• Title/Summary/Keyword: efficacy rate

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Development of Control System of Twin-Fluid Nozzles for Controlling Spraying Rate and Droplet Size (이류체노즐을 이용한 분무량과 분무입경 제어시스템 개발)

  • 이중용;안형철;정창주
    • Journal of Biosystems Engineering
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    • v.25 no.1
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    • pp.11-18
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    • 2000
  • In precision chemical application increment of biological efficacy with less chemical is the virtue. spraying rate and droplet size is closely related to biological efficacy. this study was performed to develope a spray-control-system that could control spraying rate and droplet size independently. Twin-fluid nozzles were selected and tested to certify if the nozzles were suitable for the objective of this study. Characteritics of the nozzles i.e., spraying rte and droplet size change u8nder the changes of spraying pressure and air pressure were statistically modeled. The model had I to 1 matching property between dependent variables and independent variables. Using the property and the model, inverse relationship could be determined between variables. A feedback spray control system was developed and tested with predetermined error of 5 % in pressure. The system showed 4 % error in spraying rate and 9 % error in droplets size. Performance of the system could be upgraded by fine tuning but, in practical sense keeping air pressure in the field sprayer was the bottle neck of commercialization of the spray system.

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The Relationships Between Infant Temperament, Mother Temperament and Parenting Efficacy (영아 및 어머니의 기질과 부모효능감의 관계)

  • Yun, Hye-Jung;Hyun, On-Kang
    • Korean Journal of Child Studies
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    • v.28 no.2
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    • pp.1-17
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    • 2007
  • The subjects, 114 mothers with infants from 6- to 24- months of age, were administered the Infant Behavior Questionnaire-Revised(Gartstein & Rothbart, 2003), Adult Temperament Questionnaire(Derryberry & Rothbart, 1988) and Parenting Efficacy(Park & Rha, 2003; Lederman, Weigarten & Lederman, 1981) Boys were more distressed than girls in limitation and in falling reactivity/rate of recovery. Parenting efficacy was greater for mothers with daughters than mothers with sons. Infants' fear and distress to limitation correlated positively with mothers' sadness. Infants' attention span correlated positively with mothers' attentional control, inhibition control and positive control. Parenting efficacy was higher in mothers whose children fall asleep easily and have longer attention spans. Mothers' positive affect and activation control increased and frustration decreased parenting efficacy.

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The Effect of Transformational Leadership on the Efficacy and Organizational Citizenship Behavior of Hotel Convention Employees (호텔 컨벤션 종사원의 변혁적 리더십이 에피커시와 조직 시민 행동에 미치는 영향 - 서울 지역 특1급 호텔을 중심으로 -)

  • Cho, Sung-Ho
    • Culinary science and hospitality research
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    • v.14 no.4
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    • pp.368-384
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    • 2008
  • This study was designed to investigate the results of a performance analysis on the effect of transformational leadership on the efficacy of organizational citizenship behavior of hotel convention employees. This study referenced the relevant literature, proposed hypotheses to solve the main issues of inquiry, and made a corresponding empirical analysis. For the empirical analysis, a questionnaire was given to a total of 149 kitchen and food & beverage banquet employees at a Seoul area deluxe hotel convention. The model was tested using SPSS 12.0 and AMOS 5.0 on a sample of 149 surveys, of which 71% constituted a usable response rate. The results of the empirical analysis show the following. 1) Charisma and vision have a significant effect on group efficacy. 2) Individual consideration and intellectual stimulation have significant influence on self efficacy. 3) Individual consideration and intellectual stimulation have significant influence on group efficacy. 4) Altruism and conscientiousness have significant influence on group efficacy. 5) Sportsmanship and civic virtue have significant influence on self efficacy.

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The Effects of Gender, Obesity Rate, Nutrition Knowledge and Dietary Attitude on the Dietary Self-Efficacy of Adolescents (청소년의 성별, 비만도, 영양지식 및 식생활태도가 식이 자기효능감에 미치는 영향)

  • 이정숙
    • Korean Journal of Community Nutrition
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    • v.8 no.5
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    • pp.652-657
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    • 2003
  • This study was carried out to investigate the effects of the gender, obesity rate, nutrition knowledge and dietary attitude on the dietary self-efficacy of adolescents. The subjects were 1,022 (518 male, 504 female), aged 13-17 years living in Busan, Masan, Jinju and Jinhae city. This survey was conducted from April 8 to April 22,2002 by questionnaires and data were analyzed by SPSS program. The results are summarized as follows. Nutrition knowledge scores and dietary self-efficacy scores of the females were higher than those of the males. The higher the nutrition knowledge and dietary attitude scores, the higher dietary self-efficacy. Dietary attitude has direct effects on dietary self-efficacy and obesity rate has in-direct effects which was mediated by nutrition knowledge. Gender and nutrition knowledge have direct effects and indirect effects which were mediated by dietary attitude. Dietary attitude showed the greatest total causal effect in relation to dietary self-efficacy.

