• Title/Summary/Keyword: Mass Memory

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Development and Test of KOMPSAT-2 MMD S/W (다목적실용위성 2호 대용량 메모리 및 지상송신관리 소프트웨어 개발 및 시험)

  • Chae, Dong-Seok;Lee, Jae-Seung;Choi, Jong-Wook;Kang, Soo-Yeon;Lee, Jong-In;Choi, Eun-Jung;Park, Suk-June
    • Proceedings of the Korea Information Processing Society Conference
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    • 2004.05a
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    • pp.1533-1536
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    • 2004
  • 위성의 비행소프트웨어는 위성이 주어진 임무를 수행할 수 있도록 위성을 제어하는 것으로 지상으로부터의 원격 명령을 받아 처리하고 원격측정 데이터를 지상으로 송신하는 기능과 자세 결정 및 제어, 전력 제어, 열 제어, 탑재체 관리 등의 기능을 수행한다. 본 논문은 다목적실용위성 2호의 비행소프트웨어에서 원격측정 데이터를 저장하고 지상으로 전송하는 기능을 수행하는 MMD (Mass Memory and Downlink Management) 소프트웨어의 설계 및 구현 내용과 시험절차, 방법, 시험결과 등에 대해서 서술하였다.

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Temperature effect on seismic behavior of transmission tower-line system equipped with SMA-TMD

  • Tian, Li;Liu, Juncai;Qiu, Canxing;Rong, Kunjie
    • Smart Structures and Systems
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    • v.24 no.1
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    • pp.1-14
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    • 2019
  • Transmission tower-line system is one of most critical lifeline systems to cities. However, it is found that the transmission tower-line system is prone to be damaged by earthquakes in past decades. To mitigate seismic demands, this study introduces a tuned-mass damper (TMD) using superelastic shape memory alloy (SMA) spring for the system. In addition, considering the dynamic characteristics of both tower-line system and SMA are affected by temperature change. Particular attention is paid on the effect of temperature variation on seismic behavior. In doing so, the SMA-TMD is installed into the system, and its properties are optimized through parametric analyses. The considered temperature range is from -40 to $40^{\circ}C$. The seismic control effect of using SMA-TMD is investigated under the considered temperatures. Interested seismic performance indices include peak displacement and peak acceleration at the tower top and the height-wise deformation. Parametric analyses on seismic intensity and frequency ratio were carried out as well. This study indicates that the nonlinear behavior of SMA-TMD is critical to the control effect, and proper tuning before application is advisable. Seismic demand mitigation is always achieved in this wide temperature range, and the control effect is increased at high temperatures.

Effects of Ethanol on Neurobehavioral Performance (컴퓨터를 이용한 에탄올에 의한 신경행동기능 장애 평가)

  • Jeon, Man-Joong;SaKong, Joon;Kang, Pock-Soo;Kim, Moon-Chan;Kim, Hak-Soo
    • Journal of Yeungnam Medical Science
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    • v.14 no.1
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    • pp.183-196
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    • 1997
  • An experimental study was performed to investigate. The subjects drank (0.5g/kg ethanol and performed 7 items of SPES(simple reaction time, color word stress, digit classification, finger tapping speed, numerical ability, symbol digit coding, memory digit span). 20 students of medical college participated in the study during August, 1996. After ethanol intake, performance of 4 items(simple reaction time, digit classification, finger tapping speed, symbol digit coding) significantly showed to be decreased. The function of perception-response speed and steady movement were found to be more sensitive to ethanol than that of short-term memory, numerical ability and specification of color. No significant association were found between smoking, alcohol drinking, BMI(body mass index) and the effects of ethanol on neurobehavioral performance.

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The Effect of New Product Preannouncing Convergence Strategy on Attitude and Judgement Using Facebook Brand Fan Page (페이스북 브랜드 팬 페이지를 활용한 신제품 프리어나운싱 융합전략이 태도와 판단에 미치는 효과)

  • Han, Kwang-Seok;Cho, Jae-Hyun
    • Journal of the Korea Convergence Society
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    • v.8 no.3
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    • pp.163-168
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    • 2017
  • This study empirically examines the differences in attitude and memory effect according to the product knowledge (high knowledge / low knowledge) and temporal distance (near future / far future) in the new product preannouncing strategy of companies through Facebook Respectively. Experiments were conducted by inserting the experiment into a virtual web browser using Facebook 's actual brand fan page and then connecting the experiment to the experimental banner site. As a result of research, when preannouncing new products are released in the near future, low knowledge consumers have made judgments of purchasing decisions because GRM judgments are more favorable than property information (ARM) judgments, but preannouncing is a new product At the time of launch, highly-knowledgeable consumers had a positive effect on the property information (ARM) judgment of the product rather than the comprehensive information (GRM) judgment. In addition, when preannouncing was introduced in the near future, the attitudes of the products between the low-knowledge consumers and the high-knowledge consumers were all positive, but when the new products were launched in the distant future, Product attitude was negative.

