New data on winter crane flies (Diptera: Trichoceridae) of Korea with description of a new species

PETRAŠ,IŪ,NAS, ANDRIUS,PODENAS, SIGITAS Magnolia Press 2017 Zootaxa Vol.4311 No.4

<P>Species of Trichoceridae Rondani known to occur on the Korean Peninsula are reviewed; eight of these are recorded for Korea for the first time. Trichocera (Saltrichocera) sapporensis Alexander, 1935 and T. (S.) maculipennis pictipennis Alexander, 1930 are proposed as synonyms of T. (S). maculipennis punctipennis Brunetti, 1912 which is transferred to a subspecific rank. A new species-Trichocera (Saltrichocera) latipons sp. nov. is described. </P>

적극적 교육

Petra de Llanos,Lloret, Gemma 한국외국어대학교 1993 한국외국어대학교 논문집 Vol.26 No.-

Gender Mainstreaming in European Commission Development Policy in Asia : A Transformative Tool?

Petra DEBUSSCHER Ewha Womans University Press 2010 Asian Journal of Women's Studies(AJWS) Vol.16 No.3

This article examines gender mainstreaming in European Commission (EC) development aid to Asian countries through quantitative and qualitative study of program documents. First, gender mainstreaming is assessed as a set of techniques of policy practice focusing on gender mainstreaming language, its place in policy texts and inclusion in budgets and indicators. Next, it is approached as a philosophy or frame of analysis, evaluating its transformative potential and analyzing how the issue of gender (in)equality is tackled. I conclude that gender mainstreaming in EC-Asian relations has flourished as an expert-bureaucratic tool, but its transformative potential has been neglected. The intra-European Union (EU) agenda, as well as the lack of space for Asian civil society voices, are proposed as explanations.

A summertime near-ground velocity profile of the Bora wind

Petra Lepri,Hrvoje Kozmar,Željko Večenaj,Branko Grisogono 한국풍공학회 2014 Wind and Structures, An International Journal (WAS Vol.19 No.5

While effects of the atmospheric boundary layer flow on engineering infrastructure are more or less known, some local transient winds create difficulties for structures, traffic and human activities. Hence, further research is required to fully elucidate flow characteristics of some of those very unique local winds. In this study, important characteristics of observed vertical velocity profiles along the main wind direction for the gusty Bora wind blowing along the eastern Adriatic coast are presented. Commonly used empirical power-law and the logarithmic-law profiles are compared against unique 3-level high-frequency Bora measurements. The experimental data agree well with the power-law and logarithmic-law approximations. An interesting feature observed is a decrease in the power-law exponent and aerodynamic surface roughness length, and an increase in friction velocity with increasing Bora wind velocity. This indicates an urban-like velocity profile for smaller wind velocities and rural-like velocity profile for larger wind velocities, which is due to a stronger increase in absolute velocity at each of the heights observed as compared to the respective velocity gradient (difference in average velocity among two different heights). The trends observed are similar during both the day and night. The thermal stratification is near neutral due to a strong mechanical mixing. The differences in aerodynamic surface roughness length are negligible for different time averaging periods when using the median. For the friction velocity, the arithmetic mean proved to be independent of the time record length, while for the power-law exponent both the arithmetic mean and the median are not influenced by the time averaging period. Another issue is a large difference in aerodynamic surface roughness length when calculating using the arithmetic mean and the median. This indicates that the more robust median is a more suitable parameter to determine the aerodynamic surface roughness length than the arithmetic mean value. Variations in velocity profiles at the same site during different wind periods are interesting because, in the engineering community, it has been commonly accepted that the aerodynamic characteristics at a particular site remain the same during various wind regimes.

