Water utilities are making various efforts to reduce water losses from water networks, and an essential part of them is to recognize the moment when a pipe burst occurs during operation quickly. Several physics-based methods and data-driven analysis are applied using real-time flow and pressure data measured through a SCADA system or smart meters, and methodologies based on machining learning are currently widely studied. Water utilities should apply various approaches together to increase pipe burst detection. The most intuitive and explainable water balance method and its procedure were presented in this study, and the applicability and detection performance were evaluated by applying this approach to water supply pipelines. Based on these results, water utilities can establish a mass balance-based pipe burst detection system, give a guideline for installing new flow meters, and set the detection parameters with expected performance. The performance of the water balance analysis method is affected by the water network operation conditions, the characteristics of the installed flow meter, and event data, so there is a limit to the general use of the results in all sites. Therefore, water utilities should accumulate experience by applying the water balance method in more fields.

The yellow mealworm, Tenebrio molitor L. (Coleoptera: Tenebrionidae), is an important industrial insect commercially produced around the world as food and feed. Temperature and nutrition are the two most influential environmental factors determining the rearing conditions in insects, but little is known about how these two factors interact to affect the performance of T. molitor larvae. In this study, we investigated the combined effects of temperature and dietary protein:carbohydrate (P:C) ratio on key performance traits in T. moltior larvae. Throughout their larval stage, the insects were reared on one of 36 treatment combinations of six temperatures (19, 22, 25, 28, 31, 34 °C) and six protein:carbohydrate ratios (P:C = 1:5, 1:2, 1:1, 2:1, 5:1, 1:0) and their survivorship, development, growth rate, and pupal mass were monitored. Survivorship was high at low temperatures (< 25°C) and high P:C ratios (>1:1), but decreased with increasing temperature and decreasing P:C ratio. Increase in rearing temperature accelerated larval development but resulted in a reduced pupal mass. Thermal optimum for pupal mass (19.3°C) was thus lower than that for development time (28.1°C). The growth rate was maximized at 27.9°C and P:C 1.65:1 and decreased as both the temperature and the P:C ratio deviated from their optimum. All four key performance traits (survivorship, development time, pupal mass, growth rate) were optimized at temperatures between 25.7 and 27.4°C and P:C ratios between 1.17:1 and 2.94:1. Our data provide insights into how the production and nutritional value of T. molitor larvae can be improved through adjusting their rearing conditions.

Innovative companies after the first and second waves of the COVID-19 pandemic are undergoing significant changes: from new trends in the markets to the growth of remote work in the digital environment. At any stage of development, innovative companies need an adaptive marketing approach to the implementation of the planned strategy. Marketing solutions to the problems of a volatile, uncertain, complex and ambiguous environment (VUCA) in 2023 can rightfully be considered an emergency aid to innovative transformations in emerging markets. The triad “market orientation – innovation – performance” chain has been extended to various innovation types– from technological and product innovation to innovation orientation and capability. Moreover, the market orientation research agenda has, during last 10 years, highlighted customer orientation as a key component of market orientation that drives innovative activities.

본 연구는 기업 구성원의 자발적 이직률에 관하여 인적자원관리 대표적 체계인 고성과작업시스템 (HPWS) 관행과 사회적 패러다임의 변화에 따른 일과 삶의 균형(WLB) 관행이 미치는 영향 및 고성과작 업시스템 관행과 일과 삶의 균형 관행과의 상호작용이 미치는 영향을 분석하였다. 연구의 표본은 한국노동연구원의 사업체 패널자료 4차(2011년)부터 7차(2017년)까지 조사된 데이터를 사용하였으며, 변수측정을 위한 번들 구성은 AMO(Ability, Motivation, Opportunity) 이론에 기반한 HPWS 12개의 관행과 고용 노동부에서 WLB 정책에 대해 3대 핵심분야로 분류한 유연근무, 모성보호, 휴가지원의 관행으로 각각 구성하여 변수측정에 활용하였다. 연구의 결과는 HPWS와 유연근무제도가 자발적 이직률을 낮추는 것으로 나타났고, HPWS와 유연근무제도의 상호작용은 대체(Substitute)적 조절 관계가 있음을 확인하였다. 이에 반해 유연근무제도를 제외한 모성보호지원제도, 휴가지원제도는 자발적 이직률에 유의한 영향을 주지 않았고 또한, 자발적 이직률과 HPWS와의 부(-)적 관계에 유의한 조절 작용을 하지 않았다. 이러한 결과는 본 연구표본의 대부분을 차지하는 제조업에서의 WLB 정책시행과 활성도의 차이(decoupling)와 여가 보다는 생산성 중심에 익숙한 조직문화 등이 복합적으로 작용한 것으로 추측되며 이러한 결과들은 향후 유연근무제도 등 일과 삶의 조화를 추구하는 관행들과 고성과 작업체제 관행들과의 적절한 균형을 추구 하는 방향으로 인적자원관리 정책이 요구되는 현실을 반영하고 있다고 본다.

