http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Global trends in the development of crop protection products
SangSoon Park 한국응용곤충학회 2017 한국응용곤충학회 학술대회논문집 Vol.2017 No.04
One of the dramatic changes we are faced with is ever fast growing population on the earth, which is anticipated to reach 10 billion by 2050, according to the report from UN. On the top of that, we need to address the issue of global warming, changes in consumption pattern and decrease in farmlands. These challenges ask us to achieve 60% increase in agricultural productivity to secure enough food to support the world population (Climate change and food security, FAO, 2016). The crop protection industry develops new products from various chemical families and different modes of action. The new products should have not only excellent biological activities, but also favorable toxicological profile to keep diversity in ecosystem and meet very strict regulatory requirements. Also should be active enough to control resistant pests, diseases and weeds. The crop protection products are very useful tool to secure stable food supply, if used in recommended way according to the product label.
박상순 ( Park Sangsoon ) 한국연극교육학회 2016 연극교육연구 Vol.29 No.-
This study aims to examine the type of performing arts festival viewed in the characterization. The majority of the festivals in Korea have begun since the start of the local autonomy in 1995. Their rapid growth reflects a desire to give each city a new cultural image, encourage booming for the local economy and a wish for a better life. However, there have been many problems along the way, including similar programming, unstable philosophical direction and immature administration. Developing a Unique characterization for a festival is the best solution for resolving these incurring problems. This study is going to illustrate persuasive classifications of festivals according to their own distinctive qualities, to provide practical frameworks to analyze performing arts festivals. For a first step, I will browse a general tendency of the festivals, based on the current situations of the major Korean festivals : beginning year, compositon of contents, region, auspices. Special attention will be put on the way that the festivals are organized, focusing specifically on the period after the local autonomy. For a second step, six kinds of characterizations for festivals will be introduced, considering their aesthetic quality and administrative aspects. It is as fallow : ⑴Genre specific festival - focuses on specific genres to develop their own characterization, ⑵Site specific festival - searches for creative spatial aesthetics and extends the possibility of cultural contents, ⑶Fringe specific festival - crosses boundaries of existing art genres and current discourse on the arts, ⑷City regenerative festival - reinforces the power of city through a festival, ⑸Production based festival - focuses on the premiere of commissioned works and new aesthetics for arts festivals, ⑹Itinerancy for presenting works - strives to find direct and dynamic cultural exchanges by organizing different venues. Analyzing several exemplary festivals internationally and locally in terms of its successful characterization and effects will back these up.
Efficient Fast Neutron Generation in a Femtosecond, Deuterated, Polystyrene Plasma
이성만,Sangsoon Park,Kwon-Hae Yea,Duck-Hee Kwon,Park,YoungUk Jeong,Hyungki Cha 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.2
Fast neutrons were generated from a deuterated polystyrene (C8D8) solid target by using an ultraintense Ti:sapphire laser with a 27-fs pulse width and a 900-mJ pulse energy. The dependency of the neutron generation on the laser peak power was analyzed in terms of the deuteron energy. At a pulse energy of 900 mJ, a neutron yield of 4.4 × 106 neutrons/shot was obtained for a target thickness of 45 μm. The number of generated neutrons corresponds to an approximately 63 times increase in comparison to that obtained with a 260-mJ, 27-fs laser. Fast neutrons were generated from a deuterated polystyrene (C8D8) solid target by using an ultraintense Ti:sapphire laser with a 27-fs pulse width and a 900-mJ pulse energy. The dependency of the neutron generation on the laser peak power was analyzed in terms of the deuteron energy. At a pulse energy of 900 mJ, a neutron yield of 4.4 × 106 neutrons/shot was obtained for a target thickness of 45 μm. The number of generated neutrons corresponds to an approximately 63 times increase in comparison to that obtained with a 260-mJ, 27-fs laser.
A laser-induced repetitive fast neutron source applied for gold activation analysis.
Lee, Sungman,Park, Sangsoon,Lee, Kitae,Cha, Hyungki American Institute of Physics 2012 Review of scientific instruments Vol.83 No.12
<P>A laser-induced repetitively operated fast neutron source was developed for applications in laser-driven nuclear physics research. The developed neutron source, which has a neutron yield of approximately 4 10(5) n/pulse and can be operated up to a pulse repetition rate of 10 Hz, was applied for a gold activation analysis. Relatively strong delayed gamma spectra of the activated gold were measured at 333 keV and 355 keV, and proved the possibility of the neutron source for activation analyses. In addition, the nuclear reactions responsible for the measured gamma spectra of gold were elucidated by the 14 MeV fast neutrons resulting from the D(t,n)He(4) nuclear reaction, for which the required tritium originated from the primary fusion reaction, D(d,p)T(3).</P>
( Ozlem Altintas ),( Sangsoon Park ),( Seung-jae V. Lee ) 생화학분자생물학회(구 한국생화학분자생물학회) 2016 BMB Reports Vol.49 No.2
Insulin/insulin-like growth factor (IGF)-1 signaling (IIS) pathway regulates aging in many organisms, ranging from simple invertebrates to mammals, including humans. Many seminal discoveries regarding the roles of IIS in aging and longevity have been made by using the roundworm Caenorhabditis elegans and the fruit fly Drosophila melanogaster. In this review, we describe the mechanisms by which various IIS components regulate aging in C. elegans and D. melanogaster. We also cover systemic and tissue-specific effects of the IIS components on the regulation of lifespan. We further discuss IIS-mediated physiological processes other than aging and their effects on human disease models focusing on C. elegans studies. As both C. elegans and D. melanogaster have been essential for key findings regarding the effects of IIS on organismal aging in general, these invertebrate models will continue to serve as workhorses to help our understanding of mammalian aging. [BMB Reports 2016; 49(2): 81-92]
하태호,박상순,이창우,송준엽 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
Optical scattering measurement methods are one of the best ways to reveal surface statistics without contacting the object. Conventional measurement systems generally collect scattered light only at designated position with fixed incident condition. However, it is insufficient to analyze to the complex scattering phenomena. The detector at given positions may miss to collect important scattering characteristics that reflect surface information. In order to analyze scattering characteristics from the object that we are interested, the measurement system that can detect spatially scattered lights from the object is needed. Therefore, we developed the prototype of miniaturized 3D -scattering light pattern measurement system. The size of the system is about 296 mm * 234 mm * 374 mm. This system can change angle of incidence and measure 3D-scattering light pattern from the object. Experimental results showed that our developed prototype of miniaturized 3D-scattering light pattern measurement system have nanowatt-level sensitivity and can measure wide range of scattered light pattern.
이성만,권덕희,Sangsoon Park,차형기 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.1
To improve the efficiency of laser-induced deuteron generation used for neutron generation via D-D nuclear reaction, we investigated the angular dependences of deuterons and electrons with respect to the target normal and the time-of-flight (TOF) intensity distributions of particles for thick deuterated polystyrene solid-targets with and without coating a thin aluminum layer on the front surfaces of the targets. The peak deuteron energies of 90 . 213 keV, which were measured for polystyrene targets with thicknesses of 50 . 130 μm in the target’s rear normal direction, were increased to 132 . 227 keV for the double-layer target with a front surface coated with 0.3-μm thickness of aluminum. These correspond to 6.9 . 45.8% improvements in the peak deuteron energy.