Bora wind characteristics for engineering applications

Petra Lepri,Zeljko Vecenaj,Hrvoje Kozmar,Branko Grisogono 한국풍공학회 2017 Wind and Structures, An International Journal (WAS Vol.24 No.6

Bora is a strong, usually dry temporally and spatially transient wind that is common at the eastern Adriatic Coast and many other dynamically similar regions around the world. One of the Bora main characteristics is its gustiness, when wind velocities can reach up to five times the mean velocity. Bora often creates significant problems to traffic, structures and human life in general. In this study, Bora velocity and near-ground turbulence are studied using the results of three-level high-frequency Bora field measurements carried out on a meteorological tower near the city of Split, Croatia. These measurements are analyzed for a period from April 2010 until June 2011. This rather long period allows for making quite robust and reliable conclusions. The focus is on mean Bora velocity, turbulence intensity, Reynolds shear stress and turbulence length scale profiles, as well as on Bora velocity power spectra and thermal stratification. The results are compared with commonly used empirical laws and recommendations provided in the ESDU 85020 wind engineering standard to question its applicability to Bora. The obtained results report some interesting findings. In particular, the empirical power- and logarithmic laws proved to fit mean Bora velocity profiles well. With decreasing Bora velocity there is an increase in the power-law exponent and aerodynamic surface roughness length, and simultaneously a decrease in friction velocity. This indicates an urban-like velocity profile for smaller wind velocities and a rural-like velocity profile for larger wind velocities. Bora proved to be near-neutral thermally stratified. Turbulence intensity and lateral component of turbulence length scales agree well with ESDU 85020 for this particular terrain type. Longitudinal and vertical turbulence length scales, Reynolds shear stress and velocity power spectra differ considerably from ESDU 85020. This may have significant implications on calculations of Bora wind loads on structures.

Economic Sanctions and Leader Survival, 1945-2006

Petra Hendrickson,박요한 서울대학교 국제학연구소 2019 Journal of International and Area Studies Vol.26 No.2

Our study joins recent scholarship that examines the political impact of economic sanctions on targeted societies. While some studies find that sanctions destabilize the incumbent leadership of targeted countries, others reveal no relationship between sanctions and political survival. In this study, we seek to clarify the effect of economic sanctions on leader survival by identifying and addressing the contrasting and conditional expectations for the political effects of sanctions underspecified in previous research. We also provide the most comprehensive statistical test, for the 1945 to 2006 period. Our analysis shows that economic sanctions help targeted autocratic leaders to extend their stay in power. However, sanctions are found to exert no discernable political effects to targeted leaders in democracies.

Reappraising “Apprenticeship of Observation”: Belief Development within Pre-service Teachers

Petra Glithero 한국초등영어교육학회 2015 KAPEE International Conference Vol.2015 No.-

An Annotated Translation to Yi Gok’s Jukbuinjeon (Biography of Lady Bamboo)

Petra Svakova 한국학중앙연구원 한국학중앙연구원 2019 THE REVIEW OF KOREAN STUDIES Vol.22 No.2

How do teachers learn? A study on the policy and practice of teacher professional development in Malaysia

Yusof Petras,Hazri Jamil,Abdul Rashid Mohamed 한국교육개발원 2012 KEDI Journal of Educational Policy Vol.9 No.1

As the correlation of teacher professional development with student achievement has recently gained evidence in the scientific discourse on teacher professionalism and educational development, issues related to professional development have become a crucial component of nearly every education policy. In the context of reforms aiming at the improvement of educational systems, it has been widely acknowledged that teachers are to serve as essential agents of improving the educational system, rather than being one of the numerous ‘variables’ that need to be changed. This study explores the various formal and non-formal activities, as well as the institutional environment of in-service teacher learning, from the viewpoint of teachers serving in a metropolitan area of Malaysia.

Feeding the extra billions: strategies to improve crops and enhance future food security

Stamm, Petra,Ramamoorthy, Rengasamy,Kumar, Prakash P. The Korean Society of Plant Biotechnology 2011 Plant biotechnology reports Vol.5 No.2

The ability to feed an expanding world population poses one of the greatest challenges to mankind in the future. Accompanying the increased demand for food by the expected nine billion inhabitants of Earth in 2050 will be a continual decrease in arable land area, together with a decline in crop yield due to a variety of stresses. For these formidable challenges to be met, future crops should not only by high-yielding, but also stress-tolerant and disease-resistant. In this review, we highlight the importance of genetic engineering as an indispensable tool to generate just such future crops. We briefly discuss strategies and available tools for biotechnological crop improvement and identify selected examples of candidate genes that may be manipulated so that current biological maxima in yield may be surpassed by comfortable margins. Future prospects and the necessity for basic research aimed at identifying novel target genes are also discussed.