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Article ; Online: Design of an Agrivoltaic System with Building Integrated Photovoltaics

Kim, Sojung / Kim, Sumin

Agronomy. 2023 Aug. 16, v. 13, no. 8

2023

Abstract: Building integrated photovoltaics (BIPVs) are becoming popular as building elements such as windows, roofs, and outer walls. Because BIPVs have both a construction material function and an electricity generation function, they are a promising alternative ...

Abstract	Building integrated photovoltaics (BIPVs) are becoming popular as building elements such as windows, roofs, and outer walls. Because BIPVs have both a construction material function and an electricity generation function, they are a promising alternative to sustainable buildings. This study aims to propose a novel agrivoltaic system design that produces crops underneath photovoltaic (PV) modules. Regarding the fact that crop growth is significantly influenced by shading from PV modules, roof BIPVs with different shading ratios can lead to increased crop productivity. Thus, BIPV design should be investigated based on the performance estimation and feasibility evaluation of different shading ratios in an agrivoltaic system. To this end, electricity generation and crop production models are devised by polynomial regression (PR) based on field experiment data collected from the agrivoltaic system at the Agricultural Research Service Center in Naju-si, South Korea. The experiment shows that a shading ratio of 30% allows for the maximization of the profitability of electricity and soybean production in an agrivoltaic system equipped with BIPVs. As a result, this research will contribute to implementing an agrivoltaic system with various BIPVs.
Keywords	Agricultural Research Service ; agrivoltaic systems ; agronomy ; construction materials ; crop production ; electricity ; electricity generation ; field experimentation ; profitability ; regression analysis ; solar energy ; soybeans ; systems engineering ; South Korea
Language	English
Dates of publication	2023-0816
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article ; Online
ZDB-ID	2607043-1
ISSN	2073-4395
ISSN	2073-4395
DOI	10.3390/agronomy13082140
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Synergistic approaches to elevate indoor air quality: A holistic examination of classroom refinement, air exchange optimization, and flooring material impact.

Jo, Ho Hyeon / Kang, Yujin / Kim, Sumin

Environmental pollution (Barking, Essex : 1987)

2024 Volume 349, Page(s) 123920

Abstract: This research endeavors to elevate indoor air quality within aging school environments by concentrating on refining interior finishing materials and windows. Renovations, encompassing window and floor remodeling in classrooms, aim to mitigate particulate ...

Abstract	This research endeavors to elevate indoor air quality within aging school environments by concentrating on refining interior finishing materials and windows. Renovations, encompassing window and floor remodeling in classrooms, aim to mitigate particulate matter (PM) infiltration and enhance air exchange rates. Utilizing SPS30 sensors for the analysis of 0.3-2.5 μm particles, with a focus on their implications for human health, the study evaluated air exchange rates, deposition rates, infiltration rates, and particle generation during classroom activities. Post-renovation results demonstrated a noteworthy decrease in air exchange rates, indicating an enhancement in airtightness. The investigation delves into particle generation with various flooring materials, accentuating the importance of opting for durable and low-particle-generating alternatives. Health risk assessments, considering multiple exposure routes (inhalation, dermal contact, and ingestion), revealed reduced risks post-renovation, particularly for children. To further optimize indoor air quality, the study suggests the implementation of air purification systems. Examination of PM generation during student activities showcased a substantial reduction post-renovation. This study underscores the positive influence of architectural enhancements on indoor air quality while acknowledging the necessity for holistic solutions and continuous research.
MeSH term(s)	Air Pollution, Indoor/statistics & numerical data ; Air Pollution, Indoor/analysis ; Schools ; Particulate Matter/analysis ; Humans ; Floors and Floorcoverings ; Environmental Monitoring/methods ; Air Pollutants/analysis
Chemical Substances	Particulate Matter ; Air Pollutants
Language	English
Publishing date	2024-04-04
Publishing country	England
Document type	Journal Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2024.123920
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Article: CO2 emission and construction cost reduction effect in cases of recycled aggregate utilized for nonstructural building materials in South Korea

Shin, Bigyeong / Kim, Sumin

Journal of cleaner production. 2022 Aug. 01, v. 360

2022

Abstract: The construction industry is a major consumer of natural resources and a major waste generator. The use of recycled aggregate is important for the environmental sustainability of the construction industry because it can not only reduce the need for waste ...

