LIVIVO - Search results -

Search results

Result 1 - 10 of total 115

Search options

Article ; Online: Enhancing LOD determination in gas chromatography: Validating the Hubaux-Vos method for gas concentration measurement.

Kim, Hyeong Rae / Kim, Sunwoo / Jung, Jinsang / Lee, Hwan / Ho, Keon / Kim, Byeongmoon / Oh, Sanghyub

2024 Volume 1720, Page(s) 464764

Abstract: The limit of detection (LOD) is a crucial measure in analytical methods, representing the smallest amount of a substance that can be distinguished from background noise. In the realm of gas chromatography (GC), however, determining LOD can be quite ... ...

Abstract	The limit of detection (LOD) is a crucial measure in analytical methods, representing the smallest amount of a substance that can be distinguished from background noise. In the realm of gas chromatography (GC), however, determining LOD can be quite subjective, leading to significant variability among researchers. In this study, we validate the Hubaux-Vos method, an International Standards Organization(ISO)-approved approach for determining LOD in gas concentration measurements, using a GC equipped with a discharge ionization detector (DID) and a dynamic dilution system. We employ a gas mixture certified reference material (CRM) of CO, CH
MeSH term(s)	Limit of Detection ; Chromatography, Gas/methods ; Calibration ; Reference Standards ; Indicator Dilution Techniques
Language	English
Publishing date	2024-02-20
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1171488-8
ISSN	1873-3778 ; 0021-9673
ISSN (online)	1873-3778
ISSN	0021-9673
DOI	10.1016/j.chroma.2024.464764
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 813: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Earlobe Reconstruction Using Two Opposed Periauricular Dermal Pedicled Flap.

Ryu, Hyeong Rae / Lee, Da Woon / Kim, Jun Hyuk

The Journal of craniofacial surgery

2022 Volume 34, Issue 2, Page(s) 721–722

Abstract: There are several flap techniques of earlobe reconstruction. The ideal method should be a 1-stage procedure that is simple, has fewer complications, and has excellent esthetic outcomes with a proper earlobe texture and volume. We report a case of a 45- ... ...

Abstract	There are several flap techniques of earlobe reconstruction. The ideal method should be a 1-stage procedure that is simple, has fewer complications, and has excellent esthetic outcomes with a proper earlobe texture and volume. We report a case of a 45-year-old man presented with skin and soft tissue defect of right ear lobule. He underwent composite graft using 2×1 cm sized stump. Two weeks later, total necrosis of graft site was observed. After that, he underwent 2 opposed periauricular dermal pedicled flap. Each flap caudally based periauricular flaps were elevated and consisted of redundant fat tissue. These flaps were sutured like sandwich and the donor sites were closured by primary repair. There was no complication as flap congestion or hematoma. After 6 months, the patient was satisfied esthetically and there was no need of additional surgical procedure. We introduce new technique of earlobe reconstruction named 2 opposed periauricular flap. This method affords reconstruction of large sized and full-thickness earlobe defect in a simple, easy manner. It provides proper texture and volume as normal earlobe. Also, it is 1-stage method not requiring skin graft or debulking procedure. Therefore, if plastic surgeon reconstructs a large defect of earlobe, our technique can be thought of as one good option.
MeSH term(s)	Male ; Humans ; Middle Aged ; Esthetics, Dental ; Surgical Flaps ; Skin Transplantation/methods ; Ear Auricle ; Transplants
Language	English
Publishing date	2022-08-11
Publishing country	United States
Document type	Case Reports ; Journal Article
ZDB-ID	1159501-2
ISSN	1536-3732 ; 1049-2275
ISSN (online)	1536-3732
ISSN	1049-2275
DOI	10.1097/SCS.0000000000008899
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 3761: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (2.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MO 175: Show issues

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: High air flow-rate electrostatic sampler for the rapid monitoring of airborne coronavirus and influenza viruses.