Discovery and validation of PURA as a transcription target of 20(S)-protopanaxadiol: Implications for the treatment of cognitive dysfunction

  • Feiyan Chen;Wenjing Zhang;Shuyi Xu;Hantao Zhang;Lin Chen;Cuihua Chen;Zhu Zhu;Yunan Zhao
    • Journal of Ginseng Research
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    • v.47 no.5
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    • pp.662-671
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    • 2023
  • Background: 20(S)-protopanaxadiol (PPD), a ginsenoside metabolite, has prominent benefits for the central nervous system, especially in improving learning and memory. However, its transcriptional targets in brain tissue remain unknown. Methods: In this study, we first used mass spectrometry-based drug affinity responsive target stability (DARTS) to identify the potential proteins of ginsenosides and intersected them with the transcription factor library. Second, the transcription factor PURA was confirmed as a target of PPD by biolayer interferometry (BLI) and molecular docking. Next, the effect of PPD on the transcriptional levels of target genes of PURA in brain tissues was determined by qRT-PCR. Finally, bioinformatics analysis was used to analyze the potential biological features of these target proteins. Results: The results showed three overlapping transcription factors between the proteomics of DARTS and transcription factor library. BLI analysis further showed that PPD had a higher direct interaction with PURA than parent ginsenosides. Subsequently, BLI kinetic analysis, molecular docking, and mutations in key amino acids of PURA indicated that PPD specifically bound to PURA. The results of qRT-PCR showed that PPD could increase the transcription levels of PURA target genes in brain. Finally, bioinformatics analysis showed that these target proteins were involved in learning and memory function. Conclusion: The above-mentioned findings indicate that PURA is a transcription target of PPD in brain, and PPD upregulate the transcription levels of target genes related to cognitive dysfunction by binding PURA, which could provide a chemical and biological basis for the study of treating cognitive impairment by targeting PURA.

Fabrication of Electrospun PAN/FA Nanocomposites and Their Adsorption Effects for Reducing Volatile Organic Compounds (전기방사에 의한 PAN/FA 나노 복합재의 제조 및 휘발성 유기 화합물에 대한 흡착효과)

  • Ge, Jun Cong;Wang, Zi Jian;Yoon, Sam Ki;Choi, Nag Jung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.6
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    • pp.702-708
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    • 2018
  • Volatile organic compounds (VOCs), as a significant air pollutant, is generated mainly from the burning of fossil fuels, building materials using painting, etc. The inhalation of a certain amount of VOCs can be deleterious to human health, e.g., headaches, nausea and vomiting. In addition, it can also cause memory loss and even increase the rate of leukemia. Therefore, as one of the methods for reducing VOCs in air, polyacrylonitrile/fly ash (PAN/FA) composite nanofibrous membranes were fabricated by electrospinning. To observe their VOCs adsorption capacity, the morphological structure of PAN/FA nanofibrous mats was investigated by field emission scanning electron microscopy (FE-SEM), and the VOCs (chloroform, benzene, toluene, and xylene) adsorption capacity of PAN/FA membranes were tested by gas chromatography/mass spectrometry (GC/MS). The results indicated that the PAN nanofiber containing 40 wt. % FA powder had the smallest fiber diameter of 283 nm; they also showed the highest VOCs adsorption capacity compared to other composite membranes.

Investigation on Influencing Environmental Factors on Health Status of Korean Septuagenarians Dwelling in Longevity Region in Jeonla Province (전라도 농촌장수지역 거주 70대 노인의 건강상태에 영향을 미치는 환경적 요인에 대한 탐색 연구)

  • Kwak, Chung Shil;Yon, Miyong;Lee, Mee Sook;Oh, Se In;Park, Sang Chul
    • Korean Journal of Community Nutrition
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    • v.19 no.2
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    • pp.142-162
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    • 2014
  • Objectives: To evaluate the critical environmental factors on healthy-aging of Korean people, we investigated the significant factors influencing health status of septuagenarians living in rural area of Jeonla province, known to be one of the representative longevity regions in Korea. Methods: We divided subjects into healthy group (36M/25F) or poor-health group (26M/73F) based on self-reported health status, body mass index, a number of prescription, and blood test data. General characteristics, physical measurements, lifestyle, dietary behavior and nutrient intake, physical health and mental health data were statistically compared between the two groups. Results: Average age was not different between healthy group and poor-health group in men and women, respectively. In men, significantly favorable factors to health were observed to be higher education, regular exercise, higher grip strength and walking function, body mass index (${\geq}18.5kg/m^2$), moderate frequency of drinking and eating-out, non-smoking, normal red blood cell (RBC) count, higher serum dehydroepiandrosterone-sulfate (DHEAS) level, good digestive function and appetite, normal hearing function, regular meals, adequate vegetable and fruit intake, diverse food intake, adequate energy and nutrients (protein, vitamin $B_1$, $B_6$, C and E, folate, niacin, P, Zn and K) intake, higher mini-nutrient status assessment (MNA) score and low level of depression. On the other hand, in women, those were literacy, living arrangement, moderate frequency of drinking, healthy teeth, higher grip strength and walking function, bone mineral density, normal RBC and white blood cell (WBC) count, higher DHEAS concentration, higher MNA score, normal cognition and memory function, having snack and adequate fruit intake. Conclusions: These results could be useful to plan effective strategies to increase health-life expectancy of Korean old people living in rural areas.

