202 research outputs found
TSB: A DVS algorithm with quick response for general purpose operating systems
No full textDVS is becoming an essential feature of state-of-the-art mobile processors. Interval-based DVS algorithms are widely employed in general purpose operating systems thanks to their simplicity and transparency. Such algorithms have a few problems, however, such as delayed response, prediction inaccuracies, and underestimation of the performance demand. In this paper we propose TSB (time slice based), a new DVS algorithm that takes advantage of the high transition speeds available in state-of-the-art processors. TSB adjusts processor performance at every context switch in order to match the performance demand of the next scheduled task. The performance demand of a task is predicted by analyzing its usage pattern in the previous time slice. TSB was evaluated and compared to other interval-based power management algorithms on the Linux kernel. The results show that TSB achieved similar or better energy efficiency compared to existing interval-based algorithms. In addition, TSB dramatically reduced the side effect of prolonging short-term execution times. For a task requiring 50 ms to run without a DVS algorithm, TSB prolonged the execution time by only 6% compared to results of 136% for CPUSpeed and 20% for Ondemand.close51
Lean six sigma in a call centre : a case study
No full textThis paper, a case study, aims to illustrate the application of lean six sigma in a call centre of a service industry corporation. The study draws on process information and primary data from a real project. The study describes improvements in the operation of the call centre attributable to lean six sigma: increase in first-call resolution ratio, reduction in operator turnover and streamlining of processes. The introduction of lean six sigma into the call centre daily operations' management may have organizational benefits. Although lean six sigma has been extremely successful in the last two decades in the manufacturing sector, its applicability to the service sector has been a controversial topic. This study illustrates its application to a fast-growing area of the service sector, assisting companies in identifying areas of development for their call centres
Effect of Hanging White Bedsheet Around Phototherapy Unit on TSB Level in Neonatal Jaundice: A Comparative Study
No full textIntroduction: Phototherapy is the primary treatment for neonatal jaundice and is evaluated via total serum bilirubin
(TSB) level. Hanging white material around phototherapy unit can multiply energy delivery by many folds. This study
is to evaluate the effect of hanging white bedsheet around phototherapy unit on the reduction of TSB level. Methods:
Comparative interventional study was conducted in two public hospitals. 200 eligible neonates with hyperbilirubinemia were recruited and assigned to intervention (n=100) and control group (n=100). Neonates assigned into
intervention group were nursed under phototherapy with the addition of white bedsheet hanging around the unit
while the control group were nursed under phototherapy with non-white curtains. Results: Mothers’ blood group
(x = 3.75, p = .29), neonates’ blood group (x = 2.87, p = .41), birth weight (t = 1.41, p = .16), baseline total serum
bilirubin (TSB) level (p = .08), baseline irradiance of phototherapy prior to the hanging of curtains (p = .13) and hours
of phototherapy (p = .53). The mean for TSB level in intervention and control group at 24 hours was 235.82µmol/L
and 208.67µmol/L respectively. The mean difference in TSB level between intervention and control group was statistically significant at 24 hours (x = 27.15, t = 4.56, p < .001) and 48 hours (x = 19.27, t = 2.32, p = .02) after initiation of phototherapy. Conclusion: The baseline and demographic characteristics of the neonates and mothers were
comparable between the intervention and control group. The TSB level at 24 hours and 48 hours were significantly
lower in control group if compared to the intervention group. Therefore, hanging white bedsheet did not significantly
hasten the reduction of TSB level when compared to ordinary non-white curtains
Melipat Air: Jurus budaya pendekar Tionghoa: Lee Man Fong, Siaw Tik Kwie, Lim Wasim
No full textBuku ini semacam buku biografi yang disusun untuk mengingat keberadaan tiga tokoh budaya dan seni keturunan Tionghoa: Lee Man Fong, Siauw Tik Kwie, dan Lim Wasim. Ketiga tokoh tsb telah berjasa pada bangsa dan negara Indonesia. Meskipun mereka berkiprah dalam lingkungan seni rupa, jangkauan pikiran, kaki, dan tangannya melewati batas-batas profesinya. Mereka bertiga terkenal sebagai pelukis yang menjangkau wilayah keorganisasian, populer sebagai komikus, dan memiliki kontribusi tersembunyi bagi bangsa dan negara Indonesia
Improving the mechanical recycling and reuse of mixed plastics and polymer composites
No full textThis is a post-print version of the chapter.In this chapter we will explore the possibilities and viability of commercially recycling and reusing of composites and mixed polymer based waste that is difficult and expensive to separate into individual generic polymers for subsequent recycling. The chapter will also attempt to cover legislations that hinder and drive this technology and give sources of information for further examples of polymer recycling in action
Studies on the effect of Thiol broth to the inactivation of several antimicrobial agents
No full text치의학과/석사[한글]
혈액배양 양성율에는 혈액자체의 항균력 및 혈액에 들어간 항균제의 항균력 모두가 영향을 미친다. 혈액배양 양성율을 높이기 위한 하나의 방법으로 배지자체가 항균제를 불활화시킨다면 가장 이상적이라 하겠다. Thiol broth는 여러 항균제를 불활화한다고 보고되어 있으나 새로운 항균제의 불활화 효과나 Salmonella typhi나 S. paratyphi A증식에 대한 영향에 관한 연구는 적다.
