• Title/Summary/Keyword: small screen

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Liquid-free milling to prepare a cocrystal of ibuprofen and nicotinamide (액체 첨가가 없는 밀링법을 이용한 ibuprofen과 nicotinamide의 공결정 형성)

  • Ham, Jinok;Jang, Jisun;Kim, Il Won
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.26 no.6
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    • pp.232-237
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    • 2016
  • Cocrystallization of active pharmaceutical ingredients has been widely recognized as a versatile tool to regulate the physical properties of pharmaceutical compounds through designed crystal structures. Grinding or milling has been especially useful to screen the feasibility of cocrystal formation, and the addition of a small amount of liquid is routinely necessary. In the present study, the effect of temperature was studied for the milling cocrystallization of ibuprofen and nicotinamide to establish a liquid-free method. The milling-induced cocrystallization was more effective with liquid nitrogen cooling than at room temperature, which was confirmed by XRD and DSC analyses. This behavior was attributed to the limited molecular mobility below the glass transition temperatures of the cocrystal components, which made it effective to destruct the crystals of raw materials and consequently form the ibuprofen/nicotinamide cocrystal. Further studies would be necessary to establish the utility of the current conclusion to the field of pharmaceutical crystallization.

A Study on Urban Environmental Climate Mapping Method for Sustainable Urban Planning in Daegu (대구지역의 환경친화적 도시계획을 위한 도시환경기후지도 작성에 관한 연구)

  • Park, Myung-Hee;Jung, Woo-Sik;Kim, Hae-Dong
    • Journal of Environmental Science International
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    • v.20 no.4
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    • pp.465-482
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    • 2011
  • To preserve atmospheric environment of urban areas, it needs to create urban space considering air pollution sources and natural and geographical properties such as wind circulation. According to this study could examine climate and environmental characteristics of Daegu and accordingly suggest a climate map in urban environment and an "advice map" in urban planning. The urban area(area paved with asphalt and concrete) of Daegu has increased by more than five times since 1960. In addition, the analysis of thermal environment through satellite data shows that the surface temperature between a place paved with artificial structures and a farmland shows $10{\sim}20^{\circ}C$ difference during the daytime in the summer. Regarding the parks inhibiting the heat island of a city have the small area of trees, and the road paved with concrete is wide so that they hardly serve as the source of heat absorption. As Apsan is located to the south of Daegu and Palgonsan to the north and Daegu has east high west low type, mountain wind from mountains in the south and north passes a city and delivers heat and air pollutions at night. In the west of Daegue, there is the poorest environment and industrial facilities and environmental basic facilities are mostly located, so large residential complexes that are being built around the industrial facilities as if they set up a folding screen and therefore the poor environment is increasingly worse.

Developing Virtual Screening Program for Lead Identification (선도화합물 탐색을 위한 고효율가상탐색 프로그램 개발)

  • Nam, Ky-Youb;Cho, Yong-Kee;Lee, Chang-Joon;Shin, Jae-Hong;Choi, Jung-Won;Gil, Joon-Min;Park, Hark-Soo;Hwang, Il-Sun;No, Kyoung-Tai
    • Proceedings of the Korean Society for Bioinformatics Conference
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    • 2004.11a
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    • pp.181-190
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    • 2004
  • The docking and in silico ligand screening procedures can select small sets of lead -like candidates from large libraries of either commercially or synthetically available compounds; however, the vast number of such molecules make the potential size of this task enormous. To accelerate the discovery of drugs to inhibit several targets, we have exploited massively distributed computing to screen compound libraries virtually. The Korea@HOME project was launched in Feb. 2002, and one year later, more than 1200 PC's have been recruited. This has created a 31 -gigaflop machine that has already provided more than 1400 hours of CPU time. It has all owed databases of millions of compounds to be screened against protein targets in a matter of days. Now, the virtual screening software suitable for distributed environments is developed by BMD. It has been evaluated in terms of the accuracy of the scoring function and the search algorithm for the correct binding mode.

