• Journal of Korean society of Dental Hygiene
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• v.22 no.2
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• pp.133-142
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• 2022

Objectives: This study was conducted by clinical dentistry hygienists to develop knowledge measurement tools and evaluate knowledge necessary to cope with emergencies related to systemic diseases occurring in dentistry. Methods: Basic questions were developed on the six most frequently occurring diseases in the dental office: diabetes, syncope, respiratory disease, coronary artery disease, cerebrovascular disease, and epilepsy. Fifty-eight preliminary questions were composed in a survey format through expert validation. The survey was then conducted on 290 dental hygienists to verify the composition validity and reliability. Factor and reliability analyses were performed using the SPSS 23.0 program, and the correct answer rate for each question was calculated. Results: 49 items of a total of 13 factors were adopted as the final items for signs, symptoms, prevention and treatment of five diseases. The question with the highest percentage of correct answers for each question was "Slowly set up the unit chair when raising the patient"(97.9%) during the prevention of unconsciousness and question with the lowest correct answer rate was "soft substances such as cloth should be put in the mouth to prevent trauma while the seizure persists" (16.6%). Conclusions: A total of 49 questions have been developed as tools to measure the knowledge of dental hygienists' first aid related to systemic diseases and it is expected that related curriculum can be operated or evaluated by using them.

• Journal of Korean society of Dental Hygiene
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• v.22 no.4
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• pp.273-280
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• 2022

Objectives: This study aimed to investigate the perception of dental infection-control coordinator (DICC) among dental hygienist and determine whether there is a difference in perception depending on the type of work. Methods: Dental hygienists working at the dentistry were conveniently extracted and distributed to 351 patients, and the data of 320 patients were finally analyzed. The chi-square test was conducted to determine the difference in perception of the DICC according to the type of work, and the one-way ANOVA was performed to determine the difference in the perception of DICC tasks. A p-value of <0.05 was statistically significant. Results: General hospitals and university hospitals (100%), dental hospitals (95.8%), and dental clinics (86.6%) showed the highest awareness of the need for DICC. The dental clinics had the lowest level of awareness regarding the duties of the DICC, and dental hospitals and clinics were in different areas with different levels of awareness regarding infection control-related administrative support areas (3.98-4.21 and 3.79-4.12 of 5). Conclusions: Because of a difference in perception regarding the work of DICC according to the type of work, dental organizations should establish the tasks of DICC and develop an education program for a person in charge based on this.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.46 no.1
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• pp.23-31
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• 2023

Research and interest in sustainable printing are increasing in the packaging printing industry. Currently, predicting the amount of ink required for each work is based on the experience and intuition of field workers. Suppose the amount of ink produced is more than necessary. In this case, the rest of the ink cannot be reused and is discarded, adversely affecting the company's productivity and environment. Nowadays, machine learning models can be used to figure out this problem. This study compares the ink usage prediction machine learning models. A simple linear regression model, Multiple Regression Analysis, cannot reflect the nonlinear relationship between the variables required for packaging printing, so there is a limit to accurately predicting the amount of ink needed. This study has established various prediction models which are based on CART (Classification and Regression Tree), such as Decision Tree, Random Forest, Gradient Boosting Machine, and XGBoost. The accuracy of the models is determined by the K-fold cross-validation. Error metrics such as root mean squared error, mean absolute error, and R-squared are employed to evaluate estimation models' correctness. Among these models, XGBoost model has the highest prediction accuracy and can reduce 2134 (g) of wasted ink for each work. Thus, this study motivates machine learning's potential to help advance productivity and protect the environment.

• Design Convergence Study
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• v.16 no.6
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• pp.123-135
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• 2017

In recent mobile health care service, health management using number of steps is becoming popular. In addition, a variety of activity trackers have made it possible to measure the number of steps more accurately and easily. Nevertheless, the activity tracker is not popularized, and it is a trend to use the pedometer sensor of the smartphone as an alternative. In this study, we tried to find out how much the number of steps collected by the smartphone versus the actual number of steps in actual situations, and what factors make the difference. We conducted an experiment to collect number of steps data of 21 people using the smartphone and wearable device simultaneously for 7 days. As a result, we found that the average number of steps of the smartphone is 62% compared to the actual number of steps, and that there is a large variation among users. We derived a regression model in which the accuracy of smartphone increases with the degree of awareness of smartphone. We expect that this can be used as a factor to correct the difference from the actual number of steps in the smartphone alone healthcare service.

• Electronics and Telecommunications Trends
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• v.24 no.5
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• pp.20-29
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• 2009

디지털 의류는 디지털 기술이 의류에 자연스럽게 융합되면서 옷을 입은 사람뿐만 아니라 외부의 디지털 기기와도 자유로운 소통이 가능한 의류이다. 1990년 후반부터 유럽과 미국에서는 섬유기술에 IT 기술을 융합하는 연구가 계속되고 있으며, 직물부품 및 직물회로를 구현하여 의류에 적용한 바 있다. 초기 디지털 의류는 군복과 같은 특수용도로 개발되었으나 요즘에는 MP3 플레이어 내장 의류, 색깔이 변하는 의류, 헬스케어 의류 등 일상생활용도의 의류가 개발되는 추세이다. 디지털 의류는 신소재 산업, 센서 산업 등 기술 집약 산업의 활성화는 물론, 기존 전통 산업에 IT 기술을 접목함으로써 섬유, 패션, 의류산업의 확장과 활성화에 큰 역할을 할 것으로 전망된다. 앞으로 우리나라가 디지털 의류 시장을 선도하기 위해서는 섬유 IT 및 의류 IT융합 핵심기술의 확보가 시급하다. 본 고에서는 섬유 IT 융합분야의 이해를 높이고자 디지털 의류 기술 개발의 동향을 살펴보고 향후 기술발전 방향을 전망해 보고자 한다.

