• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.8
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• pp.1380-1385
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• 2006

A Pipelined Tone Wakeup(PTW) scheme(1) was proposed to support energy saving and end-to-end delay for sensor networks by providing an asynchronous wakeup pipeline to overlap the wakeup procedures with the packet transmission. But the scheme uses two radios and assumes error-free environments. In this paper, we propose a modified PTW scheme for wireless sensor networks. The proposed scheme is based on the PTW. The difference is that next hop information will be included in the ack packet from receiver node to sender node, So all the other neighbor nodes can stay in sleep mode long enough to save energy. Also ore get enhanced delay performance.

• Food Science of Animal Resources
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• v.35 no.5
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• pp.703-706
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• 2015

The interaction of plasma with liquid generates nitrogen species including nitrite (NO⁻₂). Therefore, the color developing capacity of plasma-treated water (PTW) as a nitrite source for meat curing was investigated in this study. PTW, which is generated by surface dielectric barrier discharge in air, and the increase of plasma treatment time resulted in increase of nitrite concentration in PTW. The PTW used in this study contains 46 ppm nitrite after plasma treatment for 30 min. To evaluate the effect of PTW on the cured meat color, meat batters were prepared under three different conditions (control, non-cured meat batter; PTW, meat batter cured with PTW; Sodium nitrite, meat batter cured with sodium nitrite). The meat batters were vacuum-packaged and cooked in a water-bath at 80℃ for 30 min. The typical color of cured meat developed in cooked meat batter treated with sodium nitrite or PTW. The lightness (L*) and yellowness (b*) values were similar in all conditions, whereas, the redness (a*) values of cooked meat batter with PTW and sodium nitrite (p<0.05) were significantly higher than the control. These data indicate that PTW can be used as a nitrite source in the curing process of meat without addition of other nitrite sources.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.15 no.2
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• pp.80-86
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• 2001

This paper describes the harmonic analysis method of industrial power systems using PTW(Power Tools for Window). Voltage/current distortion levels and filter at steady state are calculated by harmonic load flow. Special features of its input processes PTW is utilized in order to facilitate creation of new simulation cares. Harmonics at transient state, the filter and the load variation, are analysed to diagnosis the power quality in actual industrial plant model.

• Food Science and Biotechnology
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• v.18 no.1
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• pp.84-88
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• 2009

Cathepsin S is a cysteine protease that affects extracellular matrix remodeling. Recently, several studies have reported that cathepsin S is involved in obesity. Both mouse and human adipose cells produce this enzyme in the early phase of adipocyte differentiation, where it degrades fibronectin. Cathepsin S gene expression is elevated in the adipose tissue of obese mice as compared to that of lean mice. Paecilomyces tenuipes water extracts (PTW) are shown to have an inhibitory effect on cathepsin S activity. In this study, Z-Val-Val-Arg-MCA was used as a cathepsin S-specific substrate in order to examine inhibitory effect of PTW. Supplementing 3T3-L1 cell media with PTW clearly reduced lipid droplet accumulation and cathepsin S-induced adipogenesis. Furthermore, PTW decreased weight gain, subcutaneous adipose tissue growth, the level of serum triglyceride, and total cholesterol in mice fed a high-fat diet. These data suggest that PTW work against adipose cathepsin S and presumably contribute to anti-obese activities.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.14 no.3
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• pp.22-28
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• 2000

In this paper PTW(Power Tools for Windows) application method for analysis the industrial distribution system is proposed. T&D(Transmission and Distribution) and BICC methods is applied for the cable impedance and the X/R of transformer data is estimated by IEEE standard. The effectiveness of this method was improved by the electrical characteristics analysis of the real industrial distribution system.

• Safety and Health at Work
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• v.7 no.1
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• pp.6-11
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• 2016

Background: A permit to work (PTW) is a formal written system to control certain types of work which are identified as potentially hazardous. However, human error in PTW processes can lead to an accident. Methods: This cross-sectional, descriptive study was conducted to estimate the probability of human errors in PTWprocesses in a chemical plant in Iran. In the first stage, through interviewing the personnel and studying the procedure in the plant, the PTW process was analyzed using the hierarchical task analysis technique. In doing so, PTWwas considered as a goal and detailed tasks to achieve the goal were analyzed. In the next step, the standardized plant analysis risk-human (SPAR-H) reliability analysis method was applied for estimation of human error probability. Results: The mean probability of human error in the PTW system was estimated to be 0.11. The highest probability of human error in the PTW process was related to flammable gas testing (50.7%). Conclusion: The SPAR-H method applied in this study could analyze and quantify the potential human errors and extract the required measures for reducing the error probabilities in PTW system. Some suggestions to reduce the likelihood of errors, especially in the field of modifying the performance shaping factors and dependencies among tasks are provided.

• Proceedings of the KIEE Conference
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• 2000.07a
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• pp.249-251
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• 2000

This paper describes how computer simulations can be used to predict harmonic problems before they occur, and evaluate corrective alternatives prior to implementation PTW(Power Tools for Windows) is used for simulations to the real model system. Harmonic load flow studies, voltage/current distortion levels, harmonic frequency scans and filter selection method are analysed through detailed power system simulation.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2009.10a
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• pp.190-193
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• 2009

A recently reported simple phenomenological constitutive model (SK) demonstrated comparable or better data description capability to/than one of the rigorous and physics-based models, the PTW model. The simple SK model is believed to be an efficient model for practical applications where an extensive computation is needed, and can serve as a rigorous comparison standard for the development of a physics-based model.

• Progress in Medical Physics
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• v.24 no.3
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• pp.140-144
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• 2013

In this research, the glass dosimeter was calibrated to measure the standard absorbed dose of the Cs-137 irradiator and absorbed dose in a biological sample. Absorbed dose in water for Cs-137 gamma ray was determined by the IAEA TRS-277 protocol. The PTW-TM30013 ion chamber and the PTW-TM41023 water phantom were utilized for measuring absorbed dose and the value was compared with the reading from DoseAce GD-302M glass dosimeter from Asahi Techno Glass Corporation for its calibration. The uncertainty of measurement ($1{\sigma}$) of the calibrated glass dosimeter was 2.7% and this result would be applied to improve the accuracy in measurement of absorbed dose in a biological sample.

• Journal of the Society of Disaster Information
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• v.14 no.4
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• pp.440-449
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• 2018

Purpose: This study aims to design and verify an onsite EEWS that extracts the P-wave from a single seismic station and deduce the PGV. Method: The P-wave properties of Pd, Pv, and Pa were calculated by using 12 seismic waveform data extracted from historic seismic records in Korea, and the PGVs were computed using empirical equation on the P properties - PGV relationship and compared with the observed values. Results: Comparison of the observed and estimated PGVs within the alarm level shows the error rate of 86.7% as minimum. By reducing the PTW to 2 seconds, the alarm time can be shortened by 1 second and the seismic blind zone near the epicenter can be shortened by 6 Km. Conclusion: Through this study, we confirmed the availability of the on-site EEWS in Korea. For practical use, it is necessary to develop regression formula and algorithm reflect local effect in Korea by increasing the number of seismic waveform data through continuous observation, and to eliminate the noise from the site.