linear size and the X-ray luminosity. We show that these correlations are largely governed by the sensitivity of the NVSS observations. Mock relics show a similar orientation with respect to the direction to the cluster centre as the NVSS sample. Moreover, we find that their maximum radio luminosity roughly correlates with cluster mass, although displaying a large scatter. The overall good agreement between NVSS and the mock sample suggests that properties of radio relics are indeed governed by merger shock fronts, emitting in a homogeneous fashion. Our study demonstrates that the combination of mock observations and data from upcoming radio surveys will allow us to shed light on both the origin of radio relics and the nature of the intracluster medium.

  9. George's Complaint: Reforming the Dragon

    Science.gov (United States)

    Buxton, Bruce

    2007-01-01

    The evangelical tone and history of American culture has long been identified as a force for anti-intellectualism. The metaphors of educational reform are a demonstration of how this plays out. The very nature of the positivist social science research used to support proposed reform is anti-intellectual and feeds a debate that favors extremes over…

  10. The widest-frequency radio relic spectra: observations from 150 MHz to 30 GHz

    CERN Document Server

    Stroe, Andra; Rumsey, Clare; van Weeren, Reinout; Kierdorf, Maja; Donnert, Julius; Jones, Thomas W; Röttgering, Huub J A; Hoeft, Matthias; Rodriguez-Gonzalvez, Carmen; Harwood, Jeremy J; Saunders, Richard D E

    2015-01-01

    Radio relics are patches of diffuse synchrotron radio emission that trace shock waves. Relics are thought to form when intra-cluster medium electrons are accelerated by cluster merger induced shock waves through the diffusive shock acceleration mechanism. In this paper, we present observations spanning 150 MHz to 30 GHz of the `Sausage' and `Toothbrush' relics from the Giant Metrewave and Westerbork telescopes, the Karl G. Jansky Very Large Array, the Effelsberg telescope, the Arcminute Microkelvin Imager and Combined Array for Research in Millimeter-wave Astronomy. We detect both relics at 30 GHz, where the previous highest frequency detection was at 16 GHz. The integrated radio spectra of both sources clearly steepen above 2 GHz, at the >6$\\sigma$ significance level, supports the spectral steepening previously found in the `Sausage' and the Abell 2256 relic. Our results challenge the widely adopted simple formation mechanism of radio relics and suggest more complicated models have to be developed that, for ...

  11. Etruscan Culture Exhibition

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    EARLY this year an exhibition on the ancient civilization of Etruria was held at the Beijing-based China Millennium Monument.The theme of the exhibition was Etruscan Culture and on show were the most representative cultural and historical relics of this ancient civilization unearthed in the past 20 years. The 349 exhibits from various

  12. Another Shock for the Bullet Cluster, and the Source of Seed Electrons for Radio Relics

    Science.gov (United States)

    Shimwell, Timothy W,; Markevitch, Maxim; Brown, Shea; Feretti, Luigina; Gaensler, B. M.; Johnston-Hollitt, M.; Lage, Craig; Srinivasan, Raghav

    2015-01-01

    With Australia Telescope Compact Array observations, we detect a highly elongated Mpc-scale diffuse radio source on the eastern periphery of the Bullet cluster 1E 0657-55.8, which we argue has the positional, spectral and polarimetric characteristics of a radio relic. This powerful relic (2:30:11025 WHz(exp -1) consists of a bright northern bulb and a faint linear tail. The bulb emits 94% of the observed radio flux and has the highest surface brightness of any known relic. Exactly coincident with the linear tail we find a sharp X-ray surface brightness edge in the deep Chandra image of the cluster - a signature of a shock front in the hot intracluster medium (ICM), located on the opposite side of the cluster to the famous bow shock. This new example of an X-ray shock coincident with a relic further supports the hypothesis that shocks in the outer regions of clusters can form relics via diffusive shock (re- )acceleration. Intriguingly, our new relic suggests that seed electrons for reacceleration are coming from a local remnant of a radio galaxy, which we are lucky to catch before its complete disruption. If this scenario, in which a relic forms when a shock crosses a well-defined region of the ICM polluted with aged relativistic plasma - as opposed to the usual assumption that seeds are uniformly mixed in the ICM - is also the case for other relics, this may explain a number of peculiar properties of peripheral relics.

  13. Relic keV sterile neutrinos and reionization.

    Science.gov (United States)

    Biermann, Peter L; Kusenko, Alexander

    2006-03-10

    A sterile neutrino with a mass of several keV can account for cosmological dark matter, as well as explain the observed velocities of pulsars. We show that x rays produced by the decays of these relic sterile neutrinos can boost the production of molecular hydrogen, which can speed up the cooling of gas and the early star formation, which can, in turn, lead to a reionization of the Universe at a high enough redshift to be consistent with the Wilkinson Microwave Anisotropy Probe results.

  14. Robust Signatures of the Relic Neutrinos in CMB

    CERN Document Server

    Bashinsky, S V

    2004-01-01

    When the perturbations forming the acoustic peaks of the cosmic microwave background (CMB) reentered the horizon and interacted gravitationally with all the matter, neutrinos presumably comprised 41% of the universe energy. CMB experiments have reached a capacity to probe this background of relic neutrinos. I review the neutrino imprints on CMB anisotropy and polarization at the onset of the acoustic oscillations. The discussion addresses the underlying physics, robustness or degeneracy of the imprints with changes of free cosmological parameters, and non-minimal models for the unseen radiation sector with detectable signatures in CMB.

  15. Supernova Relic Neutrino Search at Super-Kamiokande

    CERN Document Server

    Bays, K; Abe, K; Hayato, Y; Iyogi, K; Kameda, J; Koshio, Y; Marti, L; Miura, M; Moriyama, S; Nakahata, M; Nakayama, S; Obayashi, Y; Sekiya, H; Shiozawa, M; Suzuki, Y; Takeda, A; Takenaga, Y; Ueno, K; Kajita, K Ueshima S Yamada T Yokozawa H Kaji T; Kaneyuki, K; McLachlan, T; Okumura, K; Pik, L K; Martens, K; Vagins, M; Labarga, L; Kearns, E; Litos, M; Raaf, J L; Stone, J L; Sulak, L R; Kropp, W R; Mine, S; Regis, C; Renshaw, A; Smy, M B; Sobel, H W; Ganezer, K S; Hill, J; Keig, W E; Cho, S; Jang, J S; Kim, J Y; Lim, I T; Albert, J; Scholberg, K; Walter, C W; Wendell, R; Wongjirad, T; Ishizuka, T; Tasaka, S; Learned, J G; Matsuno, S; Smith, S; Hasegawa, T; Ishida, T; Ishii, T; Kobayashi, T; Nakadaira, T; Nakamura, K; Nishikawa, K; Oyama, Y; Sakashita, K; Sekiguchi, T; Tsukamoto, T; Suzuki, A T; Takeuchi, Y; Ikeda, M; Matsuoka, K; Minamino, A; Murakami, A; Nakaya, T; Fukuda, Y; Itow, Y; Mitsuka, G; Miyake, M; Tanaka, T; Hignight, J; Imber, J; Jung, C K; Taylor, I; Yanagisawa, C; Kibayashi, A; Ishino, H; Mino, S; Sakuda, M; Mori, T; Toyota, H; Kuno, Y; Kim, S B; Yang, B S; Okazawa, H; Choi, Y; Nishijima, K; Koshiba, M; Totsuka, Y; Yokoyama, M; Heng, Y; Chen, S; Zhang, H; Yang, Z; Mijakowski, P; Connolly, K; Dziomba, M; Wilkes, R J

    2011-01-01

    A new Super-Kamiokande (SK) search for Supernova Relic Neutrinos (SRNs) was conducted using 2853 live days of data. Sensitivity is now greatly improved compared to the 2003 SK result, which placed a flux limit near many theoretical predictions. This more detailed analysis includes a variety of improvements such as increased efficiency, a lower energy threshold, and an expanded data set. New combined upper limits on SRN flux are between 2.8 and 3.0 nu_e cm^-2 s^-1 > 16 MeV total positron energy (17.3 MeV E_nu).

  16. Predicting the neutralino relic density in the MSSM more precisely

    CERN Document Server

    Harz, Julia; Klasen, Michael; Kovařík, Karol; Steppeler, Patrick

    2016-01-01

    The dark matter relic density being a powerful observable to constrain models of new physics, the recent experimental progress calls for more precise theoretical predictions. On the particle physics side, improvements are to be made in the calculation of the (co)annihilation cross-section of the dark matter particle. We present the project DM@NLO which aims at calculating the neutralino (co)annihilation cross-section in the MSSM including radiative corrections in QCD. In the present document, we briefly review selected results for different (co)annihilation processes. We then discuss the estimation of the associated theory uncertainty obtained by varying the renormalization scale. Finally, perspectives are discussed.

  17. A Search for supernova relic neutrinos at Super-Kamiokande

    Energy Technology Data Exchange (ETDEWEB)

    Iida, Takashi; Bays, Kirk, E-mail: iida@suketto.icrr.u-tokyo.ac.j [ICRR, University of Tokyo, Mozumi, Hida, Gifu (Japan)

    2010-01-01

    Supernova relic neutrinos (SRN) are the diffuse supernova neutrino background from all past supernovae. No experiment has succeeded in detecting SRN yet. Currently, the Super-Kamiokande experiment has the world's best flux upper limit of 1.2 {nu}-bar {sub e}/cm{sup 2}/sec for E{sub v} < 19.3 MeV. We have worked to improve this value by improving the data analysis. We have achieved better reduction efficiency and lowered the analysis energy threshold by developing a new spallation cut as well as optimizing other cuts.

  18. Relic Gravitational Waves and Trans-Planckian Physics

    Institute of Scientific and Technical Information of China (English)

    WU Pu-Xun; YU Hong-Wei

    2005-01-01

    @@ Assuming that the effects of trans-Planckian physics are encoded in the choice of initial conditions, mode by mode, for vacuum states at the time when its wavelength becomes equal to the scale of new physics (Planck's scale for example), we calculate the spectrum of energy densities of total relic gravitational waves from de Sitter inflation to the matter dominated universe. Our results show that the spectrum acquires corrections due to the consideration of trans-Planckian physics and these corrections depend sensitively on the vacuum state that was actually realized at the beginning of the inflation.

  19. New biflavonoids from dragon's blood of Dracaena cinnabari.

    Science.gov (United States)

    Masaoud, M; Himmelreich, U; Ripperger, H; Adam, G

    1995-08-01

    The new biflavonoids 2'-methoxysocotrin-5'-ol, socotrin-4'-ol, and homoisosocotrin-4'-ol were isolated from dragon's blood of Dracaena cinnabari and their structures elucidated mainly by NMR spectroscopy.

  20. Evaluation of Hydraulic Response of the Wave Dragon

    DEFF Research Database (Denmark)

    Frigaard, Peter; Kofoed, Jens Peter

    The present study investigates the hydraulic response of the wave energy converter Wave Dragon. This is done by peforming model tests in a wave tank in the Hydraulics & Coastal Engineering Laboratory at Aalborg University. In the model tests a floating scale model (length scale 1:50) of the Wave...... Dragon is subjected to irregular, long crested irregular and short crested sea conditions corresponding to typical situations under which the Wave Dragon will produce power. Furthermore two situations corresponding to extreme storm conditions are tested. The objective of the study is to determine...... the wave induced forces in the moorings and in the junction between the reflectors and the reservoir part, and motions of the Wave Dragon situated in different sea conditions....

  1. Dragon-kings: mechanisms, statistical methods and empirical evidence

    CERN Document Server

    Sornette, D; 10.1140/epjst/e2012-01559-5

    2012-01-01

    This introductory article presents the special Discussion and Debate volume "From black swans to dragon-kings, is there life beyond power laws?" published in Eur. Phys. J. Special Topics in May 2012. We summarize and put in perspective the contributions into three main themes: (i) mechanisms for dragon-kings, (ii) detection of dragon-kings and statistical tests and (iii) empirical evidence in a large variety of natural and social systems. Overall, we are pleased to witness significant advances both in the introduction and clarification of underlying mechanisms and in the development of novel efficient tests that demonstrate clear evidence for the presence of dragon-kings in many systems. However, this positive view should be balanced by the fact that this remains a very delicate and difficult field, if only due to the scarcity of data as well as the extraordinary important implications with respect to hazard assessment, risk control and predictability.

  2. Evaluation of Hydraulic Response of the Wave Dragon

    DEFF Research Database (Denmark)

    Frigaard, Peter; Kofoed, Jens Peter

    The present study investigates the hydraulic response of the wave energy converter Wave Dragon. This is done by peforming model tests in a wave tank in the Hydraulics & Coastal Engineering Laboratory at Aalborg University. In the model tests a floating scale model (length scale 1:50) of the Wave...... Dragon is subjected to irregular, long crested irregular and short crested sea conditions corresponding to typical situations under which the Wave Dragon will produce power. Furthermore two situations corresponding to extreme storm conditions are tested. The objective of the study is to determine...... the wave induced forces in the moorings and in the junction between the reflectors and the reservoir part, and motions of the Wave Dragon situated in different sea conditions....

  3. Dragon paves the way for new spaceflight era

    Science.gov (United States)

    Gwynne, Peter

    2012-07-01

    The success of the first private mission to the International Space Station (ISS) has opened up a new era in commercial spaceflight after SpaceX's Dragon capsule splashed down safely in the Pacific Ocean on 31 May.

  4. Dragon-Kings, Black Swans and the Prediction of Crises

    CERN Document Server

    Sornette, Didier

    2009-01-01

    We develop the concept of ``dragon-kings'' corresponding to meaningful outliers, which are found to coexist with power laws in the distributions of event sizes under a broad range of conditions in a large variety of systems. These dragon-kings reveal the existence of mechanisms of self-organization that are not apparent otherwise from the distribution of their smaller siblings. We present a generic phase diagram to explain the generation of dragon-kings and document their presence in six different examples (distribution of city sizes, distribution of acoustic emissions associated with material failure, distribution of velocity increments in hydrodynamic turbulence, distribution of financial drawdowns, distribution of the energies of epileptic seizures in humans and in model animals, distribution of the earthquake energies). We emphasize the importance of understanding dragon-kings as being often associated with a neighborhood of what can be called equivalently a phase transition, a bifurcation, a catastrophe ...

  5. Standalone visualization tool for three-dimensional DRAGON geometrical models

    Energy Technology Data Exchange (ETDEWEB)

    Lukomski, A.; McIntee, B.; Moule, D.; Nichita, E. [Faculty of Energy Systems and Nuclear Science, Univ. of Ontario Inst. of Tech., Oshawa, Ontario (Canada)

    2008-07-01

    DRAGON is a neutron transport and depletion code able to solve one-, two- and three-dimensional problems. To date DRAGON provides two visualization modules, able to represent respectively two- and three-dimensional geometries. The two-dimensional visualization module generates a postscript file, while the three dimensional visualization module generates a MATLAB M-file with instructions for drawing the tracks in the DRAGON TRACKING data structure, which implicitly provide a representation of the geometry. The current work introduces a new, standalone, tool based on the open-source Visualization Toolkit (VTK) software package which allows the visualization of three-dimensional geometrical models by reading the DRAGON GEOMETRY data structure and generating an axonometric image which can be manipulated interactively by the user. (author)

  6. Three new flavans in dragon's blood from Daemonorops draco.

    Science.gov (United States)

    Hao, Qian; Saito, Yoshinori; Matsuo, Yosuke; Li, Hai-Zhou; Takashi, Tanaka

    2015-01-01

    Three new flavans were isolated from chloroform extracts of dragon's blood from Daemonorops draco, together with eight known compounds. The structures of the new flavans were determined by 1D and 2D NMR spectroscopic analysis. These compounds are the first examples of 2-methoxyflavans from D. draco and regarded as derivatives of biogenetic intermediates from flavans to chalcones, which are characteristic of the dragon's blood.

  7. Wave Dragon Wave Energy Converters Used as Coastal Protection

    DEFF Research Database (Denmark)

    Nørgaard, Jørgen Harck; Andersen, Thomas Lykke; Kofoed, Jens Peter

    2011-01-01

    This paper deals with wave energy converters used to reduce the wave height along shorelines. For this study the Wave Dragon wave energy converter is chosen. The wave height reduction from a single device has been evaluated from physical model tests in scale 1:51.8 of the 260 x 150 m, 24 kW/m model...... Spain, to evaluate the potential for reducing wave heights close the shore by means of Wave Dragons....

  8. Simulation of the SONGS Reactor Antineutrino Flux Using DRAGON

    CERN Document Server

    Jones, C L

    2011-01-01

    For reactor antineutrino experiments, a thorough understanding of the fuel composition and isotopic evolution is of paramount importance for the extraction of $\\theta_{13}$. To accomplish these goals, we employ the deterministic lattice code DRAGON, and analyze the instantaneous antineutrino rate from the San Onofre Nuclear Generating Station (SONGS) Unit 2 reactor in California. DRAGON's ability to predict the rate for two consecutive fuel cycles is examined.

  9. On the thermal footsteps of neutralino relic gases

    Energy Technology Data Exchange (ETDEWEB)

    Cabral-Rosetti, L G [Departamento de Posgrado, Centro Interdisciplinario de Investigacion y Docencia en Educacion Tecnica (CIIDET), Av. Universidad 282 Pte., Col. Centro, A. Postal 752, C.P. 76000, Santiago de Queretaro, Qro. (Mexico); Sussman, R A [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico (ICN-UNAM). Apartado Postal 70-543, 04510 Mexico, D.F. (Mexico); Hernandez, X [Instituto de AstronomIa, Circuito de la Investigacion CientI.ca, C.U., Universidad Nacional Autnoma de Mexico (IA-UNAM). Apartado Postal 70-264, 04510 Mexico, D.F. (Mexico)

    2006-05-15

    Current literature suggests that neutralinos are the dominant cold dark matter particle species. Assuming the microcanonical definition of entropy, we examine the local entropy per particle produced between the 'freeze out' era to the present. An 'entropy consistency' criterion emerges by comparing this entropy with the entropy per particle of actual galactic structures given in terms of dynamical halo variables. We apply this criterion to the cases when neutralinos are mostly b-inos and mostly higgsinos, in conjunction with the usual 'abundance' criterion requiring that present neutralino relic density complies with 0.1 < {omega}{sub x-tilde{sup 0}{sub 1}} < 0.3 for h {approx_equal} 0.65. The joint application of both criteria reveals that a better fitting occurs for the b-ino channels, hence the latter seem to be favoured over the higgsino channels. The suggested methodology can be applied to test other annihilation channels of the neutralino, as well as other particle candidates of thermal gases relics.

  10. Effects of QCD bound states on dark matter relic abundance

    CERN Document Server

    Liew, Seng Pei

    2016-01-01

    We study scenarios where there exists an exotic massive particle charged under QCD in the early Universe. We calculate the formation and dissociation rates of bound states formed by pairs of these particles, and apply the results in dark matter (DM) coannihilation scenarios, including also the Sommerfeld effect. We find that on top of the Sommerfeld enhancement, bound-state effects can further significantly increase the largest possible DM masses which can give the observed DM relic abundance, by $\\sim 30 - 100\\%$ with respect to values obtained by considering the Sommerfeld effect only, for the color triplet or octet exotic particles we consider. In particular, it indicates that the Bino DM mass in the right-handed stop-Bino coannihilation scenario in the Minimal Supersymmetric extension of the Standard Model (MSSM) can reach $\\sim 2.5$ TeV. We also apply the bound-state effects in the calculations of relic abundance of long-lived or metastable massive colored particles, and discuss the implications on the B...

  11. Effects of QCD bound states on dark matter relic abundance

    Science.gov (United States)

    Liew, Seng Pei; Luo, Feng

    2017-02-01

    We study scenarios where there exists an exotic massive particle charged under QCD in the early Universe. We calculate the formation and dissociation rates of bound states formed by pairs of these particles, and apply the results in dark matter (DM) coannihilation scenarios, including also the Sommerfeld effect. We find that on top of the Sommerfeld enhancement, bound-state effects can further significantly increase the largest possible DM masses which can give the observed DM relic abundance, by ˜ 30-100% with respect to values obtained by considering the Sommerfeld effect only, for the color triplet or octet exotic particles we consider. In particular, it indicates that the Bino DM mass in the right-handed stop-Bino coannihilation scenario in the Minimal Supersymmetric extension of the Standard Model (MSSM) can reach ˜ 2.5 TeV, even though the potential between the stop and antistop prior to forming a bound state is repulsive. We also apply the bound-state effects in the calculations of relic abundance of long-lived or metastable massive colored particles, and discuss the implications on the BBN constraints and the abundance of a super-weakly interacting DM. The corrections for the bound-state effect when the exotic massive colored particles also carry electric charges, and the collider bounds are also discussed.

  12. On the thermal footsteps of Neutralino relic gases

    CERN Document Server

    Cabral-Rosetti, L G; Sussman, R A; Cabral-Rosetti, Luis G.; Hernández, Xabier; Sussman, Roberto A.

    2006-01-01

    Current literature suggests that neutralinos are the dominant cold dark matter particle species. Assuming the microcanonical definition of entropy, we examine the local entropy per particle produced between the ``freeze out'' era to the present. An ``entropy consistency'' criterion emerges by comparing this entropy with the entropy per particle of actual galactic structures given in terms of dynamical halo variables. We apply this criterion to the cases when neutralinos are mosly b-inos and mostly higgsinos, in conjunction with the usual ``abundance'' criterion requiring that present neutralino relic density complies with $0.1 < \\Omega_{\\chic{\\tilde\\chi^0_1}} < 0.3$ for $h\\simeq 0.65$. The joint application of both criteria reveals that a better fitting occurs for the b-ino channels, hence the latter seem to be favoured over the higgsino channels. The suggested methodology can be applied to test other annihilation channels of the neutralino, as well as other particle candidates of thermal gases relics.

  13. Re-Acceleration Model for the "Sausage" Radio Relic

    Science.gov (United States)

    Kang, Hyesung

    2016-08-01

    The Sausage radio relic is the arc-like radio structure in the cluster CIZA J2242.8+5301, whose observed properties can be best understood by synchrotron emission from relativistic electrons accelerated at a merger-driven shock.However, there remain a few puzzles that cannot be explained by the shock acceleration model with only in-situ injection. In particular, the Mach number inferred from the observed radio spectral index, M_{radio}≈ 4.6, while the Mach number estimated from X-ray observations, M_{X-ray}≈ 2.7. In an attempt to resolve such a discrepancy, here we consider the re-acceleration model in which a shock of M_s≈ 3 sweeps through the intracluster gas with a pre-existing population of relativistic electrons. We find that observed brightness profiles at multi frequencies provide strong constraints on the spectral shape of pre-existing electrons. The models with a power-law momentum spectrum with the slope, s≈ 4.1, and the cutoff Lorentz factor, γ_{e,c}≈ 3-5× 10^4, can reproduce reasonably well the observed spatial profiles of radio fluxes and integrated radio spectrum of the Sausage relic.The possible origins of such relativistic electrons in the intracluster medium remain to be investigated further.

  14. 村寨传统体育生存的文化生态学分析--对龙潭镇部分村寨传统龙灯舞的田野调查报告%Analysis on the Cultural Ecology of the Survival of Traditional Sports in Villages---Field Survey Report on Traditional Dragon Lantern Dance in Part of the Villages in Longtan Town

    Institute of Scientific and Technical Information of China (English)

    陶坤; 屈杰; 唐宁潇; 谢昊霖

    2015-01-01

    Based on the cultural ecological theory and the paradigm of qualitative research , the article adopts field research method to study the traditional dragon lantern dance in some parts of the villages in Longtan Town , Xupu County . The result shows that as the traditional culture event in villages , “Traditional Dragon Lantern Dance” in the process of its own occurrence and development is impacted by the regional natural environment , social environment and social economic environment , as well as the native people's traditional moral concept . At the same time , the current inheritance encounters cultural ecological dilemmas , such as the constantly drain of participants , the impact of the diversification of modern entertainment , the absence of traditional values and the changes of the rural economy structure . It reflects the survival path and the development dilemma of traditional sports in villages of our country .%以文化生态学为理论支撑,以质的研究为范式,采用田野调查方法,对溆浦县龙潭镇部分村寨的传统龙灯舞活动进行调查研究。研究结果表明:作为村寨传统文化事项的“传统龙灯舞”,在自身的发生、发展过程中受到本区域自然环境、社会制度环境、社会经济环境和本族群众传统道德观念的影响,同时在当下的传承存在参与人员的不断流失、现代娱乐方式多样化的冲击、传统价值观念的缺位以及农村经济结构的变迁等文化生态困境,并折射出我国村寨传统体育的生存路径和发展困境。

  15. The death of FRII radio sources and their connection with radio relics

    CERN Document Server

    Kaiser, C R; Kaiser, Christian R.; Cotter, Garret

    2002-01-01

    Radio relic sources in galaxy clusters are often described as the remnants of powerful radio galaxies. Here we develop a model for the evolution of such relics after the jets cease to supply energy to the lobes. This includes the treatment of a relic overpressured with respect to its gaseous surroundings even after the jets switch off. We also determine the radio emission of relics for a large variety of assumptions. We take into account the evolution of the strength of the magnetic field during the phase of relativistic particle injection into the lobes. The resulting spectra show mild steepening at around 1 GHz but avoid any exponential spectral cut-offs. The model calculations are used to fit the observed spectra of six radio relics. The quality of the fits is excellent for {\\it all} models discussed. Unfortunately, this implies that it is virtually impossible to determine any of the important source parameters from the observed radio emission alone.

  16. Double Relics in the Outskirts of A3376: Accretion Flows Meet Merger Shocks?

    Indian Academy of Sciences (India)

    Ruta Kale; K. S. Dwarakanath; Joydeep Bagchi; Surajit Paul

    2011-12-01

    The case of spectacular ring-like double radio relics in the merging, rich galaxy cluster A3376 is of great interest to study non-thermal phenomena at cluster outskirts.We present the first low frequency (330 and 150 MHz) images of the double relics using the GMRT. With our GMRT 330 MHz map and the VLA 1400 MHz map (Bagchi et al. 2006), we have constructed and analyzed the distribution of spectral indices over the radio relics. We find flat spectral indices at the outer edges of both the relics and a gradual steepening of spectral indices toward the inner regions. This supports the model of outgoing merger shock waves. The eastern relic has a complex morphology and spectral index distribution toward the inner region. This will be discussed in the context of the effect of large-scale accretion flows on the outgoing merger shocks as reported in the recent simulations.

  17. Utilization of Electromagnetic Detector for Selection and Detection of High-Frequency Relic Gravitational Waves

    Institute of Scientific and Technical Information of China (English)

    LI Fang-Yu; CHEN Zhen-Ya; YI Ying

    2005-01-01

    @@ It is shown that the coupling system between fractal membranes and a Gaussian beam passing through a static magnetic field has strong selection capability for the stochastic relic gravitational wave (GW) background. The relic G W components propagating along the positive direction of the symmetrical axis of the Gaussian beam might generate an optimal electromagnetic perturbation, while the perturbation produced by the relic GW components propagating along the negative and perpendicular directions to the symmetrical axis will be much less than the former, and the influence of the random fluctuation of the relic GWs to such effect can be neglected. The high-frequency relic GWs satisfying the parameters requirement (h ~ 10-31 or larger), frequency resonance and "direction coupling", in principle, would be selectable and measurable in seconds.

  18. Primitive environment control for preservation of pit relics in archeology museums of China.

    Science.gov (United States)

    Gu, Zhaolin; Luo, Xilian; Meng, Xiangzhao; Wang, Zanshe; Ma, Tao; Yu, Chuck; Rong, Bo; Li, Ku; Li, Wenwu; Tan, Ying

    2013-02-01

    Immovable historical relics in some archeology museums of China suffer deterioration due to their improper preservation environment. The existing environmental control systems used in archeology museums are often designed for the amenities of visitors, and these manipulated environments are often inappropriate for the conservation of abiotic relics. This paper points out that the large open space of the existing archeology museum could be a cause of deterioration of the relics from the point of view of indoor air convective flow. The paper illustrates the need to introduce a local pit environmental control, which could reintegrate a pit primitive environment for the preservation of the historical relics by using an air curtain system, orientated to isolate the unearthed relics, semiexposed in pits to the large gallery open space of the exhibition hall.

  19. Hydraulic Response of the Wave Energy Converter Wave Dragon in Nissum Bredning

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter

    This report deals with the hydraulic performance of the wave energy converter Wave Dragon, Nissum Bredning prototype.......This report deals with the hydraulic performance of the wave energy converter Wave Dragon, Nissum Bredning prototype....

  20. Dragon Kilns" in Chaozhou%对潮州“龙窑”的探讨

    Institute of Scientific and Technical Information of China (English)

    林高翥

    2012-01-01

    龙窑是优良古窑种之一,潮州龙窑在潮州陶瓷文化占据很重要的位置,并在潮州地区广泛分布。其传统的生产工艺,特别是烧成过程的一些特性,是历代陶瓷窑炉技术改造的基础,可以说,潮州历代陶瓷业的发展,潮州龙窑功不可没。%Dragon kilns, a type of ancient kilns, widely distributed in and around Chaozhou, have claimed an important position in the ceramic culture of this area. Their production technology, especially their firing techniques, laid the foundation for the development of ceramic kilns in different dynasties. Literally, prosperity of ceramic industry in Chaozhou throughout the history owes a great debt to Chaozhou dragon kilns.

  1. Deep fungal dermatitis caused by the Chrysosporium anamorph of Nannizziopsis vriesii in captive coastal bearded dragons (Pogona barbata).

    Science.gov (United States)

    Johnson, R S P; Sangster, C R; Sigler, L; Hambleton, S; Paré, J A

    2011-12-01

    Deep fungal dermatitis caused by the Chrysosporium anamorph of Nannizziopsis vriesii (CANV) was diagnosed in a group of coastal bearded dragons (Pogona barbata). The outbreak extended over a 6-month period, with four of six lizards from the same zoological outdoor enclosure succumbing to infection. A fifth case of dermatomycosis was identified in a pet lizard originally sourced from the wild. Diagnosis of infection with the CANV was based on similar clinical signs and histopathology in all animals and confirmed by culture and sequencing of the fungus from one animal. This is the first report of the CANV causing disease in a terrestrial reptile species in Australia and the first in the coastal bearded dragon. © 2011 The Authors. Australian Veterinary Journal © 2011 Australian Veterinary Association.

  2. Dermatomycosis in a pet inland bearded dragon (Pogona vitticeps) caused by a Chrysosporium species related to Nannizziopsis vriesii.

    Science.gov (United States)

    Abarca, M L; Martorell, J; Castellá, G; Ramis, A; Cabañes, F J

    2009-08-01

    A Chrysosporium sp. related to Nannizziopsis vriesii was isolated in pure culture from squames and biopsies of facial lesions in a pet inland bearded dragon (Pogona vitticeps) in Spain. The presence in histological sections of morphologically consistent fungal elements strongly incriminates this fungus as the aetiological agent of infection. Lesions regressed following treatment with oral ketoconazole and topical chlorhexidine and terbinafine until the lizard was lost to follow up 1 month later. The ITS-5.8S rRNA gene of the isolate was sequenced and a search on the GenBank database revealed a high match with the sequences of two Chrysosporium sp. strains recently isolated from green iguanas (Iguana iguana) with dermatomycosis, also in Spain. Phylogenetic analysis of the sequences revealed that all these strains are related to N. vriesii. This is the first report of dermatomycoses caused by a Chrysosporium species related to N. vriesii in a bearded dragon outside North America.

  3. Toxic leucoencephalopathy after 'chasing the dragon'.

    Science.gov (United States)

    Singh, Rajinder; Saini, Monica

    2015-06-01

    Toxic leucoencephalopathy (TLE) is a rare neurological complication of heroin abuse. 'Chasing the dragon' is an inhalational mode of heroin abuse that originated in Southeast Asia. Intriguingly, no cases of TLE have been reported from this region, although the inhalational mode of heroin abuse is common. We herein report the case of a middle-aged man with a history of polysubstance abuse who presented with progressive neurological symptoms and progressed to an uncommunicative state. While the initial impression was that of iatrogenic parkinsonism, diffuse leucoencephalopathy with sparing of the cerebellum was noted on magnetic resonance imaging. In view of his history of inhalational heroin abuse close to the onset of the neurological symptoms, a diagnosis of TLE was made. No clinical improvement was noted with administration of a dopaminergic agent. This is the first known case of delayed TLE following heroin inhalation from Southeast Asia with the unusual feature of cerebellar sparing.

  4. Predictors of telomere content in dragon lizards

    Science.gov (United States)

    Ballen, Cissy; Healey, Mo; Wilson, Mark; Tobler, Michael; Olsson, Mats

    2012-08-01

    Telomeres shorten as a consequence of DNA replication, in particular in cells with low production of telomerase and perhaps in response to physiological stress from exposure to reactive oxygen species, such as superoxide. This process of telomere attrition is countered by innate antioxidation, such as via the production of superoxide dismutase. We studied the inheritance of telomere length in the Australian painted dragon lizard ( Ctenophorus pictus) and the extent to which telomere length covaries with mass-corrected maternal reproductive investment, which reflects the level of circulating yolk precursor and antioxidant, vitellogenin. Our predictors of offspring telomere length explained 72 % of telomere variation (including interstitial telomeres if such are present). Maternal telomere length and reproductive investment were positively influencing offspring telomere length in our analyses, whereas flow cytometry-estimated superoxide level was negatively impacting offspring telomere length. We suggest that the effects of superoxide on hatchling telomere shortening may be partly balanced by transgenerational effects of vitellogenin antioxidation.

  5. 南舟北移背景下京杭运河城市龙舟品牌赛事发展研究%On the dragon boat brand development with the background of Southern boats expanding North

    Institute of Scientific and Technical Information of China (English)

    张永虎

    2015-01-01

    Southern boats expanding north is the most powerful measure to prompt the development of dragon boats in China.Regarding canal city's dragon boat races as the research object,using the method of literature,field survey and interview,the dragon boat competition's situation,characteristics and existing problems are analyzed.By using the SWOT analysis theory,based on the research of its superiorities,weaknesses,opportunities and threats to develop the dragon boat brand competition,the development strategy of the dragon boat brand competition is put forward,specifically including:spread the dragon boat sports events and inherit and innovate dragon boating culture;perfect the mechanism and implement the commercial operation;rise the intensity of colleges and universities'races and make the dragon boat culture research;hold the canal city dragon boat club's super league competition,build the brand and so on,in order to further promote China's Dragon Boat Sport healthy and orderly development.%“南舟北移”成为驱动我国龙舟项目普及发展最强有力的举措。以京杭运河城市龙舟赛事为研究对象,运用文献资料、田野调查和访谈法,对当今龙舟赛事现状、特性和存在的问题进行了分析。借用SWOT分析理论,在对发展龙舟品牌赛事面临的优势、劣势、机遇和威胁进行研究的基础上,提出龙舟品牌赛事的开发策略,具体包括:推广龙舟运动,传承与创新龙舟文化;健全机制,实施商业化运作;推进高校龙舟开展力度,做好龙舟文化研究;举办运河城市龙舟俱乐部超级联赛,打造赛事品牌等,力求推动我国龙舟运动健康有序发展。

  6. 76 FR 27284 - Special Local Regulation; Partnership in Education, Dragon Boat Race; Maumee River, Toledo, OH

    Science.gov (United States)

    2011-05-11

    ..., Dragon Boat Race; Maumee River, Toledo, OH AGENCY: Coast Guard, DHS. ACTION: Notice of proposed... during the Dragon Boat Races which take place during the third or fourth weekend in July each year. This... from other vessel traffic. The Captain of the Port Detroit has determined dragon boat races in...

