• International Journal of Computer Science & Network Security
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• 제24권5호
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• pp.1-10
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• 2024

Individuals with visual impairments face numerous challenges in their daily lives, with navigating streets and public spaces being particularly daunting. The inability to identify safe crossing locations and assess the feasibility of crossing significantly restricts their mobility and independence. Globally, an estimated 285 million people suffer from visual impairment, with 39 million categorized as blind and 246 million as visually impaired, according to the World Health Organization. In Saudi Arabia alone, there are approximately 159 thousand blind individuals, as per unofficial statistics. The profound impact of visual impairments on daily activities underscores the urgent need for solutions to improve mobility and enhance safety. This study aims to address this pressing issue by leveraging computer vision and deep learning techniques to enhance object detection capabilities. Two models were trained to detect objects: one focused on street crossing obstacles, and the other aimed to search for objects. The first model was trained on a dataset comprising 5283 images of road obstacles and traffic signals, annotated to create a labeled dataset. Subsequently, it was trained using the YOLOv8 and YOLOv5 models, with YOLOv5 achieving a satisfactory accuracy of 84%. The second model was trained on the COCO dataset using YOLOv5, yielding an impressive accuracy of 94%. By improving object detection capabilities through advanced technology, this research seeks to empower individuals with visual impairments, enhancing their mobility, independence, and overall quality of life.

• 융합보안논문지
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• 제22권2호
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• pp.105-114
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• 2022

본 논문은 퍼스널 모빌리티(Personal Mobility, PM)를 이용하는 청각 장애인에게 소리가 발생하는 도래각(Direction of Arrival, DOA)을 시각화하는 지능형 제어 시스템을 제시하며 도로에서 발생하는 경보음, 크락션 등 소리로 인한 위험한 상황들을 인지하고 예방하고자 한다. 소리 위치 추정 방법은 GCC-PHAT(Generalized Cross-Correlation Phase Transform) 기반 도착 지연 시간(Time Difference of Arrival, TDOA)을 특징으로 갖는 머신러닝 분류 모델을 사용한다. 도로 상황을 재현한 실험 환경에서 각각 풍속 0, 5.8, 14.2, 26.4km/h의 조건에 따라 학습 데이터를 추출한 후 학습한 4가지 분류 모델들을 Grid search cross validation으로 비교하며 성능이 가장 우수한 MLP(Multi-Layer Perceptron) 모델을 알고리즘으로 적용하였다. 최종적으로 바람이 발생하였을 때 제안된 알고리즘이 평균 90.7%의 정확도를 나타내었으며, 이는 기존의 일반적인 소리 위치 추정기법보다 평균 7.6-11.5% 정도의 성능 향상을 보이는 것이다.

• Journal of Preventive Medicine and Public Health
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• 제32권3호
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• pp.325-332
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• 1999

Objectives: The aim of this study is to identify major factors associated with physical functioning among the Korean elderly. Methods: Data come from a survey of a nationally representative sample of 2,058 older people aged 60 years or elder living in the community. A hierarchical functioning scale was constructed, using upper and lower body mobility, IADLs, and ADLs. Socioeconomic characteristics, chronic conditions, measures of health status, health service use, and social support were analyzed to explore their influence on functioning. Polytomous logistic regression analysis was conducted to identify major contributing factors to different levels of functioning. Results: Persons of older age, female, with chronic diseases (heart disease, stroke, fracture/dislocation) were consistently more likely to show a higher degree of functional limitation. There were variations, however, among other factors; e.g., those with arthritis were more likely to be only mildly impaired, but not moderately or severely impaired. Conclusions: Older Korean adults living in the community with impaired functioning constitute persons with diverse characteristics. Policy and program activities need to address specific needs of older people in different functioning states.

• 한국의류산업학회지
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• 제25권4호
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• pp.520-533
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• 2023

The present study developed a test protocol for evaluating the mobility of firefighting chemical and flame personal protective equipment (PPE) for the National 119 Rescue Headquarters in Korea and suggested ergonomic design factors to improve their mobility and performance. Six types of PPE were employed, including three types for flame protective PPE (5 ~ 6 kg excluding the self-contained breathing apparatus), and three types for chemical and flame protective PPE (8 ~ 11 kg). These PPEs are used by the 119 Rescue firefighters. Three male firefighters (34.3 ± 1.2 y in age, 175 ± 8 cm in height, 81 ± 13 kg in body weight) participated in the mobility test and interview. A mobility test protocol consisting of 16 components (nine postures and seven motions including a dexterity test) along with a visibility test were developed based on pre-interviews and literature reviews. The findings indicated that the clothing microclimate humidity on the neck and chest exceeded 85%RH on average for all the six PPE conditions, with the chest area reaching as high as 98%RH. This high humidity caused fogging inside the visor and impaired visibility. The requirements for improving the PPE design in terms of mobility varied depending on whether it was the separated types or all-in-one types, particularly regarding the hood and gloves design. The findings of this study can be applied to improve the design of Level A_PPE for firefighters. The mobility test protocol and visibility test developed in this study can also be applied to other types of Level A impermeable PPE.