Background:Children with cerebral palsy (CP) have impaired postural control, but critically require the control of stability. Consequently, therapeutic interventions for enhancing postural control in children with CP have undergone extensive research. One intervention is sensorimotor training (SMT) using a Flexi-bar, but this has not previously been studied with respect to targeting trunk control in children with CP.Objects:This study was conducted to determine the effect of SMT using a Flexi-bar on postural balance and gait performance in children with CP.Methods:Three children with ambulatory spastic diplegia (SD) participated in the SMT program by using a Flexi-bar for forty minutes per day, three times a week, for six weeks. Outcome variables included the pediatric balance scale (PBS), trunk control movement scale (TCMS), 10 meter walking test (10MWT), and 3-dimensional movement coordination measurement.Results:The SMT provided no statistically significant improvement in PBS, TCMS, 10MWT, or 3-dimensional movement coordination measurement. However, positive changes were observed in individual outcomes, as balance and trunk control movement were improved.Conclusion:SMT using a Flexi-bar may be considered by clinicians as a potential intervention for increasing postural balance and performance in children with SD. Future studies are necessary to confirm the efficacy of Flexi-bar exercise in improving the functional activity of subjects with SD.

본 연구는 최근 일과 가정생활에 대한 가치관 변화와 경력관리에 대한 관심이 증가되고 있음을 기반으 로 시작되었다. 사회생활에서의 성공과 발전을 우선시했던 과거와 달리 요즘의 직장인들은 가정생활과 더불어 개인적인 여가활동과 자기계발에도 큰 가치를 두고 있다. 또한 평생직장과 종신고용의 개념이 사 라지면서 미래의 고용가능성을 높여줄 수 있는 경력관리에도 높은 관심을 보인다. 이에 일가정균형과 경력관리는 조직연구의 중요한 주제가 되어 왔으며 본 연구에서는 우리나라 서비스업에 종사하고 있는 3천 명의 정규직을 대상으로 일가정균형과 경력관리가 조직구성원들의 성과행동에 미치는 영향력을 규명해 보았다. 특히 사회적으로 일과 가정생활을 동시에 수행하도록 요구받을 뿐 아니라 출산으로 인한 경력단 절이 빈번하게 일어나는 여성근로자에게 일가정균형과 경력관리가 더 절실한 요인이 될 수 있다는 점에 서, 남성과 여성 간 성별 차이와 여성에 대한 성차별의 조절효과도 함께 분석하였다. 그 결과, 일가정균형 과 경력관리 모두 조직구성원들의 과업성과와 혁신성향, 그리고 조직시민행동을 높이는 것으로 나타났다. 하지만 가설과 달리 성별 차이의 조절효과는 없는 것으로 증명되어 일가정균형과 경력관리의 영향력은 남성과 여성 모두에게 중요한 요인임을 알 수 있었다. 이와 더불어 성차별의 부정적인 조절효과가 규명됨 으로써 조직의 실무자들은 일가정균형과 경력관리의 긍정적인 영향력이 향상될 수 있도록 조직 내 성차 별적인 HR시스템을 개선하는 것이 중요할 것으로 보인다. 이러한 연구결과를 바탕으로 일가정균형과 경 력관리, 그리고 성차별의 영향력이 조직과 관리자에게 주는 실무적 함의점을 심도있게 논의하였다.

The purpose of this study was to examine the relationships between the ankle dorsiflexion passive range of motion (DF PROM) under a non-weight bearing condition and the normalized reach distance in three directions of the Y-Balance Test (YBT). Sixty-one healthy adults (32 males and 29 females, age: 23.0±3.0 years, height: 169.3±8.9 ㎝, weight: 61.9±5.4 ㎏) participated in this study. The ankle DF PROM was measured using a goniometer. To assess dynamic balance, all subjects performed three trials to determine the maximum lower extremity reach in the anterior, posteromedial, and posterolateral directions of the YBT. The relationship between the ankle DF PROM and both the normalized reach distance in each direction and the composite score of the YBT were analyzed using the Pearson correlation. Only the normalized reach distance in the anterior direction of the YBT was significantly related to the ankle DF PROM measured under a non-weight bearing condition (r=.50, p＜.001). Neither the normalized reach distances in the posterior directions nor the composite score of the YBT were significantly correlated with the ankle DF PROM measured under a non-weight bearing condition. These findings suggest that ankle DF PROM does not affect the overall dynamic balance of the lower extremity, with only the anterior dynamic balance affected among the three directions.