  7. 77 FR 55436 - Special Local Regulation; Partnership in Education, Dragon Boat Race; Maumee River, Toledo, OH

    Science.gov (United States)

    2012-09-10

    ..., Dragon Boat Race; Maumee River, Toledo, OH AGENCY: Coast Guard, DHS. ACTION: Notice of proposed... River during the annual Dragon Boat Races. This special local regulated area is necessary to protect... Regulation; Partnership in Education Dragon Boat Race, Maumee River Toledo, OH in the Federal...

  8. Imprints of relic gravitational waves on pulsar timing

    CERN Document Server

    Tong, Ming-Lei; Zhao, Cheng-Shi; Gao, Feng; Yan, Bao-Rong; Yang, Ting-Gao; Gao, Yu-Ping

    2015-01-01

    Relic gravitational waves (RGWs) , a background originated during inflation, would give imprints on the pulsar timing residuals. This makes RGWs be one of important sources for detection using the method of pulsar timing. In this paper, we discuss the effects of RGWs on the single pulsar timing, and give quantitively the timing residuals caused by RGWs with different model parameters. In principle, if the RGWs are strong enough today, they can be detected by timing a single millisecond pulsar with high precision after the intrinsic red noise in pulsar timing residuals were understood, even though observing simultaneously multiple millisecond pulsars is a more powerful technique in extracting gravitational wave signals. We corrected the normalization of RGWs using observations of the cosmic microwave background (CMB), which leads to the amplitudes of RGWs being reduced by two orders of magnitude or so compared to our previous works. We made new constraints on RGWs using the recent observations from the Parkes ...

  9. Neutralino relic density from ILC measurements in the CPV MSSM

    CERN Document Server

    Bélanger, G; Kraml, Sabine; Martyn, H -U; Pukhov, A

    2008-01-01

    We discuss ILC measurements for a specific MSSM scenario with CP phases, where the lightest neutralino is a good candidate for dark matter, annihilating efficiently through t-channel exchange of light staus. These prospective (CP-even) ILC measurements are then used to fit the underlying model parameters. A collider prediction of the relic density of the neutralino from this fit gives 0.116

  10. Relic density computations at NLO: infrared finiteness and thermal correction

    CERN Document Server

    Beneke, Martin; Hryczuk, Andrzej

    2014-01-01

    There is an increasing interest in accurate dark matter relic density predictions, which requires next-to-leading order (NLO) calculations. The method applied up to now uses zero-temperature NLO calculations of annihilation cross sections in the standard Boltzmann equation for freeze-out, and is conceptually problematic, since it ignores the finite-temperature infrared (IR) divergences from soft and collinear radiation and virtual effects. We address this problem systematically by starting from non-equilibrium quantum field theory, and demonstrate on a realistic model that soft and collinear temperature-dependent divergences cancel in the collision term. Our analysis provides justification for the use of the freeze-out equation in its conventional form and determines the leading finite-temperature correction to the annihilation cross section. This turns out to have a remarkably simple structure.

  11. Relic density of dark matter in the NMSSM

    CERN Document Server

    Bélanger, G; Hugonie, C; Pukhov, A E; Semenov, A

    2005-01-01

    We present a code to compute the relic density of dark matter in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Dominant corrections to the Higgs masses are calculated with NMHDECAY as well as theoretical and collider constraints. All neutralino annihilation and coannihilation processes are then computed with an extended version of micrOMEGAs, taking into acount higher order corrections to Higgs vertices. We explore the parameter space of the NMSSM and consider in particular the case of a bino LSP, of a mixed bino-higgsino LSP and of a singlino LSP. As compared to the MSSM, neutralino annihilation is often more efficient as it can take place via (additional) Higgs resonances as well as annihilation into light Higgs states. Models with a large singlino component can be compatible with WMAP constraints.

  12. Underground Searches for Cold Relics of the Early Universe

    CERN Document Server

    Baudis, L

    2005-01-01

    We have strong evidence on all cosmic scales, from galaxies to the largest structures ever observed, that there is more matter in the universe than we can see. Galaxies and clusters would fly apart unless they would be held together by material which we call dark, because it does not shine in photons. Although the amount of dark matter and its distribution are fairly well established, we are clueless regarding its composition. Leading candidates are Weakly Interacting Massive Particles (WIMPs), which are 'cold' thermal relics of the Big Bang, ie moving non-relativistically at the time of structure formation. These particles can be detected via their interaction with nuclei in deep-underground, low-background detectors. Experiments dedicated to observe WIMP interactions for the first time reach sensitivities allowing to probe the parameter space predicted by supersymmetric theories of particle physics. Current results of high sensitivity direct detection experiments are discussed and the most promising project...

  13. Galactic abundances as a relic neutrino detection scheme

    DEFF Research Database (Denmark)

    Riis, Anna Sejersen; Thomas Zinner, Nikolaj; Hannestad, Steen

    2011-01-01

    We propose to use the threshold-free process of neutrino capture on beta-decaying nuclei (NCB) using all available candidate nuclei in the Milky Way as target material in order to detect the presence of the Cosmic neutrino background. By integrating over the lifetime of the galaxy one might be able....... Secondly, relic neutrinos have so low energy that their de Broglie wavelengths are macroscopic and they may therefore scatter coherently on the electronic cloud of the candidate atoms. One must therefore compare the cross sections for the two processes (induced beta-decay by neutrino capture, and coherent...... scattering of the neutrinos on atomic nuclei) before drawing any conclusions. Finally, the density of target nuclei in the galaxy must be calculated. We assume supernovae as the only production source and approximate the neutrino density as a homogenous background. Here we perform the full calculation...

  14. Neutralino Relic Density in a Supersymmetric U(1)' Model

    CERN Document Server

    Barger, V; Langacker, P; Lee, H S; Barger, Vernon; Kao, Chung; Langacker, Paul; Lee, Hye-Sung

    2004-01-01

    We study properties of the lightest neutralino (\\chi) and calculate its cosmological relic density in a supersymmetric U(1)' model with a secluded U(1)' breaking sector (the S-model). The lightest neutralino mass is smaller than in the minimal supersymmetric standard model; for instance, m_\\chi < 100 GeV in the limit that the U(1)' gaugino mass is large compared to the electroweak scale. We find that the Z-\\chi-\\chi coupling can be enhanced due to the singlino components in the extended neutralino sector. Neutralino annihilation through the Z-resonance then reproduces the measured cold dark matter density over broad regions of the model parameter space.

  15. Shock acceleration as origin of the radio relic in A521?

    CERN Document Server

    Giacintucci, S; Macario, G; Dallacasa, D; Brunetti, G; Markevitch, M; Cassano, R; Bardelli, S; Athreya, R

    2008-01-01

    We present new high sensitivity observations of the radio relic in A521 carried out with the Giant Metrewave Radio Telescope at 327 MHz and with the Very Large Array at 4.9 and 8.5 GHz. We imaged the relic at these frequencies and carried out a detailed spectral analysis, based on the integrated radio spectrum between 235 MHz and 4.9 GHz, and on the spectral index image in the frequency range 327-610 MHz. To this aim we used the new GMRT observations and other proprietary as well as archival data. We also searched for a possible shock front co-located with the relic on a short archival Chandra X-ray observation of the cluster. The integrated spectrum of the relic is consistent with a single power law; the spectral index image shows a clear trend of steepening going from the outer portion of the relic toward the cluster centre. We discuss the origin of the source in the light of the theoretical models for the formation of cluster radio relics. Our results on the spectral properties of the relic are consistent ...

  16. AGN duty cycle and relic emission in the low frequency sky

    Science.gov (United States)

    Pandey-Pommier, M.; Intema, H.; Heald, G.

    2016-12-01

    Active Galactic Nuclei (AGNs) are amongst the brightest sources in the radio sky that deposit large amount of energy in the interstellar and intergalactic medium (ISM, IGM) via their jets. Recurrent flaring episodes in the AGN jets can terminate at large-scale faint diffuse 'relic' emission around them. These relic emissions are rare and represent the end stage of their life cycle. They show very steep spectrum giving insights of AGN duty cycle, their past activity history and surrounding environment properties. High sensitivity and arcsec scale observations at very low frequencies are needed to detect such rare relic emission and disentangle the details of their morphology. In this paper we highlight the important database provided by low frequency surveys to search for relic radio sources and discuss in particular the relic emission from the AGNs detected in the LOFAR Multi frequency Snapshot Sky Survey (MSSS) and TIFR GMRT Sky Survey (TGSS), both surveys performed with SKA pathfinder telescopes. The radio spectrum from 2 different types of relic radio galaxies (B2 0924+30 and 4C 35.06) are investigated and a correlation between the mean particle age of the relic emission and the central AGN properties is derived.

  17. SpaceX's Dragon America's next generation spacecraft

    CERN Document Server

    Seedhouse, Erik

    2016-01-01

    This book describes Dragon V2, a futuristic vehicle that not only provides a means for NASA to transport its astronauts to the orbiting outpost but also advances SpaceX’s core objective of reusability. A direct descendant of Dragon, Dragon V2 can be retrieved, refurbished and re-launched. It is a spacecraft with the potential to completely revolutionize the economics of an industry where equipment costing hundreds of millions of dollars is routinely discarded after a single use. It was presented by SpaceX CEO Elon Musk in May 2014 as the spaceship that will carry NASA astronauts to the International Space Station as soon as 2016 SpaceX’s Dragon – America’s Next Generation Spacecraft describes the extraordinary feats of engineering and human achievement that have placed this revolutionary spacecraft at the forefront of the launch industry and positioned it as the precursor for ultimately transporting humans to Mars. It describes the design and development of Dragon, provides mission highlights of the f...

  18. DRAGONS - A Micrometeoroid and Orbital Debris Impact Sensor

    Science.gov (United States)

    Liou, J. -C.; Corsaro, R.; Giovane, F.; Anderson, C.; Sadilek, A.; Burchell, M.; Hamilton, J.

    2015-01-01

    The Debris Resistive/Acoustic Grid Orbital Navy-NASA Sensor (DRAGONS) is intended to be a large area impact sensor for in situ measurements of micrometeoroids and orbital debris (MMOD) in the millimeter or smaller size regime. These MMOD particles are too small to be detected by ground-based radars and optical telescopes, but are still large enough to be a serious safety concern for human space activities and robotic missions in the low Earth orbit (LEO) region. The nominal detection area of a DRAGONS unit is 1 m2, consisting of several independently operated panels. The approach of the DRAGONS design is to combine different particle impact detection principles to maximize information that can be extracted from detected events. After more than 10 years of concept and technology development, a 1 m2 DRAGONS system has been selected for deployment on the International Space Station (ISS) in August 2016. The project team achieved a major milestone when the Preliminary Design Review (PDR) was completed in May 2015. Once deployed on the ISS, this multi-year mission will provide a unique opportunity to demonstrate the MMOD detection capability of the DRAGONS technologies and to collect data to better define the small MMOD environment at the ISS altitude.

  19. Rescuing Yushu's Culture

    Institute of Scientific and Technical Information of China (English)

    YIN PUMIN

    2010-01-01

    @@ Besides leaving at least 2,600 people dead and more than 100,000homeless,the 7.1-magnitude earthquake,which jolted the Yushu Tibetan Autonomous Prefecture in northwest China's Qinghai Province on April 14,2010,seriously damaged large numbers of the area's cultural relics.

  20. Interplay of gaugino (co)annihilation processes in the context of a precise relic density calculation

    CERN Document Server

    Harz, Julia; Klasen, Michael; Kovařík, Karol; Steppeler, Patrick

    2015-01-01

    The latest Planck data allow one to determine the dark matter relic density with previously unparalleled precision. In order to achieve a comparable precision on the theory side, we have calculated the full $\\mathcal{O}(\\alpha_s)$ corrections to the most relevant annihilation and coannihilation processes for relic density calculations within the Minimal Supersymmetric Standard Model (MSSM). The interplay of these processes is discussed. The impact of the radiative corrections on the resulting relic density is found to be larger than the experimental uncertainty of the Planck data.

  1. [Xinmi, the cradle of TCM culture].

    Science.gov (United States)

    Zheng, Guanzhou

    2011-05-01

    As recorded in the history, Xinmi was surrounded by mountains and near Zhen and Wei rivers, where was of a very good living environment for ancient human being. Historical records and relics showed a successive development of culture from the period of three emperors, five kings to Xia, Shang and Zhou Dynasties. Nowadays, historical relics of medical saints in terms of Huangdi, Qibo, Fuxi, Leigong were preserved. So Xinmi can be called the cradle of TCM.

  2. The wave dragon. Now ready for test in real sea

    Energy Technology Data Exchange (ETDEWEB)

    Soerensen, H..; Hansen, R.; Friis-Madsen, E. (and others)

    2001-07-01

    The Wave Dragon is an offshore wave energy converter of the overtopping type, utilizing a patented wave reflector design to focus the waves towards a ramp, and the overtopping is used for electricity production through a set of Kaplan/propeller hydro turbines. During the last 2 years, excessive design and testing has been performed on a scale 1:50 model of the Wave Dragon, and on a scale 1:3.5 model turbine. The survivability, overtopping, hydraulic response, turbine performance and feasibility have been verified. Furthermore regulation strategy, grid connection technology, generator technology, and mooring systems have been accommodated to the Wave Dragon. The main conclusions from this work are elaborated, and the future plans for, and expectations to, the technology is described. (au)

  3. Gilded Silver Crown with Double-dragon Pattern

    Institute of Scientific and Technical Information of China (English)

    1996-01-01

    Unearthed from a Liao tomb at Zhangjia Yingzi, Jianping County, Liaoning Province in 1956, this gilded silver crown with double-dragon pattern is 19 cm high and 20.9 cm in diameter. Its shape is suggestive of a mountain: higher in the middle and lower on both sides. On the front is a carving in the shape of a pearl surrounded by an S-shape pattern symbolizing good fortune. There is a lively dragon on either side. The complete design is based on the old theme "two dragons play with a pearl." Traditions of the Qidan, an ancient nationality of northern China, are evident in the design of the crown. It is recorded in

  4. Chemotherapeutic treatment for leukemia in a bearded dragon (Pogona vitticeps).

    Science.gov (United States)

    Jankowski, Gwen; Sirninger, Jeffrey; Borne, Jessica; Nevarez, Javier G

    2011-06-01

    A 4.5-yr-old, captive-bred, male bearded dragon (Pogona vitticeps) presented for lethargy, anorexia, and increased mucoid salivation with upper respiratory clicks. Diagnostics were declined and the bearded dragon was prescribed ceftazidime 20 mg/kg i.m. q 72 hr. The patient presented again 1 wk later with a marked monocytosis, heterophilia, and lymphocytosis, and a clinical diagnosis of chronic monocytic leukemia was made. Chemotherapy with cytosine arabinoside (100 mg/m2 over 48 hr i.v.) was initiated. Forty-four hours into the treatment the dragon became acutely unresponsive and died within 1 hr. Adverse effects as a result of i.v. cytosine arabinoside therapy were not identified despite previous reports suggestive that the drug induces renal failure.

  5. Evaluation of hydraulic response of the Wave Dragon

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-02-01

    The present study investigates the hydraulic response of the wave energy converter Wave Dragon. This is done by performing model tests in a wave tank in the Hydraulics and Coastal Engineering Laboratory at Aalborg University. In the model tests a floating scale model (length scale 1:50) of the Wave Dragon is subjected to irregular long crested irregular and short crested sea conditions corresponding to typical situations under which the Wave Dragon will produce power. Furthermore two situations corresponding to extreme storm conditions are tested. The objective of the study is to determine the wave induced forces in the moorings and in the junction between the reflectors and the reservoir part, and motions of the Wave Dragon situated in different sea conditions. On the background of the performed model tests and evaluation of the investigated concept is given. The floating model of Wave Dragon demonstrated a good behaviour and was able to collect water in all sea conditions. Motions in seas with up to 5 m significant wave height were reasonable. Though, the heave motion and the pitch motion seemed to be rather large. wave Dragon survived tests in very severe sea conditions with significant wave heights between 10 m and 15 m. This was the case for long crested waves and short crested as well. Some problems were seen while adjusting the crest freeboard to the different sea conditions. The maximum force in the instrumented junction between the reflector and the reservoir part was found to be approximately 30 MN (3.000 ton). Maximum forces in the mooring system were found to be 20 MN, 30 MN and 140 MN, respectively, giving stresses in the order of 1.000 MPa to 4.000 MPa in the pre-designed wires. (au)

  6. Gastric neuroendocrine carcinomas in bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Ritter, J M; Garner, M M; Chilton, J A; Jacobson, E R; Kiupel, M

    2009-11-01

    This article describes a newly recognized highly malignant neoplastic entity in young bearded dragons (Pogona vitticeps), gastric neuroendocrine carcinomas, which readily metastasize. Ten bearded dragons with histories of anorexia (8), vomiting (3), hyperglycemia (2), and anemia (3) were included in this study. All animals had neoplastic masses in their stomach, with metastasis to the liver. Microscopically, 6 of these neuroendocrine carcinomas were well-differentiated and 4 were poorly differentiated. For further characterization, immunohistochemistry for protein gene product 9.5, neuron-specific enolase, endorphin, chromogranins A and B, synaptophysin, somatostatin, insulin, glucagon, gastrin, pancreatic polypeptide, and vasoactive intestinal peptide was performed on 5 animals. Because only immunolabeling for somatostatin was consistently observed in all neoplasms, a diagnosis of somatostatinoma was made for these 5 bearded dragons. Some neoplasms also exhibited multihormonal expression. Electron microscopy performed on 1 tumor confirmed the presence of neuroendocrine granules within neoplastic cells. Gastric neuroendocrine carcinomas, and specifically somatostatinomas, have not been previously reported in bearded dragons, or other reptiles, and may be underdiagnosed due to inconsistent, ambiguous clinical signs. In humans, pancreatic somatostatinomas are associated with a syndrome of hypersomatostatinemia, which includes hyperglycemia, weight loss, and anemia, as observed in some of these bearded dragons. Somatostatinomas in humans are commonly associated with neurofibromatosis type 1 (Von Recklinghausen's disease), caused by a mutation in the tumor suppressor gene NF1, which results in decreased expression of neurofibromin. In all 5 animals examined, neoplasms exhibited decreased neurofibromin expression compared with control tissues, suggesting that decreased functional neurofibromin may play a role in the pathogenesis of somatostatinomas in bearded dragons.

  7. Study on the Mode of Development and Utilization of Underground Space in Relic Museum Architecture%遗址博物馆建筑地下空间开发利用模式探讨

    Institute of Scientific and Technical Information of China (English)

    杨红禹; 张平; 陈志龙

    2012-01-01

    The protection of cultural relic site is an essential quality in modem society. Due to the immovability of the relic museum site, any attempt to exhibit the site will require the covered underground space to be dug out and recovered to its original appearance. Based on the characteristic of relic museum structure, by case analyzing of typical domestic and foreign museums, the authors explained the advantage of underground space exploration of such relic museum sites and suggested their running pattern. Especially in China, the heritage attraction is numerous, from the point of view of protecting historical relics and historical land sector, the prospects for development and utilization of underground space at historical relic ruins are broad.%遗址文物保护的观念是现代人的基本素质.地下遗址的不可移动性使得遗址博物馆在展出这类遗址时,必须开挖已被添没的地下空间,恢复原有的地下空间以展示遗址.文章以遗址博物馆建筑特点为依据,阐述了地下空间开发在遗址博物馆建筑中的优势,并通过对国内外具有代表性遗址博物馆实例分析,提出了遗址博物馆地下空间开发利用模式.我国文物古迹众多,从保护历史文物和历史地段风貌的角度,历史文物遗址的地下空间开发利用发展前景广阔.

  8. Ranavirus in an outbreak of dermatophilosis in captive inland bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Tamukai, Kenichi; Tokiwa, Toshihiro; Kobayashi, Hideki; Une, Yumi

    2016-04-01

    Various pathogens cause skin diseases in lizards. An outbreak of skin disease occurred in a population of 100 inland bearded dragons at a breeding facility in Japan; 50 developed skin lesions and 15 mortalities were reported. To identify the pathogens responsible for the skin lesions and to determine the cause of death. Eight specimens (three dead, two euthanized, three living) were randomly selected from a group of inland bearded dragons with skin lesions consisting of multifocal superficial dermatitis. Biopsy samples were taken from skin lesions and healthy skin of the live specimens. Postmortem examinations were performed on the dead and euthanized specimens. Skin samples were processed for microbiological culture, 16S ribosomal DNA (rDNA) sequencing for bacteria, ranavirus major capsid protein (MCP) gene sequencing and histopathological examination. Histopathological examinations were also performed on postmortem tissue samples. Both Austwickia chelonae and ranavirus (DNA) were detected in the skin lesions. Pathological examination revealed no significant visceral lesions caused by A. chelonae or ranavirus infection in dead specimens. To the best of the authors' knowledge this is the first report of dermatophilosis due to A. chelonae infection in lizards and the first description of a concurrent infection with a ranavirus. The combined infection associated with the skin lesions may have been the primary cause of death. Co-infection with a ranavirus should be considered as a possible factor in cases of reptilian dermatophilosis. © 2016 ESVD and ACVD.

  9. Testing, Analysis and Control of Wave Dragon, Wave Energy Converter

    DEFF Research Database (Denmark)

    Tedd, James

    of a textbook, a submitted journal paper and three peer-reviewed conference papers. The content can be broadly divided into four topics: experiences gained with the Wave Dragon prototype device; power-production verification; overtopping analysis; and improvements in control. A comprehensive record...... the expected performance. Other sources of generation are presented, including development and tank testing of a novel power absorbing joint. Wave Dragon belongs in the family of overtopping wave energy converters. The energy is captured by waves running up a ramp and overtopping the crest into a reservoir...

  10. Prototype Testing of the Wave Energy Converter Wave Dragon

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter; Friis-Madsen, Erik

    2006-01-01

    The Wave Dragon is an offshore wave energy converter of the overtopping type. It consists of two wave reflectors focusing the incoming waves towards a ramp, a reservoir for collecting the overtopping water and a number of hydro turbines for converting the pressure head into power. In the period...... from 1998 to 2001 extensive wave tank testing on a scale model was carried at Aalborg University. Then, a 57!27 m wide and 237 tonnes heavy (incl. ballast) prototype of the Wave Dragon, placed in Nissum Bredning, Denmark, was grid connected in May 2003 as the world’s first offshore wave energy...

  11. Prototype Testing of the Wave Energy Converter Wave Dragon

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter Bak; Friis-Madsen, Erik

    2004-01-01

    The Wave Dragon is an offshore wave energy converter of the overtopping type. It consists of two wave reflectors focusing the incoming waves towards a ramp, a reservoir for collecting the overtopping water and a number of hydro turbines for converting the pressure head into power. In the period...... from 1998 to 2001 extensive wave tank testing on a scale model was carried at Aalborg University. Then, a 57 x 27 m wide and 237 tonnes heavy (incl. ballast) prototype of the Wave Dragon, placed in Nissum Bredning, Denmark, was grid connected in May 2003 as the world's first offshore wave energy...

  12. D=3, N=8 conformal supergravity and the Dragon window

    CERN Document Server

    Cederwall, Martin; Nilsson, Bengt E W

    2011-01-01

    We give a superspace description of D=3, N=8 supergravity. The formulation is off-shell in the sense that the equations of motion are not implied by the superspace constraints (but an action principle is not given). The multiplet structure is unconventional, which we connect to the existence of a "Dragon window", that is modules occurring in the supercurvature but not in the supertorsion. According to Dragon's theorem this cannot happen above three dimensions. We clarify the relevance of this window for going on the conformal shell, and discuss some aspects of coupling to conformal matter.

  13. Dragones, serpientes y cocodrilos infernales en la comedia de santos

    OpenAIRE

    Gonzalez Fernandez, Luis

    2009-01-01

    International audience; Se examinan en este artículo algunos casos en los que aparecen dragones, serpientes y cocodrilos vinculados al personaje teatral del demonio en la comedia de santos. El corpus es mayormente calderoniano.; Parcours retraçant dans la comedia de santos (pièces hagiographiques) la présence de monstres tels que les dragons, les serpents et les crocodiles là où il y a une relation spécifique avec le diable. Le corpus examiné porte essentiellement sur les oeuvres de Pedro Cal...

  14. National treasure or a redundant relic: the roles of the vernacular in Czech art

    Directory of Open Access Journals (Sweden)

    Filipová, Marta

    2013-02-01

    Full Text Available The article examines the reception of folk art in the visual culture of Bohemia and Czechoslovakia and focuses on the shift in the meaning of folk art in the period of early twentieth-century modernism. It examines closely the main attitudes and approaches to folk art in examples drawn from painting, sculpture and architecture as well as art theory in the Czech-speaking regions from the end of the nineteenth century until the early 1930s. This politically important period that saw the transformation of the Habsburg monarchy into new independent states, including Czechoslovakia, was also marked by the establishment of modernism in Central Europe. Many Czech artists were turning to more cosmopolitan ideas, while simultaneously they retained some of the ideas and ideals from the nineteenth century national revival. These shifts were reflected in the various roles folk art was given, ranging from its association with a nostalgic return to pre-industrial society, to an ideological tool of national revival, and to a redundant relic of the past. Folk art, therefore, is understood as a complex phenomenon, which disrupts the reading of modernism in Central Europe as a straightforward embrace of cosmopolitan ideas in the visual arts and art theory and that challenges the historical opposition between folk art and high art. Simultaneously, its central role in the formation of Central European modernism is emphasized as crucial to our understanding of Central European art in this period.

  15. Precise Prediction of the Dark Matter Relic Density within the MSSM

    Science.gov (United States)

    Harz, J.; Herrmann, B.; Klasen, M.; Kovarik, K.; Steppeler, P.

    With the latest Planck results the dark matter relic density is determined to an unprecedented precision. In order to reduce current theoretical uncertainties in the dark matter relic density prediction, we have calculated next-to-leading order SUSY-QCD corrections to neutralino (co)annihilation processes including Coulomb enhancement effects. We demonstrate that these corrections can have significant impact on the cosmologically favoured MSSM parameter space and are thus of general interest for parameter studies and global fits.

  16. Precise Prediction of the Dark Matter Relic Density within the MSSM

    CERN Document Server

    Harz, Julia; Klasen, Michael; Kovarik, Karol; Steppeler, Patrick

    2015-01-01

    With the latest Planck results the dark matter relic density is determined to an unprecedented precision. In order to reduce current theoretical uncertainties in the dark matter relic density prediction, we have calculated next-to-leading order SUSY-QCD corrections to neutralino (co)annihilation processes including Coulomb enhancement effects. We demonstrate that these corrections can have significant impact on the cosmologically favoured MSSM parameter space and are thus of general interest for parameter studies and global fits.

  17. Relic abundance of MeV millicharged particles

    CERN Document Server

    Dolgov, A D

    2016-01-01

    The relic abundance of light millicharged particles (MCP) with the electric charge $e' = 5\\cdot 10^{-5} e$ and with the mass slightly below or above the electron mass is calculated. The abundance depends on the mass ratio $\\eta=m_X/m_e$ and for $\\eta<1$ can be high enough to allow MCP to be the cosmological dark matter or to make a noticeable contribution to it. On the other hand, for $\\eta \\gtrsim 1$ the cosmological energy density of MCPs can be quite low, $\\Omega_X h_0^2 \\simeq 0.02$ for scalar MCPs, and $\\Omega_X h_0^2 \\simeq 0.001$ for spin 1/2 fermions. But even the lowest value of $\\Omega_X h_0^2$ is in tension with several existing limits on the MCP abundances and parameters. However, these limits have been derived under some natural or reasonable assumptions on the properties of MCPs. If these assumptions are relaxed, a patch in the mass-charge plot of MCPs may appear, permitting them to be dark matter particles.

  18. A stellar relic from the early Milky Way

    CERN Document Server

    Christlieb, N; Beers, T C; Gustafsson, B; Korn, A J; Barklem, P S; Karlsson, T; Mizuno-Wiedner, M; Rossi, S; Christlieb, Norbert; Bessell, Michael S.; Beers, Timothy C.; Gustafsson, Bengt; Korn, Andreas; Barklem, Paul S.; Karlsson, Torgny; Mizuno-Wiedner, Michelle; Rossi, Silvia

    2002-01-01

    The chemical composition of the most metal-deficient stars reflects the composition of the gas from which they formed. These old stars provide crucial clues to the star formation history and the synthesis of chemical elements in the early Universe. They are the local relics of epochs otherwise observable only at very high redshifts; if totally metal-free (``population III'') stars could be found, this would allow the direct study of the pristine gas from the Big Bang. Earlier searches for such stars found none with an iron abundance less than 1/10,000 that of the Sun, leading to the suggestion that low-mass stars could only form from clouds above a critical iron abundance. Here we report the discovery of a low-mass star with an iron abundance as low as 1/200,000 of the solar value. This discovery suggests that population III stars could still exist, that is, that the first generation of stars also contained long-lived low-mass objects. The previous failure to find them may be an observational selection effect...

  19. Re-acceleration model for the `Sausage' Radio Relic

    CERN Document Server

    Kang, Hyesung

    2016-01-01

    The Sausage radio relic is the arc-like radio structure in the cluster CIZA J2242.8+5301, whose observed properties can be best understood by synchrotron emission from relativistic electrons accelerated at a merger-driven shock. However, there remain a few puzzles that cannot be explained by the shock acceleration model with only in-situ injection. In particular, the Mach number inferred from the observed radio spectral index, $M_{\\rm radio}\\approx 4.6$, while the Mach number estimated from X-ray observations, $M_{\\rm X-ray}\\approx 2.7$. In an attempt to resolve such a discrepancy, here we consider the re-acceleration model in which a shock of $M_s\\approx 3$ sweeps through the intracluster gas with a pre-existing population of relativistic electrons. We find that observed brightness profiles at multi frequencies provide strong constraints on the spectral shape of pre-existing electrons. The models with a power-law momentum spectrum with the slope, $s\\approx 4.1$, and the cutoff Lorentz factor, $\\gamma_{e,c}\\a...

  20. A double radio relic in the merging galaxy cluster ZwCl 0008.8+5215

    CERN Document Server

    van Weeren, R J; Rottgering, H J A; Bruggen, M; Intema, H T; van Velzen, S

    2011-01-01

    Some merging galaxy clusters host diffuse elongated radio sources, also called radio relics. It is proposed that these radio relics trace shock waves in the intracluster medium created during a cluster merger event. Within the shock waves particles are accelerated to relativistic energies, and in the presence of a magnetic field synchrotron radiation will be emitted. Here we present GMRT and WSRT observations of a new double relic in the galaxy cluster ZwCl 0008.8+5215. Optical V, R, and I band images of the cluster were taken with the INT. An optical spectrum, to determine the redshift of the cluster, was taken with the WHT. Our observations show the presence of a double radio relic in the galaxy cluster ZwCl 0008.8+5215, for which we find a spectroscopic redshift of z = 0.1032 \\pm 0.0018 from an optical spectrum of one of the cD galaxies. The spectral index of the two relics steepens inwards to the cluster center. For part of the relics, we measure a polarization fraction in the range ~ 5-25%. A ROSAT X-ray...

  1. Another shock for the Bullet cluster, and the source of seed electrons for radio relics

    CERN Document Server

    Shimwell, Timothy W; Brown, Shea; Feretti, Luigina; Gaensler, B M; Johnston-Hollitt, M; Lage, Craig; Srinivasan, Raghav

    2015-01-01

    With Australia Telescope Compact Array observations, we detect a highly elongated Mpc-scale diffuse radio source on the eastern periphery of the Bullet cluster 1E0657-55.8, which we argue has the positional, spectral and polarimetric characteristics of a radio relic. This powerful relic (2.3+/-0.1 x 10^25 W Hz^-1) consists of a bright northern bulb and a faint linear tail. The bulb emits 94% of the observed radio flux and has the highest surface brightness of any known relic. Exactly coincident with the linear tail we find a sharp X-ray surface brightness edge in the deep Chandra image of the cluster -- a signature of a shock front in the hot intracluster medium (ICM), located on the opposite side of the cluster to the famous bow shock. This new example of an X-ray shock coincident with a relic further supports the hypothesis that shocks in the outer regions of clusters can form relics via diffusive shock (re-)acceleration. Intriguingly, our new relic suggests that seed electrons for reacceleration are coming...

  2. Zhang Xu and Naxi Culture

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    Zhang Xu, who has travelled to the remote city of Lijiang in Yunnan Province a dozen times or more, has been adopted by the Naxi people. Her passionate interest in Naxi culture drives her efforts to introduce it to the world. The house of Zhang Xu’s Naxi parents in Mingyintuli Village is surrounded by Jade Dragon Mountain.

  3. Cultural Implications of Dragon in The Woman Warrior

    Institute of Scientific and Technical Information of China (English)

    储俏

    2015-01-01

    <正>The Woman Warrior,written by Maxine Hong Kinston,won the National Book Critic Circle Award for the best work of nonfiction in 1976.It was also acclaimed as one of the top nonfiction books of the 1970s by Time Magazine.As a second generation immigrant female writer being raised in California,Kingston was in an awkward dilemma hovering

  4. Phenolic compounds of Dragon's blood from Dracaena draco.

    Science.gov (United States)

    González, A G; León, F; Sánchez-Pinto, L; Padrón, J I; Bermejo, J

    2000-09-01

    Three new compounds, 2,4,4'-trihydroxydihydrochalcone (1), 3-(4-hydroxybenzyl)-5,7-dimethoxychroman (2), and 7-hydroxy-3-(4-hydroxybenzyl)chromone (3), were isolated from the resin "Dragon's blood" obtained from Dracaena draco along with 18 known compounds. The structures of 1, 2, and 3 were determined using MS and NMR techniques.

  5. Vulnerable Cyborgs: Learning to Live with our Dragons.

    NARCIS (Netherlands)

    Coeckelbergh, Mark

    2011-01-01

    Transhumanist visions appear to aim at invulnerability. We are invited to fight the dragon of death and disease, to shed our old, human bodies, and to live on as invulnerable minds or cyborgs. This paper argues that even if we managed to enhance humans in one of these ways, we would remain highly

  6. A Literature Unit for "Dragon's Gate" by Laurence Yep.

    Science.gov (United States)

    Thomas-Vallens, Mary

    Intended as a an aid to classroom teachers, this 52-page handbook presents a literature unit based on the children and young people's book, "Dragon's Gate" by Laurence Yep. It begins with sample lesson plans, pre-reading activities, author information, a book summary, vocabulary lists and suggested vocabulary activities. Next, chapters…

  7. A new steroidal saponin from dragon's blood of Dracaena cambodiana.

    Science.gov (United States)

    Luo, Ying; Shen, Hai-Yan; Zuo, Wen-Jian; Wang, Hui; Mei, Wen-Li; Dai, Hao-Fu

    2015-01-01

    Phytochemical study on dragon's blood of Dracaena cambodiana led to a new steroidal saponin, cambodianoside G(1), and six known ones (2-7). The structure of the new compound was elucidated on the basis of detailed spectroscopic analysis. Evaluation of antibacterial activities showed that compound 7 exhibited antibacterial activity against Staphylococcus aureus.

  8. Lion and dragon: four centuries of Dutch-Vietnamese relations

    NARCIS (Netherlands)

    Kleinen, J.; van der Zwan, B.; Moors, H.; van Zeeland, T.

    2008-01-01

    Dutch-Vietnamese relations go back as far as the beginning of the seventeenth century. For a long time, relations between the Dutch lion and the Vietnamese dragon have been fragile and even violent. Although the relations were not continuously bad, they remained distant rather than warm. Today Vietn

  9. Ecological allometries and niche use dynamics across Komodo dragon ontogeny

    Science.gov (United States)

    Purwandana, Deni; Ariefiandy, Achmad; Imansyah, M. Jeri; Seno, Aganto; Ciofi, Claudio; Letnic, Mike; Jessop, Tim S.