• 대한물리의학회지
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• 제14권3호
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• pp.13-20
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• 2019

PURPOSE: Sitting with crossed legs may have an effect on maintaining a healthy body posture and proper functioning of the respiratory system. Thus, this study's objective was to identify whether or not sitting with crossed legs affects the vertebral angle, chest wall mobility, the pulmonary function, and the activity of the respiratory muscles. METHODS: Thirty healthy subjects were recruited for this study (16 males and 14 females). The vertebral angle, chest wall mobility, pulmonary function, and the activity of the respiratory muscle were measured while the subjects sat in the correct posture and these factors were again measured with the subjects seated with their legs crossed. Three-dimensional motion analysis was used to determine the trunk and lumbar vertebral angles. Surface electromyography was employed to measure the sternocleidomastoid, the rectus abdominis, and the external and internal oblique abdominis muscles. A tapeline was utilized to evaluate the subjects' chest wall mobility. Spirometry was assessed to determine the forced vital capacity and forced expiratory volume in one second. Paired t-tests were then performed (p<.05). RESULTS: There were significant differences in the trunk and lumbar flexion angles, the chest wall mobility, the activity of the right external oblique muscle, and the left internal oblique abdominis muscle. However, the difference in pulmonary function did not reach statistical significance. CONCLUSION: A crossed leg posture caused slight thoracic extension and lumbar flexion, which may lead to a decrease of the chest wall mobility and also to an imbalance of the abdominal muscles. Therefore, sitting with a crossed leg posture should be avoided. Yet a crossed leg posture did not have any clinical effect on the pulmonary function of healthy people. It may be necessary to study the effects of sitting with crossed legs over an extended period of time for patients suffering with impaired respiratory function.

• 가정간호학회지
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• 제8권1호
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• pp.25-37
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• 2001

Spinal cord injury patients need rehabilitation after the acute stage. They should be cared for at home to decrease hospitalization. Home care nurses play an important role in making spinal cord injury patients who have physical. and psychosocial problems do their best. For effective care, home care nurses need standardized nursing intervention protocols for spinal cord injury patients, but they are rarely developed. Therefore, this study was conducted to develop home care nursing protocols, based on NIC, that are applicable to spinal cord injury patients at home. Forty home care nursing charts of spinal cord injury patients registered in a home care nursing agency from July 1st, 1994 to August 31st, 1999 in S city were analyzed. Fifteen home care nurses participated in this study as a user validity validation group, The results of this study are as follows. 1. Fifteen nursing diagnoses were classified through the frequency analysis of home care nursing charts and previous literature for 40 spinal cord injury patients: altered urinary elimination, constipation, high risk for impaired skin integrity, chronic pain, impaired skin integrity, impaired social interaction, knowledge deficit, bowel incontinence, high risk for injury, altered role performance, care giver role strain, impaired physical mobility, sexual dysfunction, dysreflexia, and ineffective breathing pattern. 2. Based on validation by experts and user validities, 93 nursing interventions which were above ICV(Index of Content Validity) .80 were chosen. 3. Nursing intervention protocols which showed above ICV .80 were developed.

• The Journal of Korean Physical Therapy
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• 제22권3호
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• pp.37-44
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• 2010

Purpose: The purpose of this study was to describe the functional (mobility, self-care, social ability) and health-related quality of life in children with cerebral palsy (CP). Methods: A cross- sectional survey of 202 children with CP, mean age $5.91{\pm}1.57$ years, was carried out using the Gross Motor Function Classification System (GMFCS), Gross Motor Function Measure (GMFM), Pediatric Evaluation of Disability Inventory (PEDI), and Child Health Questionnaire (CHQ). Results: The functional assessment of children with CP showed that a more severe GMFCS level was associated with lower functional abilities (p<0.05). The health-related quality of life assessment showed that psychosocial well-being was less impaired than physical well-being. The internal consistency of the three instruments was satisfactory (cronbach's ${\alpha}$>0.80). The three different scales were correlated from moderate to strong (r=0.44 to 0.92). It was also found that mobility, tone distribution, and the parents' education level exerted a significant effect on the quality of life of children with CP (p<0.05). Conclusion: These findings suggest that children with CP have reduced function and quality of life and these are influenced by various factors. However, planning and application of various task-oriented functional interventions to childhood CP may be useful.