Real-Time Terrain Visualization with Hierarchical Structure (실시간 시각화를 위한 계층 구조 구축 기법 개발)

  • Park, Chan Su;Suh, Yong Cheol
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.29 no.2D
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    • pp.311-318
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    • 2009
  • Interactive terrain visualization is an important research area with applications in GIS, games, virtual reality, scientific visualization and flight simulators, besides having military use. This is a complex and challenging problem considering that some applications require precise visualizations of huge data sets at real-time rates. In general, the size of data sets makes rendering at real-time difficult since the terrain data cannot fit entirely in memory. In this paper, we suggest the effective Real-time LOD(level-of-detail) algorithm for displaying the huge terrain data and processing mass geometry. We used a hierarchy structure with $4{\times}4$ and $2{\times}2$ tiles for real-time rendering of mass volume DEM which acquired from Digital map, LiDAR, DTM and DSM. Moreover, texture mapping is performed to visualize realistically while displaying height data of normalized Giga Byte level with user oriented terrain information and creating hill shade map using height data to hierarchy tile structure of file type. Large volume of terrain data was transformed to LOD data for real time visualization. This paper show the new LOD algorithm for seamless visualization, high quality, minimize the data loss and maximize the frame speed.

BIOFIT - Smart, Portable, Wearable and Wireless Digital Exercise Trainer Device with Biofeedback Capability

  • Diwakar Praveen Kumar;Oh Young-Keun;Chung Gyo-Bum;Park Seung-Hun
    • Journal of Biomedical Engineering Research
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    • v.28 no.1
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    • pp.36-45
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    • 2007
  • Today Human Personal Trainers are becoming very famous in this health conscious world. They teach user to achieve fitness goals in managed way. Due to their high fee and tight schedule they are unavailable to mass number of people. Another solution to this problem is to develop digital personal trainer portable instrument that may replace human personal trainers. We developed a portable digital exercise trainer device - BIOFIT that manages, monitors and records the user's physical status and workout during exercise session. It guides the user to exercise efficiently for specific fitness goal. It keeps the full exercise program i.e. exercises start date and time, duration, mode, control parameter, intensity in its memory which helps the user in managing his exercise. Exercise program can be downloaded from the internet. During exercise it continuously monitors the user's physiological parameters: heart rate, number of steps walked, and energy consumed. If these parameters do not range within prescribed target zone, the BIOFIT will alarm the user as a feedback to control exercise. The BIOFIT displays these parameters on graphic LCD. During exercise it continuously records the heart rate and number of steps walked every 10 seconds along with exercise date and time. This stored information can be used as treatment for the user by an exercise expert. Real-time ECG monitoring can be viewed wirelessly (RF Communication) on a remote PC.

The design and performance analysis of RS(255,223) code for X-band downlink of STSAT-3 (과학기술위성3호의 X-대역 하향링크를 위한 RS(255,223) 코드 설계 및 성능 분석)

  • Seo, In-Ho;Kim, Byung-Jun;Lee, Jong-Ju;Kwak, Seong-Woo
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.2
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    • pp.195-199
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    • 2010
  • (255,223) RS(Reed-Solomon) code which is the CCSDS(Consultative Committee for Space Data Systems) standard was used in the STSAT-3 to correct errors during the downlink of payload data. The RS encoder developed by VHDL was implemented in MMU(Mass Memory Unit). Moreover, the RS decoder developed by C-language was implemented in the DRS(Data Receiving System) of ground station. In this paper, we reported the design and analysis results of RS(255,223) for STSAT-3. The BER(Bit Error Rate) performance from MMU to DRS was confirmed through the downlink test at 16 Mbps. Also, the error correction performance and capability of RS(255,223) was tested by the manual attenuation of the RF(Radio Frequency) signal in the X-band transmitter resulting in putting some errors in the communication line.