    2016-04-01

    Ontogenetic allometries in ecological habits and niche use are key responses by which individuals maximize lifetime fitness. Moreover, such allometries have significant implications for how individuals influence population and community dynamics. Here, we examined how body size variation in Komodo dragons ( Varanus komodoensis) influenced ecological allometries in their: (1) prey size preference, (2) daily movement rates, (3) home range area, and (4) subsequent niche use across ontogeny. With increased body mass, Komodo dragons increased prey size with a dramatic switch from small (≤10 kg) to large prey (≥50 kg) in lizards heavier than 20 kg. Rates of foraging movement were described by a non-linear concave down response with lizard increasing hourly movement rates up until ˜20 kg body mass before decreasing daily movement suggesting reduced foraging effort in larger lizards. In contrast, home range area exhibited a sigmoid response with increased body mass. Intrapopulation ecological niche use and overlap were also strongly structured by body size. Thus, ontogenetic allometries suggest Komodo dragon's transition from a highly active foraging mode exploiting small prey through to a less active sit and wait feeding strategy focused on killing large ungulates. Further, our results suggest that as body size increases across ontogeny, the Komodo dragon exhibited marked ontogenetic niche shifts that enabled it to function as an entire vertebrate predator guild by exploiting prey across multiple trophic levels.

  10. Clones, Drones and Dragons: Ongoing Uncertainties around School Leader Development

    Science.gov (United States)

    Walker, Allan

    2015-01-01

    This article examines a number of key issues around successful school leadership and leader development. Three metaphors are used to frame, track and analyse recent research and commentary in the area--these are clones, drones and dragons. Although development mechanisms rarely fall neatly within one category, the metaphors provide a useful way to…

  11. Here Be Dragons: voorgeschiedenis en ontstaan van Adventure Games

    NARCIS (Netherlands)

    Veugen, Connie

    2004-01-01

    The article traces the history of adventure games from the birth of the fantasy genre in William Morris' work and the origins of the Kriegspiel, through Tolkien's fantasy world and Dungeons and Dragons to the early text adventures and the first graphical adventures.

  12. Lion and dragon: four centuries of Dutch-Vietnamese relations

    NARCIS (Netherlands)

    Kleinen, J.; van der Zwan, B.; Moors, H.; van Zeeland, T.

    2008-01-01

    Dutch-Vietnamese relations go back as far as the beginning of the seventeenth century. For a long time, relations between the Dutch lion and the Vietnamese dragon have been fragile and even violent. Although the relations were not continuously bad, they remained distant rather than warm. Today

  13. A Literature Unit for "Dragon's Gate" by Laurence Yep.

    Science.gov (United States)

    Thomas-Vallens, Mary

    Intended as a an aid to classroom teachers, this 52-page handbook presents a literature unit based on the children and young people's book, "Dragon's Gate" by Laurence Yep. It begins with sample lesson plans, pre-reading activities, author information, a book summary, vocabulary lists and suggested vocabulary activities. Next, chapters…

  14. Aeroacoustics of the swinging corrugated tube: Voice of the Dragon

    NARCIS (Netherlands)

    Nakiboglu, G.; Rudenko, O.; Hirschberg, Abraham

    2012-01-01

    When one swings a short corrugated pipe segment around one’s head, it produces a musically interesting whistling sound. As a musical toy it is called a “Hummer” and as a musical instrument, the “Voice of the Dragon.” The fluid dynamics aspects of the instrument are addressed, corresponding to the

  15. Clones, Drones and Dragons: Ongoing Uncertainties around School Leader Development

    Science.gov (United States)

    Walker, Allan

    2015-01-01

    This article examines a number of key issues around successful school leadership and leader development. Three metaphors are used to frame, track and analyse recent research and commentary in the area--these are clones, drones and dragons. Although development mechanisms rarely fall neatly within one category, the metaphors provide a useful way to…

  16. Data Obtained from Prototype Wave Dragon in Nissum Bredning

    DEFF Research Database (Denmark)

    Tedd, James William; Curie, Marie; Kofoed, Jens Peter

    This report is a product of the Project: Sea Testing and Optimisation of Power Production on a Scale 1:4.5 Test Rig of the Offshore Wave Energy Converter Wave Dragon. This report aims to provide access for the project partners to the raw data obtained from the testing period in Nissum Bredning...

  17. Direct measurements of radiative capture reactions with DRAGON

    Science.gov (United States)

    Christian, Gregory

    2015-10-01

    Direct measurements of radiative proton and alpha capture reactions are crucial for understanding nucleosynthesis in a variety of astrophysical environments, including classical novae, supernovae, X-Ray bursts, and quiescent stellar burning. Often the most important reactions have very low cross sections or involve unstable targets, making laboratory measurements extremely challenging. The detector of recoils and gammas of nuclear reactions (DRAGON) at TRIUMF is a recoil mass separator designed to measure radiative capture reactions in inverse kinematics, with beam suppression factors as high as 1016. When combined with the intense radioactive beams available at the ISAC-I facility, DRAGON's capabilities are unique and world-leading. In this talk, I will give a brief technical overview of DRAGON before presenting results from recent experiments. Some highlights include the first-ever direct measurement of 38K(p , γ) 39Ca, a crucial reaction for determining the endpoint of nova nucleosynthesis, and measurements of 76Se(α , γ) 80Kr. The latter measurements determine the rate of the reverse reaction, 80Kr(γ , α) 76Se, an important waiting point in the synthesis of the p-nuclei. I will also discuss future (and ongoing) developments at DRAGON, including the commissioning of a new chamber for high-precision elastic scattering measurements and plans to determine the 330 keV resonance strength in 18F(p , γ) 19Ne via measurements of 15O(α , γ) 19Ne and 15O + α elastic scattering.

  18. Data Obtained from Prototype Wave Dragon in Nissum Bredning

    DEFF Research Database (Denmark)

    Tedd, James William; Curie, Marie; Kofoed, Jens Peter

    This report is a product of the Project: Sea Testing and Optimisation of Power Production on a Scale 1:4.5 Test Rig of the Offshore Wave Energy Converter Wave Dragon. This report aims to provide access for the project partners to the raw data obtained from the testing period in Nissum Bredning...

  19. Low Cost Mars Sample Return Utilizing Dragon Lander Project

    Science.gov (United States)

    Stoker, Carol R.

    2014-01-01

    We studied a Mars sample return (MSR) mission that lands a SpaceX Dragon Capsule on Mars carrying sample collection hardware (an arm, drill, or small rover) and a spacecraft stack consisting of a Mars Ascent Vehicle (MAV) and Earth Return Vehicle (ERV) that collectively carry the sample container from Mars back to Earth orbit.

  20. Lion and dragon: four centuries of Dutch-Vietnamese relations

    NARCIS (Netherlands)

    Kleinen, J.; van der Zwan, B.; Moors, H.; van Zeeland, T.

    2008-01-01

    Dutch-Vietnamese relations go back as far as the beginning of the seventeenth century. For a long time, relations between the Dutch lion and the Vietnamese dragon have been fragile and even violent. Although the relations were not continuously bad, they remained distant rather than warm. Today Vietn

  1. Wave Dragon Wave Energy Converters Used as Coastal Protection

    DEFF Research Database (Denmark)

    Nørgaard, Jørgen Harck; Andersen, Thomas Lykke; Kofoed, Jens Peter

    2011-01-01

    This paper deals with wave energy converters used to reduce the wave height along shorelines. For this study the Wave Dragon wave energy converter is chosen. The wave height reduction from a single device has been evaluated from physical model tests in scale 1:51.8 of the 260 x 150 m, 24 kW/m model...

  2. 闽西客家地区龙狮运动发展现状及对策研究%On the Current Conditions of Dragon and Lion Sports Developing and the Countermeasures

    Institute of Scientific and Technical Information of China (English)

    黄玮瑛

    2013-01-01

      闽西客家地区龙狮运动是客家武术的精华,受外来文化的冲击等因素的制约,龙狮运动的发展进入到了瓶颈阶段。文章通过研究应结合龙狮运动自身价值及闽西客家地区的自然、人文资源优势,以自然旅游为依托、以民俗活动为载体、以龙狮运动进高校为契机,加强龙狮运动与客家民俗活动、闽西文化旅游建设及教育的结合度,从而促进龙狮运动的发展。%The dragon and lion sports are the essence of Hakka Wushu in Fujian province. Under the impact of foreign culture factors, the development of dragon and lion sports have entered into a bottleneck stage. From the research ,we should combine the dragon and lion dances' sport value with the natural and humanistic resources of Hakka region, relying on the natural tourism, and being supported by folk activities as the carriers, it's an opportunity for dragon and lion sports to get into universities ,and strengthen the combination of the dragon and lion sports and Hakka folk activities, cultural tourism construction and education of western Fujian province, then we can promote the development of the dragon and lion dance sport.

  3. TURBULENT COSMIC-RAY REACCELERATION AT RADIO RELICS AND HALOS IN CLUSTERS OF GALAXIES

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, Yutaka [Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan); Takizawa, Motokazu [Department of Physics, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata 990-8560 (Japan); Yamazaki, Ryo [Department of Physics and Mathematics, Aoyama Gakuin University, Fuchinobe, Chuou-ku, Sagamihara 252-5258 (Japan); Akamatsu, Hiroki [SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht (Netherlands); Ohno, Hiroshi, E-mail: fujita@vega.ess.sci.osaka-u.ac.jp [Tohoku Bunkyo College, 515 Katayachi, Yamagata 990-2316 (Japan)

    2015-12-20

    Radio relics are synchrotron emission found on the periphery of galaxy clusters. From the position and the morphology, it is often believed that the relics are generated by cosmic-ray (CR) electrons accelerated at shocks through a diffusive shock acceleration (DSA) mechanism. However, some radio relics have harder spectra than the prediction of the standard DSA model. One example is observed in the cluster 1RXS J0603.3+4214, which is often called the “Toothbrush Cluster.” Interestingly, the position of the relic is shifted from that of a possible shock. In this study, we show that these discrepancies in the spectrum and the position can be solved if turbulent (re)acceleration is very effective behind the shock. This means that for some relics turbulent reacceleration may be the main mechanism to produce high-energy electrons, contrary to the common belief that it is the DSA. Moreover, we show that for efficient reacceleration, the effective mean free path of the electrons has to be much smaller than their Coulomb mean free path. We also study the merging cluster 1E 0657−56, or the “Bullet Cluster,” in which a radio relic has not been found at the position of the prominent shock ahead of the bullet. We indicate that a possible relic at the shock is obscured by the observed large radio halo that is generated by strong turbulence behind the shock. We propose a simple explanation of the morphological differences of radio emission among the Toothbrush, the Bullet, and the Sausage (CIZA J2242.8+5301) Clusters.

  4. Tracing low-mass galaxy clusters using radio relics: the discovery of Abell 3527-bis

    Science.gov (United States)

    de Gasperin, F.; Intema, H. T.; Ridl, J.; Salvato, M.; van Weeren, R.; Bonafede, A.; Greiner, J.; Cassano, R.; Brüggen, M.

    2017-01-01

    Context. Galaxy clusters undergo mergers that can generate extended radio sources called radio relics. Radio relics are the consequence of merger-induced shocks that propagate in the intra cluster medium (ICM). Aims: In this paper we analyse the radio, optical and X-ray data from a candidate galaxy cluster that has been selected from the radio emission coming from a candidate radio relic detected in NRAO VLA Sky Survey (NVSS). Our aim is to clarify the nature of this source and prove that under certain conditions radio emission from radio relics can be used to trace relatively low-mass galaxy clusters. Methods: We observed the candidate galaxy cluster with the Giant Meterwave Radio Telescope (GMRT) at three different frequencies. These datasets have been analysed together with archival data from ROSAT in the X-ray and with archival data from the Gamma-Ray Burst Optical/Near-Infrared Detector (GROND) telescope in four different optical bands. Results: We confirm the presence of a 1 Mpc long radio relic located in the outskirts of a previously unknown galaxy cluster. We confirm the presence of the galaxy cluster through dedicated optical observations and using archival X-ray data. Due to its proximity and similar redshift to a known Abell cluster, we named it Abell 3527-bis. The galaxy cluster is amongst the least massive clusters known to host a radio relic. Conclusions: We showed that radio relics can be effectively used to trace a subset of relatively low-mass galaxy clusters that might have gone undetected in X-ray or Sunyaev-Zel'dovich (SZ) surveys. This technique might be used in future deep, low-frequency surveys such as those carried on by the Low Frequency Array (LOFAR), the Upgraded GMRT (uGMRT) and, ultimately, the Square Kilometre Array (SKA).

  5. Loureirin B: An Effective Component in Dragon's Blood Modulating Sodium Currents in TG Neurons.

    Science.gov (United States)

    Liu, Xiangming; Yin, Shijin; Chen, Su; Ma, Quanshun

    2005-01-01

    To test, analyze and express the relationship between the pharmacological effect of Traditional Chinese Medicine (TCM) dragon's blood and that of its component loureirin B, specify an operational definition for effective component from raw drug of TCM. Using the whole-cell patch-clamp technique, the effects of dragon's blood and its component loureirin B on tetrodotoxin-sensitive (TTX-S) and tetrodotoxin-resistant (TTX-R) sodium currents in trigeminal ganglion (TG) neurons were observed. The results show that both dragon's blood and loureirin B suppressed two types of peak sodium currents in a dose-dependent way. 0.1% dragon's blood and 0.2mmol/L loureirin B affected the activation and inactivation of sodium channels. The results further prove the analgetic mechanism of dragon's blood interfering with the nociceptive transmission. According to the above definition, loureirin B is the effective component in dragon's blood modulating sodium currents in TG neurons.

  6. Model Testing of Forces in the Reflector Joint and Mooring Forces on Wave Dragon

    DEFF Research Database (Denmark)

    Gilling, Lasse; Kofoed, Jens Peter; Tedd, James

    This report aims to present the results of a test series analysing the forces in the redesigned reflector joint and the forces in the main mooring link. The resluts presented are intended to be used by WD project partners, for the design and construction of the joint on the prototype Wave Dragon...... at Nissum Bredning and for future North Sea scale Wave Dragon. Lengths, forces and other dimentions presented are scaled to the North sea Wave Dragon unless otherwise specified....

  7. Model Testing of Forces in the Reflector Joint and Mooring Forces on Wave Dragon

    DEFF Research Database (Denmark)

    Gilling, Lasse; Kofoed, Jens Peter; Tedd, James

    This report aims to present the results of a test series analysing the forces in the redesigned reflector joint and the forces in the main mooring link. The resluts presented are intended to be used by WD project partners, for the design and construction of the joint on the prototype Wave Dragon...... at Nissum Bredning and for future North Sea scale Wave Dragon. Lengths, forces and other dimentions presented are scaled to the North sea Wave Dragon unless otherwise specified....

  8. Tracing low-mass galaxy clusters with radio relics: the discovery of Abell 3527-bis

    CERN Document Server

    de Gasperin, F; Ridl, J; Salvato, M; van Weeren, R; Bonafede, A; Greiner, J; Cassano, R; Bruggen, M

    2016-01-01

    Galaxy clusters undergo mergers that can generate extended radio sources called radio relics. Radio relics are the consequence of merger-induced shocks that propagate in the intra cluster medium (ICM). In this paper we analyse the radio, optical and X-ray data from a candidate galaxy cluster that has been selected from the radio emission coming from a candidate radio relic detected in NRAO VLA Sky Survey (NVSS). Our aim is to clarify the nature of this source and prove that under certain conditions radio emission from radio relics can be used to trace relatively low-mass galaxy clusters. We have observed the candidate galaxy cluster with the Giant Meterwave Radio Telescope (GMRT) at three different frequencies. These datasets have been analysed together with archival data from ROSAT in the X-ray and with archival data from the Gamma-Ray Burst Optical/Near-Infrared Detector (GROND) telescope in four different optical bands. We confirm the presence of a 1 Mpc long radio relic located in the outskirts of a previ...

  9. Challenges to our understanding of radio relics: X-ray observations of the Toothbrush cluster

    Science.gov (United States)

    Ogrean, G. A.; Brüggen, M.; van Weeren, R. J.; Röttgering, H.; Croston, J. H.; Hoeft, M.

    2013-07-01

    The cluster 1RXS J0603.3+4214 is a merging galaxy cluster that hosts three radio relics and a giant radio halo. The northern relic, the Toothbrush, is 1.9 Mpc long and has an unusual linear morphology. According to simple diffusive shock acceleration theory, its radio spectral index indicates a Mach number of 3.3-4.6. Here, we present results from a deep XMM-Newton observation of the cluster. We observe two distinct cluster cores that have survived the merger. The presence of three shocks at or near the locations of the radio relics is confirmed by density and temperature discontinuities. However, the observation poses several puzzles that challenge our understanding of radio relics: (i) at the Toothbrush, the shock Mach number is not larger than 2, in apparent conflict with the shock strength predicted from the radio spectrum; (ii) at the Toothbrush, the shock front is, in part, spatially offset from the radio emission; (iii) at the eastern relic, we detect a temperature jump corresponding to a Mach number of approximately 2.5, but there is no associated surface brightness discontinuity. We discuss possible explanations for these findings.

  10. Challenges to our understanding of radio relics: X-ray observations of the Toothbrush cluster

    CERN Document Server

    Ogrean, G A; van Weeren, R J; Röttgering, H; Croston, J H; Hoeft, M

    2013-01-01

    The cluster 1RXS J0603.3+4214 is a merging galaxy cluster that hosts three radio relics and a giant radio halo. The northern relic, the Toothbrush, is 1.9-Mpc long and has an unusual linear morphology. According to simple diffusive shock acceleration theory, its radio spectral index indicates a Mach number of 3.3-4.6. Here, we present results from a deep XMM-Newton observation of the cluster. We observe two distinct cluster cores that have survived the merger. The presence of three shocks at or near the locations of the radio relics is confirmed by density and temperature discontinuities. However, the observation poses several puzzles that challenge our understanding of radio relics: (i) at the Toothbrush, the shock Mach number is not larger than 2, in apparent conflict with the shock strength predicted from the radio spectrum; (ii) at the Toothbrush, the shock front is, in part, spatially offset from the radio emission; (iii) at the eastern relic, we detect a temperature jump corresponding to a Mach number o...

  11. Turbulent Cosmic Ray Reacceleration at Radio Relics and Halos in Clusters of Galaxies

    CERN Document Server

    Fujita, Yutaka; Yamazaki, Ryo; Akamatsu, Hiroki; Ohno, Hiroshi

    2015-01-01

    Radio relics are synchrotron emission found on the periphery of galaxy clusters. From the position and the morphology, it is often believed that the relics are generated by cosmic ray (CR) electrons accelerated at shocks through diffusive shock acceleration (DSA) mechanism. However, some radio relics have harder spectra than the prediction of the standard DSA model. One example is observed in the cluster 1RXS J0603.3+4214, which is often called the ``toothbrush cluster''. Interestingly, the position of the relic is shifted from that of a possible shock. In this study, we show that these discrepancies in the spectrum and the position can be solved if turbulent (re)acceleration is very effective behind the shock. This means that for some relics turbulent reacceleration may be the main mechanism to produce high energy electrons, contrary to the common belief that it is the DSA. Moreover, we show that for efficient reacceleration, the effective mean free path of the electrons has to be much smaller than their Cou...

  12. Two new confirmed massive relic galaxies: red nuggets in the present-day Universe

    Science.gov (United States)

    Ferré-Mateu, Anna; Trujillo, Ignacio; Martín-Navarro, Ignacio; Vazdekis, Alexandre; Mezcua, Mar; Balcells, Marc; Domínguez, Lilian

    2017-01-01

    We confirm two new local massive relic galaxies, i.e. untouched survivors of the early universe massive population: Mrk 1216 and PGC 032873. Both show early and peaked formation events within very short timescales (formation histories remain virtually unchanged out to several effective radii, even when considering the steeper IMF values inferred out to ˜3 effective radii. Their morphologies, kinematics and density profiles are like those found in the z>2 massive population, setting them apart of the typical z˜0 massive early-type galaxies. We find that there seems to exist a degree of relic that is related on how far into the path to become one of these typical z˜0 massive galaxies the compact relic has undergone. This path is partly dictated by the environment the galaxy lives in. For galaxies in rich environments, such as the previously reported relic galaxy NGC 1277, the most extreme properties (e.g. sizes, short formation timescales, larger super-massive black holes) are expected, while lower density environments will have galaxies with delayed and/or extended star formations, slightly larger sizes and not that extreme black hole masses. The confirmation of 3 relic galaxies up to a distance of 106 Mpc implies a lower limit in the number density of these red nuggets in the local universe of 6× 10-7 Mpc3, which is within the theoretical expectations.

  13. 龙、龙图腾与龙的传人——兼驳一种观点%Dragon, Dragon Totem, and Descendants of the Dragon —— Refutation of a View

    Institute of Scientific and Technical Information of China (English)

    段宝林

    2011-01-01

    有一种观点认为中国未曾存在过龙的图腾,说中国人是“龙的传人”是“误谈”,这是不了解龙产生的历史及龙所体现的民族精神。历史记载、考古事实等都证明,从开天辟地的盘古,到人祖伏羲、女娲,到炎帝神龙氏、黄帝轩辕氏,直至夏禹一族均为龙图腾——龙之传人;中国南北许多民族的图腾和象征都是龙。龙是中华凝聚力的象征、中华儿女大团结的象征、中华民族“和合精神”的象征。%A view holds that since there did not exist dragon totem in China, the saying that Chinese are the descendents of dragon is wrong. Those holding this view do not understand the history of dragon generation and the spirit reflected by dragon. Historical records, and archaeological facts proved that from the epoch of Pangu, to the human ancestors Fuxi, Nvwa, to the Yah Emperor' s dragon clan,the Yellow Emperor's Xuanyuan clan, and up to the Yu clan in Xia Dynasty, they all had dragon totem-descendents of dragon. Many totems or symbols of ethnics in southern and northern China are dragon. Dragon is the symbol of Chinese cohesion,of Chinese peoples' great unity, and of Chinese peoples'"spirit of harmony".

  14. Production of dragon's blood in Dracaena cochinchinensis plants by inoculation of Fusarium proliferatum.

    Science.gov (United States)

    Wang, Xing-Hong; Zhang, Changhe; Yang, Ling-Ling; Gomes-Laranjo, José

    2011-02-01

    Dragon's blood is a traditional medicine widely used in the world from ancient times. However, little is known about its formation mechanism. This work aimed to gain some insights into its formation mechanism and to control its production. The results demonstrate that wounding plus causal fungal infection and keeping the wound moist are essential for efficient dragon's blood formation in Dracaena cochinchinensis. Two fungal isolates YM-266 and YM-71213 of Fusarium proliferatum increased the yield of dragon's blood in D. cochinchinensis trees by 2.7- and 3.3-times compared to that of the control (wounding alone and keeping the wound moist), respectively. The fungal induced dragon's blood had almost identical chemical constituents to that of the natural dragon's blood with a higher loureirins a and b content as analyzed by TLC and HPLC. In addition, the induced dragon's blood had similar antimicrobial activity and similar or higher antioxidant activity than that of the natural dragon's blood. The novel biological technology developed here for the production of dragon's blood is safe, repeatable, practical, and feasible for the farmers, enabling the production of dragon's blood in a sustainable way without destroying the endangered trees and environment. Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.

  15. Dragon's blood may have radioprotective effects in radiation-induced rat brain injury.

    Science.gov (United States)

    Xin, Nian; Li, Yu-Juan; Li, Xu; Wang, Xiao; Li, Yan; Zhang, Xiao; Dai, Rong-Ji; Meng, Wei-Wei; Wang, Hai-Long; Ma, Hong; Schläppi, Michael; Deng, Yu-Lin

    2012-07-01

    Dragon's blood is a bright red resin obtained from Dracaena cochinchinensis. It is a traditional medicinal that is used for wound healing and to stop bleeding. Its main biological activity appears to be from phenolic compounds found in Dragon's blood. In this study, the radioprotective effects of Dragon's blood were examined after whole brain irradiation of rats with either 100 MeV/u Carbon (12)C(6+) heavy ions or (60)Co γ-rays. The amounts of radiation-induced oxidative stress, inflammatory cytokines and apoptosis in irradiated rat brains were compared with and without Dragon's blood treatment. Compared to the "irradiation only" control group, the Dragon's blood treatment group significantly decreased malondialdehyde and hydrogen peroxide levels, and increased superoxide dismutase activity and glutathione levels induced by oxidative stress in radiation exposed rats (P Dragon's blood also significantly reduced radiation-induced inflammatory cytokines of tumor necrosis factor-α, interferon-γ and interleukin-6 levels (P Dragon's blood significantly increased expression of brain-derived neurophic factor and inhibited the expression of pro-apoptotic caspase 3 (P Dragon's blood significantly inhibited expression of the AP-1 transcription factor family members c-fos and c-jun proteins (P Dragon's blood has radioprotective properties in rat brains after both heavy ions and (60)Co γ-ray exposure.

  16. Survivability mode and extreme loads on the mooring lines of the Wave Dragon Wave Energy Converter

    Energy Technology Data Exchange (ETDEWEB)

    Parmeggiani, S.; Kofoed, J.P.

    2010-11-15

    This report is a product of the cooperation agreement between Wave Dragon and Aalborg University regarding phase 2 of the development of the Wave Dragon Wave Energy Converter. The research is carried out by testing the 1:51.8 scale model of the Wave Dragon, aiming at the assessment of the survivability of the device in extreme waves and evaluation of the design loads for the mooring component. The outcome of the research will be used as input for future research work aimed at the design of the mooring system and the certification of the structural design for the full scale Wave Dragon demonstrator. (Author)

  17. Anion and Cation Ionic Conductivity of Dragon Fruit

    Science.gov (United States)

    Hajar, Nadya; Asiah, M. N.; Abdullah, S.; Rusop, M.

    2010-07-01

    The separation of all ions in a synthetic solution was achieved with an anion eluent containing 0.3392 g Na2CO3 and 0.084 g NaHCO2 and the run around 20 min. Cation eluent containing 0.60 g Tartaric acid and 0.125 g Dipicolinic acid and the run around 16 min. This method was applied to dragon fruit juice with success and has shown sensitivity. Moreover, sample preparation was a simple 1:1, 1:10, 1:100 and 1:1000 ppm with 0.20 mm filtration and direct injection without prior sample clean-up. Due to the use of eluent generator, very low conductance background conductivity can be obtained and sensitivity of dragon fruit has been greatly improved. Under the experimental condition, several inorganic anions, such as F-, NO3-, NO2-, Br- and PO43- obtained from dragon fruit. For cation, inorganic ions that occurred during the experiment were NH3+, Ca+, and Mg+. Conductivity for anion of F-, NO3-, NO2-, Br- and PO43- were approximately 20, 17, 16, 16 and 20 μS/cm, respectively. Concentration for F- is 1.57 mg/l, NO3- is 1.92 mg/l, NO2- is 0.30 mg/l, Br- is 0.45 mg/l and PO43- is 4.45 mg/l. Conductivity for cation of NH3+, Ca+, and Mg+ were approximately 537, 538 and 531 μS/cm, respectively. Concentration for cation of NH3+ is 0.93 mg/l, Ca+ is 1.15 mg/l, and Mg+ 7.285 is mg/l. The method has successfully applied to the determination of inorganic ions in dragon fruit. An ion chromatography method is described for the simultaneous determination of ionic conductivity for dragon fruit juice using a selected anion and cation eluent. The detection of ionic conductivity in dragon fruit juice has been studied.

  18. 论赛珍珠《龙子》与《水浒传》的互文性%A study on intertextuality between“Dragon Seed” and“All Men Are Brothers” by Pearl S.Buck

    Institute of Scientific and Technical Information of China (English)

    潘玥

    2015-01-01

    Pearl Buck's works mostly reflected her love for Chinese novel All Men are Brothers.Pearl S.Buck's no-vel “Draon Seed” recorded Japanese cruel and violent military troops in China, depicted psychological process of Chinese people in the Anti-Japanese War, reflected the distortion of humanity from the consequences of war, thus“Dragon Seed”could be seen as a true epic of Chinese people's heroic resistance.There is intertextuality of history and cultural meaning between“All Men Are Brothers” and“Dragon Seed” written by Pearl S.Buck.All Men Are Brothers is not only the text eye of Dragon Seed, but also the sample of the spirit of Dragon Seed.Dragon Seed is actually a modern version of All Men Are Brothers about Anti-Japanese War.%赛珍珠诸多作品中均体现出一种无法割舍的“水浒情结”,赛珍珠的小说《龙子》( Dragon Seed)中林郯一家抗击日军的生命轨迹和民族精神不仅是主人公反抗精神的体现,也是赛珍珠“水浒情结”的体现。《龙子》与赛珍珠的英文译作《水浒传》( All Men are Brothers)存在互文性,《水浒传》不仅是《龙子》的文眼,而且是《龙子》的精神范本,《龙子》实际上是在演绎一部抗战版本的现代《水浒传》。

  19. The first observations of wide-band interferometers and the spectra of relic gravitons

    Science.gov (United States)

    Giovannini, Massimo

    2016-08-01

    Stochastic backgrounds of relic gravitons of cosmological origin extend from frequencies of the order of the aHz up to the GHz range. Since the temperature and polarization anisotropies constrain the low frequency normalization of the spectra, in the concordance paradigm the strain amplitude corresponding to the frequency window of wide-band interferometers turns out to be, approximately, nine orders of magnitude smaller than the astounding signal recently reported and attributed to a binary black hole merger. The backgrounds of relic gravitons expected from the early Universe are compared with the stochastic foregrounds stemming from the estimated multiplicity of the astrophysical sources. It is suggested that while the astrophysical foregrounds are likely to dominate between few Hz and 10 kHz, relic gravitons with frequencies exceeding 100 kHz represent a potentially uncontaminated signal for the next generation of high-frequency detectors currently under scrutiny.

  20. Discovery potential for supernova relic neutrinos with slow liquid scintillator detectors

    CERN Document Server

    Wei, Hanyu; Chen, Shaomin

    2016-01-01

    The detection of supernova relic neutrinos would provide a key support for our current understanding of stellar and cosmological evolution, and precise measurements of them would further give us an insight of the profound universe. In this paper we study the potential to detect supernova relic neutrinos using linear alkyl benzene, LAB, as a slow liquid scintillator, which features a good separation of Cherenkov and scintillation lights, thus providing a new ability in particle identification. We also address key issues of current experiments, including 1) the charged current background of atmospheric neutrinos in water Cherenkov detectors, and 2) the neutral current background of atmospheric neutrinos in typical liquid scintillator detectors. With LAB, a kiloton-scale detector, like the SNO, KamLAND, and the future Jinping neutrino detectors, with $\\mathcal{O}$(10) years of data, would have the sensitivity to discover supernova relic neutrinos, which is comparable to large-volume water Cherenkov, typical liqu...

  1. Discovery potential for supernova relic neutrinos with slow liquid scintillator detectors

    Science.gov (United States)

    Wei, Hanyu; Wang, Zhe; Chen, Shaomin

    2017-06-01

    Detection of supernova relic neutrinos could provide key support for our current understanding of stellar and cosmological evolution, and precise measurements of these neutrinos could yield novel insights into the universe. In this paper, we studied the detection potential of supernova relic neutrinos using linear alkyl benzene (LAB) as a slow liquid scintillator. The linear alkyl benzene features good separation of Cherenkov and scintillation lights, thereby providing a new route for particle identification. We further addressed key issues in current experiments, including (1) the charged current background of atmospheric neutrinos in water Cherenkov detectors and (2) the neutral current background of atmospheric neutrinos in typical liquid scintillator detectors. A kiloton-scale LAB detector at Jinping with O(10) years of data could discover supernova relic neutrinos with a sensitivity comparable to that of large-volume water Cherenkov detectors, typical liquid scintillator detectors, and liquid argon detectors.

  2. The first observations of wide-band interferometers and the spectra of relic gravitons

    Energy Technology Data Exchange (ETDEWEB)

    Giovannini, Massimo, E-mail: massimo.giovannini@cern.ch [Department of Physics, Theory Division, CERN, 1211 Geneva 23 (Switzerland); INFN, Section of Milan-Bicocca, 20126 Milan (Italy)

    2016-08-10

    Stochastic backgrounds of relic gravitons of cosmological origin extend from frequencies of the order of the aHz up to the GHz range. Since the temperature and polarization anisotropies constrain the low frequency normalization of the spectra, in the concordance paradigm the strain amplitude corresponding to the frequency window of wide-band interferometers turns out to be, approximately, nine orders of magnitude smaller than the astounding signal recently reported and attributed to a binary black hole merger. The backgrounds of relic gravitons expected from the early Universe are compared with the stochastic foregrounds stemming from the estimated multiplicity of the astrophysical sources. It is suggested that while the astrophysical foregrounds are likely to dominate between few Hz and 10 kHz, relic gravitons with frequencies exceeding 100 kHz represent a potentially uncontaminated signal for the next generation of high-frequency detectors currently under scrutiny.

  3. Digital preservation technology for cultural heritage

    CERN Document Server

    Zhou, Mingquan; Wu, Zhongke

    2012-01-01

    ""Digital Preservation Technology for Cultural Heritage"" discusses the technology and processes in digital preservation of cultural heritage. It covers topics in five major areas: Digitization of cultural heritage; Digital management in the cultural heritage preservation; Restoration techniques for rigid solid relics; Restoration techniques for paintings; Digital museum. It also includes application examples for digital preservation of cultural heritage. The book is intended for researchers, advanced undergraduate and graduate students in Computer Graphics and Image Processing as well as Cu

  4. [Dragon's blood. A glance into the history of pharmacognosy].

    Science.gov (United States)

    Bruck, M

    1999-01-01

    Dragon's blood, a red resin, which is often used as a dry powdered "herbal" remedy in traditional medicine, has different origins which are briefly discussed. This contribution however focuses on the species of the genus Dracaena Vand ex L., belonging to the Agavaceae and native to the Old World and the Canary Islands. H.J.N. Crantz, a botanist and medical doctor turned pharmacologist (born in 1722 near Luxembourg), had published a brief and very uncommon treatise on this group of plants, which he only knew from botanical gardens. The pharmacognostical and historical background of dragon's blood use is at the core of this contribution--the drug itself being of no major importance in today's medical care.

  5. SUSY constraints from relic density: High sensitivity to pre-BBN expansion rate

    Energy Technology Data Exchange (ETDEWEB)

    Arbey, A. [Universite de Lyon, Lyon F-69000 (France); Universite Lyon 1, Villeurbanne F-69622 (France); Centre de Recherche Astrophysique de Lyon, Observatoire de Lyon, 9 avenue Charles Andre, Saint-Genis Laval cedex F-69561 (France); CNRS, UMR 5574, Ecole Normale Superieure de Lyon, Lyon (France)], E-mail: arbey@obs.univ-lyon1.fr; Mahmoudi, F. [High Energy Physics, Uppsala University, Box 535, 75121 Uppsala (Sweden)

    2008-10-30

    The sensitivity of the lightest supersymmetric particle relic density calculation to the variation of the cosmological expansion rate before nucleosynthesis is discussed. Such a modification of the expansion rate, even extremely modest and with no consequence on the cosmological observations, can greatly enhance the calculated relic density, and therefore change the constraints on the SUSY parameter space drastically. We illustrate this variation in two examples of SUSY models, and show that it is unsafe to use the lower bound of the WMAP limits in order to constrain supersymmetry. We therefore suggest to use only the upper value {omega}{sub DM}h{sup 2}<0.135.

  6. Dark matter relic density from observations of supersymmetry at the ILC

    CERN Document Server

    Lehtinen, Suvi-Leena; List, Jenny

    2016-01-01

    Supersymmetry can explain the observed dark matter relic density with a neutralino dark matter particle and a coannihilating, almost mass-degenerate sparticle. If this were the case in nature, a linear electron positron collider like the ILC could discover the two sparticles if their masses are in the kinematic reach of the collider. This contribution discusses which observations are necessary at the ILC for predicting the dark matter relic density correctly and for confirming that the observed lightest neutralino is the only kind of dark matter. We take the case of stau coannihilation as an example.

