• 제목/요약/키워드: duration reduction

Search Result 709, Processing Time 0.027 seconds

An Experimental Study on Strength Properties of Early Strength Concrete for Reduction of Working Period in Apartment (공동주택 공기단축을 위해 개발된 조강 콘크리트의 강도 발현 특성에 관한 연구)

  • Jung, Yang-Hee;Lee, Jae-Hyun;Keum, Kyoung-Hun;Lee, Won-AM;Kim, Sun-Man
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2009.11a
    • /
    • pp.157-160
    • /
    • 2009
  • The decision of the Form removal time which leads the early assuring strength of the concrete from Apartment construction is the fact which is important from Reducing the period of works and the economical efficiency side. Especially, with Complex building of recent times the same Tall building and Multiple Apartment Site which only follows in upgrade of interior construction of apartment site and shortening the frame construction period becomes very, importantly is the actual condition where the effort which is various for this is attempted. But is caused by with limit and economical efficiency problem of case concrete early strength revelation of most and is not put to practical use is the actual condition. Develops concrete mixture which is a utility from the research which sees hereupon and the effect which is economic leads construction duration shortening under maximizing boil.

  • PDF

Analysis of Output Characteristics of High-Power Shingled Photovoltaic Module due to Temperature Reduction (고출력 슁글드 태양광 모듈의 온도 저감에 따른 출력 특성 분석)

  • Bae, Jae Sung;Yoo, Jang Won;Jee, Hong Sub;Lee, Jae Hyeong
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.33 no.6
    • /
    • pp.439-444
    • /
    • 2020
  • An increase in the temperature of photovoltaic (PV) modules causes reduced power output and shorter lifetime. Because of these characteristics, demands for the heat dissipation of PV modules are increasing. In this study, we attached a heat dissipation sheet to the back sheet of a shingled PV module and observed the temperature changes. The PV shingled module was tested under Standard Test Conditions (STCs; irradiance: 1,000 W/㎡, temperature: 25℃, air mass: 1.5) using a solar radiation tester, wherein the temperature of the PV module was measured by irradiating light for a certain duration. As a result, the temperature of the PV module with the heat dissipation sheet decreased by 3℃ compared to that without a heat dissipation sheet. This indicated that the power loss was caused by a temperature increase of the PV module. In addition, it was confirmed that the primary parameter contributing to the reduced PV module output power was the open circuit voltage (Voc).

Treatment of Calcinosis Cutis with Minocycline in Five Dogs

  • Cho, Dae-Hee;Lee, Wang-Hui;Park, Seong-Jun
    • Journal of Veterinary Clinics
    • /
    • v.34 no.2
    • /
    • pp.119-122
    • /
    • 2017
  • Calcinosis cutis is a chronic condition characterized by insoluble calcified deposits in the skin and subcutaneous tissue. Although there is no uniformly effective treatment for calcinosis cutis, minocycline therapy has demonstrated varying degrees of benefit in humans. Five client-owned dogs with calcinosis cutis were included. Minocycline was administered orally in a dose of 10 mg/kg bodyweight twice a day. Treatment was repeated every day until complete remission. The efficacy of minocycline was evaluated within this period. The side effects of minocycline were monitored and reported by the owners and veterinarians. Of the 5 dogs with calcinosis cutis, which was classified as the dystrophic form, four dogs had a complete remission of calcinosis cutis and one dog had a partial response. The major improvement was a reduction in the size of the calcified deposits and reduction in inflammation associated with them. The duration of remission was $9.1{\pm}2.2$ weeks. The adverse effects, observed in one dog, were anorexia and vomiting. Minocycline may be effective in the control of calcinosis cutis in dogs.

Determination of Incentive Level of Direct Load Control using Monte Carlo Simulation with Variance Reduction Technique (몬테카를로 시뮬레이션을 이용한 직접부하제어의 제어지원금 산정)

  • Jeong Yun Won;Park Jong Bae;Shin Joong Rin;Chae Myung Suk
    • Proceedings of the KIEE Conference
    • /
    • summer
    • /
    • pp.666-670
    • /
    • 2004
  • This paper presents a new approach for determining an accurate incentive levels of Direct Load Control (DLC) program using sequential Monte Carlo Simulation (MCS) techniques. The economic analysis of DLC resources needs to identify the hourly-by-hourly expected energy-not-served resulting from the random outage characteristics of generators as well as to reflect the availability and duration of DLC resources, which results the computational explosion. Therefore, the conventional methods are based on the scenario approaches to reduce the computation time as well as to avoid the complexity of economic studies. In this paper, we have developed a new technique based on the sequential MCS to evaluate the required expected load control amount in each hour and to decide the incentive level satisfying the economic constraints. And also the proposed approach has been considered multi-state as well as two-state of the generating units. In addition, we have applied the variance reduction technique to enhance the efficiency of the simulation. To show the efficiency and effectiveness of the suggested method the numerical studies have been performed for the modified IEEE reliability test system.