• Therapeutic Science for Rehabilitation
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• v.10 no.3
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• pp.97-110
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• 2021

Objective : This study aimed to develop evaluation items based on Parten's social play developmental stages to measure social play in preschool children. Methods : Through a literature review, the investigation items according to Parten's social play developmental stages were collected. Two Delphi surveys were conducted using 22 expert panels. An understanding of the contents of the preliminary items was determined via parents of preschool children. The evaluation method was established through an expert advisory meeting. Results : Through data collection and the Delphi survey, a total of 89 items were drawn, including 12 unoccupied behaviors, 7 onlooker behaviors, 14 solitary play, 16 parallel play, 17 associative play, and 23 cooperative play items. The average content validity ratio of the Delphi survey was 0.85. The stability was 0.15. The consensus was 0.78. The final preliminary evaluation items comprised a total of 40 items, including 17 for associative play and 23 for cooperative play. Conclusion : An evaluation items that can measure social play in preschool children was developed, and its content validity was verified. It is expected to be used as an evaluation tool in clinical practice.

• Journal of Biomedical Engineering Research
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• v.43 no.1
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• pp.11-18
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• 2022

An electromagnetic generator with variable stimulation parameters is required to conduct basic research on magnetic flux density and frequency for pulsed electromagnetic fields (PEMFs). In this study, we design an electromagnetic generator that can conduct basic research by providing parameters optimized for cell and animal experimental conditions through adjustable stimulation parameters. The magnetic core was selected as a solenoid capable of uniform and stable electromagnetic stimulation. The solenoid was designed in consideration of the experimental mouse and cell culture dish insertion. A voltage and current adjustable power supply for variable magnetic flux density was designed. The system was designed to be adjustable in frequency and pulse width and to enable 3-channel output. The reliability of the system and solenoid was evaluated through magnetic flux density, frequency, and pulse width measurements. The measured magnetic flux density was expressed as an image and qualitatively observed. Based on the acquired image, the stimulation area according to the magnetic flux density decrease rate was extracted. The PEMF frequency and pulse width error rates were presented as mean ± SD, and were confirmed to be 0.0928 ± 0.0934% and 0.529 ± 0.527%, respectively. The magnetic flux density decreased as the distance from the center of the solenoid increased, and decreased sharply from 60 mm or more. The length of the magnetic stimulation area according to the degree of magnetic flux density decrease was obtained through the magnetic flux density image. A PEMF generator and stimulation parameter control system suitable for cell and animal models were designed, and system reliability was evaluated.

• Therapeutic Science for Rehabilitation
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• v.11 no.3
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• pp.51-64
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• 2022

Objective : The purpose of this study is to establish the domain for assessment of feeding disorder with cerebral palsy. In addition, it is to develop item on feeding assessment for feeding disorder on children with cerebral palsy Methods : Factors to be included in the assessment of feeding disorders in children with cerebral palsy based on the ICF classification criteria constituted the assessment domain through literature review. Results : Assessment items of feeding disorders in children with cerebral palsy were categorized into 6 domains. These were systematized through expert advice, and through the first and second Delphi surveys, nine middle categories, 32 sub-categories, and 76 items were confirmed. Conclusions : The results of this study are useful for occupational therapists who want to check the current feeding function and activity level during therapeutic interventions for children with cerebral palsy who have feeding disorders.

• Korean Journal of Clinical Laboratory Science
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• v.55 no.1
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• pp.37-44
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• 2023

Enterotoxigenic Bacteroides fragilis (ETBF) has been reported to promote colitis and colon cancer through the secretion of B. fragilis toxin (BFT), a zinc-dependent metalloprotease. In colonic epithelial cells, BFT induces the cleavage of E-cadherin into the 80 kDa ectodomain and the 33 kDa membrane-bound intracellular domain. The resulting membrane-tethered fragment is then cleaved by γ-secretase forming the 28 kDa E-cadherin intracellular fragment. The 28 kDa cytoplasmic fragment is then degraded by an unknown mechanism. In this study, we found that the 28 kDa E-cadherin intracellular fragment was degraded by the proteasome complex. In addition, we found that this sequential E-cadherin cleavage mechanism is found not only in colonic epithelial cells but also in the human breast cancer cell line, BT-474. Finally, we report that staurosporine also induces E-cadherin cleavage in the human breast cancer cell line, MCF7, through γ-secretase. However, further degradation of the 28 kDa E-cadherin intracellular domain is not dependent on the proteasome complex. These results suggest that the BFT-induced E-cadherin cleavage mechanism is conserved in both colonic and breast cancer cells. This observation indicates that ETBF may also play a role in the carcinogenesis of tissues other than the colon.

• Therapeutic Science for Rehabilitation
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• v.11 no.1
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• pp.49-68
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• 2022

Objective : This study aimed to conduct a Delphi survey of occupational therapists with experience in elderly occupational therapy to derive items about the 'Elder Leisure Value Assessment Tool'. Methods : This study was conducted in two stages. The first stage was the collection of preliminary questions, and the second stage was the Delphi survey. In the first stage, a literature review and analysis of the 2019 National Leisure Activity Survey were conducted. The modified Delphi technique of the Delphi investigation was implemented in two rounds. Results : In the preliminary item collection phase, 39 items were selected for leisure value assessment and 45 were listed for the participating leisure activities. Subsequently, a Delphi survey of 25 professional groups resulted in 38 leisure value assessment items and 45 participating leisure activities. Conclusion : The questions drawn from this study are meaningful because they can identify specific leisure activities that the elderly participate in, as well as the various values that the elderly consider important when participating in such activities