  7. Towards the detection of cosmological relic neutrino with neutrino capture on a beta decaying nuclei

    CERN Document Server

    Messina, M; Mangano, G

    2010-01-01

    In this paper we report on recent results in the Þeld of the phenomenology of very low energy neutrino interactions. We brießy describe the cross section calculation for Neutrino Capture on Beta decay nuclei (NCB). We show that the resulting cross section open the possibility to detect the cosmological relic neutrinos. With this achievement, the relic neutrino detection has been downscaled from a principle problem to a technological challenge. We also summarise the state of the art about possible detection techniques.

  8. 76 FR 61340 - Notice of Decision To Authorize the Importation of Dragon Fruit From Thailand Into the...

    Science.gov (United States)

    2011-10-04

    ... Importation of Dragon Fruit From Thailand Into the Continental United States AGENCY: Animal and Plant Health... the importation into the continental United States of dragon fruit (multiple genera and species) from... noxious weeds via the importation of dragon fruit from Thailand. DATES: Effective Date: October 4, 2011...

  9. 76 FR 38349 - Notice of Availability of Pest Risk Analysis for the Importation of Dragon Fruit From Thailand...

    Science.gov (United States)

    2011-06-30

    ... Importation of Dragon Fruit From Thailand Into the Continental United States AGENCY: Animal and Plant Health... States of dragon fruit from Thailand. Based on this analysis, we believe that the application of one or... disseminating plant pests or noxious weeds via the importation of dragon fruit from Thailand. We are making the...

  10. Steroidal saponins from dragon's blood of Dracaena cambodiana.

    Science.gov (United States)

    Shen, Hai-Yan; Zuo, Wen-Jian; Wang, Hui; Zhao, You-Xing; Guo, Zhi-Kai; Luo, Ying; Li, Xiao-Na; Dai, Hao-Fu; Mei, Wen-Li

    2014-04-01

    Six new steroidal saponins, cambodianosides A-F (1-6), together with seven known ones, were isolated from the dragon's blood of Dracaena cambodiana. The structures of 1-6 were elucidated on the basis of detailed spectroscopic analysis, including 1D and 2D NMR techniques and chemical methods. The cytotoxicities of all the isolated compounds were evaluated in vitro against three human cancer cell lines, and compounds 7, 8, and 11 showed significant inhibitory activities.

  11. Two new antimicrobial flavanes from dragon's blood of Dracaena cambodiana.

    Science.gov (United States)

    Chen, Hui-Qin; Zuo, Wen-Jian; Wang, Hui; Shen, Hai-Yan; Luo, Ying; Dai, Hao-Fu; Mei, Wen-Li

    2012-01-01

    Two new flavonoids, named cambodianins D (1) and E (2), together with two known flavanes (2S)-7,4'-dihydroxy-6,8-dimethylflavane (3) and (2S)-7,3'-dihydroxy-4'-methoxy-8-methylflavane (4), were isolated from dragon's blood of Dracaena cambodiana. The new compounds were determined by HR-ESI-MS and spectroscopic techniques (UV, IR, 1D, and 2D NMR). Compounds 1-3 exhibited antimicrobial activities.

  12. Bo Painting with Human, Dragon and Phoenix Pattern

    Institute of Scientific and Technical Information of China (English)

    1995-01-01

    During the period between the Warring States and Qin (221-207 B.C.), Han (206 B.C.-A.D. 220) dynasties in China, silk was called bo, so paintings on silk were called bohua and words on silk boshu. The bohua with a human, dragon and phoenix pattern excavated in 1949 in Changsha, Hunan Province, dates back to the Warring States. It is the earliest painting

  13. Renovation of the Wave Dragon Nissum Bredning Prototype

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter; Friis-Madsen, Erik

    2006-01-01

    This paper presents developments of the Wave Dragon, a large offshore wave energy converter. A prototype has been tested in a real sea environment for over 20 months. During 2005 the plant has been in harbor for a major overhaul of several of its components. The motivation for the upgrades......, the laboratory testing procedure and the design and manufacture are described. The modifications are complete and the prototype is scheduled to be deployed at a higher energy site in December 2005....

  14. Spectral and polarization study of the double relics in Abell 3376 using the GMRT and the VLA

    CERN Document Server

    Kale, Ruta; Bagchi, Joydeep; Paul, Surajit

    2012-01-01

    Double radio relics in galaxy clusters are rare phenomena that trace shocks in the outskirts of merging galaxy clusters. We have carried out a spectral and polarization study of the spectacular double relics in the galaxy cluster A3376 using the Giant Metrewave Radio Telescope at 150 and 325 MHz and the Very Large Array at 1400 MHz. The polarization study at 1400 MHz reveals a high degree of polarization (~30%) and aligned magnetic field vectors (not corrected for Faraday rotation) in the eastern relic. A highly polarized (>60%) filamentary radio source of size ~300 kpc near the eastern relic and north of the bent-jet radio galaxy is detected for the first time. The western relic is less polarized and does not show aligned magnetic field vectors. The distribution of spectral indices between 325 and 1400 MHz over the radio relics show steepening from the outer to the inner edges of the relics. The spectral indices of the eastern and the western relics imply Mach numbers in the range 2.2 to 3.3. Remarkable feat...

  15. Powerful elderly characters in video games: Flemeth of Dragon Age

    Directory of Open Access Journals (Sweden)

    Elisabeta Toma

    2015-12-01

    Full Text Available As games are becoming an increasingly popular medium in various demographic and professional strata, scholars are discussing their content and how they shape society. However, despite an increase in gender analysis of video games, little has been written about orienting games towards an elderly audience, or game representations of aging and older persons. Games specifically designed for older persons are focused on improving cognitive functions, starting from the assumption that the elderly are in need of special games in order to repair age-related deficits. This repair-focused design philosophy comes at the expense of pursuing a broader understanding of quality of life and non-programmatic entertainment. Games-for-fun that also explicitly target the elderly as an audience are almost invisible. In this article we turn our attention to a powerful elderly feminine character in an AAA game designed for entertainment without a serious mission, namely Flemeth from Dragon Age. We discuss how the game depicts and models older characters: What repertoire of portraits has Flemeth as an old woman, in the Dragon Age games? How does Flemeth contribute to an enlarged repertoire of portrayals of old women in video games? We conclude that Flemeth’s gender and age displays in Dragon Age do not impoverish her portrayal but, on the contrary, turn her into a powerful and complex character, thus offering a model for game design to represent and invite older players.

  16. Hydraulic behaviour of the floating wave energy converter Wave Dragon

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    The objective of the project is to establish a scale 1:4.5 test model of the floating offshore wave energy converter - Wave Dragon - for testing at 5 m water depth in the Inlet Nissum Bredning. The test model will be equipped with an existing diameter 340 mm model turbine plus additional outlet tubes simulating the resistance from 1 - 16 turbines. The model will be designed to stay afloat even with a total loss of air pressure in the open bottom buoyancy chambers. The test series will primarily focus on measurements of hydraulic response, forces in the mooring system and overtopping quantities. Also data such as head, rotational speed and power production from the turbine will be monitored during the whole test period. The project will verify the effect of the pressured air buoyancy system, which cannot be scaled correctly in laboratory scale models. The test results will allow for an evaluation of the Wave Dragon power production as a function of sea state and freeboard height, in order to calibrate the existing WD-power simulation software. The model can be utilized for further testing of turbine regulation and stress and strain in the structure, establishing the necessary knowledge base for deploying a full-scale demonstration plant. This CD-ROM contains various videos, reports, notes, conference papers and Power Point presentations on the making of the wave energy converter Wave Dragon. (BA)

  17. Prototype testing of the wave energy converter wave dragon

    Energy Technology Data Exchange (ETDEWEB)

    Kofoed, Jens Peter; Frigaard, Peter [Hydraulics and Coastal Engineering Laboratory, Department of Civil Engineering, Aalborg University, Sohngaardsholmsvej 57, Aalborg 9000 (Denmark); Friis-Madsen, Erik [Loewenmark F.R.I., Copenhagen (Denmark); Soerensen, Hans Chr. [SPOK, Copenhagen (Denmark)

    2006-02-01

    The Wave Dragon is an offshore wave energy converter of the overtopping type. It consists of two wave reflectors focusing the incoming waves towards a ramp, a reservoir for collecting the overtopping water and a number of hydro turbines for converting the pressure head into power. In the period from 1998 to 2001 extensive wave tank testing on a scale model was carried at Aalborg University. Then, a 57x27m wide and 237tonnes heavy (incl. ballast) prototype of the Wave Dragon, placed in Nissum Bredning, Denmark, was grid connected in May 2003 as the world's first offshore wave energy converter. The prototype is fully equipped with hydro turbines and automatic control systems, and is instrumented in order to monitor power production, wave climate, forces in mooring lines, stresses in the structure and movements of the Wave Dragon. In the period May 2003 to January 2005 an extensive measuring program has been carried out, establishing the background for optimal design of the structure and regulation of the power take off system. Planning for deployment of a 4MW power production unit in the Atlantic by 2007 is in progress. (author)

  18. Systemic microsporidiosis in inland bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Jacobson, E R; Green, D E; Undeen, A H; Cranfield, M; Vaughn, K L

    1998-09-01

    One laboratory-hatched and -reared inland bearded dragon (Pogona vitticeps) (No. 1) and two privately owned inland bearded dragons (Nos. 2 and 3) died, showing nonspecific signs of illness. Light microscopic examination of hematoxylin and eosin-stained tissue sections from lizard No. 1 revealed severe hepatic necrosis with clusters of light basophilic intracytoplasmic microorganisms packing and distending hepatocytes and free in areas of necrosis. Similar microorganisms were within cytoplasmic vacuoles in distended renal epithelial cells, pulmonary epithelial cells, gastric mucosal epithelial cells, enterocytes, and capillary endothelial cells and ventricular ependymal cells in the brain. In lizard Nos. 2 and 3, microorganisms of similar appearance were in macrophages in granulomatous inflammation in the colon, adrenal glands, and ovaries. The microorganism was gram positive and acid fast and had a small polar granule that stained using the periodic acid-Schiff reaction. Electron microscopic examination of deparaffinized liver of lizard No. 1 revealed merogonic and sporogonic stages of a protozoan compatible with members of the phylum Microspora. This report provides the first description of microsporidiosis in bearded dragons and is only the second report of this infection in a lizard.

  19. Devriesea agamarum causes dermatitis in bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Hellebuyck, Tom; Martel, An; Chiers, Koen; Haesebrouck, Freddy; Pasmans, Frank

    2009-03-02

    Devriesea agamarum is frequently isolated from dermatitis in lizards, notably from cheilitis in spiny tailed lizards (genus Uromastyx). It was the aim of the present study to assess the role of this bacterium as a causative agent of dermatitis by fulfilling Koch's postulates. First, its association with diseased lizards was demonstrated. The bacterium was isolated from several, mainly desert dwelling squamate species showing symptoms of dermatitis and/or septicaemia. The affected lizards mainly belonged to the family of the Agamidae (genera Pogona, Uromastyx, Agama) and in one case to the Iguanidae (genus Crotaphytus). Secondly, the occurrence of D. agamarum in 66 clinically healthy bearded dragons, 21 clinically healthy Uromastyx species and 40 squamate eggshells was studied. The bacterium was isolated from the oral cavity of 10 bearded dragons but from none of the healthy Uromastyx species. Hence D. agamarum was found to be part of the oral microbiota in Pogona vitticeps. Finally, bearded dragons (P. vitticeps) were experimentally inoculated with D. agamarum by direct application of a bacterial suspension on intact and abraded skin. At the scarified skin of all inoculated lizards, dermatitis was induced from which D. agamarum was re-isolated. In conclusion, D. agamarum is a facultative pathogenic bacterium, able to cause dermatitis in agamid lizards when the integrity of the skin is breached.

  20. Thermal Relics in Modified Cosmologies: Bounds on Evolution Histories of the Early Universe and Cosmological Boosts for PAMELA

    CERN Document Server

    Catena, R; Pato, M; Pieri, L; Masiero, A

    2010-01-01

    Alternative cosmologies, based on extensions of General Relativity, predict modified thermal histories in the Early Universe in the pre Big Bang Nucleosynthesis (BBN) era, epoch which is not directly constrained by cosmological observations. When the expansion rate is enhanced with respect to the standard case, thermal relics typically decouple with larger relic abundances. The correct value of the relic abundance is therefore obtained for larger annihilation cross sections, as compared to standard cosmology. A direct consequence is that indirect detection rates are enhanced. Extending previous analyses of ours, we derive updated astrophysical bounds on the dark matter annihilation cross sections and use them to constrain alternative cosmologies in the pre-BBN era. We also determine the characteristics of these alternative cosmologies in order to provide the correct value of relic abundance for a thermal relic for the (large) annihilation cross section required to explain the PAMELA results on the positron fr...

  1. CFD study of the overtopping discharge of the Wave Dragon wave energy converter

    DEFF Research Database (Denmark)

    Eskilsson, K.; Palm, J.; Kofoed, Jens Peter

    2015-01-01

    The Wave Dragon is a floating Wave Energy Converter (WEC) working by the overtopping principle. The overtopping discharge has been determined by model scale experiments in wave basins. In the present study we numerically simulate the overtopping behavior of the Wave Dragon device using a VOFbased...

  2. Dragons in English: The Great Change of the Late Nineteenth Century

    Science.gov (United States)

    Cheetham, Dominic

    2014-01-01

    The impetus for the incredible variety found in the modern literary dragon is commonly seen to stem from the creative genius of either E. Nesbit or Kenneth Grahame. However, examination of dragon stories in the late nineteenth century shows that several different authors, on both sides of the Atlantic, were producing similar stories at about the…

  3. Dragons in English: The Great Change of the Late Nineteenth Century

    Science.gov (United States)

    Cheetham, Dominic

    2014-01-01

    The impetus for the incredible variety found in the modern literary dragon is commonly seen to stem from the creative genius of either E. Nesbit or Kenneth Grahame. However, examination of dragon stories in the late nineteenth century shows that several different authors, on both sides of the Atlantic, were producing similar stories at about the…

  4. Power Production Experience from Wave Dragon Prototype Testing in Nissum Bredning

    DEFF Research Database (Denmark)

    Frigaard, Peter; Kofoed, Jens Peter

    The first Wave Dragon prototype power production testing started May 2003 and ended temporarily primo 2005. In the mentioned period Wave Dragon was situated in a corner of Nissum Bredning with relative little amount of wave energy. Main purpose of the tests was demonstration of survivability...

  5. 33 CFR 100.909 - Chinatown Chamber of Commerce Dragon Boat Race; Chicago, IL.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Chinatown Chamber of Commerce Dragon Boat Race; Chicago, IL. 100.909 Section 100.909 Navigation and Navigable Waters COAST GUARD... Chinatown Chamber of Commerce Dragon Boat Race; Chicago, IL. (a) Regulated Area. All waters of the...

  6. 33 CFR 100.1302 - Special Local Regulation, Annual Dragon Boat Races, Portland, Oregon.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Special Local Regulation, Annual Dragon Boat Races, Portland, Oregon. 100.1302 Section 100.1302 Navigation and Navigable Waters COAST... § 100.1302 Special Local Regulation, Annual Dragon Boat Races, Portland, Oregon. (a) Regulated area....

  7. 78 FR 57063 - Special Local Regulations; Jacksonville Dragon Boat Festival; St. Johns River; Jacksonville, FL

    Science.gov (United States)

    2013-09-17

    ... SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Special Local Regulations; Jacksonville Dragon Boat... Jacksonville, Florida during the Jacksonville Dragon Boat Festival, a series of paddle boat races. The event is... is to ensure safety of life on navigable waters of the United States during the Jacksonville...

  8. 33 CFR 100.903 - Harborfest Dragon Boat Race; South Haven, MI.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Harborfest Dragon Boat Race; South Haven, MI. 100.903 Section 100.903 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Dragon Boat Race; South Haven, MI. (a) Regulated Area. A regulated area is established to include...

  9. History of a Journal: the Case of Dragon Magazine (U.S. Edition

    Directory of Open Access Journals (Sweden)

    Héctor Sevillano Pareja

    2012-06-01

    Full Text Available This work study and analyze the history and development of a journal, from its birth, on paper, until its transformation into electronic version. For this analysis we have focused in Dragon Magazine, which was the most important magazine of role playing games (or RPGs published until now, especially with regard to the first commercial RPG, Dungeons & Dragons.

  10. JEM-EUSO Design for Accommodation on the SpaceX Dragon Spacecraft

    Science.gov (United States)

    Christl, Mark

    2013-01-01

    The JEM-EUSO mission has been planned for launch on JAXA's H2 Launch Vehicle. Recently, the SpaceX Dragon spacecraft has emerged as an alternative payload carrier for JEM-EUSO. This paper will discuss a concept for the re-design of JEM-EUSO so that it can be launched on Dragon.

  11. 78 FR 24065 - Special Local Regulation; Tuscaloosa Dragon Boat Races; Black Warrior River; Tuscaloosa, AL

    Science.gov (United States)

    2013-04-24

    ... the Junior League of Tuscaloosa Dragon Boat Races. This event is advertised as scheduled and... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Special Local Regulation; Tuscaloosa Dragon Boat...

  12. 77 FR 23125 - Special Local Regulation; Tuscaloosa Dragon Boat Race; Black Warrior River; Tuscaloosa, AL

    Science.gov (United States)

    2012-04-18

    ... associated with the Jr. League of Tuscaloosa Dragon Boat Races. This event is advertised as scheduled and... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Special Local Regulation; Tuscaloosa Dragon Boat...

  13. A comparison of UVb compact lamps in enabling cutaneous vitamin D synthesis in growing bearded dragons

    NARCIS (Netherlands)

    Diehl, J.J.E.; Baines, F.M.; Heijboer, A.C.; Leeuwen, van J.P.; Kik, M.; Hendriks, W.H.; Oonincx, D.G.A.B.

    2017-01-01

    The effect of exposure to different UVb compact lamps on the vitamin D status of growing bearded dragons (Pogona vitticeps) was studied. Forty-two newly hatched bearded dragons (<24 h old) were allocated to six treatment groups (n = 7 per group). Five groups were exposed to different UVb

  14. Wave Dragon. Test to evaluate hydraulic response. Report phase A

    Energy Technology Data Exchange (ETDEWEB)

    Soerensen, H.C.; Friis-Madsen, E.

    1999-02-01

    Danish Maritime Institute has in the spring 1998 built a model in scale 1:50 of the wave energy converter Wave Dragon. The scale model is based on calculations performed by the inventor Erik Friis-Madsen from the consultant Loewenmark F.R.I. The scale model is tested in the wave tank at Aalborg University, the Hydraulic and Coastal Engineering Laboratory. This report deals with the results from this test (phase A of the test program). The objective of the test series was to get a judgement of the viability of Wave Dragon in extreme sea conditions in the Danish part of the North Sea at a water depth of 30 meters. The test series had to document: The viability of the Wave Dragon in extreme sea conditions up to 100-year waves; the hydraulic response in 7 different sea conditions where forces and movements have been registered. The main findings are: Wave Dragon has the expected behavior, i.e. the converter is able to survive a 100-year storm; An adjustment of the pitch of the converter could improve the energy efficiency; The forces in the mooring system and the junction between wave reflectors and the platform are acceptable. The forces and the movements are registered at 7 different sea conditions. Video recording has been taken during the test. Five of the sea conditions correspond to 'normal' waves in which power will be produced. Two sea conditions correspond to extreme wave situations. The duration of the registration in each sea conditions was approximately 1/2 an hour, i.e. 3.5 hours in scale 1:1. The conclusion is: The planned test series to evaluate the energy performance can start up (phase B of the test program); The energy efficiency is expected to be improved by a slight modification in the geometry of the Wave Dragon. The modifications can include the geometry of the front and the stabilising wing at the rear end of the platform. Further on changes are possible in the stiffness of the junction between the wave reflectors and the platform and

  15. The Mythological Battles Around the World The Images and Meanings of International Dragon-Slayers

    Institute of Scientific and Technical Information of China (English)

    QiguangZhao

    1996-01-01

    Dragons and dragon slayers belong to a system ofsemiology.They are images with messages.Differentcultures in the world have assigned to these imageshistorical limits,conditions of use,and introducedmultiple meanings into them.Dragons do not exist,therefore dragon slayers do not either.However,they have become an artificial existence in most cul-tures,and this existence have passed from a closed,silent existence to an oral state,open to appropria-tion by society,for there is no regulation,either nat-ural or not,which forbids imagination.Few symbols saturate human civilization sobroadly and thoroughly as those of the dragon:proudly flicking its tail across the tapestries of

  16. The Radio Relics and Halo of El Gordo, a Massive $z=0.870$ Cluster Merger

    CERN Document Server

    Lindner, Robert R; Hughes, John P; Battaglia, Nick; Gupta, Neeraj; Knowles, Kenda; Marriage, Tobias A; Menanteau, Felipe; Moodley, Kavilan; Reese, Erik D; Srianand, Raghunathan

    2013-01-01

    We present 610 MHz and 2.1 GHz imaging of the massive SZE-selected z=0.870 cluster merger ACT-CL J0102-4915 (El Gordo), obtained with the GMRT and the ATCA, respectively. We detect two complexes of radio relics separated by 3.4' (1.6 Mpc) along the system's NW-to-SE collision axis that have high integrated polarizations (33%) and steep spectral indices, consistent with creation via Fermi acceleration by shocks in the ICM. From the spectral index of the relics, we compute a Mach number of 2.55 and shock speed of 4300^{+800}_{-500} km/s. With our ATCA data, we compute the Faraday rotation measure across the NW relic and find a mean value of 11 rad/m^2 and standard deviation of 6 rad/m^2. With the integrated line-of-sight gas density derived from new Chandra observations, our RM measurement implies B_parallel~0.01 \\mu G in the cluster outskirts. The extremely narrow shock widths in the relics (0.6. [abridged

  17. The Relic Neutralino Surface at a 100 TeV collider

    CERN Document Server

    Bramante, Joseph; Martin, Adam; Ostdiek, Bryan; Plehn, Tilman; Schell, Torben; Takeuchi, Michihisa

    2014-01-01

    We map the parameter space for MSSM neutralino dark matter which freezes out to the observed relic abundance, in the limit that all superpartners except the neutralinos and charginos are decoupled. In this space of relic neutralinos, we show the dominant dark matter annihilation modes, the mass splittings among the electroweakinos, direct detection rates, and collider cross-sections. The mass difference between the dark matter and the next-to-lightest neutral and charged states is typically much less than electroweak gauge boson masses. With these small mass differences, the relic neutralino surface is accessible to a future 100 TeV hadron collider, which can discover inter-neutralino mass splittings down to 1~GeV and thermal relic dark matter neutralino masses up to 1.5 TeV with a few inverse attobarns of luminosity. This coverage is a direct consequence of the increased collider energy: the Standard Model events with missing transverse momentum in the TeV range have mostly hard electroweak radiation, distin...

  18. Last scattering, relic gravitons and the circular polarization of the CMB

    CERN Document Server

    Giovannini, Massimo

    2010-01-01

    The tensor contribution to the $V$-mode polarization induced by a magnetized plasma at last scattering vanishes exactly. Conversely a polarized background of relic gravitons cannot generate a $V$-mode polarization. The reported results suggest that, in the magnetized $\\Lambda$CDM paradigm, the dominant source of circular dichroism stems from the large-scale fluctuations of the spatial curvature.

  19. Relating the baryon asymmetry to the thermal relic dark matter density

    Science.gov (United States)

    McDonald, John

    2011-04-01

    We present a generic framework, baryomorphosis, which modifies the baryon asymmetry to be naturally of the order of a typical thermal relic weakly interacting massive particle (WIMP) density. We consider a simple scalar-based model to show how this is possible. This model introduces a sector in which a large initial baryon asymmetry is injected into particles (”annihilons”), ϕB, ϕ^B, of mass ˜100GeV-1TeV. ϕBϕ^B annihilations convert the initial ϕB, ϕ^B asymmetry to a final asymmetry with a thermal relic WIMP-like density. This subsequently decays to a conventional baryon asymmetry whose magnitude is naturally related to the density of thermal relic WIMP dark matter. In this way the two coincidences of baryons and dark matter, i.e. why their densities are similar to each other and why they are both similar to a WIMP thermal relic density (the “WIMP miracle”), may be understood. The model may be tested by the production of annihilons at colliders.

  20. Raman spectroscopic analysis of dragon's blood resins-basis for distinguishing between Dracaena(Convallariaceae), Daemonorops(Palmae) and Croton(Euphorbiaceae).

    Science.gov (United States)

    Edwards, Howell G M; de Oliveira, Luiz F C; Prendergast, Hew D V

    2004-02-01

    "Dragon[prime or minute]s blood" is the name applied to the deep-red coloured resin obtained from various plants. The original source in Roman times, used by many cultures and esteemed for its depth of colour and mystical association, was the dragon tree Dracaena cinnabari(Convallariaceae), found only on the Indian Ocean island of Socotra, (Yemen). Additional sources emerged later, including another species of Dracaena, D. draco, from the Canary Islands and Madeira, and species in the genera Daemonorops(Palmae) from South East Asia and Croton(Euphorbiaceae) from tropical parts of both the New and Old Worlds. In this study, examples of dragon's blood resins from the Economic Botany Collections at the Royal Botanic Gardens, Kew, dating from 1851 to 1993, have been analysed non-destructively using Raman spectroscopy. The Raman spectra of well-documented, provenanced specimens have been used to establish the source of specimens of questionable or unknown origin. It has also been possible from the Raman spectra to indicate whether processing of the resins has been undertaken in the preparation of the specimens before their deposition at Kew.

  1. A Comparative Research of English Translation about Chinese Historical Relics

    Institute of Scientific and Technical Information of China (English)

    刘晓萌

    2016-01-01

    Nowadays, China, with a long history and great culture, appeal to more and more foreign travelers come for a visit. In tourism, English is the most essential language in tourism. Tourist materials play important roles for travelers to understand and enjoy Chinese historical sites, but now many mistakes and problems appear in the tourist materials and many introductions of historical sites are not translated appropriately. The present paper presents the current condition and problems in tourism translation. Some tourist materials and translations are adopted to analyze the main differences in Chinese and western culture. This thesis put forward some translation techniques for those who face the translation of tourism materials.

  2. Comparison of the chemical profiles and anti-platelet aggregation effects of two "Dragon's Blood" drugs used in traditional Chinese medicine.

    Science.gov (United States)

    Yi, Tao; Chen, Hu-Biao; Zhao, Zhong-Zhen; Yu, Zhi-Ling; Jiang, Zhi-Hong

    2011-01-27

    "Dragon's Blood" has been used as a medicine since ancient times by many cultures. In traditional Chinese medicine, the resin obtained from Daemonorops draco (RDD) and the resin from Dracaena cochinchinensis (RDC) are equally prescribed as "Dragon's Blood" for facilitating blood circulation. To verify the traditional efficacy and elucidate the mechanism, the present study compared the chemical profiles and the pharmacological effects of two species of "Dragon's Blood" mainly used in China. A UPLC-MS fingerprinting method was developed to compare the chemical profiles of the two medicines. The anti-platelet aggregation effects of the two medicines induced by arachidonic acid (AA) were investigated. The chemical profiles of these two species of "Dragon's Blood" were significantly different. The characteristic constituents were found to be: flavanes in RDD and stilbenes in RDC. In the in vivo platelet inhibition test, performed with the dose of 200 mg/kg on rats, the peak inhibitory effects of RDD and RDC were 35.8% and 27.6%, respectively, compared with the control group. With the in vitro concentrations of 0.2, 0.4 and 0.8 mg/ml, RDD exerted significant inhibition of aggregation by 18.7%, 20.0%, and 61.6%, respectively, and RDC exerted significant inhibition of aggregation by 13.3%, 20.2%, and 31.6%, respectively. The fingerprinting method used here is suitable for distinguishing them. All pharmacological tests indicated that RDD was more potent than RDC against platelet aggregation. Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.

  3. MULTI-FREQUENCY STUDIES OF RADIO RELICS IN THE GALAXY CLUSTERS A4038, A1664, AND A786

    Energy Technology Data Exchange (ETDEWEB)

    Kale, Ruta; Dwarakanath, K. S., E-mail: ruta@iucaa.ernet.in [Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore 560 080 (India)

    2012-01-01

    We present a multi-frequency study of radio relics associated with the galaxy clusters A4038, A1664, and A786. Radio images, integrated spectra, spectral index maps, and fits to the integrated spectra in the framework of the adiabatic compression model are presented. Images of the relic in A4038 at 150, 240, and 606 MHz with the Giant Meterwave Radio Telescope have revealed extended ultra-steep spectrum ({alpha} {approx} -1.8 to -2.7) emission of extent 210 Multiplication-Sign 80 kpc{sup 2}. The model of passively evolving radio lobes compressed by a shock fits the integrated spectrum best. The relic with a circular morphology at the outskirts of the cluster A1664 has an integrated spectral index of {approx} - 1.10 {+-} 0.06 and is best fit by the model of radio lobes lurking for {approx}4 Multiplication-Sign 10{sup 7} yr. The relic near A786 has a curved spectrum and is best fit by a model of radio lobes lurking for {approx}3 Multiplication-Sign 10{sup 7} yr. At 4.7 GHz, a compact radio source, possibly the progenitor of the A786 relic, is detected near the center of the radio relic. The A786 radio relic is thus likely a lurking radio galaxy rather than a site of cosmological shock as has been considered in earlier studies.

  4. The "toothbrush-relic": evidence for a coherent linear 2-Mpc scale shock wave in a massive merging galaxy cluster?

    CERN Document Server

    van Weeren, R J; Intema, H T; Rudnick, L; Bruggen, M; Hoeft, M; Oonk, J B R

    2012-01-01

    Some merging galaxy clusters host diffuse extended radio emission, so-called radio halos and relics. Here we present observations between 147 MHz and 4.9 GHz of a new radio-selected galaxy cluster 1RXS J0603.3+4214 (z=0.225). The cluster is also detected as an extended X-ray source in the RASS. It hosts a large bright 1.9 Mpc radio relic, an elongated ~2 Mpc radio halo, and two smaller radio relics. The large radio relic has a peculiar linear morphology. For this relic we observe a clear spectral index gradient, in the direction towards the cluster center. We performed Rotation Measure (RM) Synthesis between 1.2 and 1.7 GHz. The results suggest that for the west part of the large relic some of the Faraday rotation is caused by ICM and is not only due to galactic foregrounds. We also carried out a detailed spectral analysis of this radio relic and created radio color-color diagrams. We find (i) an injection spectral index of -0.6 to -0.7, (ii) steepening spectral index and increasing spectral curvature in the ...

  5. Multi-frequency studies of radio relics in the galaxy clusters A4038, A1664 and A786

    CERN Document Server

    Kale, Ruta

    2011-01-01

    We present a multi-frequency study of radio relics associated with the galaxy clusters A4038, A1664 and A786. Radio images, integrated spectra, spectral index maps and fits to the integrated spectra in the framework of the adiabatic compression model are presented. Images of the relic in A4038 at 150, 240 and 606 MHz with the Giant Metrewave Radio Telescope have revealed extended ultra-steep spectrum (\\alpha ~ -1.8 to -2.7) emission of an extent 210 x 80 kpc^2. The model of passively evolving radio lobes compressed by a shock best fits the integrated spectrum. The relic with a circular morphology at the outskirts of the cluster A1664 has an integrated spectral index of -1.10+/-0.06 and is best fit by the model of radio lobes lurking for ~ 4x10^7 yr. The relic near A786 has a curved spectrum and is best fit by a model of radio lobes lurking for ~ 3x10^7 yr. At 4.7 GHz, a compact radio source, possibly the progenitor of the A786 relic, is detected near the center of the radio relic. The A786 radio relic is thus...

  6. Deep fungal dermatitis in three inland bearded dragons (Pogona vitticeps) caused by the Chrysosporium anamorph of Nannizziopsis vriesii.

    Science.gov (United States)

    Bowman, Michelle R; Paré, Jean A; Sigler, Lynne; Naeser, John P; Sladky, Kurt K; Hanley, Chris S; Helmer, Peter; Phillips, Lynette A; Brower, Alexandra; Porter, Robert

    2007-06-01

    The Chrysosporium anamorph of Nannizziopsis vriesii (CANV), a keratinophilic fungus that naturally and experimentally causes severe and often fatal dermatitis in multiple reptile species, was isolated in pure culture from skin samples of three inland bearded dragons (Pogona vitticeps) with deep granulomatous dermatomycosis. The first animal presented with a focal maxillary swelling involving the skin and gingiva. This lizard died while undergoing itraconazole and topical miconazole therapy. The second presented with focally extensive discoloration and thickening of the skin of the ventrum and was euthanized after 10 weeks of itraconazole therapy. A third lizard presented with hyperkeratotic exudative dermatitis on a markedly swollen forelimb. Amputation and itraconazole therapy resulted in a clinical cure. Histopathology of tissue biopsies in all cases demonstrated granulomatous dermatitis with intralesional hyphae morphologically consistent with those produced by the CANV. The second lizard also had granulomatous hepatitis with intralesional hyphae. Evidence in this report suggests that the CANV is the etiologic agent of an emerging condition in captive bearded dragons that has been called 'yellow fungus disease'.

  7. The First Report of the Occurrence of Anthracnose Disease Caused by Colletotrichum gloeosporioides (Penz. Penz. & Sacc. on Dragon Fruit (Hylocereus spp. in Peninsular Malaysia

    Directory of Open Access Journals (Sweden)

    Masanto Masyahit

    2009-01-01

    Full Text Available Problem statement: The increasing of dragon fruit (Hylocereus spp. plantations in Malaysia enhances the researches on this crop, particularly focusing on its physico-chemical characteristics, great potential health benefits and nutritional value. However, its scientific report of disease is still lacking, primarily on anthracnose disease. This study was then conducted to investigate the distribution of anthracnose disease on dragon fruit and to correlate its occurrence with weather and cultural data. Approach: Survey and sampling were conducted on dragon fruit-growing areas in Peninsular Malaysia since December 2007 until August 2008 to measure the Disease Incidence (DI and Disease Severity (DS. The diseased stem and fruit were sampled and brought to laboratory for isolation and identification. DI data were plotted with DS and then correlated using Pearson correlation with weather and cultural data. Results: Of the 43 surveyed-farms in 11 states, DI and DS were successfully recorded on three dragon fruit species from 36 farms (83.72%. The infected stem and fruit had reddish-brown lesions with chlorotic haloes symptoms. The lesion had brown centers and coalesced to rot. Based on its whitish-orange colony, septated hypae and capsule-like conidia and the pathogenicity test, the pathogen was identified as Colletotrichum gloeosporioides. One way ANOVA with DMRT test highlighted that the most disease occurrence was found in Malacca (mean of DI and DS, 57.30 and 21.20%, whereas the lowest in Kelantan state (mean of DI and DS, 6.70 and 4.30%. Pearson coefficient correlations were around 0.107-0.261 for relationships between disease occurrence and age of crops and acreage of farm, from-0.049 to-0.237 for disease prevalence with relative humidity and rainfall and around-0.012-0.173 for disease occurrence with monthly temperature, wind velocity and altitude. Conclusion: The occurrence of anthracnose on dragon fruit in Peninsular Malaysia was more

  8. The Role of the Dragon Boat Festival in the Ideological and Political Education%端午节在思想政治教育中的作用分析

    Institute of Scientific and Technical Information of China (English)

    周娟; 李红琼

    2016-01-01

    通过调查发现人们面对外来文化的冲击,对中国端午节日文化存在误解,对端午习俗的记忆与感知逐渐淡漠。造成这种局面出现主要是因为过分强调为国奉献的屈原精神,而忽视了端午节日文化更深层次的文化意蕴。因此为了解决当前思想政治教育包括大学生思想政治教育在内面临的困境,研究端午节日文化对促进思想政治教育的贡献显得极其重要。%Through the survey found that people in the face of the impact of foreign culture, the Chinese Dragon Boat Festival cultural misunderstanding, the customs of the Dragon Boat Festival, the memory and perception gradually indifferent. This situation is mainly due to the excessive emphasis on the dedication of the Qu Yuan spirit of the country, while ignoring the cul-tural connotation of the Dragon Boat Festival festival, a deeper level of culture. Therefore, in order to solve the current ideol-ogical and political education, including college students ideological and political education, it is very important to study the contribution of the Dragon Boat Festival Culture to promote the ideological and political education.