  • PDF

The Present and Future of Vagus Nerve Stimulation

  • Yang, Jeyul;Phi, Ji Hoon
    • Journal of Korean Neurosurgical Society
    • /
    • v.62 no.3
    • /
    • pp.344-352
    • /
    • 2019
  • Epilepsy is one of the major chronic neurological diseases affecting many patients. Resection surgery is the most effective therapy for medically intractable epilepsy, but it is not feasible in all patients. Vagus nerve stimulation (VNS) is an adjunctive neuromodulation therapy that was approved in 1997 for the alleviation of seizures; however, efforts to control epilepsy by stimulating the vagus nerve have been studied for over 100 years. Although its exact mechanism is still under investigation, VNS is thought to affect various brain areas. Hence, VNS has a wide indication for various intractable epileptic syndromes and epilepsy-related comorbidities. Moreover, recent studies have shown anti-inflammatory effects of VNS, and the indication is expanding beyond epilepsy to rheumatoid arthritis, chronic headaches, and depression. VNS yields a more than 50% reduction in seizures in approximately 60% of recipients, with an increase in reduction rates as the follow-up duration increases. The complication rate of VNS is 3-6%, and infection is the most important complication to consider. However, revision surgery was reported to be feasible and safe with appropriate measures. Recently, noninvasive VNS (nVNS) has been introduced, which can be performed transcutaneously without implantation surgery. Although more clinical trials are being conducted, nVNS can reduce the risk of infection and subsequent device failure. In conclusion, VNS has been demonstrated to be beneficial and effective in the treatment of epilepsy and various diseases, and more development is expected in the future.

A Study on The Natural Dyeing of Crataegi fructus Extracts (산사 추출물을 이용한 천연염색 연구)

  • Kim, Sangyool
    • Journal of Fashion Business
    • /
    • v.23 no.4
    • /
    • pp.100-111
    • /
    • 2019
  • In this study, the dyeing properties and functionalities of Crataegi fructus extract were investigated for the purpose of application to new natural dye resources. The effects of dyeing conditions(concentration of dye, dye bath temperature, dyeing duration and dye bath pH) and mordanting on dye uptake and color changes were also examined. The study also estimated the colorfastness, antibacterial properties, and ultraviolet protection properties of the dyed and mordanted silk fabrics. The dye uptake increased in tandem with the dye concentration and dye bath temperature. The highest K/S values were obtained at the following conditions: a dye concentration of 100%(v/v), a dyeing period of 60 minutes, a dye bath temperature of $90^{\circ}C$, and a dyeing pH of 3. The colorfastness of the material when dry cleaned or rubbed ranged from good to excellent and fastness to light was rated at grade 2-3. The change in the color grade when exposed to washing was not good; however, the stain of washing fastness was good at a range of 4-5. In regards to the functional property aspects, the dyed and mordanted fabrics exhibited excellent results with a 99.9% reduction rate, and excellent ultraviolet protection factors.

Development of Non-Contact Construction Management Supporting System For Cost Reduction and Duration Reduction By Real-Time Data Sharing (건설공사에서 실시간 현장 정보 공유에 의한 원가절감, 공기단축을 위한 비대면 건설사업관리 솔루션 개발)

  • Kang, Sang-Chan;Kim, Min-Jin;Jang, Myunghoun
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2021.05a
    • /
    • pp.323-324
    • /
    • 2021
  • This study is to develop a non-contact construction project management solution that can reduce cost and construction period through on-site information sharing, minimizing contact with others by COVID19, and improving the productivity of the construction industry. Decisions, checklists, and execution rates of construction costs can be checked with smart devices through sharing on-site photos and videos, exchanging opinions. Details and checklist data stored on cloud servers of sites that apply non-face-to-face construction project management solutions will be used as data for analyzing amounts and construction periods depending on the size of the construction. Real-time field information sharing will reduce expected problems and waste factors, expand communication channels with users to prevent or minimize construction disputes and claims, and contribute to the expansion and growth of new research industry markets in construction technology.

  • PDF

The effect of aromatherapy on pain in individuals with diabetes: a systematic review and meta-analysis

  • Mi-Kyoung Cho;Mi Young Kim
    • Journal of Korean Biological Nursing Science
    • /
    • v.26 no.2
    • /
    • pp.71-82
    • /
    • 2024
  • Purpose: This study systematically analyzed the impact of aromatherapy on pain in individuals with diabetes. Methods: A search was performed in seven electronic databases based on the PICO-SD (Population, Intervention, Comparison, Outcome, Study Design) framework. The population (P) of interest was individuals with diabetes, and the intervention (I) included aromatherapy targeting pain reduction. The comparison (C) consisted of control groups that received no intervention, another intervention, or usual care. The outcome (O) measured was pain. The quality of the selected literature was assessed using the Joanna Briggs Institute checklist. In MIX 2.0 Pro, the pooled overall effect of pain was calculated using Hedge's g and a random-effects model, and heterogeneity was calculated using the Q statistic and Higgin's I2 values. Meta-regression and exclusion sensitivity analyses were performed. Results: Five articles and seven studies were included, showing a significant pooled overall effect of aromatherapy on diabetes-related pain (Hedge's g = -1.83, 95% CI: -2.76 to -0.91). Meta-regression demonstrated that effectiveness in reducing pain was associated with studies conducted in West Asia, those with IRB approval, and those receiving funding. Additionally, interventions involving subjects under 60, lavender oil (vs. turpentine oil or blended oils), massage therapy (vs. topical application), fewer hours per session, and more repeated measurements (vs. pre/post measurements) were associated with pain reduction. Conclusion: Aromatherapy, especially with lavender oil, effectively manages diabetes-related pain. Short-duration massage application is also effective. A personalized selection of oil type and application method could optimize therapeutic outcomes for individuals with diabetes.

