• Title, Summary, Keyword: application time

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Application-Adaptive Performance Improvement in Mobile Systems by Using Persistent Memory

  • Bahn, Hyokyung
    • International journal of advanced smart convergence
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    • v.8 no.1
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    • pp.9-17
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    • 2019
  • In this article, we present a performance enhancement scheme for mobile applications by adopting persistent memory. The proposed scheme supports the deadline guarantee of real-time applications like a video player, and also provides reasonable performances for non-real-time applications. To do so, we analyze the program execution path of mobile software platforms and find two sources of unpredictable time delays that make the deadline-guarantee of real-time applications difficult. The first is the irregular activation of garbage collection in flash storage and the second is the blocking and time-slice based scheduling used in mobile platforms. We resolve these two issues by adopting high performance persistent memory as the storage of real-time applications. By maintaining real-time applications and their data in persistent memory, I/O latency can become predictable because persistent memory does not need garbage collection. Also, we present a new scheduler that exclusively allocates a processor core to a real-time application. Although processor cycles can be wasted while a real-time application performs I/O, we depict that the processor utilization is not degraded significantly due to the acceleration of I/O by adopting persistent memory. Simulation experiments show that the proposed scheme improves the deadline misses of real-time applications by 90% in comparison with the legacy I/O scheme used in mobile systems.

Acceleration Techniques of Application Startup for Embedded Systems (임베디드 환경에서 응용프로그램 시작의 가속 기법)

  • Park, Eun-Byung;Lee, Yong-Jun;Kim, Seungkyun;Lee, Jaejin;Park, Kyungmin
    • IEMEK Journal of Embedded Systems and Applications
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    • v.4 no.4
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    • pp.174-179
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    • 2009
  • Due to digital convergence, mobile embedded systems need more functionalities and a fully fledged OS. Applications for such embedded systems are linked with many shared libraries available in the OS and access a large data set at launch time. This results in increased application launch time. In this paper, we propose two techniques for reducing the application launch time: lazy-loading and pinning. Lazy-loading defers loading shared libraries that are not used in the application at launch time, whereas pinning guarantees the residence of shared libraries and data used at launch time in the main memory.

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Effect of Application Time and Amount of Liquid Pig Manure on Growth of Rice and Infiltration Water Quality (벼에 대한 돈분뇨 액비의 시용량 및 시용시기 구명)

  • Park, Baeg-Kyun;Lee, Jong-Sik;Cho, Nam-Jun;Jung, Kwang-Yong
    • Korean Journal of Soil Science and Fertilizer
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    • v.34 no.3
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    • pp.147-152
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    • 2001
  • This study was carried out to investigate the effect of application time and amount of liquid pig manure on growth and yield of rice plant and infiltration water quality. Liquid manure treatment with higher application rate and closer application time to transplanting time showed higher plant height and number of tiller at panicle formation stage, but it caused the plant disease and pest and lodging. In liquid manure treatment with higher application rate, number of panicles per hill and number of spikelets per panicle were higher but yield of rice was less than chemical fertilizer treatment due to low rate of ripeness and 1,000 grain weight. $NO_3-N$ concentration in infiltration water sample was increased with increasing application amount of liquid manure and closer application time to transplanting of rice plant. With consideration yield of rice and environment such as groundwater quality, the proper application amount were 150% and 100% of recommending N fertilizer level (11kg) at before winter and April or May treatment, respectively.

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Towards Performance-Enhancing Programming for Android Application Development

  • Kim, Dong Kwan
    • International Journal of Contents
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    • v.13 no.4
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    • pp.39-46
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    • 2017
  • Due to resource constraints, most of Android application developers need to address potential performance problems during application development and maintenance. The coding styles and patterns of Android programming could often affect the execution time and energy efficiency which are utilized by the Android applications. Thus, it is necessary for application developers to apply performance-enhancing programming practices for mobile application development. This paper introduces performance-enhancing best practices for Android programming, and further, it evaluates the impact of these practices on the CPU time of the application. The original version with the performance-worsening code has been refactored to become an efficient version without changing its functionality. To demonstrate the efficiency of the proposed approach, each coding pattern was evaluated by measuring the CPU time under the controlled runtime environment. Furthermore, the Android applications were evaluated and compared via the CPU time of the original version, with that of the refactored version. These experimental results indicate that, by -using the proposed programming practices, the Android developer can develop performance-efficient mobile applications.