Abstract	The construction industry is a major consumer of natural resources and a major waste generator. The use of recycled aggregate is important for the environmental sustainability of the construction industry because it can not only reduce the need for waste landfills, but can also reduce the depletion of natural aggregates. Although there are many studies on the environmental effects of recycled aggregate, there are few studies on its practical effects as applied to real buildings. Recycled aggregates have not been widely used owing to a lack of user trust. Generally RCA has been commonly used in nonstructural materials (such as pavements or filling materials) owing to its inherent properties. Due to inferior characteristics of RCA, there is a limit to being widely used as a structural material immediately. Therefore, to expand the use of recycled aggregate, it is necessary to study the economic and environmental benefits from using recycled aggregate as a nonstructural material for buildings. In this study, the cost and potential embodied CO₂ (ECO₂) emission benefits were analyzed by using recycled aggregates as the nonstructural materials in four types of buildings, including apartments with 31 different characteristics. When applied RCA to the apartments, the cost savings are -$122,057 which is 10% reduction compared to original material. And the ECO₂ emissions cost savings amount to -$2,958 which is 5% reduction compared to original material; these represent the most effective case and reflect a −0.158% change in the total construction cost.
Keywords	carbon dioxide ; construction industry ; cost effectiveness ; environmental sustainability ; South Korea
Language	English
Dates of publication	2022-0801
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2022.131962
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Article ; Online: An integrated agent-based simulation modeling framework for sustainable production of an Agrophotovoltaic system

Kim, Youngjin / Kim, Sumin / Kim, Sojung

Journal of Cleaner Production. 2023 Sept., v. 420 p.138307-

2023

Abstract: The Agrophtovoltaic (APV) system is an alternative for sustainable crop production, where solar power is generated via Photovoltaic (PV) modules. Since both crop production and solar power generation activities are heavily dependent on dynamic ... ...

Abstract	The Agrophtovoltaic (APV) system is an alternative for sustainable crop production, where solar power is generated via Photovoltaic (PV) modules. Since both crop production and solar power generation activities are heavily dependent on dynamic environmental conditions, it is challenging to design an APV system based on accurate estimation of its performance. To this end, this study aims to introduce an agent-based simulation (ABS) framework integrated with polynomial regression and ridge regression. In particular, two agent types are devised, as follow: (1) The photovoltaic agent calculates electricity produced via PV modules, and estimates its profits; and (2) the crop production agent calculates crop harvests underneath the PV modules, and estimates their profits. To validate the proposed framework, field experiment data with five types of crops (i.e., corn, sesame, soybean, mung bean, and red bean) at the APV system at Jeollanam-do Agricultural Research and Extension Services in South Korea with three different shading ratios of 21.3%, 25.6%, and 32.0% have been used. In addition, for the sustainable operation of an APV system in terms of electricity generation as well as crop production, three climate change scenarios based on the shared socioeconomic pathway (SSP) are considered. The proposed framework identifies that the agrophotovoltaic system with 32% sharing ratio increases up to 20% of the total profit of normal farmland. As a result, the proposed framework enables the performance of an APV system under dynamic climate conditions to be accurately estimated, so that APV system designers can utilize it to identify a profitable long-term APV system.
Keywords	agricultural land ; agricultural research ; climate ; climate change ; corn ; crop production ; electricity ; electricity generation ; field experimentation ; mung beans ; power generation ; red beans ; regression analysis ; solar energy ; soybeans ; sustainable agriculture ; South Korea ; Agent-based modeling ; Agrophotovoltaic ; ALMANAC ; Renewable energy ; Simulation
Language	English
Dates of publication	2023-09
Publishing place	Elsevier Ltd
Document type	Article ; Online
ISSN	0959-6526
DOI	10.1016/j.jclepro.2023.138307
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Article ; Online: Otogenic Enterobacter cloacae meningitis complicated with pneumocephalus.

Lee, Sorae / Kim, Sumin / Sunwoo, Jun-Sang

Encephalitis (Seoul, Korea)

2023 Volume 3, Issue 4, Page(s) 125–128

Abstract: Pneumocephalus refers to a pathologic collection of gas within the cranial cavity and is mostly caused by head trauma and neurosurgical procedures. Spontaneous nontraumatic pneumocephalus is a very rare condition. We herein report an unusual case of ... ...