The purpose of this study was to examine the effects of dual-task training (cognitive and exercise tasks) on the balance and gait performance of chronic stroke patients. Eighteen subjects with chronic stroke were divided equally into two groups, an experimental group and a control group. Subjects in both groups participated in an exercise program, performing the same tasks, for 45 minutes per day, three times per week for four weeks. The experimental group also performed additional cognitive task. The experimental group showed a more significant improvement than the control group on the Berg Balance Scale, the Timed Up and Go Test, the Korean Activities-Specific Balance Confidence Scale, and the Functional Gait Assessment (p<.05). The cognitive task error rates in the final week were significantly less than in the first week in the experimental group (p<.01). These results suggest that dual-task training for chronic stroke patients is effective in improving balance, gait, and cognitive abilities.

목적 : 본 연구의 목적은 균형능력에 문제가 있는 만성 뇌졸중 환자를 대상으로 과제 지향적 활동의 실험군과 보존적 작업치료의 대조군과의 중재결과를 비교하여 일상생활동작의 수행 능력과 균형능력, 만족도에 미치는 영향을 알아보고자 하였다. 연구방법 : 본 연구는 2000년 7월부터 2008년 6월까지 뇌졸중 진단을 받고 서울 △병원에서 입원 치료를 받은 대상자 중 본 연구 목적에 맞는 실험군 18명 대조군 15명을 대상으로 실시하였다. 모든 중재는 훈련받은 2인의 작업치료사가 3개월 동안 주 5회, 1일 30분씩 시행하였고, 실험군은 과제 지향적 활동으로, 대조군은 신경발달치료를 기반으로 한 보존적 작업치료로 중재하였다. 중재 전·후 일상생활동작과 균형능력, 작업수행 만족도는 Berg Balance Scale(BBS), Canadian Occupational Performance Measure(COPM), Functional Independence Measure(FIM)으로 측정하였다. 결과 : 중재 후 과제 지향적 활동의 실험군(p<.001)과 보존적 작업치료를 받은 대조군(p<.01)의 균형능력과 일상생활동작 수행능력, 환자의 만족도 모두 중재 전보다 유의하게 향상되었다. 중재 후 집단 간 비교에서는 균형능력(p<.05)과 환자의 만족도(p<.01)에서 실험군이 대조군보다 유의하게 향상되었다. 일상생활동작 수행능력에서는 집단 간 차이를 보여주지 못했다(p>.05). 결론 : 본 연구 결과에 근거하여 과제 지향적 활동이 보존적 작업치료보다 만성 뇌졸중 환자의 일상생활동작 수행능력과 균형능력, 만족도를 향상하는데 도움이 될 것으로 보인다.

The purpose of this study was to investigate the effect of attentional focus and distance of external focus on the performance of balance task of upper extremity. Subjects (N=30) held a stick (2 m) and maintained it horizontally. All of the subjects performed balance task of upper extremity under four different attentional focus conditions: focus on hand (internal focus), marker at 10 cm inside of hand (external focus 1), marker at 10 cm outside of hand (external focus 2), marker at 20 cm outside of hand (external focus 3). The mean velocity of the bar (mm/s) and the muscle activity of biceps brachii (%RVC) were measured. They were decreased when the subjects focused on external focuses compared to internal focus and decreased as distance of attentional focus from body increased (p<.05). There were significant differences between groups (p<.05); internal focus-external focus 1, internal focus-external focus 2, internal focus-external focus 3, external focus 2-external focus 3. These results showed that external focus is more effective than internal focus in enhancing motor performance and focusing on more distant attentional focus results in enhanced motor performance promoting the utilization of more automatic control mechanisms.