  9. Physiological and physical characteristics of elite dragon boat paddlers.

    Science.gov (United States)

    Ho, Sarah R; Smith, Richard M; Chapman, Philip G; Sinclair, Peter J; Funato, Kazuo

    2013-01-01

    The objectives of this study were to profile the physiological and physical characteristics of elite dragon boat paddlers, to identify characteristics that predict race performance and to quantify the metabolic energy contributions to simulated 200-m and 500-m dragon boat racing. Eleven, national level, male, Japanese dragon boat paddlers completed a battery of tests on a paddling ergometer including an incremental maximal aerobic capacity test, a 2-minute maximal accumulated oxygen deficit (MAOD) test, and simulated 200-m and 500-m races. A physiological and physical profile of subjects was compiled. Results showed that 200-m race performance correlated with flexed arm girth and excess postexercise oxygen consumption (EPOC) measured in the 30 minutes after the MAOD test, whereas 500-m race performance correlated with body fat percentage, relaxed and flexed arm girth, MAOD, EPOC, and peak power during the MAOD test. Stepwise multiple regression revealed that flexed arm girth was the most powerful predictor of 200-m and 500-m race performance, followed by EPOC with the combination of these 2 factors able to explain 74% and 68% of the variance in 200-m and 500-m race performance, respectively. Aerobic energy contributions for 200-m (50 seconds) and 500-m (1 minute 50 seconds) races were (mean (95% confidence intervals)) 52.1% (range, 47.4-56.8%) and 67.5% (range, 60.1-77.8%), respectively. In conclusion, coaches should develop training programs targeted at developing upper-body musculature and increasing anaerobic capacity because these factors are the strongest predictors of 200-m and 500-m race performance. Given the substantial aerobic energy contributions even for a 200-m race event, coaches should aim to increase the maximal aerobic capacity of the paddler in preparation for both 200-m and 500-m events.

  10. An Overview of Zhangye Giant Buddhist Temple and Its Historical Relics%张掖大佛寺及其寺藏文物概述

    Institute of Scientific and Technical Information of China (English)

    王虹; 王康

    2015-01-01

    Zhangye Giant Buddhist Temple is a comprehensive art museum where you can feel all the charms of religion, architecture, calligraphy, sculpture, and painting. The well conserved Buddhist scriptures and thousands of precious historical relics can help us understand and study the local historical development of Buddhism during Ming dynasty and Qing dynasty. There is also great value in both culture and art inheritance. Here the paper gives us an overview of architectural style of Zhangye Giant Buddhist Temple and its rich and colorful historical relics.%张掖大佛寺是一所集宗教、建筑、书法、雕塑、绘画于一身的综合艺术博物馆。其寺内保存完整的佛教经籍,数以万计的文物珍品,对后人了解和研究佛教在明清两代当地的发展历史及文化艺术传承具有极高的指导意义。文章概述了张掖大佛寺的历史和建筑风格及其丰富多彩的寺藏文物。

  11. Dragon (repulsive guidance molecule b, RGMb) is a novel gene that promotes colorectal cancer growth.

    Science.gov (United States)

    Shi, Ying; Chen, Guo-Bin; Huang, Xiao-Xiao; Xiao, Chuan-Xing; Wang, Huan-Huan; Li, Ye-Sen; Zhang, Jin-Fang; Li, Shao; Xia, Yin; Ren, Jian-Lin; Guleng, Bayasi

    2015-08-21

    Colorectal cancer (CRC) is one of the most commonly diagnosed cancers and a major cause of cancer death. However, the molecular mechanisms underlying CRC initiation, growth and metastasis are poorly understood. Dragon (RGMb), a member of the repulsive guidance molecule (RGM) family, has been recently identified as a co-receptor for bone morphogenetic protein (BMP) signaling, but the role of Dragon in CRC development is undefined. Here, we show that Dragon expression was increased in colon cancer tissues compared to control tissues in CAC mouse model and in human patients. Dragon promoted proliferation of CT26.WT and CMT93 colon cancer cells and accelerated tumor growth in the xenograft mouse model. Dragon's action on colon cancer development was mediated via the BMP4-Smad1/5/8 and Erk1/2 pathways. Therefore, our results have revealed that Dragon is a novel gene that promotes CRC growth through the BMP pathway. Dragon may be exploited as a potential therapeutic target for CRC treatment.

  12. Dragon (repulsive guidance molecule b, RGMb) is a novel gene that promotes colorectal cancer growth

    Science.gov (United States)

    Shi, Ying; Chen, Guo-Bin; Huang, Xiao-Xiao; Xiao, Chuan-Xing; Wang, Huan-Huan; Li, Ye-Sen; Zhang, Jin-Fang; Li, Shao; Xia, Yin; Ren, Jian-Lin; Guleng, Bayasi

    2015-01-01

    Colorectal cancer (CRC) is one of the most commonly diagnosed cancers and a major cause of cancer death. However, the molecular mechanisms underlying CRC initiation, growth and metastasis are poorly understood. Dragon (RGMb), a member of the repulsive guidance molecule (RGM) family, has been recently identified as a co-receptor for bone morphogenetic protein (BMP) signaling, but the role of Dragon in CRC development is undefined. Here, we show that Dragon expression was increased in colon cancer tissues compared to control tissues in CAC mouse model and in human patients. Dragon promoted proliferation of CT26.WT and CMT93 colon cancer cells and accelerated tumor growth in the xenograft mouse model. Dragon's action on colon cancer development was mediated via the BMP4-Smad1/5/8 and Erk1/2 pathways. Therefore, our results have revealed that Dragon is a novel gene that promotes CRC growth through the BMP pathway. Dragon may be exploited as a potential therapeutic target for CRC treatment. PMID:26029998

  13. A New Phenylpropanoid Glycoside from Dragon's Blood of Dracaena cambodiana

    Institute of Scientific and Technical Information of China (English)

    SHEN Hai-yan; WANG Hui; ZUO Wen-jian; ZHAO You-xing; LUO Ying; MEI Wen-li; DAI Hao-fu

    2013-01-01

    A new phenylpropanoid glycoside,named cambodianin F(1),together with three known compounds,1-O-β-D-glucopyranosyl-2-hydroxy-4-allylbenzene(2),1-O-(6-O-α-L-rhamnopyranosyl-β-D-glucopyranosyl)-2-hydroxy-4-allylbenzene(3) and 1,2-di-O-β-D-glucopyranosyl-4-allylbenzene(4) was isolated from the dragon's blood of Dracaena cambodiana.The new compound was elucidated by HR-ESI-MS and spectroscopic techniques(UV,IR,1D and 2D NMR).

  14. Male tawny dragons use throat patterns to recognize rivals

    Science.gov (United States)

    Osborne, Louise; Umbers, Kate D. L.; Backwell, Patricia R. Y.; Keogh, J. Scott

    2012-10-01

    The ability to distinguish between familiar and unfamiliar conspecifics is important for many animals, especially territorial species since it allows them to avoid unnecessary interactions with individuals that pose little threat. There are very few studies, however, that identify the proximate cues that facilitate such recognition in visual systems. Here, we show that in tawny dragons ( Ctenophorus decresii), males can recognize familiar and unfamiliar conspecific males based on morphological features alone, without the aid of chemical or behavioural cues. We further show that it is the colour pattern of the throat patches (gular) that facilitates this recognition.

  15. Reactor Simulation for Antineutrino Experiments using DRAGON and MURE

    CERN Document Server

    Jones, C L; Conrad, J M; Djurcic, Z; Fallot, M; Giot, L; Keefer, G; Onillon, A; Winslow, L

    2011-01-01

    Rising interest in nuclear reactors as a source of antineutrinos for experiments motivates validated, fast, and accessible simulations to predict reactor fission rates. Here we present results from the DRAGON and MURE simulation codes and compare them to other industry standards for reactor core modeling. We use published data from the Takahama-3 reactor to evaluate the quality of these simulations against the independently measured fuel isotopic composition. The propagation of the uncertainty in the reactor operating parameters to the resulting antineutrino flux predictions is also discussed.

  16. Biomimetic Synthesis of Complex Flavonoids Isolated from Daemonorops "Dragon's Blood".

    Science.gov (United States)

    Schmid, Matthias; Trauner, Dirk

    2017-09-25

    The dragonbloodins are a pair of complex flavonoid trimers that have been isolated from the palm tree Daemonorops draco, one of the sources of the ancient resin known as "dragon's blood". We present a short synthesis that clarifies their relative configurations and sheds light on their origin in Nature. This synthesis features biomimetic cascade reactions that involve both ionic and radical intermediates. The biogenetic relationships between dracorhodin, the dracoflavans C, and the dragonbloodins A1 and A2 are discussed. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  17. Three new biflavonoids from Chinese dragon's blood, Dracaena cochinchinensis.

    Science.gov (United States)

    Guan, Jing; Guo, Shun-Xing

    2012-05-01

    Three new biflavonoids, named (2RyS)-3'-methoxy-8-methylsocotrin-4'-ol (1), (2SyR)-3'-methoxy-8-methylsocotrin-4'-ol (2), and (2RyR)-8-methylsocotrin-4'-ol (3), were isolated from Chinese Dragon's blood [Dracaena cochinchinensis (Lour.) S. C. Chen], together with two known ones. The structures of these new biflavonoids were elucidated by a combination of HR-ESI-MS, 1H NMR, 13C NMR, HMQC, and HMBC spectra. The absolute configurations of compounds 1-4 were determined by quantum chemical calculation of the circular dichroism spectrum and comparison with the experimental CD spectrum.

  18. Calibration and validation of measurement system. Wave Dragon, Nissum Bredning

    Energy Technology Data Exchange (ETDEWEB)

    Kofoed, J.P-; Riemann, S.; Knapp, W.

    2004-03-01

    This report deals with the calibration of the measuring equipment on board the Wave Dragon, Nissum Bredning (WD-NB) prototype. The report covers the following instruments on board WD-NB: 1) Pressure transducers. 2) Force transducers. 3) Accelerometers. 4) Displacement sensors. 5) Strain gauges. 6) Inclinometers. All of these instruments are connected to the HBM MGC+ amplifier and data acquisition unit. In the following the calibration will be dealt with individually. Furthermore, a preliminary calibration of the siphon and dummy turbines has been carried out and this is also described in the following. (au)

  19. Periorbital adenocarcinoma in a bearded dragon (Pogona vitticeps).

    Science.gov (United States)

    Darrow, Brett G; Johnstone McLean, Nancy S; Russman, Shirley E; Schiller, Chris A

    2013-07-01

    A 4.5-year-old female bearded dragon (Pogona vitticeps) presented for periorbital swelling affecting the left eye. A well-organized, hypoechoic mass was noted ventral and medial to the globe on ocular ultrasound. The mass continued to grow despite antibiotic therapy, and an exenteration was performed. The mass was diagnosed via histopathology and immunohistochemical staining as a probable lacrimal gland carcinoma, although a Harderian gland origin could not definitively be ruled out. The tumor recurred following removal, and the lizard died 2 months postoperatively. © 2013 American College of Veterinary Ophthalmologists.

  20. Research on current situation of development of dragon and lion dance elective course in colleges and countermeasures%普通高校龙狮选项课开展现状与对策研究

    Institute of Scientific and Technical Information of China (English)

    张丹

    2013-01-01

    The strategy to carry out the implementation of the dragon and lion dance option class is feasible or not directly affect teaching effect and the dragon and lion Dance sport in colleges and universities, we must pay attention to. Using the method of literature, logical analysis and other research methods to study the implementation strategy of the ordinary university dragon lion elective course, this paper probes into the status quo, dragon and lion dance courses in colleges and the value of dragon and lion option class, and put forward countermeasures of ordinary university sports option class:create a free space for the students;using a variety of means to enrich the teaching content;the integration of inside and outside class;highlights the geographical and cultural characteristics.%龙狮选项课实施对策是否可行直接影响着教学效果和龙狮运动在高校的开展情况,必须予以重视。运用文献资料法、逻辑分析法等研究方法对普通高校龙狮选项课实施对策进行了研究,文章从高校龙狮课程开展现状、高校开展龙狮选项课的价值等方面进行了探讨并在此基础上提出普通高校舞龙舞狮体育选项课开设的实施对策:为学生选课创造自由空间;采用多种手段充实教学内容;实行课内外一体化;凸显地域文化特色。

  1. When the dragon wore the crown putting starlight back into myth

    CERN Document Server

    Cerow, Don

    2013-01-01

    When our ancestors gazed upon the skies thousands of years ago they looked up into the center of Creation and saw a mighty Dragon, a great celestial serpent with wings circling ceaselessly above them, night after night, century after century. When the Dragon Wore the Crown is a ground breaking book that covers a period of over six thousand years, focusing on what astrologers would call the Ages of Gemini, Taurus and Aries and taking us through the period of classical astronomy with the Greeks and Romans (approx. 7000 BC-200 AD).When the Dragon Wore the Crown opens and closes with the Chinese m

  2. Experimental Modeling of the Overtopping Flow on the Wave Dragon Wave Energy Converter

    DEFF Research Database (Denmark)

    Parmeggiani, Stefano; Kofoed, Jens Peter; Friis-Madsen, Erik

    2011-01-01

    The Wave Dragon Wave Energy Converter is currently facing a precommercial phase. At this stage of development a reliable overtopping model is highly required, in order to predict the performance of the device at possible deployment locations. A model formulation derived for an overtopping device...... with general geometry has been used so far. The paper presents an updated formulation drawn through the tank testing of a scaled model the Wave Dragon. The sensitivity analysis of the main features influencing the overtopping flow led to an updated model formulation which can be specifically suited...... for the Wave Dragon....

  3. Experimental Modeling of the Overtopping Flow on the Wave Dragon Wave Energy Converter

    DEFF Research Database (Denmark)

    Parmeggiani, Stefano; Kofoed, Jens Peter; Friis-Madsen, Erik

    2011-01-01

    The Wave Dragon Wave Energy Converter is currently facing a precommercial phase. At this stage of development a reliable overtopping model is highly required, in order to predict the performance of the device at possible deployment locations. A model formulation derived for an overtopping device...... with general geometry has been used so far. The paper presents an updated formulation drawn through the tank testing of a scaled model the Wave Dragon. The sensitivity analysis of the main features influencing the overtopping flow led to an updated model formulation which can be specifically suited...... for the Wave Dragon....

  4. Development of DRAGON electron cyclotron resonance ion source at Institute of Modern Physics.

    Science.gov (United States)

    Lu, W; Xie, D Z; Zhang, X Z; Xiong, B; Ruan, L; Sha, S; Zhang, W H; Cao, Y; Lin, S H; Guo, J W; Fang, X; Guo, X H; Li, X X; Ma, H Y; Yang, Y; Wu, Q; Zhao, H Y; Ma, B H; Wang, H; Zhu, Y H; Feng, Y C; Li, J Y; Li, J Q; Sun, L T; Zhao, H W

    2012-02-01

    A new room temperature electron cyclotron resonance (ECR) ion source, DRAGON, is under construction at IMP. DRAGON is designed to operate at microwaves of frequencies of 14.5-18 GHz. Its axial solenoid coils are cooled with evaporative medium to provide an axial magnetic mirror field of 2.5 T at the injection and 1.4 T at the extraction, respectively. In comparison to other conventional room temperature ECR ion sources, DRAGON has so far the largest bore plasma chamber of inner diameter of 126 mm with maximum radial fields of 1.4-1.5 T produced by a non-Halbach permanent sextupole magnet.

  5. The Smell of Relics: Authenticating Saintly Bones and the Role of Scent in the Sensory Experience of Medieval Christian Veneration

    Directory of Open Access Journals (Sweden)

    Paul Anthony Brazinski

    2013-09-01

    Full Text Available ''The archaeology of smell is a burgeoning field in recent scholarship. This paper adds to existing literature by investigating the function of smell in relation to relic sales and veneration in medieval Europe, a hitherto understudied area of research. Collating historical texts concerning the translatio of saintly relics in Western Europe and the Byzantine Empire with archaeological sources associated with relic veneration and religious worship (including ampullae, unguentaria, sarcophagi, holy oils, pillow graves, and silk, this paper suggests that (1 smell was used in the medieval world as a means to challenge or confirm a relic’s authenticity, and (2 olfactory liquids that imbued or permeated material objects in the context of worship functioned as a means of focusing attention on relic veneration and were an essential part of the cult and/or pilgrimage experience.

  6. Impact of SUSY-QCD corrections to neutralino-squark coannihilation on the dark matter relic density

    Energy Technology Data Exchange (ETDEWEB)

    Harz, Julia [Deutsches Elektronen-Synchrotron, Hamburg (Germany); Herrmann, Bjoern [Laboratoire d' Annecy de Physique Theorique, Annecy-le-Vieux (France); Klasen, Michael [Institute for Theoretical Physics, University of Muenster (Germany); Kovarik, Karol [Karlsruhe Institute of Technology, Karlsruhe (Germany); Le Boulc' h, Quentin [Laboratoire de Physique Subatomique et de Cosmologie, Grenoble (France)

    2012-07-01

    A powerful method to constrain the parameter space of theories beyond the Standard Model is to compare the predicted dark matter relic density with data from cosmological precision measurements, in particular from the WMAP satellite. On the particle physics side, the main uncertainty on the relic density arises from the (co-)annihilation cross sections of the dark matter particle. After a motivation for including higher order corrections in the prediction of the relic density, the project DM rate at NLO is presented. This software package allows one to compute the neutralino (co-)annihilation cross sections including SUSY-QCD corrections at the one-loop level and to evaluate their effect on the relic density using a link to the public codes MicrOMEGAs and DarkSUSY. Recent results of the impact of SUSY-QCD corrections on the neutralino pair annihilation cross section are discussed, and first results on neutralino-squark coannihilation are shown.

  7. Late Quaternary sea level and environmental changes from relic carbonate deposits of the western margin of India

    Digital Repository Service at National Institute of Oceanography (India)

    Rao, V.P.; Rajagopalan, G.; Vora, K.H.; Almeida, F.

    Relic carbonate deposits along the western margin of India occur as dolomite crusts, aragonite sands (pelletal / oolitic) and aragonite-cemented limestones, oyster shells, corals, encrusted coralline algal and foraminiferal-dominated nodules...

  8. Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9

    Energy Technology Data Exchange (ETDEWEB)

    Bonafede, A.; Brüggen, M. [Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, D-21029 Hamburg (Germany); Intema, H. T. [National Radio Astronomy Observatory, 1003 Lopezville Road, Socorro, NM 87801-0387 (United States); Girardi, M. [Dipartimento di Fisica-Sezione di Astronomia, Universitá di Trieste, via Tiepolo 11, I-34143 Trieste (Italy); Nonino, M. [INAF—Osservatorio Astronomico di Trieste, via Tiepolo 11, I-34143 Trieste (Italy); Kantharia, N. [National center for Radio Astrophysics, TIFR, Post Bag 3, Ganeshkhind, Pune 411 007 (India); Van Weeren, R. J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Röttgering, H. J. A. [Leiden Observatory, Leiden University, 2300 RA Leiden (Netherlands)

    2014-04-10

    Radio relics are diffuse radio sources observed in galaxy clusters, probably produced by shock acceleration during cluster-cluster mergers. Their large size, of the order of 1 Mpc, indicates that the emitting electrons need to be (re)accelerated locally. The usually invoked diffusive shock acceleration models have been challenged by recent observations and theory. We report the discovery of complex radio emission in the Galaxy cluster PLCKG287.0+32.9, which hosts two relics, a radio halo, and several radio filamentary emission. Optical observations suggest that the cluster is elongated, likely along an intergalactic filament, and displays a significant amount of substructure. The peculiar features of this radio relic are that (1) it appears to be connected to the lobes of a radio galaxy and (2) the radio spectrum steepens on either side of the radio relic. We discuss the origins of these features in the context of particle re-acceleration.

  9. Stringy space-time foam, Finsler-like metrics and dark matter relics

    Energy Technology Data Exchange (ETDEWEB)

    Mavromatos, Nick E., E-mail: Nikolaos.Mavromatos@cern.c [CERN, Theory Division, CH-1211 Geneva 23 (Switzerland); King' s College London, Department of Physics, Strand WC2R 2LS, London (United Kingdom); Sarkar, Sarben; Vergou, Ariadne [King' s College London, Department of Physics, Strand WC2R 2LS, London (United Kingdom)

    2011-01-31

    We discuss modifications of the thermal dark matter (DM) relic abundances in stringy cosmologies with D-particle space-time foamy backgrounds. As a result of back-reaction of massive DM on the background space-time, owing to its interaction with D-particle defects in the foam, quantum fluctuations are induced in the space-time metric. We demonstrate that these lead to the presence of extra source terms in the Boltzmann equation used to determine the thermal dark matter relic abundances. The source terms are determined by the specific form of the induced metric deformations; the latter depend on the momentum transfer of the DM particle during its interactions with the D-particle defects and so are akin to Finsler metrics. In the case of low string scales, arising from large extra dimensions, our results may have phenomenological implications for the search of viable supersymmetric models.

  10. Dark matter relics and the expansion rate in scalar-tensor theories

    Science.gov (United States)

    Dutta, Bhaskar; Jimenez, Esteban; Zavala, Ivonne

    2017-06-01

    We study the impact of a modified expansion rate on the dark matter relic abundance in a class of scalar-tensor theories. The scalar-tensor theories we consider are motivated from string theory constructions, which have conformal as well as disformally coupled matter to the scalar. We investigate the effects of such a conformal coupling to the dark matter relic abundance for a wide range of initial conditions, masses and cross-sections. We find that exploiting all possible initial conditions, the annihilation cross-section required to satisfy the dark matter content can differ from the thermal average cross-section in the standard case. We also study the expansion rate in the disformal case and find that physically relevant solutions require a nontrivial relation between the conformal and disformal functions. We study the effects of the disformal coupling in an explicit example where the disformal function is quadratic.

  11. Stochastic Background of Relic Scalar Gravitational Waves tuned by Extended Gravity

    CERN Document Server

    De Laurentis, Mariafelicia

    2009-01-01

    A stochastic background of relic gravitational waves is achieved by the so called adiabatically-amplified zero-point fluctuations process derived from early inflation. It provides a distinctive spectrum of relic gravitational waves. In the framework of scalar-tensor gravity, we discuss the scalar modes of gravitational waves and the primordial production of this scalar component which is generated beside tensorial one. Then we analyze different viable $f(R)$-gravities towards the Solar System tests and stochastic gravitational waves background. The aim is to achive experimental bounds for the theory at local and cosmological scales in order to select models capable of addressing the accelerating cosmological expansion without cosmological constant but evading the weak field constraints. It is demonstrated that viable $f(R)$-gravities under consideration not only satisfy the local tests, but additionally, pass the PPN-and stochastic gravitational waves bounds for large classes of parameters.

  12. Stochastic Background of Relic Scalar Gravitational Waves tuned by Extended Gravity

    Energy Technology Data Exchange (ETDEWEB)

    De Laurentis, Mariafelicia; Capozziello, Salvatore [Dipartimento di Scienze Fisiche, Universita di Napoli ' Federico II' , INFN Sez. di Napoli, Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126, Napoli (Italy)

    2009-10-15

    A stochastic background of relic gravitational waves is achieved by the so called adiabatically-amplified zero-point fluctuations process derived from early inflation. It provides a distinctive spectrum of relic gravitational waves. In the framework of scalar-tensor gravity, we discuss the scalar modes of gravitational waves and the primordial production of this scalar component which is generated beside tensorial one. Then analyze seven different viable f(R)-gravities towards the Solar System tests and stochastic gravitational waves background. It is demonstrated that seven viable f(R)-gravities under consideration not only satisfy the local tests, but additionally, pass the above PPN-and stochastic gravitational waves bounds for large classes of parameters.

  13. Wireless sensor networks in relic protection: deployment methodology and cross-layer design

    Institute of Scientific and Technical Information of China (English)

    Li Dong; Liu Wei; Hui Chunli; Huang Changcheng; Cui Li

    2009-01-01

    This paper describes the deployment optimization technology and the cross-layer design of a surveillance WSN system applied in relic protection. Facing the typical technical challenges in the application context of relic protection, we firstly propose a deployment technology based on ant colony optimization algorithm (DT-ACO) to overcome the difficulties in communication connectivity and sensing coverage. Meanwhile, DT-ACO minimizes the overall cost of the system as much as possible. Secondly we propose a novel power-aware cross-layer scheme (PACS) to facilitate adjustable system lifetime and surveillance accuracy. The performance analysis shows that we achieve lower device cost, significant extension of the system lifetime and improvement on the data delivery rate compared with the traditional methods.

  14. Quintessential Inflation on the Brane and the Relic Gravity Wave Background

    CERN Document Server

    Sami, M

    2004-01-01

    Quintessential inflation describes a scenario in which both inflation and dark energy (quintessence) are described by the same scalar field. In conventional braneworld models of quintessential inflation gravitational particle production is used to reheat the universe. This reheating mechanism is very inefficient and results in an excessive production of gravity waves which violate nucleosynthesis constraints and invalidate the model. We describe a new method of realizing quintessential inflation on the brane in which inflation is followed by `instant preheating' (Felder, Kofman & Linde 1999). The larger reheating temperature in this model results in a smaller amplitude of relic gravity waves which is consistent with nucleosynthesis bounds. The relic gravity wave background has a `blue' spectrum at high frequencies and is a generic byproduct of successful quintessential inflation on the brane.

  15. Model for Thermal Relic Dark Matter of Strongly Interacting Massive Particles.

    Science.gov (United States)

    Hochberg, Yonit; Kuflik, Eric; Murayama, Hitoshi; Volansky, Tomer; Wacker, Jay G

    2015-07-10

    A recent proposal is that dark matter could be a thermal relic of 3→2 scatterings in a strongly coupled hidden sector. We present explicit classes of strongly coupled gauge theories that admit this behavior. These are QCD-like theories of dynamical chiral symmetry breaking, where the pions play the role of dark matter. The number-changing 3→2 process, which sets the dark matter relic abundance, arises from the Wess-Zumino-Witten term. The theories give an explicit relationship between the 3→2 annihilation rate and the 2→2 self-scattering rate, which alters predictions for structure formation. This is a simple calculable realization of the strongly interacting massive-particle mechanism.

  16. Thermal relic abundance of the lightest Kaluza-Klein particle in phenomenological universal extra dimension models

    CERN Document Server

    Ishigure, Yoshiaki; Santa, Akiteru

    2016-01-01

    Universal extra dimension models with Kaluza-Klein parity provide us excellent candidates for dark matter. We consider phenomenological universal extra dimension models where the Kaluza-Klein (KK) mass spectrum is different from that of the minimal universal extra dimension model, and compute the thermal relic abundance of the first KK mode of the photon taking into account the production of second KK particles. It is pointed out that its thermal relic abundance depends significantly on the mass degeneracy between the KK-photon and other KK particles because of considerable coannihilation effects. The cosmologically favored compactification scale is shown to range from around 1 TeV to a few TeV even in the cases where one of the first KK particles is tightly degenerate with the first KK photon in mass.

  17. The toothbrush-relic: evidence for a coherent 3-Mpc scale shock wave ?

    Science.gov (United States)

    Rottgering, Huub

    2010-10-01

    Recently, we have discovered an amzing 3 Mpc radio relic. Its coherent linear morphology and enormous size are very difficult to understand in the standard scenario that relics trace shocks in the ICM induced by massive cluster mergers. With our proposed observations we will determine (i) the presence of shock waves and their properties, (ii) the number of merging sub-clusters and dynamical state of the cluster, and (iii) the temperature structure of the ICM. This will allow us then to address the following questions: (1) are we witnessing a very special configuration consisting of multiple merging events that collectively conspire to yield a linear structure? (2) is there a compelling need for a more sophisticated particle acceleration mechanism?

  18. Detecting relic gravitational waves in the CMB: The contamination caused by the cosmological birefringence

    Directory of Open Access Journals (Sweden)

    Wen Zhao

    2014-10-01

    Full Text Available The B-mode polarization of the cosmic microwave background (CMB radiation is an excellent information channel for the detection of relic gravitational waves. However, the detection is contaminated by the B-mode polarization generated by some other effects. In this paper, we discuss the contaminations caused by the cosmological birefringence, which converts the CMB E-mode to the B-mode, and forms the effective noise for the detection of gravitational waves. We find that this contamination is significant, if the rotation angle is large. However, this kind of B-mode can be properly de-rotated, and the effective noises can be greatly reduced. We find that, comparing with the contaminations caused by cosmic weak lensing, the residual polarization generated by the cosmological birefringence is negligible for the detection of relic gravitational waves in the CMB.

  19. Electrogravitational Resonance of a Gaussian Beam to a High-Frequency Relic Gravitational Wave

    Institute of Scientific and Technical Information of China (English)

    李芳昱; 唐孟希

    2001-01-01

    We consider the resonant response of a Gaussian beam passing through a static magnetic field to a high-frequency relic gravitational wave (GW). It is found that under the synchroresonance condition, the first-order perturbative electromagnetic energy fluxes will contain a "left circular wave" and a "right circular wave" around the symmetrical axis of the Gaussian beam, but the perturbative effects produced by the + and × polarization of the GW have a different physical behaviour. For the high-frequency relic GW with vg = 1010 Hz, h = l0-30, recently expected by the quintessential inflationary models, the corresponding perturbative photon flux passing through the region 10-2 m2 would be expected to be 104 s-1. This is the largest perturbative photon flux we have recently analysed and estimated using the typical laboratory parameters.

  20. Constructing Teaching Model for Training English Guides of Stone In-scription Relics

    Institute of Scientific and Technical Information of China (English)

    李慧

    2016-01-01

    A teaching model based on constructivism is proposed in this paper. The model contains five teaching steps, e.g. inter-pretation teaching, questioning-dialogue, knowledge and skills teaching, discussion-collaboration and field training. Practice proves that it can effectively improve the training efficiency of the training of English guides of stone inscription relics and en-hance their interpretation quality and English skills.

  1. Energy-Momentum Pseudo-Tensor of Relic Gravitational Wave of Both the Polarized States

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xian-Hong; LI Fang-Yu

    2006-01-01

    Unlike usual celestial gravitational waves, the relic gravitational waves (RGWs) form random signals in curved spacetime background. We calculate the energy-momentum pseudo-tensor of a certain component of the RGWs propagating along arbitrary directions in Cartesian coordinates. It is found that the energy density of RGWs is positive definitely, and the momentum density components have reasonable behaviour. Such results may provide a theoretical basis for the detection of RGWs.

  2. Cosmological evolution of thermal relic particles in $f(R)$ gravity

    CERN Document Server

    Capozziello, S; Lambiase, G; Pizza, L

    2015-01-01

    By considering $f(R)$ gravity models, the cosmic evolution is modified with respect to the standard $\\Lambda$CDM scenario. In particular, the thermal history of particles results modified. In this paper, we derive the evolution of relics particles (WIMPs) assuming a reliable $f(R)$ cosmological solution and taking into account observational constraints. The connection to the PAMELA experiment is also discussed. Results are consistent with constraints coming from BICEP2 and PLANCK experiments.

  3. Implications for the Cosmological Landscape: Can Thermal Inputs from a Prior Universe Account for Relic Graviton Production?

    CERN Document Server

    Beckwith, A W

    2008-01-01

    We present a way to accomodate relic graviton production via worm hole transitions of prior universe thermal / energy density values to our present universe. This is done in the context of providing a mechanism for thermally driven relic gravitons, and also to explain how Park's 2003 observation as to how a thermally scaled vacuum energy value plays a role in forming the early universe emergent field dynamics

  4. Polyandry in dragon lizards: inbred paternal genotypes sire fewer offspring.

    Science.gov (United States)

    Frère, Celine H; Chandrasoma, Dani; Whiting, Martin J

    2015-04-01

    Multiple mating in female animals is something of a paradox because it can either be risky (e.g., higher probability of disease transmission, social costs) or provide substantial fitness benefits (e.g., genetic bet hedging whereby the likelihood of reproductive failure is lowered). The genetic relatedness of parental units, particularly in lizards, has rarely been studied in the wild. Here, we examined levels of multiple paternity in Australia's largest agamid lizard, the eastern water dragon (Intellagama lesueurii), and determined whether male reproductive success is best explained by its heterozygosity coefficient or the extent to which it is related to the mother. Female polyandry was the norm: 2/22 clutches (9.2%) were sired by three or more fathers, 17/22 (77.2%) were sired by two fathers, and only 3/22 (13.6%) clutches were sired by one father. Moreover, we reconstructed the paternal genotypes for 18 known mother-offspring clutches and found no evidence that females were favoring less related males or that less related males had higher fitness. However, males with greater heterozygosity sired more offspring. While the postcopulatory mechanisms underlying this pattern are not understood, female water dragons likely represent another example of reproduction through cryptic means (sperm selection/sperm competition) in a lizard, and through which they may ameliorate the effects of male-driven precopulatory sexual selection.

  5. The behavioural consequences of sex reversal in dragons

    Science.gov (United States)

    Li, Hong; Holleley, Clare E.; Elphick, Melanie; Georges, Arthur

    2016-01-01

    Sex differences in morphology, physiology, and behaviour are caused by sex-linked genes, as well as by circulating sex-steroid levels. Thus, a shift from genotypic to environmental sex determination may create an organism that exhibits a mixture of male-like and female-like traits. We studied a lizard species (Central Bearded Dragon, Pogona vitticeps), in which the high-temperature incubation of eggs transforms genetically male individuals into functional females. Although they are reproductively female, sex-reversed dragons (individuals with ZZ genotype reversed to female phenotype) resemble genetic males rather than females in morphology (relative tail length), general behaviour (boldness and activity level), and thermoregulatory tactics. Indeed, sex-reversed ‘females’ are more male-like in some behavioural traits than are genetic males. This novel phenotype may impose strong selection on the frequency of sex reversal within natural populations, facilitating rapid shifts in sex-determining systems. A single period of high incubation temperatures (generating thermally induced sex reversal) can produce functionally female individuals with male-like (or novel) traits that enhance individual fitness, allowing the new temperature-dependent sex-determining system to rapidly replace the previous genetically based one.

  6. Thermoregulation and aggregation in neonatal bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Khan, Jameel J; Richardson, Jean M L; Tattersall, Glenn J

    2010-05-11

    Ectothermic vertebrates, such as reptiles, thermoregulate behaviorally by choosing from available temperatures in their environment. As neonates, bearded dragons (Pogona vitticeps) are often observed to aggregate in vertical strata. A proximate mechanism for this behavior is the thermal advantage of heat storage (i.e., grouped lizards benefit through a decreased surface area to volume ratio), although competition for limited thermal resources, or aggregation for social reasons are alternative explanations. This study was designed to gain an understanding of how aggregation and thermoregulation interact. We observed that both isolated and grouped individuals achieved a similar level of thermoregulation (mean T(b) over trial) within a thermal gradient, but that individuals within a group had lower thermoregulatory precision. An experimental design in which light and ambient temperature (T(a)) (20 versus 30 degrees C) were altered established that a light bulb (source of heat) was a limited and valuable resource to both isolated and grouped neonatal lizards. Lizards aggregated more when the light was on at both temperatures, suggesting that individuals were equally attracted to or repelled from the heat source, depending on the ambient temperature. These data suggest aggregation occurs in neonatal bearded dragons through mutual attraction to a common resource. Further, increased variability in thermal preference occurs in groups, demonstrating the potential for agonistic behaviors to compromise optimal thermoregulation in competitive situations, potentially leading to segregation, rather than aggregation. Crown Copyright 2010. Published by Elsevier Inc. All rights reserved.