Abstract	Pneumocephalus refers to a pathologic collection of gas within the cranial cavity and is mostly caused by head trauma and neurosurgical procedures. Spontaneous nontraumatic pneumocephalus is a very rare condition. We herein report an unusual case of community-acquired bacterial meningitis with a combination of acute otitis media, Enterobacter cloacae, and nontraumatic pneumocephalus. A 75-year-old woman presented with fever, mental change, and neck stiffness. Brain imaging demonstrated pneumocephalus and fluid collection in the left mastoid air cells. E. cloacae was isolated from both blood and otorrhea cultures, and the patient was successfully treated with intravenous ceftazidime for 3 weeks. Although E. cloacae is a very rare cause of community-acquired bacterial meningitis in adults, it should be considered as a possible pathogen in otogenic meningitis complicated with pneumocephalus.
Language	English
Publishing date	2023-09-25
Publishing country	Korea (South)
Document type	Case Reports
ISSN	2734-1461
ISSN (online)	2734-1461
DOI	10.47936/encephalitis.2023.00164
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Who are the key players? Listeners vs spreaders vs others.

Kim, Sumin / Lee, Kyu-Min / Shin, Euncheol

PloS one

2023 Volume 18, Issue 5, Page(s) e0286369

Abstract: The literature on social learning examines how people learn from their neighbors and reach a consensus. The DeGroot social learning model describes the social learning process as one in which people form their opinions by taking a weighted average of ... ...

Abstract	The literature on social learning examines how people learn from their neighbors and reach a consensus. The DeGroot social learning model describes the social learning process as one in which people form their opinions by taking a weighted average of their neighbors' opinions. In the model, the influence structure is represented by a single matrix. In this paper, we empirically identify the role of the hub and authority centralities based on this matrix using data on microfinance adoption in rural Indian villages. Controlling for other well-known centrality measures, authority centrality is positively associated with final adoption rates in the villages, but hub centrality is not. Furthermore, we find that authority centrality is the most informative variable predicting microfinance diffusion success from LASSO regressions.
MeSH term(s)	Humans ; Group Processes ; Consensus
Language	English
Publishing date	2023-05-31
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0286369
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Comparison of Muscle Activity and Muscle Thickness According to Knee Flexion Angle during Supine Bridge Exercises using the Abdominal Drawing-in Maneuver on an Unstable Surface.

Kim, Sumin / Park, Junhyung / Her, Jingang

Journal of sports science & medicine

2023 Volume 22, Issue 3, Page(s) 431–435

Abstract: This study evaluated changes in deep trunk muscle thickness and lower extremity muscle activities during bridge exercises with the abdominal drawing-in maneuver. Bridge exercises were conducted on an unstable surface at different knee flexion angles (60º, ...

Abstract	This study evaluated changes in deep trunk muscle thickness and lower extremity muscle activities during bridge exercises with the abdominal drawing-in maneuver. Bridge exercises were conducted on an unstable surface at different knee flexion angles (60º, 90º and 120º), with the aim of identifying more effective angles for bridge exercises. This study included 21 healthy adults, aged 20-27 years. Biceps femoris (BF), rectus abdominis, and rectus femoris activity was measured using surface electromyography. The thicknesses of the transverse abdominis (TrA), external oblique (EO) and internal oblique (IO) muscles were measured. BF (
MeSH term(s)	Adult ; Humans ; Exercise Therapy ; Exercise ; Rectus Abdominis ; Hamstring Muscles ; Quadriceps Muscle
Language	English
Publishing date	2023-09-01
Publishing country	Turkey
Document type	Journal Article
ZDB-ID	2075564-8
ISSN	1303-2968 ; 1303-2968
ISSN (online)	1303-2968
ISSN	1303-2968
DOI	10.52082/jssm.2023.431
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Article ; Online: Conductive and Adhesive Granular Alginate Hydrogels for On-Tissue Writable Bioelectronics.

Kim, Sumin / Choi, Heewon / Son, Donghee / Shin, Mikyung

Gels (Basel, Switzerland)

2023 Volume 9, Issue 2

Abstract: Conductive hydrogels are promising materials in bioelectronics that ensure a tissue-like soft modulus and re-enact the electrophysiological function of damaged tissues. However, recent approaches to fabricating conductive hydrogels have proved difficult: ...