Effect of Nitrogen Split Application on Growth and Quality of Okro Tea Leaves(Camellia sinensis var. sinensis) (질소 분시횟수가 옥로차엽의 생육과 품질에 미치는 영향)

  • Lim, Keun-Cheol;Park, Jang-Hyun
    • Korean Journal of Medicinal Crop Science
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    • v.9 no.1
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    • pp.33-39
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    • 2001
  • The split application of a nitrogen fertilizer was applied at the levels to 3, 4, 5, 6 and 7 time. The results of yield and quality of Okro tea are summarized as follows: Among five treatments, the growth and yield were somewhat more excellent in the five time split treatments compared with other treatments. The chemical components such as total nitrogen, total amino acid and vitamin C were somewhat higher in the five time split treatment compared with other treatment. However, the content of components such as tannin, caffeine, chlorophyll were not different among plots of $4{\sim}7$ time split application except three time split application manuring. The content of fatty acid was producted $2,888{\sim}2,933mg/100g$. Especially, the content of oleic acid, linoleic acid and linolenic acid was the higheat in the five time split application. Sixteen kinds of free amino acid including theanine as a good taste component of Okro tea were isolated and measured by HPLC. Theanine in the five time split application was higher with value of $72{\sim}513mg/100g$ than in other treatment. In scoring test, tea appearance and interal qualities of 3 time split application become lower than any other treatment as 80.2 point, while five time application had the highest with 84.7 point. Conquently, those results meant that five time split application was optimum split application of fertilizer for high yield and good quality of Okro tea.

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A Study on Building Web Services for Implementing Real Time Enterprise

  • Lee, Jung-Min
    • 한국경영정보학회:학술대회논문집
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    • pp.377-382
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    • 2007
  • To transform the enterprise system into the 'Real Time Enterprise' with respect to IT, I suggest the conceptual application model which is composed of pieces(components) extracted from different packaged applications working in a heterogeneous environment based on the 'business activity' in other words, business services provided by internal (inter-enterprise) and external (extended enterprise) application to support a business activity within in an enterprise and the design mechanism focusing service tier which acts as intermediate tier within application architecture.

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Influence of Current Density Application Time on the Corrosion Damage of Offshore Wind Steel Substructure in Galvanostatic Corrosion Experiment (해상풍력 하부 구조물용 강재의 정전류 부식 시험 시 전류밀도 인가 시간이 부식손상에 미치는 영향)

  • Lee, Jung-Hyung;Park, Jae-Cheul;Han, Min-Su;Jang, Seok-Ki;Kim, Seong-Jong
    • Journal of the Korean institute of surface engineering
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    • v.49 no.5
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    • pp.431-438
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    • 2016
  • This research investigated the relationship between the corrosion damage characteristics of offshore wind steel substructure and the time of current density application by electrochemical accelerated short-term corrosion test. The galvanostatic corrosion was conducted on the steel specimens in natural seawater with a constant current density ranging from $1mA/cm^2$ to $200mA/cm^2$ for 1 ~ 180 min. Macro and micro observation was carried out on the surface of the corrosion damaged area using SEM and 3-dimensional analysis microscope. The weight loss of the specimens before and after was calculated as the difference between the initial weight prior to corrosion and weight after removal of the corrosion product. It was shown that during galvanostaic corrosion process, the corrosion behavior could be characterized by the onset of pitting corrosion in the early stage and the uniform corrosion in the late stage, showing damage development in the depth direction with the time of current application. The result of the 3D analysis revealed that both damage depth and surface roughness increased with increasing time of current application. The weight loss curves with time showed that a coefficient of determination ($R^2$) was relatively high for the relationship between the time of current application and weight loss. As a result, the degree of corrosion can be controlled by simply varying the time of current application.