  7. Encephalitozoonosis in two inland bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Richter, B; Csokai, J; Graner, I; Eisenberg, T; Pantchev, N; Eskens, H U; Nedorost, N

    2013-02-01

    Microsporidiosis is reported rarely in reptiles. Sporadic multisystemic granulomatous disease of captive bearded dragons (Pogona vitticeps) has been associated with microsporidia showing Encephalitozoon-like morphology. Two such cases are described herein. Both animals displayed clinical signs suggestive of renal failure. Necropsy examination revealed granulomatous lesions in the liver and adrenal area in both animals, and in several other organs in one animal. The lesions were associated with intracellular protozoa consistent with microsporidia. Ultrastructural examination of the organisms revealed morphology similar to Encephalitozoon spp. Immunohistochemistry and chromogenic in-situ hybridization for Encephalitozoon cuniculi were positive in both animals. Nucleotide sequencing of the partial small subunit ribosomal RNA gene and the complete internal transcribed spacer (ITS) region revealed high similarity with published E. cuniculi sequences in both animals. However, the ITS region showed a GTTT-repeat pattern distinct from mammalian E. cuniculi strains. This may be a novel E. cuniculi strain associated with multisystemic granulomatous disease in bearded dragons. Copyright © 2012 Elsevier Ltd. All rights reserved.

  8. Near Surface Magnetic Survey for Investigating the Cultural Relics in Suchon, Gongju, Korea

    Science.gov (United States)

    Islam, M. R.; Tiampo, K.; Suh, M.; Abdallatif, T. F.

    2009-05-01

    A magnetic study by the FM256 Fluxgate Gradiometer was conducted in Suchon, Gongju to measure the vertical magnetic gradient of the Earth's magnetic field and to give further details of the shallow section. The region was divided into two separate areas. The first study area measured 40m by 20m while the second study area was 20m x 20m. Each was subsequently divided into four grids of dimension 20m by 10m and 10m by 10m respectively. Measurements of the vertical magnetic gradient were conducted through successive zigzag traverses. The sample-interval and the traverse-interval were set to specifically record small anomalies at a high resolution. A total of 3200 readings were measured at the first study area and 1600 at the second study area. The data have been downloaded, presented and processed through the Geoplot software to remove the spikes, grid discontinuities, and traverses stripes, and also to enhance the display and smooth the data using the Gaussian low-pass filtering techniques. The vertical gradient of the processed data over the second study area ranges from -34nT to + 21nT, while it ranges from -36nT to + 62nT at the first study area. The gradiometer results defined several positive and negative magnetic anomalies, which revealed the existence of several subsurface features of different shapes and sizes. A comparison between the processed magnetic images suggest that the subsurface features may include a room structure (e.g. hut), a cave-shaped stone chamber tomb, an accumulation of potteries and porcelains common in the Baekje period in the ancient Korean history. The biggest anomaly (3 m in diameter) may illuminate a quartzite tomb chamber. As a result, the study area has great archaeological interest.

  9. DISCOVERY OF GIANT RELIC RADIO LOBES STRADDLING THE CLASSICAL DOUBLE RADIO GALAXY 3C452

    Energy Technology Data Exchange (ETDEWEB)

    Sirothia, S. K.; Gopal-Krishna [National Centre for Radio Astrophysics, TIFR, Post Bag No. 3, Pune University Campus, Ganeshkhind, Pune 411 007 (India); Wiita, Paul J., E-mail: sirothia@ncra.tifr.res.in, E-mail: krishna@ncra.tifr.res.in, E-mail: wiitap@tcnj.edu [Department of Physics, College of New Jersey, P.O. Box 7718, Ewing, NJ 08628 (United States)

    2013-03-01

    We report the discovery of a pair of megaparsec size radio lobes of extremely steep spectrum straddling the well-known classical double radio source 3C452. The existence of such fossil lobes was unexpected since for the past several decades this powerful radio galaxy has been regarded as a textbook example of an edge-brightened double radio source of Fanaroff-Riley type II (FR II), which we now show to be a bona fide ''double-double'' radio galaxy (DDRG). Thus, 3C452 presents a uniquely robust example of recurrent nuclear activity in which the restarted jets are expanding non-relativistically within the relic synchrotron plasma from an earlier active phase and hence the inner double fed by them has evolved into a perfectly normal FR II radio source. This situation contrasts markedly with the strikingly narrow inner doubles observed in a few other DDRGs that have been interpreted in terms of compression of the synchrotron plasma of the relic outer lobes at the relativistic bow-shocks driven by the near ballistic propagation of the two inner jets through the relic plasma. A key ramification of this finding is that it cautions against the currently widespread use of FR II classical double radio sources for testing cosmological models and unification schemes for active galactic nuclei.

  10. RELIC: a novel dye-bias correction method for Illumina Methylation BeadChip.

    Science.gov (United States)

    Xu, Zongli; Langie, Sabine A S; De Boever, Patrick; Taylor, Jack A; Niu, Liang

    2017-01-03

    The Illumina Infinium HumanMethylation450 BeadChip and its successor, Infinium MethylationEPIC BeadChip, have been extensively utilized in epigenome-wide association studies. Both arrays use two fluorescent dyes (Cy3-green/Cy5-red) to measure methylation level at CpG sites. However, performance difference between dyes can result in biased estimates of methylation levels. Here we describe a novel method, called REgression on Logarithm of Internal Control probes (RELIC) to correct for dye bias on whole array by utilizing the intensity values of paired internal control probes that monitor the two color channels. We evaluate the method in several datasets against other widely used dye-bias correction methods. Results on data quality improvement showed that RELIC correction statistically significantly outperforms alternative dye-bias correction methods. We incorporated the method into the R package ENmix, which is freely available from the Bioconductor website ( https://www.bioconductor.org/packages/release/bioc/html/ENmix.html ). RELIC is an efficient and robust method to correct for dye-bias in Illumina Methylation BeadChip data. It outperforms other alternative methods and conveniently implemented in R package ENmix to facilitate DNA methylation studies.

  11. Deep XMM-Newton Observations of the NW Radio Relic Region of Abell 3667

    CERN Document Server

    Sarazin, Craig L; Wik, Daniel R; Clarke, Tracy E

    2016-01-01

    The results of long XMM-Newton X-ray observations of the NW radio relic of Abell 3667 are presented. A shock is detected at the sharp outer edge of the radio relic, both in the X-ray surface brightness and the temperature profiles. The Mach number is M = 2.54^+0.80_-0.43. The temperature jump at the shock is larger than expected from the density jump, which may indicate that a dynamically important magnetic field aligned primarily parallel to the shock front is present. The gas temperature rises gradually over several arc minutes within the shock region. This could indicate that the shock energy is initially dissipated into some mix of thermal and nonthermal (e.g., turbulence) components, and that the nonthermal energy decays into heat in the post-shock region. The observed radio relic can be powered if ~0.2% of the energy dissipated in the shock goes into the (re)acceleration of relativistic electrons. We show that the observed steepening of the radio spectrum with distance behind the shock is consistent wit...

  12. Relic abundance in a secluded dark matter scenario with a massive mediator

    Science.gov (United States)

    Okawa, Shohei; Tanabashi, Masaharu; Yamanaka, Masato

    2017-01-01

    The relic abundance of the dark matter (DM) particle d is studied in a secluded DM scenario, in which the d number decreasing process dominantly occurs not through the pair annihilation of d into the standard model particles, but via the d d →m m scattering process with a subsequently decaying mediator particle m . It is pointed out that the cosmologically observed relic abundance of DM can be accomplished even with a massive mediator having a mass mm non-negligibly heavy compared with the DM particle mass md. In the degenerated d -m case (md=mm), the DM relic abundance is realized by adjusting the d d →m m scattering amplitude large enough and by choosing an appropriate mediator particle lifetime. The DM evolution in the early universe exhibits characteristic "terrace" behavior, or two-step number density decreasing behavior, having a "fake" freeze-out at the first step. Based on these observations, a novel possibility of the DM model buildings is introduced in which the mediator particle m is unified with the DM particle d in an approximate dark symmetry multiplet. A pionic DM model is proposed to illustrate this idea in a renormalizable field theory framework.

  13. The "toothbrush-relic": evidence for a coherent linear 2-Mpc scale shock wave in a massive merging galaxy cluster?

    Science.gov (United States)

    van Weeren, R. J.; Röttgering, H. J. A.; Intema, H. T.; Rudnick, L.; Brüggen, M.; Hoeft, M.; Oonk, J. B. R.

    2012-10-01

    Some merging galaxy clusters host diffuse extended radio emission, so-called radio halos and relics, unrelated to individual galaxies. The origin of these halos and relics is still debated, although there is compelling evidence now that they are related to cluster merger events. Here we present detailed Westerbork Synthesis Radio Telescope (WSRT) and Giant Metrewave Radio Telescope (GMRT) radio observations between 147 MHz and 4.9 GHz of a new radio-selected galaxy cluster 1RXS J0603.3+4214, for which we find a redshift of 0.225. The cluster is detected as an extended X-ray source in the ROSAT All Sky Survey with an X-ray luminosity of LX, 0.1-2.4 keV ~ 1 × 1045 erg s-1. The cluster hosts a large bright 1.9 Mpc radio relic, an elongated ~2 Mpc radio halo, and two fainter smaller radio relics. The large radio relic has a peculiar linear morphology. For this relic we observe a clear spectral index gradient from the front of the relic towards the back, in the direction towards the cluster center. Parts of this relic are highly polarized with a polarization fraction of up to 60%. We performed rotation measure (RM) synthesis between 1.2 and 1.7 GHz. The results suggest that for the west part of the large relic some of the Faraday rotation is caused by the intracluster medium and not only due to galactic foregrounds. We also carried out a detailed spectral analysis of this radio relic and created radio color-color diagrams. We find (i) an injection spectral index of -0.6 to -0.7; (ii) steepening spectral index and increasing spectral curvature in the post-shock region; and (iii) an overall power-law spectrum between 74 MHz and 4.9 GHz with α = -1.10 ± 0.02. Mixing of emission in the beam from regions with different spectral ages is probably the dominant factor that determines the shape of the radio spectra. Changes in the magnetic field, total electron content, or adiabatic gains/losses do not play a major role. A model in which particles are (re)accelerated in a

  14. Experimental Update of the Overtopping Model Used for the Wave Dragon Wave Energy Converter

    DEFF Research Database (Denmark)

    Parmeggiani, Stefano; Kofoed, Jens Peter; Friis-Madsen, Erik

    2013-01-01

    An overtopping model specifically suited for Wave Dragon is needed in order to improve the reliability of its performance estimates. The model shall be comprehensive of all relevant physical processes that affect overtopping and flexible to adapt to any local conditions and device configuration....... An experimental investigation is carried out to update an existing formulation suited for 2D draft-limited, low-crested structures, in order to include the effects on the overtopping flow of the wave steepness, the 3D geometry of Wave Dragon, the wing reflectors, the device motions and the non-rigid connection...... of which can be measured in real-time. Instead of using new fitting coefficients, this approach allows a broader applicability of the model beyond the Wave Dragon case, to any overtopping WEC or structure within the range of tested conditions. Predictions reliability of overtopping over Wave Dragon...

  15. A new dihydrochalcone from dragon's blood, red resin of Dracaena cochinchinensis.

    Science.gov (United States)

    Yong, Ke-Lan; Lv, Jing-Ci; Zhang, Tian-Bao; Xu, Lu-Rong; Chen, Xu

    2008-12-01

    A new dihydrochalcone, 4'-hydroxy-4,2'-dimethoxy-dihydrochalcone, was isolated from Chinese dragon's blood, the red resin of Dracaena cochinchinensis. Its structure was established by spectrum analysis.

  16. Ice Dragon: A Mission to Address Science and Human Exploration Objectives on Mars

    Science.gov (United States)

    Stoker, C.; Davilla, A.; Davis, S.; Glass, B.; Gonzales, A.; Heldmann, J.; Karcz, J.; Lemke, L.; Sanders, G.

    2012-06-01

    We present a mission concept where a SpaceX Dragon capsule lands a payload on Mars that samples ground ice to search for evidence of life, assess hazards to future human missions, and demonstrate use of Martian resources.

  17. Review on the Developing Status of Dragon Dancing Movement%舞龙运动发展现状综述

    Institute of Scientific and Technical Information of China (English)

    徐启龙

    2012-01-01

    舞龙运动是中华民族的艺术魂宝,本文通过对舞龙运动的国内发展现状,国际发展现状,高校开展现状进行综述,更好的了解舞龙运动的开展状况,进一步探讨舞龙运动的未来发展趋势。%Dragon dancing movement is a chinese national soul art treasure,by summarizing present situation of domestic dragon dancing movement,present situation of international dragon dancing movement,current situation of university of dragon dancing movement,this paper has knew the dragon dancing movement well,explored the future trends of dragon dancing movement.

  18. Red Dragon: Low-cost Access to the Surface of Mars using Commercial Capabilities

    Science.gov (United States)

    Karcz, John; Davis, S. M.; Aftosmis, M. J.; Allen, G. A.; Bakhtian, N. M.; Dyakonov, A. A.; Edquist, K. T.; Glass, B. J.; Gonzales, A. A.; Heldmann, J. L.; hide

    2012-01-01

    We will discuss the feasibility of using a minimally-modified variant of a SpaceX Dragon capsule as a low-cost, large-capacity, near-term, Mars lander for scientific and human-precursor missions. We have been evaluating such a Red Dragon platform as an option for a Discovery Program mission concept. A Red Dragon lander has the potential to be low cost primarily because it would be derived from a routinely-flying spacecraft. Dragon is being developed to ferry cargo and crew to and from the International Space Station (ISS). The cargo variant is currently undergoing test flights, which will be followed by standard ISS cargo missions and, eventually, crewed flights. The human variant, unlike other Earth-return vehicles, appears to also have most of the capabilities necessary to land on Mars. In particular, it has a set of high-thrust, throttleable, storable bi-propellant Super- Draco engines integrated directly into the capsule which are intended for launch abort and powered landings on Earth. These thrusters suggest the possibility of a parachute-free, fully-propulsive deceleration at Mars from supersonic speeds to the surface. Concepts for large, human-relevant landers (see, e.g., [1]) also often employ supersonic retro-propulsion; Red Dragon's entry, descent, and landing approach would scale to those landers. Further, SpaceX's Falcon Heavy launch vehicle, currently under development and expected to have its first flight in 2013, will be capable of sending Dragon on a trajectory to Mars. We will discuss our motivation for exploring a Red Dragon lander, the primary technical questions which determine its feasibility, and the current results of our analysis. In particular, we will examine entry, descent, and landing (EDL) in detail. We will describe the modifications to Dragon necessary for interplanetary cruise, EDL, and operations on the Martian surface.

  19. Model Testing of Hydraulic Damping of the Reflector Joint on Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter

    Further development of the Wave Dragon wave energy converter in preparation for full-scale demonstration in the North Sea, PHASE A. FU4305, A4305 & ENS j.nr. 7903-030......Further development of the Wave Dragon wave energy converter in preparation for full-scale demonstration in the North Sea, PHASE A. FU4305, A4305 & ENS j.nr. 7903-030...

  20. Model Testing of Hydraulic Damping of the Reflector Joint on Wave Dragon

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter

    Further development of the Wave Dragon wave energy converter in preparation for full-scale demonstration in the North Sea, PHASE A. FU4305, A4305 & ENS j.nr. 7903-030......Further development of the Wave Dragon wave energy converter in preparation for full-scale demonstration in the North Sea, PHASE A. FU4305, A4305 & ENS j.nr. 7903-030...

  1. The Silver Dragon and the Golden Fish: an imperial Ottoman symbol

    OpenAIRE

    Alexander, David

    2003-01-01

    This article studies and catalogues a group of ottoman swords decorated with dragon and fish emblems on their hilts. Both animals were associated to the imperial power according the oriental traditon.

    Este trabajo estudia y cataloga un grupo de espadas otomanas decoradas con dragones y peces en sus empuñaduras. Estos animales fueron asociados con el poder imperial según la tradición oriental.

  2. The Silver Dragon and the Golden Fish: an imperial Ottoman symbol

    Directory of Open Access Journals (Sweden)

    Alexander, David

    2003-12-01

    Full Text Available This article studies and catalogues a group of ottoman swords decorated with dragon and fish emblems on their hilts. Both animals were associated to the imperial power according the oriental traditon.

    Este trabajo estudia y cataloga un grupo de espadas otomanas decoradas con dragones y peces en sus empuñaduras. Estos animales fueron asociados con el poder imperial según la tradición oriental.

  3. Dermatomycosis caused by Paranannizziopsis australasiensis in five tuatara (Sphenodon punctatus) and a coastal bearded dragon (Pogona barbata) in a zoological collection in New Zealand.

    Science.gov (United States)

    Masters, N J; Alexander, S; Jackson, B; Sigler, L; Chatterton, J; Harvey, C; Gibson, R; Humphrey, S; Rawdon, T G; Spence, R P; Ha, H J; McInnes, K; Jakob-Hoff, R

    2016-09-01

    Health monitoring of tuatara (Sphenodon punctatus) at Auckland Zoo between 2001 and 2009 showed that 58/93 tuatara had been affected by dermatitis of unknown origin. From 2011 onwards, cases of suspected fungal dermatitis underwent extensive diagnostic investigations. Six cases of dermatomycosis were attributed to Paranannizziopsis australasiensis, five in tuatara and one in a coastal bearded dragon (Pogona barbata). Cases presented typically as raised, yellow to brown encrustations on the skin. Severe cases progressed to necrotising ulcerative dermatitis, and in the bearded dragon to fatal systemic mycosis. Following topical and systemic treatments, lesions resolved in all five tuatara. Histopathological examination of skin biopsy samples revealed dermatitis with intralesional septate branching hyphae. Fungal culture yielded isolates morphologically resembling Chrysosporium species, and isolates were submitted for molecular confirmation and sequencing of DNA. All six cases were confirmed as dermatitis due to infection with P. australasiensis, on the basis of fungal culture and DNA sequencing of isolates. These are the first reported cases of dermatomycosis associated with P. australasiensis infection in tuatara, and the first cases in which systemic therapeutic agents have been used in the treatment of such disease. Tuatara at the Auckland Zoo are now routinely examined every 3 months and tissue samples from any lesions sent for histopathology and fungal culture. Further work to elucidate the epidemiology and significance of P. australasiensis infections in reptiles in New Zealand is important for both welfare and conservation purposes.

  4. The radio relics and halo of El Gordo, a massive z = 0.870 cluster merger

    Energy Technology Data Exchange (ETDEWEB)

    Lindner, Robert R.; Baker, Andrew J.; Hughes, John P. [Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019 (United States); Battaglia, Nick [McWilliams Center for Cosmology, Wean Hall, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213 (United States); Gupta, Neeraj [ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA Dwingeloo (Netherlands); Knowles, Kenda; Moodley, Kavilan [Astrophysics and Cosmology Research Unit, University of KwaZulu-Natal, Durban 4041 (South Africa); Marriage, Tobias A. [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686 (United States); Menanteau, Felipe [National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, 1205 W. Clark St., Urbana, IL 61801 (United States); Reese, Erik D. [Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd St., Philadelphia, PA 19104 (United States); Srianand, Raghunathan, E-mail: rlindner@astro.wisc.edu [IUCAA, Ganeshkhind, Pune 411007 (India)

    2014-05-01

    We present 610 MHz and 2.1 GHz imaging of the massive Sunyaev-Zel'dovich Effect selected z = 0.870 cluster merger ACT-CL J0102–4915 ({sup E}l Gordo{sup )}, obtained with the Giant Metrewave Radio Telescope and the Australia Telescope Compact Array (ATCA), respectively. We detect two complexes of radio relics separated by 3.'4 (1.6 Mpc) along the system's northwest-to-southeast collision axis that have high integrated polarization fractions (33%) and steep spectral indices (α between 1 and 2; S {sub ν}∝ν{sup –α}), consistent with creation via Fermi acceleration by shocks in the intracluster medium triggered by the cluster collision. From the spectral index of the relics, we compute a Mach number M=2.5{sub −0.3}{sup +0.7} and shock speed of 2500{sub −300}{sup +400} km s{sup −1}. With our wide-bandwidth, full-polarization ATCA data, we compute the Faraday depth φ across the northwest relic and find a range of values spanning Δφ = 30 rad m{sup –2}, with a mean value of (φ) = 11 rad m{sup –2} and standard deviation σ{sub φ} = 6 rad m{sup –2}. With the integrated line-of-sight gas density derived from new Chandra X-ray observations, our Faraday depth measurement implies B {sub ∥} ∼ 0.01 μG in the cluster outskirts. The extremely narrow shock widths in the relics (d {sub shock} ≤ 23 kpc), caused by the short synchrotron cooling timescale of relativistic electrons at z = 0.870, prevent us from placing a meaningful constraint on the magnetic field strength B using cooling time arguments. In addition to the relics, we detect a large (r {sub H} ≅ 1.1 Mpc radius), powerful (log (L {sub 1.4}/W Hz{sup –1}) = 25.66 ± 0.12) radio halo with a shape similar to El Gordo's 'bullet'-like X-ray morphology. The spatially resolved spectral-index map of the halo shows the synchrotron spectrum is flattest near the relics, along the system's collision axis, and in regions of high T {sub gas}, all locations associated

  5. Size-Related Differences in the Thermoregulatory Habits of Free-Ranging Komodo Dragons

    Directory of Open Access Journals (Sweden)

    Henry J. Harlow

    2010-01-01

    Full Text Available Thermoregulatory processes were compared among three-size groups of free-ranging Komodo dragons (Varanus komodoensis comprising small (5–20 kg, medium (20–40 gm and large (40–70 kg lizards. While all size groups maintained a similar preferred body temperature of ≈35∘C, they achieved this end point differently. Small dragons appeared to engage in sun shuttling behavior more vigorously than large dragons as represented by their greater frequency of daily ambient temperature and light intensity changes as well as a greater activity and overall exposure to the sun. Large dragons were more sedentary and sun shuttled less. Further, they appear to rely to a greater extent on microhabitat selection and employed mouth gaping evaporative cooling to maintain their preferred operational temperature and prevent overheating. A potential ecological consequence of size-specific thermoregulatory habits for dragons is separation of foraging areas. In part, differences in thermoregulation could contribute to inducing shifts in predatory strategies from active foraging in small dragons to more sedentary sit-and-wait ambush predators in adults.

  6. Nannizziopsis guarroi infection in 2 Inland Bearded Dragons (Pogona vitticeps): clinical, cytologic, histologic, and ultrastructural aspects.

    Science.gov (United States)

    Le Donne, Viviana; Crossland, Nicholas; Brandão, João; Sokolova, Yuliya; Fowlkes, Natalie; Nevarez, Javier G; Langohr, Ingeborg M; Gaunt, Stephen D

    2016-06-01

    Chrysosporium-related infections have been increasingly reported in reptiles over the last 2 decades. In this report, we describe clinical, cytologic, histopathologic, and ultrastructural aspects of Chrysosporium-related infection in 2 Inland Bearded Dragons (Pogona vitticeps). Case 1 was presented for an enlarging raised lesion over the left eye and multiple additional masses over the dorsum. Case 2 was submitted to necropsy by the referring veterinarian for suspected yellow fungus disease. Impression smears of the nodules in case 1 revealed granulomatous to pyogranulomatous inflammation and many septate, variably long, 4-10 μm wide, often undulated hyphae, and very rare conidia. Postmortem impression smears of the superficial lesions of case 2 contained large numbers of solitary conidia and arthroconidia and low numbers of hyphae with similar morphology to case 1. Histopathology of the 2 cases revealed severe, multifocal, chronic, ulcerative, nodular pyogranulomatous dermatitis, with myriad intralesional septate hyphae, and arthroconidia. Fungal culture and molecular sequencing in both cases indicated infection with Nannizziopsis guarroi. © 2016 American Society for Veterinary Clinical Pathology.

  7. The Brief Analysis of the Dragon Boat Festival in Datong Area---A Case Study of Hunyuan County%大同地区的端午节习俗--以浑源县为例

    Institute of Scientific and Technical Information of China (English)

    王志芳

    2016-01-01

    As one of the traditional Chinese Dragon Boat Festival, which itself is very rich in cultural connotation, and in Hunyuan of Datong which used to be the border of Hu and Han people, the Dragon Boat Festival has unique geographical characteristics. Therefore, I choose Hunyuan as a research object, andyzed in detail in terms of the local origins of the Dragon Boat Festival customs, rituals, influence, so as to reveal the overall features of changes, and the significant impact on the local cultural heritage and economic development.%端午节作为中国传统节日之一,其本身的文化内涵就非常丰富,而处于胡汉交界地区的大同浑源县,其端午习俗更富有独特的地域特色。因此,笔者选择浑源县作为研究端午节俗的突破对象,从当地端午习俗的源流、仪式、影响等方面具体分析,以点见面,揭示大同地区端午节俗的整体变迁特点,及其对当地文化传承和经济发展的重大影响。

  8. Myelogenous leukemia in a bearded dragon (Acanthodraco vitticeps).

    Science.gov (United States)

    Tocidlowski, M E; McNamara, P L; Wojcieszyn, J W

    2001-03-01

    A 3-yr-old bearded dragon (Acanthodraco vitticeps) presented with lethargy, a swollen right elbow joint, inability to move its rear limbs normally, and marked leukocytosis. The majority of leukocytes were an abnormal mononuclear lymphoid-type cell with a high nuclear to cytoplasmic ratio, a slightly blue cytoplasm, nuclei with coarsely granular chromatin, and some nuclear clefts. Acute leukemia of lymphoid or myeloid origin was tentatively diagnosed. The abnormal mononuclear leukocyte cell population stained positively for the myeloid cytochemical stains: peroxidase, chloroacetate esterase, and L1-calprotectin. The abnormal cell population of the peripheral blood did not stain with the lymphoid cytochemical stains: alpha-naphthyl butyrate esterase, CD3, and CD79a.

  9. Simulation of Reactors for Antineutrino Experiments Using DRAGON

    CERN Document Server

    Winslow, L

    2011-01-01

    From the discovery of the neutrino to the precision neutrino oscillation measurements in KamLAND, nuclear reactors have proven to be an important source of antineutrinos. As their power and our knowledge of neutrino physics has increased, more sensitive measurements have become possible. The next generation of reactor antineutrino experiments require more detailed simulations of the reactor core. Many of the reactor simulation codes are proprietary which makes detailed studies difficult. Here we present the results of the open source DRAGON code and compare it to other industry standards for reactor modeling. We use published data from the Takahama reactor to determine the quality of the simulations. The propagation of the uncertainty to the antineutrino flux is also discussed.

  10. Cytotoxic and antibacterial flavonoids from dragon's blood of Dracaena cambodiana.

    Science.gov (United States)

    Luo, Ying; Wang, Hui; Zhao, You-Xing; Zeng, Yan-Bo; Shen, Hai-Yan; Dai, Hao-Fu; Mei, Wen-Li

    2011-12-01

    Chemical studies on the constituents from the dragon's blood of Dracaena cambodiana led to the discovery of three new flavonoid derivatives (1- 3) and six known compounds (4- 9). The structures of the three new compounds were elucidated by NMR and MS spectroscopic analyses. All compounds were evaluated for their growth inhibitory activity against human cell lines K-562, SMMC-7721, and SGC-7901, as well as antibacterial activities against Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA). As a result, compounds 1, 2, 5, 7, and 9 showed cytotoxicity against K-562, SMMC-7721, and SGC-7901 cell lines. All these compounds were observed to exhibit antibacterial activities against S. aureus, and compounds 1- 4, 6, 8, and 9 were observed to exhibit antibacterial activity against MRSA. © Georg Thieme Verlag KG Stuttgart · New York.

  11. [Antibacterial components from artificially induced dragon's blood of Dracaena cambodiana].

    Science.gov (United States)

    Jiang, He-mei; Wang, Hui; Wang, Jun; Dai, Hao-fu; Luo, Yan-ping; Mei, Wen-li

    2015-10-01

    Ten compounds were isolated from the artificially induced dragon's blood of Dracaena cambodiana by various column chromatographies on silica and sephadex LH-20 gel. Based on spectral analysis of NMR and MS, their structures were identified as 3, 4-dihydroxyallylbenzene (1), 3', 4', 5'-trimethoxycinnamylalcohol (2), pinoresinol (3), (2R)-7, 4'-dihydroxy-8-methylflavane (4), (2R)-7,4'-dihydroxy-5-methoxy-8-methylflavane(5),(2S)-7,3'-dihydroxy-4'-methoxy-8-methylflavane(6) ,(2S)-4',7-dihydroxy-6, 8-dimethylflavane(7), 4,2',4'-trihydroxychalcone(8), 4,4'-dihydroxy-2-methoxydihydrochalcon(9) and Cambodianin E (10). Antibacterial activity assay showed that compounds 1, 4 and 10 have inhibitory effect on Fusarium oxysporum f. sp. cuben, Fusarium oxysporum f. sp. niveum, Fusarium oxysporum f. sp. vasinfectum and Ralstonia solanacearum.

  12. Slow waves, sharp waves, ripples, and REM in sleeping dragons.

    Science.gov (United States)

    Shein-Idelson, Mark; Ondracek, Janie M; Liaw, Hua-Peng; Reiter, Sam; Laurent, Gilles

    2016-04-29

    Sleep has been described in animals ranging from worms to humans. Yet the electrophysiological characteristics of brain sleep, such as slow-wave (SW) and rapid eye movement (REM) activities, are thought to be restricted to mammals and birds. Recording from the brain of a lizard, the Australian dragon Pogona vitticeps, we identified SW and REM sleep patterns, thus pushing back the probable evolution of these dynamics at least to the emergence of amniotes. The SW and REM sleep patterns that we observed in lizards oscillated continuously for 6 to 10 hours with a period of ~80 seconds. The networks controlling SW-REM antagonism in amniotes may thus originate from a common, ancient oscillator circuit. Lizard SW dynamics closely resemble those observed in rodent hippocampal CA1, yet they originate from a brain area, the dorsal ventricular ridge, that has no obvious hodological similarity with the mammalian hippocampus.

  13. Hydraulic model tests on modified Wave Dragon. Phase 3

    Energy Technology Data Exchange (ETDEWEB)

    Hald, T.; Lynggaard, J.

    2002-11-01

    The purpose of this report is to describe the model tests conducted with a new designed 2. generation WD model as well as obtained model test results. Tests are conducted as sequential reconstruction followed by physical model tests. All details concerning the reconstruction are found in Hald and Lynggaard (2001). Model tests and reconstruction are carried out during the phase 3 project: 'Wave Dragon. Reconstruction of an existing model in scale 1:50 and sequential tests of changes to the model geometry and mass distribution parameters' sponsored by the Danish Energy Agency (DEA) wave energy programme. The tests will establish a well documented basis for the development of a 1:4.5 scale prototype planned for testing Nissum Bredning, a sea inlet on the Danish West Coast. (au)

  14. The Wave Dragon: tests on a modified model

    Energy Technology Data Exchange (ETDEWEB)

    Martinelli, Luca; Frigaard, Peter

    1999-09-01

    A modified floating model of the Wave Dragon was tested for movements, overtopping and forces on critical positions. The modifications and consequent testing of the model are part of a R and D programme. 18 tests (repetitions included) were carried out during May 1999. Forces in 7 different positions and movements for three degrees of freedom (heave, pitch and surge) were recorded for 7 wave situations. Total overtopping was measured for 5 different wave situations. Furthermore influence of crest freeboard was tested. Sensitivity to the energy spreading in multidirectional seas was investigated. A typical exponential equation describing overtopping was fitted to the data in case of frequent wave conditions. The formula is compared to the present tests. (au)

  15. Temperature coefficients in the Dragon low-enriched power reactor

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, U.

    1972-05-15

    The temperature coefficient of the fuel and of the moderator have been evaluated for the Dragon HTR design for different stages in reactor life, initial core, end of no-refuelling period and equilibrium conditions. The investigation has shown the low-enriched HTR to have a strong, positive moderator coefficient. In some cases and for special operating conditions, even leading to a positive total temperature coefficient. This does not imply, however, that the HTR is an unsafe reactor system. By adequate design of the control system, safe and reliable operating characteristics can be achieved. This has already been proved satisfactory through many years of operation of other graphite moderated systems, such as the Magnox stations.

  16. Dragon exploratory system on Hepatitis C Virus (DESHCV)

    KAUST Repository

    Kwofie, Samuel K.

    2011-06-01

    Even though Hepatitis C Virus (HCV) cDNA was characterized about 20 years ago, there is insufficient understanding of the molecular etiology underlying HCV infections. Current global rates of infection and its increasingly chronic character are causes of concern for health policy experts. Vast amount of data accumulated from biochemical, genomic, proteomic, and other biological analyses allows for novel insights into the HCV viral structure, life cycle and functions of its proteins. Biomedical text-mining is a useful approach for analyzing the increasing corpus of published scientific literature on HCV. We report here the first comprehensive HCV customized biomedical text-mining based online web resource, dragon exploratory system on Hepatitis C Virus (DESHCV), a biomedical text-mining and relationship exploring knowledgebase was developed by exploring literature on HCV. The pre-compiled dictionaries existing in the dragon exploratory system (DES) were enriched with biomedical concepts pertaining to HCV proteins, their name variants and symbols to make it suitable for targeted information exploration and knowledge extraction as focused on HCV. A list of 32,895 abstracts retrieved via PubMed database using specific keywords searches related to HCV were processed based on concept recognition of terms from several dictionaries. The web query interface enables retrieval of information using specified concepts, keywords and phrases, generating text-derived association networks and hypotheses, which could be tested to identify potentially novel relationship between different concepts. Such an approach could also augment efforts in the search for diagnostic or even therapeutic targets. DESHCV thus represents online literature-based discovery resource freely accessible for academic and non-profit users via http://apps.sanbi.ac.za/DESHCV/ and its mirror site http://cbrc.kaust.edu.sa/deshcv/. © 2010 Elsevier B.V.

  17. Dragon exploratory system on hepatitis C virus (DESHCV).

    Science.gov (United States)

    Kwofie, Samuel K; Radovanovic, Aleksandar; Sundararajan, Vijayaraghava S; Maqungo, Monique; Christoffels, Alan; Bajic, Vladimir B

    2011-06-01

    Even though hepatitis C virus (HCV) cDNA was characterized about 20 years ago, there is insufficient understanding of the molecular etiology underlying HCV infections. Current global rates of infection and its increasingly chronic character are causes of concern for health policy experts. Vast amount of data accumulated from biochemical, genomic, proteomic, and other biological analyses allows for novel insights into the HCV viral structure, life cycle and functions of its proteins. Biomedical text-mining is a useful approach for analyzing the increasing corpus of published scientific literature on HCV. We report here the first comprehensive HCV customized biomedical text-mining based online web resource, dragon exploratory system on hepatitis C virus (DESHCV), a biomedical text-mining and relationship exploring knowledge base was developed by exploring literature on HCV. The pre-compiled dictionaries existing in the dragon exploratory system (DES) were enriched with biomedical concepts pertaining to HCV proteins, their name variants and symbols to make it suitable for targeted information exploration and knowledge extraction as focused on HCV. A list of 32,895 abstracts retrieved via PubMed database using specific keywords searches related to HCV were processed based on concept recognition of terms from several dictionaries. The web query interface enables retrieval of information using specified concepts, keywords and phrases, generating text-derived association networks and hypotheses, which could be tested to identify potentially novel relationship between different concepts. Such an approach could also augment efforts in the search for diagnostic or even therapeutic targets. DESHCV thus represents online literature-based discovery resource freely accessible for academic and non-profit users via http://apps.sanbi.ac.za/DESHCV/ and its mirror site http://cbrc.kaust.edu.sa/deshcv/.