Abstract	Conductive hydrogels are promising materials in bioelectronics that ensure a tissue-like soft modulus and re-enact the electrophysiological function of damaged tissues. However, recent approaches to fabricating conductive hydrogels have proved difficult: fixing of the conductive hydrogels on the target tissues hydrogels requires the aids from other medical glues because of their weak tissue-adhesiveness. In this study, an intrinsically conductive and tissue-adhesive granular hydrogel consisting of a PEDOT:PSS conducting polymer and an adhesive catechol-conjugated alginate polymer was fabricated via an electrohydrodynamic spraying method. Because alginate-based polymers can be crosslinked by calcium ions, alginate-catechol polymers mixed with PEDOT:PSS granular hydrogels (ACP) were easily fabricated. The fabricated ACP exhibited not only adhesive and shear-thinning properties but also conductivity similar to that of muscle tissue. Additionally, the granular structure makes the hydrogel injectable through a syringe, enabling on-tissue printing. This multifunctional granular hydrogel can be applied to soft and flexible electronics to connect humans and machines.
Language	English
Publishing date	2023-02-19
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2813982-3
ISSN	2310-2861 ; 2310-2861
ISSN (online)	2310-2861
ISSN	2310-2861
DOI	10.3390/gels9020167
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Giant Spin-Orbit Torque in Sputter-Deposited Bi Films.

Kim, Sumin / Lee, Hyun-Woo / Choi, Gyung-Min

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

2023 Volume 10, Issue 31, Page(s) e2303831

Abstract: Bismuth (Bi) has the strongest spin-orbit coupling among non-radioactive elements and is thus a promising material for efficient charge-to-spin conversion. However, previous electrical detections have reported controversial results for the conversion ... ...

Abstract	Bismuth (Bi) has the strongest spin-orbit coupling among non-radioactive elements and is thus a promising material for efficient charge-to-spin conversion. However, previous electrical detections have reported controversial results for the conversion efficiency. In this study, an optical detection of a spin-orbit torque is reported in a Bi/CoFeB bilayer with a polycrystalline texture of (012) and (003). Taking advantage of the optical detection, spin-orbit torque is accurately separated from the Oersted field and achieves a giant damping-like torque efficiency of +0.5, verifying efficient charge-to-spin conversion. This study also demonstrates a field-like torque efficiency of -0.1. For the mechanism of the charge-to-spin conversion, the bulk spin Hall effect and the interface Rashba-Edelstein effect are considered.
Language	English
Publishing date	2023-09-07
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2808093-2
ISSN	2198-3844 ; 2198-3844
ISSN (online)	2198-3844
ISSN	2198-3844
DOI	10.1002/advs.202303831
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Astrocytes Stimulate Microglial Proliferation and M2 Polarization In Vitro through Crosstalk between Astrocytes and Microglia.

Kim, Sumin / Son, Youngsook

International journal of molecular sciences

2021 Volume 22, Issue 16

Abstract: Microglia are resident immune cells of the central nervous system that act as brain-specific macrophages and are also known to regulate the innate immune functions of astrocytes through secretory molecules. This communication plays an important role in ... ...

Abstract	Microglia are resident immune cells of the central nervous system that act as brain-specific macrophages and are also known to regulate the innate immune functions of astrocytes through secretory molecules. This communication plays an important role in brain functions and homeostasis as well as in neuropathologic disease. In this study, we aimed to elucidate whether astrocytes and microglia could crosstalk to induce microglial polarization and proliferation, which can be further regulated under a microenvironment mimicking that of brain stroke. Microglia in a mixed glial culture showed increased survival and proliferation and were altered to M2 microglia; CD11b
MeSH term(s)	Animals ; Astrocytes/cytology ; Astrocytes/drug effects ; Astrocytes/immunology ; Cell Communication ; Cell Polarity/drug effects ; Cell Proliferation/drug effects ; Cells, Cultured ; Granulocyte-Macrophage Colony-Stimulating Factor/pharmacology ; Interleukin-10/metabolism ; Interleukin-4/metabolism ; Macrophages/cytology ; Macrophages/drug effects ; Macrophages/immunology ; Microglia/cytology ; Microglia/drug effects ; Microglia/immunology ; Rats
Chemical Substances	Interleukin-10 (130068-27-8) ; Interleukin-4 (207137-56-2) ; Granulocyte-Macrophage Colony-Stimulating Factor (83869-56-1)
Language	English
Publishing date	2021-08-16
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2019364-6
ISSN	1422-0067 ; 1422-0067 ; 1661-6596
ISSN (online)	1422-0067
ISSN	1422-0067 ; 1661-6596
DOI	10.3390/ijms22168800
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