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A Study on the Effects that Personal Characteristics of Market Maven and Time Orientation have on Mobile Shopping - With a Focus on Mobile Shopping - (패션 및 뷰티 제품의 모바일 쇼핑에 영향을 미치는 마켓 메이븐 및 시간지향특성에 관한 연구)

  • Nam, Miwoo
    • Journal of the Korean Society of Costume
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    • v.64 no.5
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    • pp.30-49
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    • 2014
  • Mobile shopping, through the use of the smart phone, has become a very popular shopping method for consumers due to it not being limited by time or place. This research aims do the following:1)find the causes for consumers shifting to mobile shopping with the focus on fashion and beauty items; and in order to so, this research will use the TAM that was found by David et al (1989), and 2) distinguish any behavioral differences between consumer groups divided into purchasing intention of fashion and beauty items through smart phone. Path analysis was performed to verify the cause-and-effect relationship between the variables. Personal characteristics(i.e. market maven, time orientation), perceived usability, ease of use, attitude towards mobile shopping, and purchase intentions were all treated as dependant variables. The results showed that attitude towards mobile shopping was the most important variable on mobile shopping intentions. Time-oriented and Market Maven were thought to affect mobile shopping attitude and the dependent variables of purchase intention. Also, when purchasing smart phones, consumers highly valued smart phone's popularity; people with higher purchasing intention mainly used entertainment and utility apps. The following are the main reasons for not purchasing through mobile shopping: they are slower than computers, inconveniences in viewing due to small size of the screen, and security issues. The consumers used the internet as their main source of acquiring daily information. In this research, factors that affect the purchase intention were studied. However, it is difficult to firmly insist that this research correctly predicts the actual purchase intention-further studies need to be done to investigate the relationship between mobile purchase intention and actual purchase intention.

A Study on the Actual Conditions and Characteristics of Mammographic Units in Some Area (일부지역 유방촬영장치의 현황 및 특성에 관한 연구)

  • Park, Jin-Young;Baek, Seong-Min
    • Journal of the Korean Society of Radiology
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    • v.6 no.2
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    • pp.121-127
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    • 2012
  • Of this study, it was found that there were 250 mammographic units in total installed and used in the areas for this study, and 36 units were used in general hospitals, 53 units in hospitals and 116 units in clinics. That is, the units in clinics accounted for 50% out of the whole units. As for the image acquisition method, it was found there were 131 units using F/S, 67 units using CR and 7 units using DR respectively. At present, F/S system was mainly used in the areas. As for the materials of target/filter, it was found that Mo/Mo was mostly used (66%), followed by Mo/Rh (25%). As for the size of focus, both 0.1 mm for small focus and 0.3 mm for large focus were mainly used for the units.

Development of active discharge tester for high capacity lithium-ion battery (대용량 리튬 이온 배터리용 Active 방전시험기의 개발)

  • Park, Joon-Hyung;Yunana, Gani Dogara;Park, Chan Won
    • Journal of Industrial Technology
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    • v.40 no.1
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    • pp.13-18
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    • 2020
  • Lithium-ion batteries have a small volume, light weight and high energy density, maximizing the utilization of mobile devices. It is widely used for various purposes such as electric bicycles and scooters (e-Mobility), mass energy storage (ESS), and electric and hybrid vehicles. To date, lithium-ion batteries have grown to focus on increasing energy density and reducing production costs in line with the required capacity. However, the research and development level of lithium-ion batteries seems to have reached the limit in terms of energy density. In addition, the charging time is an important factor for using lithium-ion batteries. Therefore, it was urgent to develop a high-speed charger to shorten the charging time. In this thesis, a discharger was fabricated to evaluate the capacity and characteristics of Li-ion battery pack which can be used for e-mobility. To achieve this, a smart discharger is designed with a combination of active load, current sensor, and temperature sensor. To carry out this thesis, an active load switching using sensor control circuit, signal processing circuit, and FET was designed and manufactured as hardware with the characteristics of active discharger. And as software for controlling the hardware of the active discharger, a Raspberry Pi control device and a touch screen program were designed. The developed discharger is designed to change the 600W capacity battery in the form of active load.

The Interactive Virtual Space with Scent Display for Song-Do Tomorrow-City Experience Complex (향 디스플레이가 가능한 송도 Tomorrow-city 체험관의 상호작용 가상공간)

  • Kim, Jeong-Do;Park, Sung-Dae;Lee, Jung-Hwan;Kim, Jung-Ju;Lee, Sang-Goog
    • Journal of the Ergonomics Society of Korea
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    • v.29 no.4
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    • pp.585-593
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    • 2010
  • Recently, we designed an interactive virtual space for the multi-purpose hall in Songdo Future City, located in Incheon, Korea. The goal of the design is to make a virtual space that is flexible and can be adjusted thanks to its unfixed seats in order to accommodate different and unspecified audience sizes. Virtual images are interactively adjusted according to the distance, position and size of audiences, information about which is detected by 9 photo sensors. To increase the sense of immersion, intensity and reality, we utilized the technology of scent display that can create appropriate scents to match the images on the screen. The intensity and persistence of scents were determined by the size, distance and position of audiences. The virtual image contains background images and reactive images. The background images repeatedly project images of spring, summer, autumn and winter. The reactive images consist of small portraits or pictures or icons that define or characterize the season types, and these are added to the background image according to the distance, position and size of the audiences.

