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MBus: A Fully Synthesizable Low-power Portable Interconnect Bus for Millimeter-scale Sensor Systems
Lee, Inhee,Kuo, Ye-Sheng,Pannuto, Pat,Kim, Gyouho,Foo, Zhiyoong,Kempke, Ben,Jeong, Seokhyeon,Kim, Yejoong,Dutta, Prabal,Blaauw, David,Lee, Yoonmyung The Institute of Electronics and Information Engin 2016 Journal of semiconductor technology and science Vol.16 No.6
This paper presents a fully synthesizable low power interconnect bus for millimeter-scale wireless sensor nodes. A segmented ring bus topology minimizes the required chip real estate with low input/output pad count for ultra-small form factors. By avoiding the conventional open drain-based solution, the bus can be fully synthesizable. Low power is achieved by obviating a need for local oscillators in member nodes. Also, aggressive power gating allows low-power standby mode with only 53 gates powered on. An integrated wakeup scheme is compatible with a power management unit that has nW standby mode. A 3-module system including the bus is fabricated in a 180 nm process. The entire system consumes 8 nW in standby mode, and the bus achieves 17.5 pJ/bit/chip.
A Wire-overhead-free Reset Propagation Scheme for Millimeter-scale Sensor Systems
Lee, Inhee,Bang, Suyoung,Kim, Yejoong,Kim, Gyouho,Sylvester, Dennis,Blaauw, David,Lee, Yoonmyung The Institute of Electronics and Information Engin 2017 Journal of semiconductor technology and science Vol.17 No.4
This paper presents a novel reset scheme for mm-scale sensing systems with stringent volume and area constraints. In such systems, multi-layer structure is required to maximize the silicon area per volume and minimize the system size. The multi-layer structure requires wirebonding connections for power delivery and communication among layers, but the area overhead for wirebonding pads can be significant. The proposed reset scheme exploits already existing power wires and thus does not require additional wires for system-wide reset operation. To implement the proposed reset scheme, a power management unit is designed to impose reset condition, and a reset detector is designed to interpret the reset condition indicated by the power wires. The reset detector uses a coupling capacitor for the initial power-up and a feedback path to hold the developed supply voltage. The prototype reset detector is fabricated in a $180-{\mu}m$ CMOS process, and the measurement results with the prototype mm-scale system confirmed robust reset operation over a wide range of temperatures and voltages.
MBus : A Fully Synthesizable Low-power Portable Interconnect Bus for Millimeter-scale Sensor Systems
Inhee Lee,Ye-Sheng Kuo,Pat Pannuto,Gyouho Kim,Zhiyoong Foo,Ben Kempke,Seokhyeon Jeong,Yejoong Kim,Prabal Dutta,David Blaauw,Yoonmyung Lee 대한전자공학회 2016 Journal of semiconductor technology and science Vol.16 No.6
This paper presents a fully synthesizable low power interconnect bus for millimeter-scale wireless sensor nodes. A segmented ring bus topology minimizes the required chip real estate with low input/output pad count for ultra-small form factors. By avoiding the conventional open drain-based solution, the bus can be fully synthesizable. Low power is achieved by obviating a need for local oscillators in member nodes. Also, aggressive power gating allows low-power standby mode with only 53 gates powered on. An integrated wakeup scheme is compatible with a power management unit that has nW standby mode. A 3-module system including the bus is fabricated in a 180 nm process. The entire system consumes 8 nW in standby mode, and the bus achieves 17.5 pJ/bit/chip.
A Wire-overhead-free Reset Propagation Scheme for Millimeter-scale Sensor Systems
Inhee Lee,Suyoung Bang,Yejoong Kim,Gyouho Kim,Dennis Sylvester,David Blaauw,Yoonmyung Lee 대한전자공학회 2017 Journal of semiconductor technology and science Vol.17 No.4
This paper presents a novel reset scheme for mm-scale sensing systems with stringent volume and area constraints. In such systems, multi-layer structure is required to maximize the silicon area per volume and minimize the system size. The multi-layer structure requires wirebonding connections for power delivery and communication among layers, but the area overhead for wirebonding pads can be significant. The proposed reset scheme exploits already existing power wires and thus does not require additional wires for system-wide reset operation. To implement the proposed reset scheme, a power management unit is designed to impose reset condition, and a reset detector is designed to interpret the reset condition indicated by the power wires. The reset detector uses a coupling capacitor for the initial power-up and a feedback path to hold the developed supply voltage. The prototype reset detector is fabricated in a 180-μm CMOS process, and the measurement results with the prototype mm-scale system confirmed robust reset operation over a wide range of temperatures and voltages.