Long Time Efficacy and Safety of Microvascular Decompression Combined with Internal Neurolysis for Recurrent Trigeminal Neuralgia

  • Zheng, Wenhao;Dong, Xiaoqiao;Wang, Din;Hu, Qiang;Du, Quan
    • Journal of Korean Neurosurgical Society
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    • v.64 no.6
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    • pp.966-974
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    • 2021
  • Objective : To explore the clinical efficacy and safety of microvascular decompression (MVD) combined with internal neurolysis (IN) in the treatment of recurrent trigeminal neuralgia (TN) after MVD. Methods : Sixty-four patients with recurrent TN admitted to the hospital from January 2014 to December 2017 were divided into two groups according to the surgical method. Twenty-nine patients, admitted from January 2014 to December 2015, were treated with MVD alone, whereas 35 admitted from January 2016 to December 2017 were treated with MVD+IN. The postoperative efficacy, complications, and pain recurrence rate of the two groups were analyzed. Results : The efficacy of the MVD+IN and MVD groups were 88.6% and 86.2%, and the cure rates were 77.1% and 65.5% respectively. There was no statistically significant difference between the two groups (p>0.05). The cure rate (83.3%) of patients in the MVD+IN group, who were only found thickened arachnoid adhesions during the operation that could not be fully released, was significantly higher than that of the MVD group (30.0%) (p<0.05), while the efficacy (91.7% vs. 70%) of the two groups was not statistically different (p>0.05). For patients whose arachnoid adhesions were completely released, there had no significant difference (p>0.05) in the efficacy (87% vs. 94.7%) and recurrence rate (5.0% vs. 11.1%). The incidence of postoperative facial numbness (88.6%) in the MVD+IN group was higher than that in the MVD group (10.3%) (p<0.01). The long-term incidence of facial numbness was not statistically significant (p>0.05). In the 18-36 months follow-up, the recurrence rate of patients in the MVD+IN group (9.7%) and in the MVD group (16%) were not statistically different (p>0.05). Conclusion : A retrospective comparison of patients with recurrent TN showed that both MVD and MVD combined with IN can effectively treat recurrent TN. Compared with MVD alone, MVD combined with IN can effectively improve the pain cure rate of patients with recurrent TN who have only severe arachnoid adhesions. The combination does not increase the incidence of long-term facial numbness and other complications.

Comparison of Educational Effects on Hands-only Cardiopulmonary Resuscitation (CPR) with Basic Cardiopulmonary Resuscitation (CPR) by Elementary School Students (초등학생 가슴압박소생술과 기본심폐소생술의 교육효과 비교)

  • Ahn, Myung Ja;Kim, Young Im
    • Journal of the Korean Society of School Health
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    • v.27 no.3
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    • pp.130-139
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    • 2014
  • Purpose: The object of this study was to compare the educational effect about self-efficacy and the quality of chest compressions of Hands-only CPR and Basic CPR. Methods: It's a nonequivalent control group pre-post repeated quasi-experiment study conducted with entire fifth grade students belong to one school in H city. The study participants are 68 persons, and data were collected from December 2, 2013 to February 7, 2014. Self-efficacy was measured by 10 items, and the quality of chest compressions was measured by 5 variables which are average compression depth(mm), average rate (n/min), average count per minutes (n), abnormal placement (n), compression accuracy (%). Results: Self-efficacy of the experimental group and control group showed no significant difference but showed significant difference over time and was the highest at posttest 1 (immediately after education), the lowest at pretest (before education), middle at posttest 2 (8weeks after education) (p<.001). Experimental group was significantly higher than control group in average rate per minute. At posttest 1, experimental group was $130.0{\pm}9.38$ times, control group was $95.1{\pm}11.82$ times. At posttest2, experimental group was $124.0{\pm}14.89$ times, control group was $90.8{\pm}14.89$ times.(p<.001). Average rate (n/min) was significantly declined at control group in the quality of chest compressions over time (t=-2.400, p=.022). Average count per minute and compression accuracy were declined significantly so it were not maintained to posttest2. Conclusion: We need continuous CPR education because self-efficacy of CPR getting lower significantly over time. Hands-only CPR can't be seen as a way to increase the CPR ability of elementary school students having difficulty to perform artificial breathing. And, because the effect of education is not maintained 8wks after training, the technique centered repeated training is needed and a method which can increase compression accuracy is also needed.