The aim of this study was to investigate correlations of the Trunk Control Test (TCT), Postural Assessment Scale for Stroke (PASS-TC), and Trunk Impairment Scale (TIS) and to compare the TCT, PASS-TC, TIS and its subscales in relation to balance, gait and functional performance ability after stroke. Sixty-two stroke patients attending a rehabilitation program participated in the study. Trunk control was measured with the use of TCT, PASS-TC, TIS balance (Berg Balance scale; BSS), gait ability (10 m walk test), functional performance ability (Tuned Up and Go Test TUG) and the mobility part of the Modified Barthel index (MBI), Fugl Meyer-Upper/Lower Extremity (FM-U․L/E). The scatter-plot (correlation coefficient) was composed for the total scores of the TCT, PASS-TC, and TIS. The multiple regression analysis was performed to evaluate the impact of trunk control on balance, gait, and functional performance ability. Twenty eight participants (45.2%) and twenty participants (32.3%) obtained the maximum score on the TCT and PASS-TC respectively; no subject reached the maximum score on the Trunk Impairment Scale. There were significant correlations between the TIS and TCT (r=.38, p<.01), PASS-TC (r=.30, p<.05), TCT and PASS-TC (r=.59, p<.01). Stepwise multiple regression analysis showed that the BBS score (β=.420～.862) had slightly more power in predicting trunk control than the . TIS-dynamic sitting balance, TUG and the MBI-mobility part. This study clearly indicates that trunk control is still impaired in stroke patients. Measures of trunk control were significantly related with values of balance, gait and functional performance ability. The results imply that management of trunk rehabilitation after stroke should be emphasized.

The purpose of this study was to investigate the effect of balance training with upper extremity exercise on the improvement of balance performance in people who have had a stroke. Eighteen candidates who have all experienced a stroke, were living in Dong-Gu, Ulsan and were participating in a community based rehabilitation program, have been included in this study. The program was conducted three times weekly, 1 hour per session, for 7 consecutive weeks. Subjects were tested with 7 m and 100 m Timed Gait Test (sec), Timed Get Up and Go Test (sec), Functional Reach Test (cm) and 5 items of Berg's Balance Test at pre-training and post-training. Total balance index and balance ratios were measured by K.A.T. 3000. The balance training program performed by sitting on a chair and gymnastic ball and standing on stable and unstable surfaces during upper extremity exercises such as Proprioceptive Neuromuscular Facilitation (PNF) upper extremity pattern, picking a ball up from floor, throwing and catching it. After seven weekends of balance training, subjects showed a significant difference in balance test results. The exceptions were three items of Berg's Balance Test (p<.05). Balance index score and affected and unaffected side balance ratio had a larger improvement than pre-training (p<.05). The result of this study showed that intervention of this balance training program could improve the balance performance in people who have had a stroke.

The purposes of this study were to determine correlations between the Berg Balance Test (BBS), Timed -UP & Go Test, Fugl Meyer-L/E, Balance, Sensory (FM-L/E, B, S), Motor Assessment Scale-Gait (MAS-G), Comfortable maximal Gait Speed (C MGS), and the Modified Barthel Index (MBI). The subjects were 40 stroke patients of the Korea National Rehabilitation Center in Seoul. Main outcome measures were Balance control (BBS, FM-B), Gait (TUG, C MGS, MAS-G), ADL (MBI) and Motor Function of Lower Extremities (FM-L/E, S). The data were analyzed using Pearson product correlation. FM scales between other clinical and instrumental indexes and multiple stepwise regression analyses were performed to identify prognostic factors for Balance, Gait and ADL Motor Function of Lower Extremity inclinations. The results of this study were as follows: The BBS, FM-L/E, balance, sensory and MBI showed positive correlation relations, but TUG and C MGS showed negative correlations. The sensory factor of the FM-scale showed the strongest variance in predicting BBS. However the FM-balance showed the strongest variance in predicting TUG, MAS-G and C MGS. The use of both quantitative and qualitative scales was shown to be a good measuring instrument for the classification of the general clinical performance of the patients.

The objective of this study was to discern the effects of a balance training program on the performance of lower extremities in order to improve strength (muscle power, flexibility, walking power), balance control and walking ability in the elderly. The subjects selected were aged 65 years and over, with no known relevant medical history that may disturb their balance, and have also been visiting the Gimhae Senior Welfare Center. The variable group consisted of 30 subjects, of whom were people who had been participating in balance training programs (One Leg Standing; OLS, Functional Reach; FR, Timed Get Up and Go; TUG) as an intervention for 8 weeks 3 times per a week. They were examined in order to identify their balance control before and after. The control group consisted of thirty subjects who preferred to exercise without any intervention relating to balance training program. The subjects were measured before and after balance training in order to determine the effectiveness of exercise and the effectiveness of exercise combined with the aid of a Balance Performance Monitor. 1. Mean time on OLS test with left and right sided extremities in the experimental group was 35.44 sec, 42.10 sec longer than control group respectively. In FR tests applied to the left and right side, mean reaching distance was increased up to 5.56 cm, 6.73 cm in experimental group respectively. Mean time on TUG test from a chair in experimental group was decreased to 2.33 sec. 2. Mean value of decline in the level balance control, both left and right side, decreased to 2.24% as examined by the Balance Performance Monitor. Mean scores for sway level after balance training decrease to .98% and for balance control both anterior and posterior directions decreased to mean 1.07% and 1.44%, respectively.