Jieun Kim,YoonMyung Kim,Young-Gyun Seo,Kyung-Hee Park,Han Byul Jang,Hye-Ja Lee,Sang Ick Park,Hyunjung Lim 대한지역사회영양학회 2020 Nutrition Research and Practice Vol.14 No.3
BACKGROUND/OBJECTIVES: Evidence-based customized nutritional interventions are required for effective treatment of moderate to severe obese children and adolescents. SUBJECTS/METHODS: Sixty six (64.1% of 103) of the eligible participants who joined the usual care or physical activity group in the clinic were involved in 16-week intervention. Customized nutritional intervention was implemented for each participant based on a nutrition care process (NCP) model. Sociodemographic assessment, anthropometrics data, health- and dietary-related behaviors, and dietary intake of the study subjects were assessed at baseline and follow-up. All participants engaged in 30-minute nutritional sessions on a monthly basis. RESULTS: After 16 weeks, there were significant improvements in body composition [BMI(-0.8 ± 0.9, P < 0.05), BMI z-score (-0.3 ± 0.2, P < 0.001), body fat (kg) (-1.3 ± 2.1, P < 0.05), and body fat (%)(-1.5 ± 1.9, P < 0.05)] as well as macronutrient intake [total energy intake (kcal) (-563.7 ± 656.8, P < 0.05), energy (%) (-26.5 ± 30.0, P < 0.05) and fat (g) (-28.3 ± 40.6, P < 0.05)] in the adherent group than the non-adherent group. The SOC was higher in both groups after the intervention (P < 0.001). CONCLUSIONS: Our results highlight the positive effects of an evidence-based approach as a multidisciplinary intervention for people-centered nutritional care and weight management.
Effect of a short-term physical activity intervention on liver fat content in obese children
Kang, Dong-Woo,Park, Ji-Hye,Lee, Mi Kyung,Kim, YoonMyung,Kong, In Deok,Chung, Choon Hee,Lee, Young Hee,Jeon, Justin Y. NATIONAL RESEARCH COUNCIL OF CANADA 2018 APPLIED PHYSIOLOGY NUTRITION AND METABOLISM Vol.43 No.6
<P> Nonalcoholic fatty liver disease is the most common chronic liver disease and can present with advanced fibrosis or nonalcoholic steatohepatitis. The purpose of this study was to investigate the effect of a 7-day intense physical activity intervention on liver fat content in children with obesity. Fifty-seven obese children (mean body mass index: 26.5 ± 3.2 kg/m<SUP>2</SUP>; mean age: 12.0 ± 0.8 years) participated in a 7-day physical activity program. All participants were housed together, and their food intake and energy expenditure were strictly controlled. Anthropometric measurements, abdominal computerized tomography scans, and blood analyses were conducted at baseline and post-intervention. Participants lost weight by 2.53 ± 0.85 kg on average (61.0 ± 9.8 vs. 58.5 ± 9.5 kg, p @@<@@ 0.05), fat mass (16.7 ± 5.1 vs. 15.7 ± 4.9 kg, p @@<@@ 0.05), and serum insulin (13.7 ± 6.7 vs. 3.5 ± 2.0 μU/mL, p @@<@@ 0.05). However, liver fat content was increased, presented as liver-to-spleen ratio (LSR) where lower LSR represents higher liver fat content. The intervention increased aspartate transaminase level (29.42 ± 6.78 IU/L vs. 33.50 ± 9.60 IU/L, p @@<@@ 0.001). The change in liver fat content was not associated with the change in fasting insulin and liver enzymes. Short-term intense physical activity increased liver fat content independent of change in fasting insulin level and liver enzymes. This is the first human study to report increased liver fat content after physical activity-induced rapid weight loss. </P>
소아청소년 체중상태에 따른 식사의 질 평가 및 비만과의 연관성 분석
양시원 ( See-won Yang ),이향숙 ( Hyang-suk Lee ),김지은 ( Jieun Kim ),김윤명 ( Yoonmyung Kim ),서영균 ( Young-gyun Seo ),박경희 ( Kyung Hee Park ),장한별 ( Han Byul Jang ),이혜자 ( Hye-ja Lee ),박상익 ( Sang Ick Park ),임현정 ( Hy 대한영양사협회 2017 대한영양사협회 학술지 Vol.23 No.3
Numerous studies have investigated quantifying dietary intake according to the weight status of children and adolescents. However, studies on differences in quality among diets remain scarce. This study compared diet quality by weight status and examined correlations between quality of diet and obesity in children and adolescents. Two hundred fourteen children and adolescents aged between 9 and 18 years participated in this study (Normal weight n=104, Obesity n=110). The data related to food intake were investigated by dietary records, Diet Quality Index-International (DQI-I), and Nutrition Quotient (NQ) and then compared with Dietary Reference Intakes for Korean (KDRIs). In DQI-I, moderation factor (control of unhealthy foods) score was 21.7 in the normal weight group and 19.5 in the obesity group. The normal weight group showed a higher score for moderation factor than the obesity group (P<0.001). Compared with KDRIs, vitamin B6, folate, vitamin C, vitamin E, calcium, potassium, and zinc intakes were insufficient in both groups. Multiple logistic regression analysis revealed that DQI-I moderation was negatively associated with obesity (OR=0.77, 95% CI 0.69-0.87) after adjustment for age, gender, income, and total energy intake. Our results suggest that children and adolescents require nutritional education to understand the importance of vitamin and mineral consumption. Especially, education for children and adolescents with obesity needs to emphasize moderation of nutrient intake that can cause diseases with hyper-ingestion such as sodium and high calorie-low nutrition foods.