Comparison of the Therapeutic Efficacy and Technical Outcomes between Conventional Fixed Electrodes and Adjustable Electrodes in the Radiofrequency Ablation of Benign Thyroid Nodules

  • Jae Ho Shin;Minkook Seo;Min Kyoung Lee;So Lyung Jung
    • Korean Journal of Radiology
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    • v.25 no.2
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    • pp.199-209
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    • 2024
  • Objective: This study aimed to compare therapeutic efficacy and technical outcomes between adjustable electrode (AE) and conventional fixed electrode (FE) for radiofrequency ablation (RFA) of benign thyroid nodules. Materials and Methods: Between 2013 and 2021, RFA was performed on histologically proven benign thyroid nodules. For the AE method, AE length ≥ 1 cm with higher power and < 1 cm with lower power were utilized for ablating feeding vessels and nodules, especially those near anatomical structures, respectively. The therapeutic efficacy (volume reduction rate [VRR], complication rate, and regrowth rate) and technical outcomes (total energy delivery, ablated volume/energy, RFA time, and ablated volume/time) of FE and AE were compared. Continuous parameters were compared using a two-sample t-test or Mann-Whitney U test, and categorical parameters were compared using a chi-squared test or Fisher's exact test. Results: A total of 182 nodules (FE: 92 vs. AE: 90) in 173 patients (mean age ± standard deviation, 47.0 ± 14.7 years; female, 90.8% [157/173]; median follow-up, 726 days [interquartile range, 441-1075 days]) were analyzed. The therapeutic efficacy was comparable, whereas technical outcomes were more favorable for AE. Both electrodes demonstrated comparable overall median VRR (FE: 92.4% vs. AE: 84.9%, P = 0.240) without immediate major complications. Overall regrowth rates were comparable between the two groups (FE: 2.2% [2/90] vs. AE: 1.1% [1/90], P > 0.99). AE demonstrated a shorter median RFA time (FE: 811 vs. AE: 627 seconds, P = 0.009). Both delivered comparable median energy (FE: 42.8 vs. AE: 29.2 kJ, P = 0.069), but AE demonstrated higher median ablated volume/energy and median ablated volume/time (FE: 0.2 vs. AE: 0.3 cc/kJ, P < 0.001; and FE: 0.7 vs. AE: 1.0 cc/min, P < 0.001, respectively). Conclusion: Therapeutic efficacy between FE and AE was comparable. AE demonstrated better technical outcomes than FE in terms of RFA time, ablated volume/energy, and ablated volume/time.

Field Trials on the Efficacy of New Broad-Spectrum Anthelmintics 1. Anthelmintic Efficacy of Albendazole Against Gastrointestinal Nematodes, Trematodes and Cestode in Korean Native Goat (반추수의 내부기생충에 대한 신종 광범위구충제의 구충효과 - I. Albendazole (Valbazen-B)의 구충효과)

  • Suh Myung-Deuk;Lee Soon-Sun;Cho Hee-Taek
    • Journal of the korean veterinary medical association
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    • v.21 no.10
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    • pp.605-611
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    • 1985
  • The anthelmintic efficacy of Albendazole(Valbazen-B) at a dose rate of 10mg /kg of body weight was tested in naturally infected Korean native goats against gastrointestinal nematodes, trematodes and cestode. The drug was administered with Valbazen-B bolus

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Field Trials on the Efficacy of New Broad-Spectrum Anthelmintics - 2. Anthelmintic Efficacy of Ivermectin Against Gastrointestinal Nematodes, Trematodes and Cestode in Korean Native Goats (반추수의 내부기생충에 대한 신종 광범위구충제의 구충효과 : 2. Ivermectin의 구충효과)

  • Lee Soon-Sun;Cho Hee-Taek;Suh Myung-Deuk
    • Journal of the korean veterinary medical association
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    • v.23 no.11
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    • pp.723-728
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    • 1987
  • This study was conducted to evaluate the anthelmintic efficacy of Ivermectin(Ivomec) against naturally infected gastrointestinal nematoeds, trematodes and cestode in Korean Native goats. Ivermectin was injected at a dose rate 0.2mg/kg of body weight subcu

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Mediating Effect of Learning Strategy in the Relation of Mathematics Self-efficacy and Mathematics Achievement: Latent Growth Model Analyses (수학 자기효능감과 수학성취도의 관계에서 학습전략의 매개효과 - 잠재성장모형의 분석 -)

  • Yum, Si-Chang;Park, Chul-Young
    • The Mathematical Education
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    • v.50 no.1
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    • pp.103-118
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    • 2011
  • The study examined whether the relation between mathematics self-efficacy and mathematics achievement was partially mediated by the learning strategies, using latent growth model analyses. It was also examined the auto-regressive, cross-lagged (ARCL) panel model for testing the stability and change in the relation of mathematics self-efficacy and learning strategy over time. The study analyzed the first-year to the third-year data of the Korean Educational Longitudinal Survey (KELS). The result of ARCL panel model analysis showed that earlier mathematics self-efficacy could predict later learning strategy use. There were linear trends in mathematics self-efficacy, learning strategy, and mathematics achievement. Specifically, mathematics achievement was increased over the three time points, whereas mathematics self-efficacy and learning strategies were significantly decreased. In the analyses of latent growth models, the mediating effects of learning strategies were overall supported. That is, both of initial status and change rate of rehearsal strategy partially mediated the relation of mathematics self-efficacy and mathematics achievement. However, in elaboration and meta-cognitive strategies, only the initial status of each variable showed the indirect relationship.