  18. Can camera traps monitor Komodo dragons a large ectothermic predator?

    Directory of Open Access Journals (Sweden)

    Achmad Ariefiandy

    Full Text Available Camera trapping has greatly enhanced population monitoring of often cryptic and low abundance apex carnivores. Effectiveness of passive infrared camera trapping, and ultimately population monitoring, relies on temperature mediated differences between the animal and its ambient environment to ensure good camera detection. In ectothermic predators such as large varanid lizards, this criterion is presumed less certain. Here we evaluated the effectiveness of camera trapping to potentially monitor the population status of the Komodo dragon (Varanus komodoensis, an apex predator, using site occupancy approaches. We compared site-specific estimates of site occupancy and detection derived using camera traps and cage traps at 181 trapping locations established across six sites on four islands within Komodo National Park, Eastern Indonesia. Detection and site occupancy at each site were estimated using eight competing models that considered site-specific variation in occupancy (ψand varied detection probabilities (p according to detection method, site and survey number using a single season site occupancy modelling approach. The most parsimonious model [ψ (site, p (site survey; ω = 0.74] suggested that site occupancy estimates differed among sites. Detection probability varied as an interaction between site and survey number. Our results indicate that overall camera traps produced similar estimates of detection and site occupancy to cage traps, irrespective of being paired, or unpaired, with cage traps. Whilst one site showed some evidence detection was affected by trapping method detection was too low to produce an accurate occupancy estimate. Overall, as camera trapping is logistically more feasible it may provide, with further validation, an alternative method for evaluating long-term site occupancy patterns in Komodo dragons, and potentially other large reptiles, aiding conservation of this species.

  19. Can camera traps monitor Komodo dragons a large ectothermic predator?

    Science.gov (United States)

    Ariefiandy, Achmad; Purwandana, Deni; Seno, Aganto; Ciofi, Claudio; Jessop, Tim S

    2013-01-01

    Camera trapping has greatly enhanced population monitoring of often cryptic and low abundance apex carnivores. Effectiveness of passive infrared camera trapping, and ultimately population monitoring, relies on temperature mediated differences between the animal and its ambient environment to ensure good camera detection. In ectothermic predators such as large varanid lizards, this criterion is presumed less certain. Here we evaluated the effectiveness of camera trapping to potentially monitor the population status of the Komodo dragon (Varanus komodoensis), an apex predator, using site occupancy approaches. We compared site-specific estimates of site occupancy and detection derived using camera traps and cage traps at 181 trapping locations established across six sites on four islands within Komodo National Park, Eastern Indonesia. Detection and site occupancy at each site were estimated using eight competing models that considered site-specific variation in occupancy (ψ)and varied detection probabilities (p) according to detection method, site and survey number using a single season site occupancy modelling approach. The most parsimonious model [ψ (site), p (site survey); ω = 0.74] suggested that site occupancy estimates differed among sites. Detection probability varied as an interaction between site and survey number. Our results indicate that overall camera traps produced similar estimates of detection and site occupancy to cage traps, irrespective of being paired, or unpaired, with cage traps. Whilst one site showed some evidence detection was affected by trapping method detection was too low to produce an accurate occupancy estimate. Overall, as camera trapping is logistically more feasible it may provide, with further validation, an alternative method for evaluating long-term site occupancy patterns in Komodo dragons, and potentially other large reptiles, aiding conservation of this species.

  20. English Water Meadows: historic relics or focus for environmental management and inter-disciplinary research?

    Science.gov (United States)

    Cook, Hadrian

    2015-04-01

    Irrigated water meadows are found across Europe, from southern Scandinavia to Spain and in the Alpine regions and Italy. While the practice of engineering 'floated' meadow land for deliberate irrigation on hillsides and floodplains is widespread and ancient, since about 1600 AD the practice was widely adopted on floodplains in southern England where they improved the timing and productivity of grazing land and produced hay crops. They also became a part of English consciousness through art and literature. To some, water meadows are a relic of an agrarian past, to others they are the object of a range of foci for conservation, education, sustainable grass production, community engagement and recent research suggests water returned from meadow irrigation is beneficial to river water quality. Historically floodplain 'bedwork' water meadows grew from, and were integral in, the farming system of 'Wessex' involving sheep which produced dung for arable land and later supporting dairy and beef production, as well as hay. Where systems remain, this is largely due to the whim of individuals, the outcome of agri-environmental schemes. Water meadows may be managed by public, voluntary or private sector bodies. What is needed is a fresh look at how land owners, or communities, might micro-target them for heritage, habitat and grassland management. There are therefore interesting questions concerning their future: Who might invest in their restoration and maintenance? How might they be integrated into commercial farming? Are they of sufficient interest to restore en masse to become (once more) a major feature of the English chalk stream valleys? Do they provide a way into academic and public perception, combining environmental science, history, cultural heritage and environmental management? How might restoration and management become vehicles for public engagement? While each of these questions represents a major topic for discussion, this paper is an attempt to consolidate

  1. cultural

    Directory of Open Access Journals (Sweden)

    Irene Kreutz

    2006-01-01

    Full Text Available Es un estudio cualitativo que adoptó como referencial teorico-motodológico la antropología y la etnografía. Presenta las experiencias vivenciadas por mujeres de una comunidad en el proceso salud-enfermedad, con el objetivo de comprender los determinantes sócio-culturales e históricos de las prácticas de prevención y tratamiento adoptados por el grupo cultural por medio de la entrevista semi-estructurada. Los temas que emergieron fueron: la relación entre la alimentación y lo proceso salud-enfermedad, las relaciones con el sistema de salud oficial y el proceso salud-enfermedad y lo sobrenatural. Los dados revelaron que los moradores de la comunidad investigada tienen un modo particular de explicar sus procedimientos terapéuticos. Consideramos que es papel de los profesionales de la salud en sus prácticas, la adopción de abordajes o enfoques que consideren al individuo en su dimensión sócio-cultural e histórica, considerando la enorme diversidad cultural en nuestro país.

  2. Radiative corrections for the direct detection of neutralino dark matter and its relic density

    Energy Technology Data Exchange (ETDEWEB)

    Steppeler, Patrick Norbert

    2016-07-01

    entering the Boltzmann equation in many scenarios of the MSSM. The Boltzmann equation allows to determine the neutralino relic density, i.e. to predict their present abundance. This prediction can be checked experimentally and is thus of great phenomenological relevance. Measurements of the temperature fluctuations of the cosmic microwave background permit to determine the relic density precisely. Comparing the theoretical prediction with the experimental finding allows to exclude large fractions of the MSSM parameter space. In order to maximally benefit from the experimental precision, it is necessary to minimise theoretical uncertainties and to include the aforementioned radiative corrections. The radiative corrections to the elastic neutralino-nucleon scattering and the corresponding relic density have been implemented into the numerical package Dark matter at next-to-leading order. With the help of this program, we perform a phenomenological investigation and analyse the impact of the radiative corrections. It turns out that the neutralino relic density depends not on a single but a multitude of gaugino (co)annihilation processes in parallel quite often. The calculated radiative corrections lead to a relative shift of the relic density of up to 10%, which is significantly larger than the experimental uncertainty (±2% at the 1σ confidence level) and demonstrates that these corrections should be included when identifying the cosmologically preferred region of the MSSM. Moreover, we investigate the relation between the relic density and the neutralino-nucleon cross sections. In the spin-independent case, the inclusion of radiative corrections leads to a relative shift roughly +14% in comparison to a tree-level calculation. This shift is comparable to typical recent nuclear uncertainties, which influence the prediction as well. The spin-dependent cross section is subject to even larger shifts and modified by up to -50% by radiative corrections.

  3. The impact of the SZ effect on cm-wavelength (1-30 GHz) observations of galaxy cluster radio relics

    Science.gov (United States)

    Basu, Kaustuv; Vazza, Franco; Erler, Jens; Sommer, Martin

    2016-07-01

    Radio relics in galaxy clusters are believed to be associated with powerful shock fronts that originate during cluster mergers, and are a testbed for the acceleration of relativistic particles in the intracluster medium. Recently, radio relic observations have pushed into the cm-wavelength domain (1-30 GHz) where a break from the standard synchrotron power law spectrum has been found, most noticeably in the famous "Sausage" relic. Such spectral steepening is seen as an evidence for non-standard relic models, such as ones requiring seed electron population with a break in their energy spectrum. In this paper, however, we point to an important effect that has been ignored or considered insignificant while interpreting these new high-frequency radio data, namely the contamination due to the Sunyaev-Zel'dovich (SZ) effect that changes the observed synchrotron flux. Even though the radio relics reside in the cluster outskirts, the shock-driven pressure boost increases the SZ signal locally by roughly an order of magnitude. The resulting flux contamination for some well-known relics are non-negligible already at 10 GHz, and at 30 GHz the observed synchrotron fluxes can be diminished by a factor of several from their true values. At higher redshift the contamination gets stronger due to the redshift independence of the SZ effect. Interferometric observations are not immune to this contamination, since the change in the SZ signal occurs roughly at the same length scale as the synchrotron emission, although there the flux loss is less severe than single-dish observations. Besides presenting this warning to observers, we suggest that the negative contribution from the SZ effect can be regarded as one of the best evidence for the physical association between radio relics and shock waves. We present a simple analytical approximation for the synchrotron-to-SZ flux ratio, based on a theoretical radio relic model that connects the nonthermal emission to the thermal gas properties

  4. NGC 1277: A MASSIVE COMPACT RELIC GALAXY IN THE NEARBY UNIVERSE

    Energy Technology Data Exchange (ETDEWEB)

    Trujillo, Ignacio; Vazdekis, Alexandre [Instituto de Astrofísica de Canarias, c/Vía Láctea s/n, E-38205-La Laguna, Tenerife (Spain); Ferré-Mateu, Anna [Subaru Telescope, 650 North A' ohoku Place, Hilo, HI 96720 (United States); Balcells, Marc [Isaac Newton Group of Telescopes, E-38700 Santa Cruz de La Palma, Canary Islands (Spain); Sánchez-Blázquez, Patricia, E-mail: trujillo@iac.es [Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049, Cantoblanco, Madrid (Spain)

    2014-01-10

    As early as 10 Gyr ago, galaxies with more than 10{sup 11} M {sub ☉} of stars already existed. While most of these massive galaxies must have subsequently transformed through on-going star formation and mergers with other galaxies, a small fraction (≲0.1%) may have survived untouched until today. Searches for such relic galaxies, useful windows to explore the early universe, have been inconclusive to date: galaxies with masses and sizes like those observed at high redshift (M {sub *} ≳ 10{sup 11} M {sub ☉}; R{sub e} ≲ 1.5 kpc) have been found in the local universe, but their stars are far too young for the galaxy to be a relic galaxy. This paper explores the first case of a nearby galaxy, NGC 1277 (at a distance of 73 Mpc in the Perseus galaxy cluster), which fulfills many criteria to be considered a relic galaxy. Using deep optical spectroscopy, we derive the star formation history along the structure of the galaxy: the stellar populations are uniformly old (>10 Gyr) with no evidence for more recent star formation episodes. The metallicity of their stars is super-solar ([Fe/H] = 0.20 ± 0.04 with a smooth decline toward the outer regions) and α-enriched ([α/Fe] = 0.4 ± 0.1). This suggests a very short formation time scale for the bulk of the stars in this galaxy. This object also rotates very fast (V {sub rot} ∼ 300 km s{sup –1}) and has a large central velocity dispersion (σ > 300 km s{sup –1}). NGC 1277 allows the exploration in full detail of properties such as the structure, internal dynamics, metallicity, and initial mass function as they were at ∼10-12 Gyr ago when the first massive galaxies were built.

  5. Dragon (repulsive guidance molecule RGMb) inhibits E-cadherin expression and induces apoptosis in renal tubular epithelial cells.

    Science.gov (United States)

    Liu, Wenjing; Li, Xiaoling; Zhao, Yueshui; Meng, Xiao-Ming; Wan, Chao; Yang, Baoxue; Lan, Hui-Yao; Lin, Herbert Y; Xia, Yin

    2013-11-01

    Dragon is one of the three members of the repulsive guidance molecule (RGM) family, i.e. RGMa, RGMb (Dragon), and RGMc (hemojuvelin). We previously identified the RGM members as bone morphogenetic protein (BMP) co-receptors that enhance BMP signaling. Our previous studies found that Dragon is highly expressed in the tubular epithelial cells of mouse kidneys. However, the roles of Dragon in renal epithelial cells are yet to be defined. We now show that overexpression of Dragon increased cell death induced by hypoxia in association with increased cleaved poly(ADP-ribose) polymerase and cleaved caspase-3 levels in mouse inner medullary collecting duct (IMCD3) cells. Dragon also inhibited E-cadherin expression but did not affect epithelial-to-mesenchymal transition induced by TGF-β in IMCD3 cells. Previous studies suggest that the three RGM members can function as ligands for the receptor neogenin. Interestingly, our present study demonstrates that the Dragon actions on apoptosis and E-cadherin expression in IMCD3 cells were mediated by the neogenin receptor but not through the BMP pathway. Dragon expression in the kidney was up-regulated by unilateral ureteral obstruction in mice. Compared with wild-type mice, heterozygous Dragon knock-out mice exhibited 45-66% reduction in Dragon mRNA expression, decreased epithelial apoptosis, and increased tubular E-cadherin expression and had attenuated tubular injury after unilateral ureteral obstruction. Our results suggest that Dragon may impair tubular epithelial integrity and induce epithelial apoptosis both in vitro and in vivo.

  6. The impact of SZ effect on cm-wavelength (1-30 GHz) observation of galaxy cluster radio relics

    CERN Document Server

    Basu, Kaustuv; Erler, Jens; Sommer, Martin

    2015-01-01

    (Abridged) Radio relics in galaxy clusters are believed to be associated with powerful shock fronts that originate during cluster mergers, and are a testbed for the acceleration of relativistic particles in the intracluster medium. Recently, radio relic observations have pushed into the cm-wavelength domain (1-30 GHz) where a break from the standard synchrotron power-law spectrum has been found, most noticeably in the famous 'Sausage' relic. In this paper, we point to an important effect that has been ignored or considered insignificant while interpreting these new high-frequency radio data, namely the contamination due to the Sunyaev-Zel'dovich (SZ) effect that changes the observed radio flux. Even though the radio relics reside in the cluster outskirts, the shock-driven pressure boost increases the SZ signal locally by roughly an order of magnitude. The resulting flux contamination for some well-known relics are non-negligible already at 10 GHz, and at 30 GHz the observed radio fluxes can be diminished by a...

  7. The highest-frequency detection of a radio relic: 16-GHz AMI observations of the `Sausage' cluster

    CERN Document Server

    Stroe, Andra; Harwood, Jeremy J; van Weeren, Reinout; Röttgering, Huub J A; Saunders, Richard D E; Sobral, David; Perrott, Yvette C; Schammel, Michel P

    2014-01-01

    We observed the cluster CIZA J2242.8+5301 with the Arcminute Microkelvin Imager at $16$ GHz and present the first high radio-frequency detection of diffuse, non-thermal cluster emission. This cluster hosts a variety of bright, extended, steep-spectrum synchrotron-emitting radio sources, associated with the intra-cluster medium, called radio relics. Most notably, the northern, Mpc-wide, narrow relic provides strong evidence for diffusive shock acceleration in clusters. We detect a puzzling, flat-spectrum, diffuse extension of the southern relic, which is not visible in the lower radio-frequency maps. The northern radio relic is unequivocally detected and measures an integrated flux of $1.2\\pm0.3$ mJy. While the low-frequency ($<2$ GHz) spectrum of the northern relic is well represented by a power-law, it clearly steepens towards $16$ GHz. This result is inconsistent with diffusive shock acceleration predictions of ageing plasma behind a uniform shock front. The steepening could be caused by an inhomogeneous...

  8. No Shock Across Part of a Radio Relic in the Merging Galaxy Cluster ZwCl 2341.1+0000?

    CERN Document Server

    Ogrean, G A; van Weeren, R J; Burgmeier, A; Simionescu, A

    2014-01-01

    The galaxy cluster ZwCl 2341.1+0000 is a merging system at z=0.27, which hosts two radio relics and a central, faint, filamentary radio structure. The two radio relics have unusually flat integrated spectral indices of -0.49 +/- 0.18 and -0.76 +/- 0.17, values that cannot be easily reconciled with the theory of standard diffusive shock acceleration of thermal particles at weak merger shocks. We present imaging results from XMM-Newton and Chandra observations of the cluster, aimed to detect and characterise density discontinuities in the ICM. As expected, we detect a density discontinuity near each of the radio relics. However, if these discontinuities are the shock fronts that fuelled the radio emission, then their Mach numbers are surprisingly low, both <=2. We studied the aperture of the density discontinuities, and found that while the NW discontinuity spans the whole length of the NW radio relic, the arc spanned by the SE discontinuity is shorter than the arc spanned by the SE relic. This startling res...

  9. 浅析中韩端午的别称与语源%On Nickname and Etymology of South Korean and Chinese Dragon Boat Festival

    Institute of Scientific and Technical Information of China (English)

    文瑜

    2014-01-01

    China and South Korea since ancient times because inextricably linked to the political, economic, and cultural as-pects, which in many ways the two countries share a common culture and customs. Dragon Boat Festival is one of them. This article will discuss the two countries during the Dragon Boat nickname and etymology has done a listed and analyzed. Korean learners can make them understand and recognize.%中国与韩国因为自古代起就在政治、经济、文化等方面有着千丝万缕的联系,由此两国在很多方面都有着共同的文化风俗。端午节就是其中之一。本文仅就两国在端午节的别称与语源方面做了一个罗列与分析。使得韩语学习者可以对其有所了解和认识。

  10. A simple non-invasive protocol to establish primary cell lines from tail and toe explants for cytogenetic studies in Australian dragon lizards (Squamata: Agamidae)

    Science.gov (United States)

    O’Meally, Denis; Quinn, Alexander E.; Sarre, Stephen D.; Georges, Arthur; Marshall Graves, Jennifer A.

    2009-01-01

    Primary cell lines were established from cultures of tail and toe clips of five species of Australian dragon lizards: Tympanocryptis pinguicolla, Tympanocryptis sp., Ctenophorus fordi, Amphibolurus norrisi and Pogona vitticeps. The start of exponential cell growth ranged from 1 to 5 weeks. Cultures from all specimens had fibroblastic morphology. Cell lines were propagated continuously up to ten passages, cryopreserved and recovered successfully. We found no reduction in cell viability after short term (<6 months) storage at −80 °C. Mitotic metaphase chromosomes were harvested from these cell lines and used in differential staining, banding and fluorescent in situ hybridisation. Cell lines maintained normal diploidy in all species. This study reports a simple non-invasive method for establishing primary cell lines from Australian dragon lizards without sacrifice. The method is likely to be applicable to a range of species. Such cell lines provide a virtually unlimited source of material for cytogenetic, evolutionary and genomic studies. PMID:19199067

  11. A neglected - but not negligible - carbon reservoir in the Italian forests: relic charcoal kiln soils.

    Science.gov (United States)

    Mastrolonardo, Giovanni; Francioso, Ornella; Carrari, Elisa; Brogi, Cristiana; Venturi, Martina; Certini, Giacomo

    2017-04-01

    Charcoal production in forests is one of the oldest human activities in Italy and the other European countries. Here, 3 thousand years ago civilizations were already used to convert wood into charcoal for energetic and metallurgic purposes. The technique for making charcoal remained substantially unchanged in time: wood piles covered with turf were built in appositely shaped emplacements, and then left to pyrolyse for days under controlled semi-anoxic conditions. This widespread activity lasted until a few decades ago, leaving as legacy a plethora of repeatedly used emplacements where soil shows a thick top layer very rich in charcoal. Despite the high frequency of relic charcoal kilns in the European forests, no studies aimed at accurately determining their C stock to assess their relevance as C sink in forest environment. In this work, we studied some relic charcoal kilns in a mixed oak forest at Marsiliana, Tuscany, central Italy, where charcoal production was enduring and massive at least since the Middle age. At Marsiliana, density of charcoal kiln sites was not uniform within the forest areas as it mostly depends on biomass availability. According to the aspect, northerly or southerly, we recognized two main forest areas where kiln sites density ranged between 2 and 3 sites per hectare. In general, the C content in the kiln soils was eight times the one in the surrounding soil, with just one third of the C in the form of pyrogenic C. Hence, natural organic carbon content was significantly higher in the kiln soils. Such a finding confirms that charcoal gives a substantial contribution to the C stock in the kilns but does not fully account for their particular richness in C. It has been thus hypothesized that charcoal is somehow able to stimulate the accumulation of native soil organic matter. At Marsiliana forest, relic charcoal kilns soils cover less than 0.5% of total surface. Nonetheless, their contribution to the total C stock in the top soil (30 cm

  12. The Role of Electroweak Corrections for the Dark Matter Relic Abundance

    Energy Technology Data Exchange (ETDEWEB)

    Ciafaloni, Paolo [Dipartimento di Fisica, Università di Lecce and INFN - Sezione di Lecce, Via per Arnesano, I-73100 Lecce (Italy); Comelli, Denis [INFN - Sezione di Ferrara, Via Saragat 3, I-44100 Ferrara (Italy); Simone, Andrea De [CERN, PH-TH Division, CH-1211, Genève 23 (Switzerland); Morgante, Enrico; Riotto, Antonio [Département de Physique Théorique and Centre for Astroparticle Physics (CAP), 24 quai E. Ansermet, CH-1211 Genève (Switzerland); Urbano, Alfredo, E-mail: paolo.ciafaloni@le.infn.it, E-mail: comelli@fe.infn.it, E-mail: andrea.desimone@sissa.it, E-mail: enrico.morgante@unige.ch, E-mail: antonio.riotto@unige.ch, E-mail: alfredo.urbano@sissa.it [SISSA, Via Bonomea 265, I-34136 Trieste (Italy)

    2013-10-01

    We analyze the validity of the theorems concerning the cancellation of the infrared and collinar divergences in the case of dark matter freeze-out in the early universe. In particular, we compute the electroweak logarithmic corrections of infrared origin to the annihilation cross section of a dark matter particle being the neutral component of a SU(2){sub L} multiplet. The inclusion of processes with final state W can modify significantly the cross sections computed with only virtual W exchange. Our results show that the inclusion of infrared logs is necessary for a precise computation of the dark matter relic abundance.

  13. The Role of Electroweak Corrections for the Dark Matter Relic Abundance

    CERN Document Server

    Ciafaloni, Paolo; De Simone, Andrea; Morgante, Enrico; Riotto, Antonio; Urbano, Alfredo

    2013-01-01

    We analyze the validity of the theorems concerning the cancellation of the infrared and collinar divergences in the case of dark matter freeze-out in the early universe. In particular, we compute the electroweak logarithmic corrections of infrared origin to the annihilation cross section of a dark matter particle being the neutral component of a SU(2)_L multiplet. The inclusion of processes with final state W can modify significantly the cross sections computed with only virtual W exchange. Our results show that the inclusion of infrared logs is necessary for a precise computation of the dark matter relic abundance.

  14. Internal bremsstrahlung signature of real scalar dark matter and consistency with thermal relic density.

    Science.gov (United States)

    Toma, Takashi

    2013-08-30

    A gamma-ray excess from the Galactic center consistent with line emission around 130 GeV was recently found in the Fermi-LAT data. Although the Fermi-LAT Collaboration has not confirmed its significance, such a signal would be a clear signature of dark matter annihilation. Until now, there have been many attempts to explain the excess by dark matter. However, these efforts tend to give too-small cross sections into photons if consistency with the correct thermal relic density of dark matter is required. In this Letter, we consider a simple Yukawa interaction that can be compatible with both aspects and show which parameters are favored.

  15. Low frequency follow up of radio halos and relics in the GMRT Radio Halo Cluster Survey

    CERN Document Server

    Venturi, Tiziana; Dallacasa, Daniele; Cassano, Rossella; Brunetti, Gianfranco; Macario, Giulia; Athreya, Ramana

    2012-01-01

    We performed GMRT low frequency observations of the radio halos, relics and new candidates belonging to the GMRT Radio Halo Cluster Sample first observed at 610 MHz. High sensitivity imaging was performed using the GMRT at 325 MHz and 240 MHz. The properties of the diffuse emission in each cluster were compared to our 610 MHz images and/or literature information available at other frequencies, in order to derive the integrated spectra over a wide frequency range.Beyond the classical radio halos, whose spectral index $\\alpha$ is in the range $\\sim1.2\\div1.3$ (S$\\propto\

  16. First report of three redlisted tree species from swampy relics of Goa State, India

    Directory of Open Access Journals (Sweden)

    A. Prabhugaonkar

    2014-02-01

    Full Text Available Myristica swamps, one of the relic ecosystems of Western Ghats, are considered home for many rare and endemic angiosperms. During an inventory of Myristica swamps in Goa State, two critically endangered species and one endangered species, viz. Semecarpus kathalekanensis Dasappa and M.H.Swaminath, Syzygium travancoricum Gamble and Myristica fatua Houtt. var. magnifica (Bedd. J. Sinclair respectively were recorded. Present report forms first record of these three tree species from the Goa State. This report extends their distribution into Northern Western Ghats from central Western Ghats.

  17. Dark matter relic density from observations of supersymmetry at the ILC

    Energy Technology Data Exchange (ETDEWEB)

    Lehtinen, Suvi-Leena; List, Jenny; Berggren, Mikael [DESY, Hamburg (Germany)

    2016-07-01

    If supersymmetric particles were discovered at the International Linear Collider (ILC), would we be able to prove that the dark matter candidate discovered is the only dark matter particle? This was investigated using a scenario with a mostly bino lightest supersymmetric particle and a coannihilating stau. In this scenario, the ILC could find the sleptons and lighter gauginos, while the LHC could discover and measure parts of the coloured spectrum. We will demonstrate which measurements and precisions are needed to determine whether the observed dark matter candidate is the sole constituent of the dark matter relic density. The required precisions will be compared to the predicted precisions at the ILC.

  18. Suzaku observations of the merging galaxy cluster Abell 2255: The northeast radio relic

    Science.gov (United States)

    Akamatsu, H.; Mizuno, M.; Ota, N.; Zhang, Y.-Y.; van Weeren, R. J.; Kawahara, H.; Fukazawa, Y.; Kaastra, J. S.; Kawaharada, M.; Nakazawa, K.; Ohashi, T.; Röttgering, H. J. A.; Takizawa, M.; Vink, J.; Zandanel, F.

    2017-04-01

    We present the results of deep 140 ks Suzaku X-ray observations of the north-east (NE) radio relic of the merging galaxy cluster Abell 2255. The temperature structure of Abell 2255 is measured out to 0.9 times the virial radius (1.9 Mpc) in the NE direction for the first time. The Suzaku temperature map of the central region suggests a complex temperature distribution, which agrees with previous work. Additionally, on a larger-scale, we confirm that the temperature drops from 6 keV around the cluster center to 3 keV at the outskirts, with two discontinuities at r 5' (450 kpc) and 12' (1100 kpc) from the cluster center. Their locations coincide with surface brightness discontinuities marginally detected in the XMM-Newton image, which indicates the presence of shock structures. From the temperature drop, we estimate the Mach numbers to be ℳinner 1.2 and, ℳouter 1.4. The first structure is most likely related to the large cluster core region ( 350-430 kpc), and its Mach number is consistent with the XMM-Newton observation (ℳ 1.24: Sakelliou & Ponman 2006, MNRAS, 367, 1409). Our detection of the second temperature jump, based on the Suzaku key project observation, shows the presence of a shock structure across the NE radio relic. This indicates a connection between the shock structure and the relativistic electrons that generate radio emission. Across the NE radio relic, however, we find a significantly lower temperature ratio (T1/T2 1.44 ± 0.16 corresponds to ℳX-ray 1.4) than the value expected from radio wavelengths, based on the standard diffusive shock acceleration mechanism (T1/T2> 3.2 or ℳRadio> 2.8). This may suggest that under some conditions, in particular the NE relic of A2255 case, the simple diffusive shock acceleration mechanism is unlikely to be valid, and therefore, more a sophisticated mechanism is required.

  19. Phase and Polarization State of High-Frequency Relic Gravitational Waves

    Institute of Scientific and Technical Information of China (English)

    LI Fang-Yu; YANG Nan

    2009-01-01

    The displaying condition of strength, phase and polarization states of high-frequency relic gravitational waves (BFRGWs) in electromagnetic (EM) detecting systems is studied. It is shown that the displaying condition depends not only on the sensitivity of EM detecting systems and the amplitudes of HFRGWs, but also on the phase, the polarization states of HFRGWs and their matching to the EM detecting systems. In order to display simultaneously the strength, phase and polarization states of the resonant "monochromatic component"of HFRGWs, an important necessary condition is the utilization of two or more different EM detectors.

  20. 民国高校学术群体与文物保护事业论析%Academic Community and Relic Protection in the Universities of the Republic of China

    Institute of Scientific and Technical Information of China (English)

    江琳

    2015-01-01

    民国时期是中国现代文物保护事业的形成时期。从20世纪20年代开始,一批从事文物调查、研究和考古活动的学术团体在高校内建立。它们不但开展了实地调查和田野考古工作,积极筹备建设高校博物馆,发起文物维权运动,还借助高校平台支持官方的文物保护工作,推动了民国时期文物事业的发展。%The Republic of China is the formative period of modern protection of cultural relics .Since the beginning of the 1920 s, some academic groups engaged in cultural surveys , research and archaeological activities , and were established in the university .They not only carried out field surveys and archaeological field work , actively preparing for the construction of university museums , launched heritage campaign ,but also with aid of university'platform support , promoted the government work cultural relic protection during the period of the Republic of China .

  1. Distilled Relic

    Institute of Scientific and Technical Information of China (English)

    FRANCISCO; LITTLE

    2006-01-01

    Anyone who has been in China for any length of time will no doubt have experienced the rituals of the banquet. Most notably the endless display of friendship and cordiality shown by caring hosts, whase sole focus it seems is getting as much alcohol down your throat as is humanly possible in the space of 60 minutes.

  2. Golden Dragon Keeps Good Reputation in Syria%金旅客车:坚守叙利亚

    Institute of Scientific and Technical Information of China (English)

    田琼芳

    2016-01-01

    Golden Dragon exported its ifrst group of buses to Syria in 2009, since when the company had won a good reputation among the local customers with high quality product and excellent service. Nowadays Golden Dragon has been widely recognized in this country.

  3. 78 FR 42733 - Safety Zone; Cleveland Dragon Boat Festival and Head of the Cuyahoga, Cuyahoga River, Cleveland, OH

    Science.gov (United States)

    2013-07-17

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Cleveland Dragon Boat Festival and Head of... during the Dragon Boat Festival and Head of the Cuyahoga boating events. The safety zone established by...: http://www.regulations.gov . (2) Fax: 202-493-2251. (3) Mail: Docket Management Facility (M-30), U.S...

  4. 遗址公园地形地貌要素的设计与营造研究%Design and Construction of Topographical Elements in Parks of Historic Relics

    Institute of Scientific and Technical Information of China (English)

    郭洁; 张颖

    2011-01-01

    The protection and utilization of great historic sites mainly includes 4 modes, specifically, building the whole site into a park of historic relics; combining the site with the scenic area into a tourist site; building the site into a forest park; combining the site protection and development with that of modern agriculture so as to build an agricultural park of historic and cultural relics. In this study, it was emphasized that landscape design of such parks should first be based on the protection of historic relics. Among all constructed parks of historic relics in China,Relics of Sweet Spring Palace, Tomb of the Military Marquis Zhuge Liang and Tomb of Huangdi were taken as examples to demonstrate how large-scale topographical elements form the spatial pattern of garden landscapes; ruins of the Old Summer Palace and Relics Park of Qujiang Pool were taken to show how moderate-scale topographical elements form the spatial division of garden landscapes; by giving examples of micro-relief slope utilization, micro-relief stone and water layout, utilization of original reliefs and micro-relief functions, this study illustrated how such micro-scale topographical elements form landscape nodes in gardens, specifically introduced the functions of micro-relief, such as dividing and controlling spaces, creating aesthetic value, improving micro-climate and so on. Moreover, cases of terrain utilization and creation in classical western gardens were given, and masterworks of some modern western garden designers were borrowed and analyzed to find valuable concepts for designing parks of historic relics in China.%大遗址保护与利用包括将整个遗址区建成遗址公园;将遗址区与风景区相结合建成旅游景区;将整个遗址区建设成森林公园;将遗址保护与发展现代农业相结合,建成遗址历史文化农业园区4种主要模式.笔者强调遗址公园景观设计要以遗址保护为前提和出发点,在这一前提下,以我国已建

  5. [The relic in the Panels of São Vicente de Fora].

    Science.gov (United States)

    Goyri-O'Neill, João; Camisão-Soares, Artur; Neves Marques, Cláudia

    2013-01-01

    The Panels of São Vicente de Fora, a polyptych dated from 1470 to 1480, are a work composed of 6 panels, authored by Nuno Gonçalves, a painter of King Afonso V. This work reveals one of the most remarkable collective portraits of European painting, making this polyptych an inexhaustible source of readings and interpretations, fueling a secular controversy. The present work aims analyzing precise an iconographic anatomical image repainted in the 6th panel, or the panel of the Relic. This consists of a central image within a structure shown by a red figure with special reverence. The investigation conducted and justification was based on direct observation and comparative analysis of iconographic data collected in the Museum of Antique Art. The bone pieces were selected at the Museum of Anatomy, Department of Anatomy, Faculty of Medical Sciences, New University of Lisbon, and the comparative analyses performed by two observers, with further analysis of the images obtained in the National Museum of Ancient Art using specific software. After watching these, it was concluded that this representation of a relic in the Panels of São Vicente is an iconic representation of an Occipital bone, fractured at its lower edge, being evident, almost complete, its vertical portion or scale.

  6. Microchemical Study of Pigments and Binders in Polychrome Relics from Maiji Mountain Grottoes in Northwestern China.

    Science.gov (United States)

    Liu, Luyao; Shen, Wei; Zhang, Bingjian; Ma, Qian

    2016-08-01

    In this study, an integrated analytical method was developed to investigate the composition of both the inorganic pigments and organic binders of polychrome relics in Maiji Mountain Grottoes in northwestern China. Cross-sections of each sample were prepared at the beginning of the study, and all experiments were carried out on these cross-sections. Polychromic structures were revealed by optical microscopy and scanning electron microscopy-backscattered electron imaging. Inorganic materials were determined by using SEM coupled with an energy dispersive spectrometer and μ-Raman spectrometer, whereas organic materials were identified by staining techniques and highly sensitive and specific immunofluorescence microscopy. Data showed that the red colors are attributed to one or two pigments of red ochre, cinnabar, and minium; the blue pigment is natural lazurite; the green pigment is ascribed to atacamite; the white color is attributed to potassium feldspar; and the black surface is formed by the discoloration of minium to plattnerite under the influence of environmental factors. Regarding organic binders used in painting and preparation layers, mammalian animal glue and chicken egg white were both found alone or in mixture. Finally, the conclusion is made that the Secco technique is employed in polychrome relics from Maiji Mountain Grottoes.

  7. Has inflation really solved the problems of flatness and absence of relics?

    Science.gov (United States)

    Lieu, Richard

    2013-10-01

    Among the three cosmological enigma solved by the theory of inflation, viz. (a) large-scale flatness, (b) absence of monopoles and strings and (c) structure formation, the first two are addressed from the viewpoint of the observed scales having originated from very small ones, on which the density fluctuations of the curvaton and relics are inevitably of the order of unity or larger. By analysing strictly classically (and in two different gauges to ensure consistency) the density evolution of the smoothest possible pre-inflationary component - thermal radiation - it is found that the O(1) statistical fluctuations on the thermal wavelength scale present formidable obstacles to the linear theory of amplitude growth by the end of inflation. Since this wavelength scale exited the horizon at an early stage of inflation, it severely limits the number of e-folds of perturbative inflation. With more e-folds than ≈60 there will be even larger fluctuations in the radiation density that ensures inflation keeps making `false starts'. The only `way out' is to invoke a super-homogeneous pre-inflationary fluid, at least on small scales, adding to the fine-tuning and preventing one from claiming that inflation simply `redshifts away' all the relic inhomogeneities; i.e. the theory actually provided no explanation of (a) or (b), merely a tautology.