Varietal Variation in Germinative Energy, Capacity and Water Sensitivity for Malting Barley (맥주보리에서 발아세, 발아율 및 수감수성의 품종간 차이)

  • 천종은;이은섭
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.31 no.1
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    • pp.62-67
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    • 1986
  • Forty-nine malting barley varieties were tested at 3 and 8 weeks after harvest, stored in natural glasshouse so as to investigate varietal variation of germinative energy(GE), capacity(GC) and water sensitivity(WS). The differences among GE, GC, promptness index(PI), and WS on paper at two moisture levels (4$m\ell$ and 8$m\ell$ tests) were great at 3 weeks after harvest, but small at 8 weeks after harvest. Excess water depressed the germination of dormant grains. The GE of whole varieties were excellent, but WS of only two varieties, CI 12062 and CI 15631 were bad at 8 weeks after harvest. So in the case of broad germplasm to be used for crossing materials, it is suggested that WS will be tested to screen good quality malting lines. WS was highly significantly correlated with GE, GC, and PI of 8 ml test, but was not with three factors of 4 $m\ell$ test. GE and WS were various with storage period, varieties and grain plumpness, indicated that breeding good grain-filling varieties and improving production practice for good grain-filling would be studied in the future.

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A Study on the Material of Furniture in Goryeo (고려시대 가구재료 연구)

  • Cho, Sook-Kyung
    • Journal of the Korea Furniture Society
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    • v.25 no.1
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    • pp.19-27
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    • 2014
  • This paper studied the materials of the furniture which the noble men used in Goryeo, based on the furniture material category of solid wood furniture, lacquerware inlaid with mother-of-pearl and hardware. As for the solid wood furniture, the wood and furniture types are inferred based on the documents. The trees used for the wood furniture were zelkova, korean willow, pine, royal paulownia, maidenhair tree, korean pine, chinese juniper and elm. The furniture types were table, chair, wooden bench, small portable table, writing table, and folding screen. As to the types of lacquerware inlaid with mother-of-pearl, most of them were hams with top, which were made of abalone shells. The features of the lacquerware inlaid with mother-of-pearl were in detail and elaborate like the pattern of the full bloomed chrysanthemum. Writing tables were also made of lacquerware as pieces of furniture. Distinctively, the mother-of-pearl furniture material was popular enough to be used even in a horse saddle. Regarding the metal feldspar used as both a practical use and decoration, there are drop handle, hinge, the front basis, and lock seen in the artifacts, which were made of cast iron, bronze, and brass. Their manufacture techniques were eojamoon, bratticing and sheet metal. Through this study of the furniture materials used in Goryeo, it seems that Goryeo furniture focused on the functions rather than on the decorations, and in turn the forms were simple and basic. The technique of mother-of-pearl, a bit elaborate one, was used in the props furniture like kitchen wares, hams, or writing talbes. Probably, the solid wood is inferred to be used in a low wooden bench, a chair, and a table based on the documents.

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Identification of Linear and Nonlinear Dynamic Stability Characteristics of a Medium-size High-speed Turbocharger Rotor Supported by 3-lobe Bearings (3-로브 베어링으로 지지된 중형 고속 터보차저 로터의 선형 및 비선형 동적 안정성 특성 규명)

  • Lee, An-Sung;Kim, Byung-Ok
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.21 no.6
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    • pp.562-569
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    • 2011
  • In this study linear and nonlinear dynamic stability characteristics of a medium-size high-speed turbocharger, whose rotor is supported by two 3-lobe journal bearings, are analyzed to evaluate and identify the effects of its bearing design variables. The rotor has the rated speed of 40,500 rpm and maximum continuous speed of 45,000 rpm. At first, utilizing the linear stability analysis method, bearing designs of yielding stable or unstable LogDecs as small as possible are searched by manipulating with machined bearing clearances and preloads. As next, utilizing the nonlinear analysis method, limit cycles of the rotor responses at the rated and maximum continuous speeds are simulated to check their acceptances. Results have shown that for the turbocharger rotor-bearing system considered, the 3-lobe journal bearing design with a smaller machined clearance and a larger preload are preferred for the stable rotor responses. More importantly, since there exists a good correlation between the linear and nonlinear stability analysis results, it is concluded that firstly the linear stability analysis method may be applied to screen quickly the ranges of bearing designs for stable or least unstable solutions and then, lastly the nonlinear stability analysis method may be deployed to check an absolute motion stability in terms of the limit cycle.