이에 저자는 우리나라에서 균혈증의 주요 원인인 Salmonella typhi와 S. paratyphi A의 증식에 대한 영향을 검토하기 위하여 Thiol broth의 새로 이용되기 시작된 것을 포함한 9종류의 항균제에 대한 불활화 능력을 시험하였다. 또한 환자의 혈액배양에 Thiol broth
와 Trypic soy broth(TSB)를 쓰고 그 중 세균이 분리된 예에서 세균의 증식이 육안으로 관찰되기에 걸린 평균기간을 배지별로 비교하여 다음과 같은 결과를 얻었다.
1. 항균제가 들어있지 않은 배지의 비교에서 Thiol broth에서 시험세균의 증식은 TSB에서보다 불량하였다.
2. Penicillin 제제인 carbenicillin, piperacillin, 또는 ticarcillin이 16-128㎍/ml 들어있는 TSB에서는 시험세균이 증식하지 않았으나 Thiol broth에서는 증식하였다.
3. Cephalosporin제제 중 moxalactam이 4-16㎍/ml 들어있는 TSB에서는 시험세균이 증식하지 않았으나 Thiol broth에서는 증식하였다. cephalothin과 cefamandole이 첨가된 Thio
l broth에서 시험세균의 증식은 TSB에서보다 불량하였다.
4. Aminoglycoside 제제 중 gentamicin이 1-4㎍/ml 들어있는 TSB에서는 시험세균이 증식하지 않았지만 Thiol broth에서는 증식하였다. 그러나 tobramycin이 들어있는 TSB와 Thiol broth에서 시험세균의 증식은 비슷하였다.
5. Tetracycline 이 첨가된 Thiol broth에서 시험세균의 증식은 TSB에서보다 불량하였다.
6. 환자의 혈액배양에서 육안으로 세균의 증식이 관찰되기까지의 평균기간(mean ± SD)은 Thiol broth에서 2.42 ± 0.90일, TSB에서는 2.24 ± 0.80dlfdldjTek.
이상의 결과로 볼 때 Thiol broth는 carbenicillin, piperacillin, ticarcillin, moxalactam 및 gentamicin을 불활화시킬 수 있기 때문에 이러한 항균제가 투여된 환자의 혈액배양에는 TSB대신 Thiol broth를 사용하는 것이 유리할 것이라는 결론을 얻었다.
[영문]
Both the natural defensive power of blood and the antimicrobial agents if present will effect the positivity of blood cultures. In order to increase the rate of positive blood culture, it would be highly desirable to inactivate the antimicobial agents by culture media itself.
Thiol broth is one of those media, reported to be effective to inactivate several antimicrobial agents. However, none of these reports dealed with Salmonella typhi and Salmonella paratyphi A, which are the most common causative organisms of bacteremia in Korea. In this study, the author planned to evaluate the effectiveness of Thiol broth on the growth of S. typhi and S. paratyphi A under the presence of several antimicrobial agents. Some of the clinical trial of Thiol broth in routine blood culture was also included in this evaluation.
The following results were obtained.
1. When antimicrobial agent is not present in the test media, the growth of S. typhi and S. paratyphi A was worse in Thiol broth than in TSB.
2. S. Typhi and S. paratyphi A grew in Thiol broth despite of the presence of 16-128ug/ml of carbenicillin, piperacillin, or ticarcillin while these organisms did not grow in TSB with the same concentration of the antimicrobial agents.
3. S. typhi and S. paratyphi A grew in Thiol broth despite of the presence of 4-16ug/ml of moxalactam while these organisms did not grow in TSB with the same concentration of antimicrobial agents. In Thiol broth with cephalothin or cefamandole the growth of this organisms were worse than in TSB with the same antimicrobial agents.
4. S. typhi or s. paratyphi a grew in Thiol broth despite of the presence of gentamicin while these organisms did not grow in TSB with the same concentration of this antimicrobial agent. In the presence of tobramycin, no benificial effect was noted with Thiol broth.
5. The growth of s. typhi and S. paratyphi A were worse in Thiol broth than in TSB when tetracycline was present.
6. From the blood culture of patients, incubation time(mean ± SD) for detection of bacterial growth was 2.42 ± 0.90 day in Thiol broth and 2.24 ± 0.80 day in TSB.