• 대한간호
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• 제33권3호
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• pp.79-91
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• 1994

The purpose of this study was to identify the meaningful nursing diagnosis in maternity unit and to suggest formally the basal data to the nursing service with scientific approach. The subject for this paper were 64 patients who admitted to Chung Ang University Hospital, Located in Seoul, from Mar. 10, to July 21, 1993. The results were as follows: 1. The number of nursing diagnosis from 64 patients were 892 and average number of nursing diagnosis per patient was 13.9. 2. Applying the division of nursing diagnosis to Roy's Adaptation Model, determined nursing diagnosis from the 64 patients were 621 (69.6%) in physiological adaptation mode and (Comfort, altered r/t), (Injury, potential for r/t), (Infection, potential for r/t), (Bowel elimination, altered patterns r/t), (Breathing pattern, ineffective r/t), (Nutrition, altered r/t less than body requirement) in order, and 139 (15.6%) in role function mode, (Self care deficit r/t), (Knowledge deficit r/t), (Mobility, impaired physical r/t) in order, 122 (13.7%) in interdependence adaptation mode, (Anxiety r/t), (Family Process, altered r/t) in order, 10(1.1%) in self concept adaptation mode, (Powerlessness r/t), (Grieving, dysfunctional r/t) in order. 3. Nursing diagnosis in maternity unit by the medical diagnosis, the average hospital dates were 3.8 days in normal delivery and majority of used nursing diagnosis, (Comfort, altered r/t) 64.6%, (Self care deficit r/t) 13.6% in order, and the average hospital dates were 9.6 days in cesarean section delivery and majority of used nursing diagnosis, (Comfort, altered r/t) 51.6%, (Self care deficit r/t) 15.2%, (Infection, potential for r/t) 9.9%, (Injury, potential "for r/t) 8.1%, (Anxiety r/t) 5.0%, (Mobility, impaired physical r/t) 3.3% in order, and the average hospital dates were 15.8days in preterm labor and majority of used nursing diagnosis, (Comfort, altered r/ t), (Anxiety r/t), (Injury, potential for r/t) in order, and the average short-term hospital dates were 2.5days, long-term hospital dates were 11.5days in gynecologic diseases and majority of used nursing diagnosis, (Comfort, altered r/t). (Self care deficit r/t), (Injury, potential for r/t), (Infection, potential for r/t) in order.

• 대한물리의학회지
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• 제13권2호
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• pp.75-87
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• 2018

PURPOSE: The purpose of this study was to describe and analyze the components of physical therapy interventions to enhance postural control and mobility in children with spastic diplegia. METHODS: Thirsty-eight physical therapists working in rehabilitation settings volunteered to record the components of physical therapy interventions used during 894 treatment sessions for 179 children with spastic diplegia presenting with difficulties in postural control and mobility. Descriptive statistics were used to analyze the general characteristics of the therapists, the patients, and the frequency of the interventions. A one-way analysis of variance (ANOVA) and chi-square test were used to describe the components of the interventions and the goals of treatment. RESULTS: In clinical practice, physical therapists primarily used methods including "Hands-on: facilitation" (n=1990, 36.47%) and "Hands-off: practice" (n=1355, 24.83 %). Only 13.96% (n=762) of the interventions allowed patients to be independent or active outside of the treatment sessions. Interventions reflecting the therapeutic aims were performed for sitting (17.53%), standing (18.25%), and walking (27.39%). CONCLUSION: Physical therapists mostly used "therapistled" interventions to treat impaired postural control and mobility in children with spastic diplegia. Interventions to facilitate independent activity or practice outside the treatment sessions are infrequently used. These types of interventions were used regardless of the aims of treatment.

• 대한간호학회지
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• 제31권5호
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• pp.749-758
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• 2001

The purpose of the study was to analyze the functional status of low income elderly living at home according to their socio-economic factors, sensory function, health status, medical service utilization, commodity and types of chronic disease. Method: Functional status was defined by the level of mobility, ADL and IADL categorized as independently functional, mildly impaired, moderately disabled, and severely disabled. The data was collected by home-visit interviews with 567 community dwelling adults who were 65 years of age or more with low a income status subsidized by government in ChonAn. Results: 9.9% of community dwelling older adults were severely disabled, and 44.4% were moderately disabled in their functional status. There were significant differences in the functional status by age, education, religion, and types of family structure. The older adults with hearing impairment or dental problems had a significantly higher rate of severe disability. Self-rated health status and medical service utilization were also significant factors to the differences in functional status. The functional status of older adults was also significantly related to the presence of chronic health problems such as chronic back pain, stroke, and Alzheimer-dementia. Conclusion: The results confirmed that community dwelling older adults with low income status were more functionally disabled in comparison to general older adults at national level, while the relating factors to their functional status seemed similar to other studies on older adults. Further studies were suggested to look into functional status longitudinally and focus on the changes of functional status by managing modifiable influencing factors.