  8. Radiative Neutrino Mass with $Z_3$ Dark matter: From Relic Density to LHC Signatures

    CERN Document Server

    Ding, Ran; Liao, Yi; Xie, Wan-Peng

    2016-01-01

    In this work we give a comprehensive analysis on the phenomenology of a specific $\\mathbb{Z}_3$ dark matter (DM) model in which neutrino mass is induced at two loops by interactions with a DM particle that can be a complex scalar or a Dirac fermion. Both the DM properties in relic density and direct detection and the LHC signatures are examined in great detail, and indirect detection for gamma-ray excess from the Galactic Center is also discussed briefly. On the DM side, both semi-annihilation and co-annihilation processes play a crucial role in alleviating the tension of parameter space between relic density and direct detection. On the collider side, new decay channels resulting from $\\mathbb{Z}_3$ particles lead to distinct signals at LHC. Currently the trilepton signal is expected to give the most stringent bound for both scalar and fermion DM candidates, and the signatures of fermion DM are very similar to those of electroweakinos in simplified supersymmetric models.

  9. A Chandra Observation of Abell 13: Investigating the Origin of the Radio Relic

    CERN Document Server

    Juett, Adrienne M; Clarke, Tracy E; Andernach, Heinz; Ehle, Matthias; Fujita, Yutaka; Kempner, Joshua C; Roy, Alan L; Rudnick, Lawrence; Slee, O Bruce

    2007-01-01

    We present results from the Chandra X-ray observation of Abell 13, a galaxy cluster that contains an unusual noncentral radio source, also known as a radio relic. This is the first pointed X-ray observation of Abell 13, providing a more sensitive study of the properties of the X-ray gas. The X-ray emission from Abell 13 is extended to the northwest of the X-ray peak and shows substructure indicative of a recent merger event. The cluster X-ray emission is centered on the bright galaxy H of Slee et al. 2001. We find no evidence for a cooling flow in the cluster. A knot of excess X-ray emission is coincident with the other bright elliptical galaxy F. This knot of emission has properties similar to the enhanced emission associated with the large galaxies in the Coma cluster. With these Chandra data we are able to compare the properties of the hot X-ray gas with those of the radio relic from VLA data, to study the interaction of the X-ray gas with the radio emitting electrons. Our results suggest that the radio re...

  10. Signal photon flux generated by high-frequency relic gravitational waves

    Science.gov (United States)

    Li, Xin; Wang, Sai; Wen, Hao

    2016-08-01

    The power spectrum of primordial tensor perturbations increases rapidly in the high frequency region if the spectral index n t > 0. It is shown that the amplitude of relic gravitational waves h t(5 × 109 Hz) varies from 10-36 to 10-25 while n t varies from -6.25 × 10-3 to 0.87. A high frequency gravitational wave detector proposed by F.-Y. Li detects gravitational waves through observing the perturbed photon flux that is generated by interaction between relic gravitational waves and electromagnetic field. It is shown that the perturbative photon flux (5 × 109 Hz) varies from 1.40 × 10-4 s-1 to 2.85 × 107 s-1 while n t varies from -6.25 × 10-3 to 0.87. Correspondingly, the ratio of the transverse perturbative photon flux to the background photon flux varies from 10-28 to 10-16. Supported by National Natural Science Foundation of China (11305181,11322545,11335012) and Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China (Y5KF181CJ1)

  11. Discriminating between thermal and nonthermal cosmic relic neutrinos through an annual modulation at PTOLEMY

    Science.gov (United States)

    Huang, Guo-yuan; Zhou, Shun

    2016-12-01

    If massive neutrinos are Dirac particles, the proposed PTOLEMY experiment will hopefully be able to discover the cosmic neutrino background via νe+3H →3He+e- with a capture rate of ΓD≈4 yr-1 . Recently, it has been pointed out that right-handed components of Dirac neutrinos could also be copiously produced in the early Universe and become an extra thermal or nonthermal ingredient of cosmic relic neutrinos, enhancing the capture rate to ΓD≈5.1 yr-1 or ΓD≈6.1 yr-1. In this work, we investigate the possibility to distinguish between thermal and nonthermal spectra of cosmic relic neutrinos by measuring the annual modulation of the capture rate. For neutrino masses of 0.1 eV, we find that the amplitude of annual modulation in the standard case is M ≈0.05 %, which will be increased to 0.1% and 0.15% in the presence of additional thermal and nonthermal right-handed neutrinos, respectively. The future detection of such a modulation will be helpful in understanding the Majorana or Dirac nature of massive neutrinos.

  12. Dark Matter Mass Constrained by the Relic Abundance, Direct Detections, and Colliders

    CERN Document Server

    Tsai, Ho-Chin

    2013-01-01

    We take into account a generic form of a Dirac fermionic dark matter (DM), which communicates with the Standard Model quarks via a scalar mediator, in a model-independent way. Four special interaction scenarios are investigated, where one is parity conserving and the other three are parity violating. Three of them result in the $v$ suppressed DM-nucleon cross sections, where $v \\sim 10^{-3} c$ is the velocity of the DM in the laboratory frame. We constrain the masses of the dark matter and mediator as well as the couplings from the thermal relic abundance, and the recent results of the XENON100 direct detection and collider experiments involving the two channels: (i) monojet plus large missing transverse energy, and (ii) dijet. The current monojet constraint is not stronger than that from the requirement of the correct relic density and the null result by the XENON100 direct detection. We find that the dijet resonance measurements can exclude a large portion of the parameter space $(m_\\chi, m_Y)$, where the c...

  13. Gamma-ray emission from galaxy cluster outskirts versus radio relics

    CERN Document Server

    Siemieniec--Oziȩbło, G

    2016-01-01

    Galaxy cluster peripheries provide important information on the nature of ICM/IGM linkage. In this paper we consider potential future observations in the gamma-ray domain at cluster edges involving the radio relic phenomenon. We focus on the spectral signature of gamma radiation that should be evident in the energy range of Fermi--LAT, i.e. $\\gtrsim 10^{-1}$ GeV and the CTA energy range $\\sim$ $ 10^{2}$ GeV. The spectral signature results from a comparable gamma-ray flux due to the IC and $ \\pi ^{0} $ decay on the edge of the cluster, and its spectral position is a function of the magnetic field and relative efficiency of the acceleration of protons and electrons. We aim to draw attention to the dependence of the gamma-ray structure on the magnetic field value. As an example, we carried out analyses of two types of non-thermal diffuse radio emission: the radio relic of A 2256 and the radio halo of Coma cluster. We suggest that in both cases the expected spatially correlated gamma-ray spectrum should have a ch...

  14. Radio Relics Tracing the Projected Mass Distribution in CIZA J2242.8+5301

    CERN Document Server

    Okabe, Nobuhiro; Kakuwa, Jun; Fujita, Yutaka; Zhang, Yu-Ying; Tanaka, Masayuki; Umetsu, Keiichi

    2015-01-01

    We present a weak-lensing analysis for the merging galaxy cluster, CIZA J2242.8+5301, hosting double radio relics, using three-band Subaru/Suprime-Cam imaging ($Br'z'$). Since the lifetime of dark matter halos colliding into clusters is longer than that of X-ray emitting gas halos, weak-lensing analysis is a powerful method to constrain a merger dynamics. Two-dimensional shear fitting using a clean background catalog suggests that the cluster undergoes a merger with a mass ratio of about 2:1. The main halo is located around the gas core in the southern region, while no concentrated gas core is associated with the northern sub halo. We find that the projected cluster mass distribution resulting from an unequal-mass merger is in excellent agreement with the curved shapes of the two radio relics and the overall X-ray morphology except for the lack of the northern gas core. The lack of a prominent radio halo enables us to constrain an upper limit of the fractional energy of magneto-hydrodynamics turbulence of $(\\...

  15. Numerical Modeling of Exploitation Relics and Faults Influence on Rock Mass Deformations

    Science.gov (United States)

    Wesołowski, Marek

    2016-12-01

    This article presents numerical modeling results of fault planes and exploitation relics influenced by the size and distribution of rock mass and surface area deformations. Numerical calculations were performed using the finite difference program FLAC. To assess the changes taking place in a rock mass, an anisotropic elasto-plastic ubiquitous joint model was used, into which the Coulomb-Mohr strength (plasticity) condition was implemented. The article takes as an example the actual exploitation of the longwall 225 area in the seam 502wg of the "Pokój" coal mine. Computer simulations have shown that it is possible to determine the influence of fault planes and exploitation relics on the size and distribution of rock mass and its surface deformation. The main factor causing additional deformations of the area surface are the abandoned workings in the seam 502wd. These abandoned workings are the activation factor that caused additional subsidences and also, due to the significant dip, they are a layer on which the rock mass slides down in the direction of the extracted space. These factors are not taken into account by the geometrical and integral theories.

  16. Radio relics tracing the projected mass distribution in CIZA J2242.8+5301*

    Science.gov (United States)

    Okabe, Nobuhiro; Akamatsu, Hiroki; Kakuwa, Jun; Fujita, Yutaka; Zhang, Yuying; Tanaka, Masayuki; Umetsu, Keiichi

    2015-12-01

    We present a weak-lensing analysis for a merging galaxy cluster, CIZA J2242.8+5301, which hosts double radio relics, using three-band Subaru/Suprime-Cam imaging (Br'z'). Since the lifetime of dark matter halos colliding into clusters is longer than that of X-ray emitting gas halos, weak-lensing analysis is a powerful method to constrain merger dynamics. Two-dimensional shear fitting using a clean background catalog suggests that the cluster undergoes a merger with a mass ratio of about 2 : 1. The main halo is located around the gas core in the southern region, while no concentrated gas core is associated with the northern sub-halo. We find that the projected cluster mass distribution resulting from an unequal-mass merger is in excellent agreement with the curved shapes of the two radio relics and the overall X-ray morphology, except for the lack of the northern gas core. The lack of a prominent radio halo enables us to constrain an upper limit of the fractional energy of magnetohydrodynamic turbulence of (δ B/B)^2balance between the acceleration time and the time after the core passage or the cooling time, with an assumption of resonant acceleration by a second-order Fermi process.

  17. Relic density of wino-like dark matter in the MSSM

    CERN Document Server

    Beneke, M; Dighera, F; Hellmann, C; Hryczuk, A; Recksiegel, S; Ruiz-Femenia, P

    2016-01-01

    The relic density of TeV-scale wino-like neutralino dark matter in the MSSM is subject to potentially large corrections as a result of the Sommerfeld effect. A recently developed framework enables us to calculate the Sommerfeld-enhanced relic density in general MSSM scenarios, properly treating mixed states and multiple co-annihilating channels as well as including off-diagonal contributions. Using this framework, including on-shell one-loop mass splittings and running couplings and taking into account the latest experimental constraints, we perform a thorough study of the regions of parameter space surrounding the well known pure-wino scenario: namely the effect of sfermion masses being non-decoupled and of allowing non-negligible Higgsino or bino components in the lightest neutralino. We further perform an investigation into the effect of thermal corrections and show that these can safely be neglected. The results reveal a number of phenomenologically interesting but so far unexplored regions where the Somm...

  18. The scaling relations and the fundamental plane for radio halos and relics of galaxy clusters

    CERN Document Server

    Yuan, Z S; Wen, Z L

    2015-01-01

    Diffuse radio emission in galaxy clusters is known to be related to cluster mass and cluster dynamical state. We collect the observed fluxes of radio halos, relics and mini-halos for a sample of galaxy clusters from literature, and calculate their radio powers. We then obtain the values of cluster mass or mass proxies from previous observations, and also obtain the various dynamical parameters of these galaxy clusters from optical and X-ray data. The radio power of relics, halos and mini-halos are correlated with the cluster masses or mass proxies, as found by previous authors, with the correlations concerning giant radio halos being, in general, the strongest ones. We found that the inclusion of dynamical parameters as the third dimension can significantly reduce the data scatter for the scaling relations, especially for radio halos. We therefore conclude that the substructures in X-ray images of galaxy clusters and the irregular distributions of optical brightness of member galaxies can be used to quantitat...

  19. On the Origin of the Dragon Image on the Plate from Shilovka Burial Mound

    Directory of Open Access Journals (Sweden)

    Liphanov Nicolay А.

    2017-07-01

    Full Text Available The author of the article analyzes an unique image of two opposed dragons engraved on a bone plate discovered in 1992 at barrow No.1 of Shilovka burial mound located on the right bank of the Volga river in Ulyanovsk Oblast (the excavations were conducted by R.S. Bagautdinov. The burial mound is related to the cattle breeding population of late 7th century. The article considers different hypotheses concerning the origin of these dragon images in the artistic traditions of various regions: China (A.V. Komar, D.G. Savinov, B. Totev, Pelevina, Central Asia (V.G. Kotov, V.E. Flyorova, India (N.A. Fonyakova. According to the author, this image has no apparent iconographic parallels in the traditions of these regions. Such analogues are found in the art of the Mediterranean where the ancient images of various mythological creatures exist alongside the image of the sea dragon “ketos” which later became part of the Christian tradition. The appearance of this monster in the images of the first half – middle of the 1st millennium A.D. is practically identical to the dragons from Shilovka burial mound. According to the author, certain impact on the formation of the considered dragon image was made by Iranian art.

  20. Identification and differentiation of dragon's blood in works of art using gas chromatography/mass spectrometry.

    Science.gov (United States)

    Baumer, Ursula; Dietemann, Patrick

    2010-06-01

    Dragon's blood is a common but non-specific name for red-coloured resins that are produced by various plants, particularly exudations from plant species belonging to the genera Dracaena and Daemonorops. Although dragon's blood is mentioned in historic sources as a colourant, it has hardly ever been identified in real artworks. This paper reports the identification and discrimination of dragon's blood produced by Dracaena cinnabari, Dracaena draco as well as Daemonorops draco and Daemonorops micracantha by means of gas chromatography/mass spectrometry (GC/MS) within the context of a routine analysis of binding media used in works of art. The detection of specific flavonoid marker compounds in both underivatised and methylated methanol extracts provided the first evidence for the use of dragon's blood from all four species in various works of art from the fifteenth to nineteenth centuries. Dragon's blood was mainly used as a red colourant in gold lacquers as well as translucent glazes and paints, e.g. in reverse-glass paintings (Hinterglasmalerei).

  1. First Description of the Karyotype and Sex Chromosomes in the Komodo Dragon (Varanus komodoensis).

    Science.gov (United States)

    Johnson Pokorná, Martina; Altmanová, Marie; Rovatsos, Michail; Velenský, Petr; Vodička, Roman; Rehák, Ivan; Kratochvíl, Lukáš

    2016-01-01

    The Komodo dragon (Varanus komodoensis) is the largest lizard in the world. Surprisingly, it has not yet been cytogenetically examined. Here, we present the very first description of its karyotype and sex chromosomes. The karyotype consists of 2n = 40 chromosomes, 16 macrochromosomes and 24 microchromosomes. Although the chromosome number is constant for all species of monitor lizards (family Varanidae) with the currently reported karyotype, variability in the morphology of the macrochromosomes has been previously documented within the group. We uncovered highly differentiated ZZ/ZW sex microchromosomes with a heterochromatic W chromosome in the Komodo dragon. Sex chromosomes have so far only been described in a few species of varanids including V. varius, the sister species to Komodo dragon, whose W chromosome is notably larger than that of the Komodo dragon. Accumulations of several microsatellite sequences in the W chromosome have recently been detected in 3 species of monitor lizards; however, these accumulations are absent from the W chromosome of the Komodo dragon. In conclusion, although varanids are rather conservative in karyotypes, their W chromosomes exhibit substantial variability at the sequence level, adding further evidence that degenerated sex chromosomes may represent the most dynamic genome part.

  2. Measurement of intraocular pressure in healthy unanesthetized inland bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Schuster, Eva J; Strueve, Julia; Fehr, Michael J; Mathes, Karina A

    2015-06-01

    To evaluate the use of rebound and applanation tonometry for the measurement of intraocular pressure (IOP) and to assess diurnal variations in and the effect of topical anesthesia on the IOP of healthy inland bearded dragons (Pogona vitticeps). 56 bearded dragons from 4 months to 11 years old. For each animal following an initial ophthalmic examination, 3 IOP measurements were obtained on each eye between 9 AM and 10 AM, 1 PM and 2 PM, and 5 PM and 7 PM by use of rebound and applanation tonometry. An additional measurement was obtained by rebound tonometry for each eye in the evening following the application of a topical anesthetic to evaluate changes in the tolerance of the animals to the tonometer. Descriptive data were generated, and the effects of sex, time of day, and topical anesthesia on IOP were evaluated. Bearded dragons did not tolerate applanation tonometry even following topical anesthesia. Median daily IOP as determined by rebound tonometry was 6.16 mm Hg (95% confidence interval, 5.61 to 6.44 mm Hg). The IOP did not differ significantly between the right and left eyes. The IOP was highest in the morning, which indicated that the IOP in this species undergoes diurnal variations. Topical anesthesia did not significantly affect IOP, but it did improve the compliance for all subjects. Results indicated that rebound tonometry, but not applanation tonometry, was appropriate for measurement of IOP in bearded dragons. These findings provided preliminary guidelines for IOP measurement and ophthalmic evaluation in bearded dragons.

  3. Adenoviral infection in a collection of juvenile inland bearded dragons (Pogona vitticeps).

    Science.gov (United States)

    Doneley, R J T; Buckle, K N; Hulse, L

    2014-01-01

    Juvenile inland bearded dragons (Pogona vitticeps) from a breeding collection in south-east Queensland were presented at age 6-10 weeks with neurological signs, poor growth and occasional deaths. Histopathological examination revealed that six of eight lizards had multifocal non-suppurative hepatitis associated with 5-10 μm diameter, smudgy, basophilic, hyaline intranuclear inclusion bodies that marginated the nuclear chromatin. These histological lesions were considered consistent with adenoviral hepatitis. Infection with adenovirus was confirmed positive in one of the eight dragons by PCR for adenoviral DNA. DNA was extracted from formalin-fixed paraffin-embedded pooled tissues of the juvenile inland bearded dragons and tested using a nested-PCR protocol with primers specific for identification of adenovirus. Sequencing of the one PCR-positive dragon showed 95% nucleotide sequence alignment with agamid atadenovirus 1. Further investigation involved testing the breeding population, including the parents of the affected juveniles. Blood and cloacal samples were collected from the adult population, DNA was extracted and tested by PCR for adenovirus. There was a high percentage of positive results from the samples collected from the breeding population. This is the first reported group outbreak of adenoviral disease in bearded dragons in Australia. © 2014 Australian Veterinary Association.

  4. Standardization of the two-dimensional transcoelomic echocardiographic examination in the central bearded dragon (Pogona vitticeps).

    Science.gov (United States)

    Silverman, S; Sanchez-Migallon Guzman, D; Stern, J; Gustavsen, K A; Griffiths, L G

    2016-06-01

    To objectively and subjectively describe the normal spectrum of two-dimensional echocardiographic findings in the central bearded dragon (Pogona vitticeps). Sixteen central bearded dragons. Central bearded dragons were prospectively evaluated under manual restraint in right and left lateral recumbency to identify imaging planes for reproducible measurements of cardiac chambers, subjective two-dimensional analysis and color Doppler assessment. Echocardiography can be performed through windows in the left and right axillae. The window in the left axilla allows for a subjective and objective assessment of cardiac structure and function. The right axillary window allows for evaluation of pulmonary artery flow. Both views provide data for the presence of pericardial effusion or valvular insufficiency. With optimized imaging planes, cardiac chambers and fractional area change along with fractional shortening in the longitudinal and transverse planes can be calculated. Body weight and cardiac chamber dimensions of males were significantly larger than females. Ventricular fractional area change was the most consistent functional assessment. The majority of animals were found to have no evidence of valvular insufficiency, while approximately half had evidence of pericardial fluid. Pulmonary artery flow was assessed in all patients. Left and right aortic velocities cannot be reliably obtained. This study is the first to generate reference values for cardiac structure and function in clinically healthy central bearded dragons. Valvular insufficiency is not a normal finding in central bearded dragons, while mild pericardial effusion may be. Copyright © 2015 Elsevier B.V. All rights reserved.

  5. In vivo wound healing activity of Dragon's Blood (Croton spp.), a traditional South American drug, and its constituents.

    Science.gov (United States)

    Pieters, L; De Bruyne, T; Van Poel, B; Vingerhoets, R; Totté, J; Vanden Berghe, D; Vlietinck, A

    1995-07-01

    The wound healing activity of dragon'sblood (Croton spp.), in Spanish 'sangre de drago‛ or 'sangre de grado‛, a traditional South American drug, and some of its constituents, including the alkaloid taspine (1), the dihydrobenzufuran lignan 3',4-O-dimethylcedrusin (2) and proantho-cyanidins, was evaluated in vivo on rats, and compared with the wound healing actitivy of synthetic proanthocyanidins. The beneficial effect of dragon's blood on wound healing was confirmed. Dragon's blood stimulated contraction of the wound, formation of a crust, formation of new collagen, and regeneration of the epithelial layer. 3',4-O-Dimethylcedrusin also improved wound healing in vivo by stimulating the formation of fibroblasts and collagen, but crude dragon's blood was more effective. This was due to the proanthocyanidins, present in dragon's blood, which stimulate contraction of the wound and precipitate with proteins forming a dark crust covering the wound, but which delay wound repair by a decreased formation of new fibroblasts.

  6. Numerical Simulation of Wake Effects in the Lee of a Farm of Wave Dragon Wave Energy Converters

    DEFF Research Database (Denmark)

    Beels, C.; Troch, P.; De Visch, K.;

    2009-01-01

    . In this paper wake effects in the lee of a single Wave Dragon WEC and multiple Wave Dragon WECs are studied in a time-dependent mild-slope equation model. The Wave Dragon WEC is a floating offshore converter of the overtopping type. The water volume of overtopped waves is first captured in a basin above mean...... sea level and then drains back to the sea through hydro turbines. The wake dimensions behind a single Wave Dragon WEC are investigated for uni- and multidirectional waves. An increasing directional spreading results in a faster wave redistribution behind the WEC. The power absorption of a farm of five...... Wave Dragon WECs, installed in a staggered grid, is calculated for varying inbetween distances. It is observed that an in-between distance of 2D is preferred, when taking spatial and safety considerations into account....

  7. Thermal relics as hot, warm and cold dark matter in power-law $f(R)$ gravity

    CERN Document Server

    Tian, David Wenjie

    2015-01-01

    We investigate the thermal relics as hot, warm and cold dark matter in $\\mathscr{L}=\\varepsilon^{2-2\\beta}R^\\beta+{16\\pi}m_{\\text{Pl}}^{-2}\\mathscr{L}_m$ gravity, where $\\varepsilon$ is a constant balancing the dimension of the field equation, and $1<\\beta<(4+\\sqrt{6})/5$ for the positivity of energy density and temperature. If light neutrinos serve as hot/warm relics, the entropic number of statistical degrees of freedom $g_{*s}$ at freeze-out and thus the predicted fractional energy density $\\Omega_\\psi h^2$ are $\\beta-$dependent, which relaxes the standard mass bound $\\Sigma m_\

  8. 山东省高校开展舞龙舞狮运动项目探究%Necessities and Feasibility to Blend Traditional National Sports into School Education-Lion and Dragon Dance in Case

    Institute of Scientific and Technical Information of China (English)

    孙强

    2015-01-01

    舞龙舞狮运动是我国民族传统体育项目,具有健身娱乐、教育、表演竞赛等功能,开展舞龙舞狮运动可以弘扬民族文化,改革和丰富教学内容,扩大影响,促进专业发展。本文通过问卷和走访等方法,针对山东省普通高校开展舞龙舞狮运动的必要性、教学形式和教学时数等问题进行调查,结果表明广大师生对高校开展舞龙舞狮运动有较高的赞同率。%Dragon-dance & lion-dance are traditional national sports items, and have many functions such as fitness entertainment, education, performance, competition and economic, etc. Practice dragon-dance & lion-dance in sports universities can develop national culture, reform and enrich the teaching contents, spread well-knownness , move forward specialty development. By the questionnaire and interview, the article investigates the necessity, teaching forms and teaching hour, etc. for opening the dragon-dance & lion-dance in our school. The result shows that most teachers and students approve the items opening in our school, at last, we put forward some suggestions on how to practice dragon-dance and lion-dance.

  9. The feasibility study of dragon dance movement as community sports in Anhui Province%舞龙运动进入安徽省社区体育的可行性研究

    Institute of Scientific and Technical Information of China (English)

    于永光; 刘爱; 余少敏

    2015-01-01

    In this paper, documentray analysis, interview, questionaire and statistics were adopted to study the dragon dance movement status and the community sports situations in AnhuiProvince in order to prove the feasibility of introducing the dragon dance movement as community sport to Anhui Province. It is supposed to be feasible for some reasons as followed, dragon dance movement can enrich the community sports in forms, enjoyment, performance and entertainment, help national traditional sports culture inheritance and promote the development of dragon dance movement as well as the community sports.%通过文献资料法、访谈法、问卷调查法和数理统计法等研究方法,在对安徽省舞龙运动现状和社区体育现状调查分析的基础上,论证舞龙运动进入安徽省社区体育的可行性。认为舞龙运动引入安徽省社区体育具有可行性,可以进一步丰富社区体育的内容,增强社区体育的观赏性、表演性和娱乐性,开辟了民族传统体育文化传承的纽带,既提升了舞龙运动的发展空间,又拓展了社区体育的发展空间。

  10. Dragon's blood dropping pills have protective effects on focal cerebral ischemia rats model.

    Science.gov (United States)

    Xin, Nian; Yang, Fang-Ju; Li, Yan; Li, Yu-Juan; Dai, Rong-Ji; Meng, Wei-Wei; Chen, Yan; Deng, Yu-Lin

    2013-12-15

    Dragon's blood is a bright red resin obtained from Dracaena cochinchinensis (Lour.) S.C.Chen (Yunnan, China). As a traditional Chinese medicinal herb, it has great traditional medicinal value and is used for wound healing and to stop bleeding. Its main biological activity comes from phenolic compounds. In this study, phenolic compounds were made into dropping pills and their protective effects were examined by establishing focal cerebral ischemia rats model used method of Middle Cerebral Artery Occlusion (MCAO), and by investigating indexes of neurological scores, infarct volume, cerebral index, cerebral water content and oxidation stress. Compared to model group, high, middle and low groups of Dragon's blood dropping pills could improve the neurological function significantly (pDragon's blood dropping pills had protective effects on focal cerebral ischemia rats.

  11. General Situation on Clinical Application of Dragon-Tiger Fighting Needling Technique in the Recent Years

    Institute of Scientific and Technical Information of China (English)

    何龙; 袁宜勤; 钟耀东; 何贤发; 黄国琪

    2008-01-01

    @@ Depending upon the descriptions of the ancient literature, such as Jin Zhen Fu (Odes to Golden Needles, ), the dragon-tiger fighting needling technique has the effects to dredge the meridians, circulate qi, activate blood, stop and remove pain. "Dragon" implies to twist the needle leftward for reinforcing, and "tiger" means to twist the needle rightward for reducing. To twist the needle leftward and rightward alternately is termed "fighting". After the arrival of the needling sensation by inserting the needle to the proper depth, the needle is first twisted leftward with the thumb forward in a method of nine yang numbers, and then twisted backward and rightward with the thumb backward in a method of six yin numbers, in alternation of reinforcing and reducing repeatedly. Therefore, the general information on clinical application of dragon-tiger fighting needling technique in the recent sixteen years is given in the following.

  12. External validation of the ability of the DRAGON score to predict outcome after thrombolysis treatment

    DEFF Research Database (Denmark)

    Ovesen, Christian Aavang; Christensen, Anders; Nielsen, J K

    2013-01-01

    Easy-to-perform and valid assessment scales for the effect of thrombolysis are essential in hyperacute stroke settings. Because of this we performed an external validation of the DRAGON scale proposed by Strbian et al. in a Danish cohort. All patients treated with intravenous recombinant plasmino......Easy-to-perform and valid assessment scales for the effect of thrombolysis are essential in hyperacute stroke settings. Because of this we performed an external validation of the DRAGON scale proposed by Strbian et al. in a Danish cohort. All patients treated with intravenous recombinant...... and their modified Rankin Scale (mRS) was assessed after 3 months. Three hundred and three patients were included in the analysis. The DRAGON scale proved to have a good discriminative ability for predicting highly unfavourable outcome (mRS 5-6) (area under the curve-receiver operating characteristic [AUC-ROC]: 0...

  13. Measurements of Overtopping Flow Time Series on the Wave Dragon, Wave Energy Converter

    DEFF Research Database (Denmark)

    Tedd, James; Kofoed, Jens Peter

    2009-01-01

    A study of overtopping flow series on the Wave Dragon prototype, a low crested device designed to maximise flow, in a real sea, is presented. This study aims to fill the gap in the literature on time series of flow overtopping low crested structures. By comparing to a simulated flow the character......A study of overtopping flow series on the Wave Dragon prototype, a low crested device designed to maximise flow, in a real sea, is presented. This study aims to fill the gap in the literature on time series of flow overtopping low crested structures. By comparing to a simulated flow...... the characteristics of the overtopping flow are discussed and the simulation algorithm is tested. Measured data is shown from a storm build up in October 2006, from theWave Dragon prototype situated in an inland sea in Northern Denmark. This wave energy converter extracts energy from the waves, by funnelling them...

  14. Efficiency Calibration Measurement And Geant Simulation Of The Dragon Bgo Gamma Ray Array At Triumf

    CERN Document Server

    Gigliotti, D G

    2005-01-01

    A gamma ray array to detect the characteristic gammas emitted from astrophysically significant, radiative proton and alpha capture reactions, was built as part of the Detector of Recoils And Gammas Of Nuclear reactions (DRAGON) spectrometer at ISAC/TRIUMF. The DRAGON array consists of a collection of 30 hexagonal BGO detectors measuring 7.62 cm long by 5.58 cm across the face. A simulation was built with the particle-tracking program GEANT v3.21. The efficiency of the array was measured using calibrated sources of various gamma energies and compared to simulated results. For the cases where the activity of the source was not well known the sources were calibrated using a standard NaI detector of known efficiency. The agreement between simulation and measured differences is more than adequate for proposed DRAGON experiments. The analysis and results of the comparison between measured and simulated efficiency will be discussed in this thesis.

  15. Experimental Modelling of the Overtopping Flow on the Wave Dragon Wave Energy Converter

    DEFF Research Database (Denmark)

    Parmeggiani, Stefano; Kofoed, Jens Peter

    The Wave Dragon is a floating slack-moored Wave Energy Converter (WEC) of the overtopping type. Oncoming waves are focused by two wing reflectors towards the ramp of the device, surge-up and overtop into a reservoir placed at a higher level than the surface of the sea. The energy production takes...... place as the water is led back to the sea through a set of low-head hydro-turbines. After many years of development, Wave Dragon (WD) is now facing the phase of pre-commercial demonstration. In this phase it is very important to be able to use the available data to predict the performances of the device...... at different scales and locations. A flexible and comprehensive modelling tool is therefore highly required. Wave Dragon produces power through different steps of energy conversion: 1. Primary energy conversion: overtopping – The energy content of the wave (partly in the kinetic and partly in the potential...

  16. Dragon's Blood extract has antithrombotic properties, affecting platelet aggregation functions and anticoagulation activities.

    Science.gov (United States)

    Xin, Nian; Li, Yu-Juan; Li, Yan; Dai, Rong-Ji; Meng, Wei-Wei; Chen, Yan; Schlappi, Michael; Deng, Yu-Lin

    2011-05-17

    Dragon's Blood from Dracaena cochinchinensis (Lour.) S.C. Chen (Yunnan, China), as a traditional Chinese medicinal herb, was shown to have certain antithrombotic effects. A new preparation process was used to extract effective components from Dragon's Blood. A 95% ethanol extract A (EA) and a precipitate B (PB) fraction were obtained and compared. Reliability of the preparation process was validated by pharmacodynamic experiments. A rat/mouse thrombosis and blood stasis model was developed for this study, and EA and PB effects on thrombosis, platelet functions and blood coagulation activities were analyzed. It was observed that the EA fraction had significantly better inhibitory effects than the PB fraction on thrombosis (pDragon's Blood contained pharmacologically effective compounds with antithrombotic effects, partially improving platelet function and anticoagulation activity. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

  17. Effect of coordinate rotation on 3D molecular descriptors computed by DragonX

    CERN Document Server

    Hechinger, Manuel

    2012-01-01

    Quantitative structure-property relations (QSPR) employing descriptors derived from the 3D molecular structure are frequently applied for property prediction in various fields of research. In particular, DragonX is one of the most widely used software packages for descriptor calculation. The reliability of 3D molecular descriptors computed by DragonX has lately been investigated, thereby focusing on the effect of computational methods used for molecular structure optimization on the accuracy of the resulting molecular descriptors. The present contribution extends the analysis to a more intrinsic problem of DragonX descriptor evaluation resulting from the sensitivity of the computed 3D descriptors on the coordinate system used for molecule description. Evaluating several 3D descriptors for converged molecular structures rotated around all 3 spatial axes (affine coordinate transformations) yields systematically varying descriptor values. Since this unphysical behavior severely affects the descriptor reliability...

  18. Multi-channel quantum dragons from rectangular nanotubes with even-odd structure

    Science.gov (United States)

    Inkoom, Godfred; Novotny, Mark

    Recently, a large class of nanostructures called quantum dragons have been discovered theoretically. Quantum dragons are nanostuctures with correlated disorder but have an electron transmission probability  (E) =1 for all energies E when connected to idealized leads. Hence for a single channel, the electrical conductance for a two-probe measurement should give the quantum of conductance Go =2e2/h . The time independent Schrödinger equation for the single band tight binding model is solved exactly to obtain  (E) . We have generalized the matrix method and the mapping methods of in order to study multi-channel quantum dragons for rectangular nanotubes with even-odd structure. The studies may be relevant for experimental rectangular nanotubes, such as MgO, copper phthalocyanine or some types of graphyne.. Supported in part by NSF Grant DMR-1206233.

  19. Chasing the dragon-Toxic leukoencephalopathy(Heroin-Induced Spongiform Leukoencephalopathy)

    Institute of Scientific and Technical Information of China (English)

    初建平

    2012-01-01

    @@ "Chasing the dragon" is a toxic leukoencephalopathy caused by inhalation of heroin fumes.The term"chasing the dragon"appears to have originated in China in the 1920s and became a popular mechanism of heroin administration in the 1950s in Hong Kong because the drug was cheap but impure.A small quantity of powder is placed on aluminium foil,which is then heated underneath with a lighter or matches.The heroin liquefies into a reddish brown glob, which moves around on the foil and emits a white vapor.The glob or"dragon"is"chased"with the lighter underneath while the vapor is sucked through a straw or pipe.

  20. Statistical Outliers and Dragon-Kings as Bose-Condensed Droplets

    CERN Document Server

    Yukalov, V I

    2012-01-01

    A theory of exceptional extreme events, characterized by their abnormal sizes compared with the rest of the distribution, is presented. Such outliers, called "dragon-kings", have been reported in the distribution of financial drawdowns, city-size distributions (e.g., Paris in France and London in the UK), in material failure, epileptic seizure intensities, and other systems. Within our theory, the large outliers are interpreted as droplets of Bose-Einstein condensate: the appearance of outliers is a natural consequence of the occurrence of Bose-Einstein condensation controlled by the relative degree of attraction, or utility, of the largest entities. For large populations, Zipf's law is recovered (except for the dragon-king outliers). The theory thus provides a parsimonious description of the possible coexistence of a power law distribution of event sizes (Zipf's law) and dragon-king outliers.