It is concluded that Thiol broth inactivates carbenicillin, piperacillin, ticarcillin, moxalactam, and gentamicin. Therefore, the use of Thiol broth instead of TSB in blood culture of patients receiving such antimicrobial agents may result more positive cultures.restrictio
O wpływie społecznym bibliotek – recenzja książki Magdaleny Paul (Wpływ społeczny bibliotek publicznych. Badanie użytkowników bibliotek w województwie mazowieckim, Warszawa 2018)
No full textThe book written by Magdalena Paul addresses the problem of assessing the social impact of libraries. The author analyzes how users use public libraries and what is the outcome of the activities undertaken by these libraries. The author presents the results of research carried out in the Masovian Voivodeship.Książka Magdaleny Paul porusza problem oceny społecznego wpływu bibliotek. Autorka analizuje w jaki sposób użytkownicy korzystają z bibliotek publicznych oraz jakie są efekty działalności tychże bibliotek. Prezentuje wyniki badań zrealizowanych w województwie mazowieckim
Trust Service Broker: A proposal to overcome global distrust in information infrastructures
No full textThe globalization of economy has significantly increased the role of online information exchange between transacting parties worldwide. Currently implemented trust models, such as Public Key Infrastructure, provide enough means to enable the secure exchange of data, but only within specified territories, thereby forming different trust domains worldwide. Due to technical, organizational and political hindrances, an efficient universal trust model interconnecting different trust domains cannot be established by relying on one of the current archetypes of trust models. In this paper, we propose an Architecture based on an alternative, hybrid trust model in order to deal with the interoperability issues across different trust domains: the Trust Service Broker Architecture. We demonstrate the effectiveness of the TSB in a scenario related to international supply chain operations. We begin by describing a particular logistics case, more specifically an import trade lane from Malaysia to the Netherlands, as well as the issues associated with the information exchange between relevant stakeholders, which subsequently drive the requirements for the TSB architecture. Building on current knowledge, we then present a detailed overview of the TSB architecture and how it can facilitate safe and reliable information exchange for organizations involved in the logistics case. In order to do so, we also present a high level overview of the internal TSB security risks. Finally, we attempt to validate and generalize the TSB solution from a theoretical perspective, while also discussing the results and the implications for future research.Management of TechnologyICTTechnology, Policy and Managemen
Active flow control of a turbulent separation bubble through deep reinforcement learning
No full textThe control efficacy of classical periodic forcing and deep reinforcement learning (DRL) is assessed for a turbulent separation bubble (TSB) at Reτ=180 on the upstream region before separation occurs. The TSB can resemble a separation phenomenon naturally arising in wings, and a successful reduction of the TSB can have practical implications in the reduction of the aviation carbon footprint. We find that the classical zero-net-mas-flux (ZNMF) periodic control is able to reduce the TSB by 15.7%. On the other hand, the DRL-based control achieves 25.3% reduction and provides a smoother control strategy while also being ZNMF. To the best of our knowledge, the current test case is the highest Reynolds-number flow that has been successfully controlled using DRL to this date. In future work, these results will be scaled to well-resolved large-eddy simulation grids. Furthermore, we provide details of our open-source CFD–DRL framework suited for the next generation of exascale computing machines.Ship Hydromechanic
Growth and Virulence Properties of Biofilm-Forming <i>Salmonella</i> <i>enterica</i> Serovar Typhimurium under Different Acidic Conditions
No full textABSTRACT
This study was designed to characterize the viability and potential virulence of bofilm-forming
Salmonella
enterica
serovar Typhimurium under different pH levels, ranging from 5 to 7. The plate count method and real-time reverse transcription-PCR (RT-PCR) were used to evaluate the survival of
S.
Typhimurium grown in Trypticase soy broth (TSB) adjusted to pH 5, 6, and 7 (TSB-5, TSB-6, and TSB-7, respectively) at 37°C for 10 days. In TSB-5 and TSB-6, the numbers of viable cells estimated by using the real-time RT-PCR were greater than the culturable counts enumerated by the plate count method. Reflectance micro-Fourier transform infrared (micro-FTIR) spectroscopy was used to evaluate the biochemical changes in biofilm cells. Considerable changes in chemical components were observed in the biofilm cells grown in TSB-5 and TSB-6 when compared to the cells grown in TSB-7. The enterotoxin production and invasive ability of planktonic and biofilm
S.
Typhimurium cells were inferred by the relative levels of expression of
stn
and
invA
. The levels of expression of
stn
and
invA
were significantly increased in biofilm
S.
Typhimurium cells grown in TSB-5 (1.9-fold and 3.2-fold) and TSB-6 (2.1-fold and 22.3-fold) after 10 days of incubation. These results suggest that the biofilm-forming
S
. Typhimurium under different pH levels might change the virulence production and stress response mechanisms.
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