During therapy sessions, feedback is often provided concurrently by the physical therapist as the patient attempts to perform a movement and after the movement attempt. This feedback is provided to enhance the patient's balance abilities. However, recent studies in nondisabled populations have suggested that frequent feedback may be detrimental to retention or learning of motor skills. This study compared the effects of 100% relative frequency of knowledge of performance (KP) with 66% relative frequency of KP for motor learning on balance retraining in patients with hemiplegia. Twenty patients with hemiplegic were randomly assigned to one of two experimental groups. The acquisition phase consisted of 16 blocks of 5 trials for 2 days (80 total practice trials). The retention phase consisted of 2 blocks of a short-term retention test, one day after the end of the acquisition phase and a long-term retention test, one week after the end of the short-term retention test. In the 100% feedback condition, participants received feedback after every practice trial. A faded KP schedule was used in the 66% condition. No significant differences were found between the two groups during all experimental phases (acquisition and retention phases), (p>.05). However, there were significant decreases in balance index for both groups of acquisition phase (p<.05). These results suggest that 66% relative frequency of KP is not more effective than 100% relative frequency of KP with respect to retention over time when hemiparetic patients attempt to learn balance.

This study aims to add insight into the effectiveness of e-training, e-leadership, work-life balance, and work motivation on millennial generation employees’ performance in today’s work life amid the outbreak of the COVID-19 pandemic that requires to work more online. Unlike previous generations, millennials are technology-literate, intent on succeeding quickly, give up easily, and seek instantaneous gratification. The population in this study are millennial generation employees at one of Honda motorcycle dealers in Jakarta, Indonesia. The number of samples collected was 200. The sampling technique used is the side probability method, with proportional random sampling technique. The research method used is an associative quantitative approach through survey methods and Structural Equation Modeling. Data were collected through questionnaires distributed to millennial generation employees, with results then processed through the Lisrel 8.5 program. The results of this study show, first, that e-training, e-leadership, and work-life balance have positive effect on work motivation. Second, e-training, e-leadership, work-life balance, and work motivation have positive effect on employees’ performance. The findings indicate that companies must pay attention to the factors of e-training, e-leadership, and work-life balance to keep employees motivated and to maintain optimal employee performance, especially during the COVID-19 pandemic through working online.

본 연구는 중추신경계의 일부분으로서 신체의 자세 및 자발적 움직임의 조절과 평형을 유지하는 기능을 담당하는 소뇌에 이상이 있는 환자를 대상으로 댄스-기반 운동치료 프로그램이 환자의 균형과 보행능력의 재학습에 어떠한 영향을 주는지 조사하였다. 연구의 참가한 소뇌질환 환자는 유전적 원인으로 인해소뇌의 신경세포가 사멸하여 그 크기가 감소하는 소뇌위축증(cerebellar atrophy)으로 진단을 받고 그로인한 운동장애인 운동실조증(ataxia)을 보인 1명의 환자를 대상으로 하였다. 연구 대상자는 파트너 댄스인 탱고 스텝에 기반을 둔 운동치료 프로그램에 8주에 걸쳐 매주 3회씩 한번에 90분씩 진행하는 수업에 참가하였다(총 24회). 연구 결과, 댄스에 기반을 둔 운동 치료 프로그램에 참여한 소뇌성 운동실조증 환자의 평지 보행 능력 측정에서의 보폭 길이가 증가하였으며 보간 너비가 감소한 것으로 나타났다. 또한 보행 주기 중 한 다리 지지기 비율과 균형 능력의 향상과 같은 긍정적 상호작용도 나타났다. 보다 기능적인 보행 능력을 평가하는 장애물 넘기 보행에서는 장애물을 넘기 직전의 움직임 동결 시간이 감소하였으며, 장애물을 넘기 전 선행하는 발의 이륙거리와 장애물 통과 속도는 초기에 비해 사후 검사에서 증가하는 양상을 나타냈다. 이러한 결과는 댄스-기반 운동치료 프로그램 훈련이 소뇌성 운동실조증 환자에게 적용되었을 때 정상적인 보행주기 패턴의 재정립과 균형 능력의 회복에 긍정적인 영향을 줄 수있음을 보여준다.