ASSESSMENT OF THE INFLUENCE OF APPLICATION TIME OF DIFFERENT APF AGENTS ON THE ENAMEL FLUORIDE UPTAKE AND ANTICARIOGENICITY (서로다른 APF 제재의 적용시간에 따른 법랑질내 불소 흡수량 및 우식 억제효과에 관한 비교 연구)

  • Kwon, Soon-Won;Kim, Yong-Kee
    • THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY
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    • v.23 no.2
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    • pp.306-326
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    • 1996
  • The purpose of this study was to compare the enamel fluoride uptake and anticariogenic effect following topical application with different physical form of fluoride and application time. The results can be summarized as follows: 1. While the 4-minute applicaton increased the enamel fluoride uptake significantly than 1-minute application regardless of physical form of applied topical fluoride agents, no siginificant difference could be found between foam and gel type when applied for the identical period of time. 2. The application time or the physical form of topical agents had no singificant influence on the reduction of caries lesion. 3. Based upon the above-mentioned results of this study, it cannot be concluded that the amount of enamel fluoride uptake has an absolute impact on the change of lesion depth. Therefore, the clinical application of 1-minute topical fluoride application which appears to have a similar anticariogenic efficacy to 4-minute fluoride application may be encouraged.

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Effect of Lime Amount and Application Time on Soil pH Change, Yield, and Quality of Leaf Tobacco (석회시용량과 시용시기가 경작지 토양산도 변화와 잎담배 수량 및 품질에 미치는 영향)

  • 정훈채;김용연;황건중
    • Journal of the Korean Society of Tobacco Science
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    • v.22 no.1
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    • pp.61-70
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    • 2000
  • This study was carried out to improve the tobacco field condition and to determine the effect of lime amount and application time on soil pH, yield, and quality of leaf tobacco. Lime was applied to the tobacco field by determined amounts according to different pH level. The changes of soil pH, growth of tobacco, yield, and quality of KF109 and Br21 tobacco were surveyed by time lapse. The target pH value in tobacco field soil can be reached at 6 weeks after lime application, and then the soil pH was lowered slightly after that time. The lime amount needed to reach target pH was decreased 40 % in the same tobacco field after 1 year. Though the initial growth rate of flue-cured tobacco in the field of pH 7.0 was lower than that of conventional tobacco field, the field of pH 7.0 showed the highest yield after the maximum growth stage. The quality of cured leaf tobacco in the field of pH 7.0 applied lime at spring season was slightly lowered compared with that in conventional. This results indicated that the best pH condition in tobacco field for the best tobacco growth was 6.5 and the proper time of lime application was fall season of previous year by application of the whole quantity.

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A Study about Change in the Temperature by Each Region and Time After Hot & Cold Application (온.냉적용시 신체부위별 및 시간에 따른 체온변화에 대한 연구)

  • Kim, Keun-Jo;Lee, Cu-Ri
    • Journal of Korean Physical Therapy Science
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    • v.2 no.3
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    • pp.577-586
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    • 1995
  • This paper was the study of a change in the body temperature of each region(Oral cavity, Axillary, Cubital, Popliteal, Inguinal region)and by time after appling hot(Hot Pack, Infra Red) and cold (Ice Pack, Cooling Pack) to lumbar region. The statistical measures were sampled through 16 senior students in dept. of Physiothrapy, Kim Cheun College and the period for this was from July 13, 1995 to July 20, 1995. There was an increse in the temperature of distal portion besides application area after hot application. The increse in the body temperature according to applied agents and time showed significance statistically(p<0.01, p<0.05). There was just a decrease in the temperature of distal portions besides application area after appling Ice Pack. Furthermore there was an increase in the body temperature after appling Cooling Towel. Therefore, during cold application the appling agents and time did not showed any significance statistically.

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