Anatomical Direct Reduction of Bony Mallet Finger Using Modified-Intrafocal Pinning Technique (변형-내초점 핀 고정술을 이용한 골성 망치 수지의 해부학적 직접 정복)

  • Kang, Sang-Woo;Park, Ji-Kang;Jung, Ho-Seung;Cha, Jung-Kwon;Kim, Kook-Jong
    • Archives of Hand and Microsurgery
    • /
    • v.23 no.4
    • /
    • pp.248-253
    • /
    • 2018
  • Purpose: The purpose of this study was to evaluate the clinical results of anatomic reduction of bony mallet finger using modified-intrafocal pinning technique. Methods: From March 2014 to October 2017, 18 patients with bony mallet finger were treated with modified-intrafocal pinning technique. Kirschner-wire was used to directly reduction the bony fragment, and extension block pinning and distal interphalangeal joint fixation were additionally performed to minimize the loss of reduction. Postoperative pain, range of motion, and radiological evaluation were performed. Duration of bone healing, functional recovery and complication rate were evaluated and Crawford's criteria was used to determine functional outcome after surgery. Results: Bone union was achieved in all cases after a postoperative mean of 6 weeks (5-7 weeks). An average of $2.8^{\circ}$ ($0^{\circ}-10^{\circ}$) extension loss occurred in all patients. All patients showed satisfactory joint congruency and reformation of the joint surface, the mean flexion angle of the distal interphalangeal joint at the final follow-up was $72.2^{\circ}$ ($70^{\circ}-75^{\circ}$). According to Crawford's classification, 12 patients (66.7%) were excellent and 6 patients (33.3%) were good. Conclusion: Modified-intrafocal pinning technique is a method of obtaining anatomical bone healing by directly reduction and fixation of the bony fragment. Combined with other conventional percutaneous pinning procedures, it is expected that good results can be obtained if applied to appropriate indications.

AN ELECTROMYOGRAPHIC INVESTIGATION OF MASTICATORY MUSCLES IN NORMAL OCCLUSION AND CLASS II MALOCCLUSION (저작근 근전도에 관한 정상교합자와 II급 부정교합자의 비교 연구)

  • Kim, Yeon-Kyung;Lee, Ki-Soo;Park, Young-Guk
    • The korean journal of orthodontics
    • /
    • v.22 no.2 s.37
    • /
    • pp.389-412
    • /
    • 1992
  • Along with form and function relationship of craniofacial growth comes a concern for the masticatory muscles with postnormal occlusion. It is the aim of this study to grope the certain differences upon the electromyographic activities of the masticatory muscles between normal occlusion and class II malocclusion during the varieties of oral functions. 26 persons of normal occlusion whose mean age were 18.9-25.6 years and another 26 persons of class II malocclusion whose mean age were 19.0-28.9 years served for this study. The electromyographic recordings processed by $Medelec^{\circledR}$ MS 25 EMG apparatus were taken from the anterior and posterior temporal, and anterior and posterior masseter muscles of both sides, and suprahyoid muscles as well. Analyses of the data toward such specific activities as mandibular rest, maximal biting, chewing gums and swallowing peanuts turned out the following summary and conclusions. 1. The maximal mean amplitude of the posterior temporalis showed significant augmentation in class II malocclusion, however the anterior temporalis, posterior masseter, and suprahyoid muscles manifested meaningful diminutions. 2. Stronger posterior temporalis and weaker anterior masseter and suprahyoid muscles were arranged in maximal biting with parameters of maximal mean amplitude. 3. The anterior temporalis of working side expressed smaller maximal mean amplitude in class II malocclusion. Significant swelling in duration were shown at anterior and posterior temporalis of working side, and posterior temporalis of balancing side in class II malocclusion, and marked reduction at anterior masseter of balancing side and posterior masseter of working side as well. The lessened latency were expressed at anterior masseter of working side, and anterior and posterior masseter of balancing side. Class II malocclusion group had significant prolongation of silent period duration. Mean silent period duration of 10.75 msec in normal occlusion and 24.37 msec in class II malocclusion were calculated. 4. Significant augmentations of maximal mean amplitude while swallowing peanuts were yielded at right anterior temporalis and posterior temporalis of both sides, however left anterior masseter and right posterior masseter showed diminution. No significant differences in duration showed at every muscle examined in class II malocclusion group.5. Weaker masseter and stronger temporalis were suggested as characteristics of class II malocclusion.

  • PDF