Kim, Hyeong Rae / An, Sanggwon / Hwang, Jungho

Journal of hazardous materials

2021 Volume 412, Page(s) 125219

Abstract: Capturing virus aerosols in a small volume of liquid is essential when monitoring airborne viruses. As such, aerosol-to-hydrosol enrichment is required to produce a detectable viral sample for real-time quantitative reverse transcription polymerase chain ...

Abstract	Capturing virus aerosols in a small volume of liquid is essential when monitoring airborne viruses. As such, aerosol-to-hydrosol enrichment is required to produce a detectable viral sample for real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) assays. To meet this requirement, the efficient and non-destructive collection of airborne virus particles is needed, while the incoming air flow rate should be sufficiently high to quickly collect a large number of virus particles. To achieve this, we introduced a high air flow-rate electrostatic sampler (HAFES) that collected virus aerosols (human coronavirus 229E, influenza A virus subtypes H1N1 and H3N2, and bacteriophage MS2) in a continuously flowing liquid. Viral collection efficiency was evaluated using aerosol particle counts, while viral recovery rates were assessed using real-time qRT-PCR and plaque assays. An air sampling period of 20 min was sufficient to produce a sample suitable for use in real-time qRT-PCR in a viral epidemic scenario.
MeSH term(s)	Aerosols ; Air Microbiology ; Coronavirus/genetics ; Humans ; Influenza A Virus, H1N1 Subtype/genetics ; Influenza A Virus, H3N2 Subtype ; Static Electricity
Chemical Substances	Aerosols
Language	English
Publishing date	2021-01-23
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2021.125219
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Aerosol-to-Hydrosol Sampling and Simultaneous Enrichment of Airborne Bacteria For Rapid Biosensing.

Kim, Hyeong Rae / An, Sanggwon / Hwang, Jungho

ACS sensors

2020 Volume 5, Issue 9, Page(s) 2763–2771

Abstract: Rapid monitoring of biological particulate matter (Bio-PM, bioaerosols) requires an enrichment technique for concentrating the Bio-PM dispersed in the air into a small volume of liquid. In this study, an electrostatic air sampler is employed to capture ... ...

Abstract	Rapid monitoring of biological particulate matter (Bio-PM, bioaerosols) requires an enrichment technique for concentrating the Bio-PM dispersed in the air into a small volume of liquid. In this study, an electrostatic air sampler is employed to capture aerosolized test bacteria in a carrier liquid (aerosol-to-hydrosol (ATH) enrichment). Simultaneously, the captured bacteria are carried into a fluid channel for hydrosol-to-hydrosol (HTH) enrichment with Concanavalin A coated magnetic particles (CMPs). The ATH enrichment capacity of the air sampler was evaluated with an aerosol particle counter for the following test bacteria:
MeSH term(s)	Aerosols ; Air Microbiology ; Bacteria ; Environmental Monitoring ; Particulate Matter/analysis
Chemical Substances	Aerosols ; Particulate Matter
Language	English
Publishing date	2020-06-16
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2379-3694
ISSN (online)	2379-3694
DOI	10.1021/acssensors.0c00555
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: RCS Estimation of Singly Curved Dielectric Shell Structure with PMCHWT Method and Experimental Verification.

Im, Hyeong-Rae / Kim, Woobin / Noh, Yeong-Hoon / Hong, Ic-Pyo / Yook, Jong-Gwan

Sensors (Basel, Switzerland)

2022 Volume 22, Issue 3

Abstract: In this paper, a numerical algorithm for the electromagnetic scattering analysis of singly curved dielectric structures, which can be applied to a canopy of fighter aircraft, is presented with experimental verification. At first, the Poggio-Miller-Chang- ... ...

Abstract	In this paper, a numerical algorithm for the electromagnetic scattering analysis of singly curved dielectric structures, which can be applied to a canopy of fighter aircraft, is presented with experimental verification. At first, the Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT) method is used as a MoM-based solution for the electromagnetic scattering of a dielectric material. Its formulation was generated with the EFIE formulation in a multi-region condition. The PMCHWT algorithm is implemented with C++ code, and the accuracy is verified by calculating the bistatic RCS of some canonical structures with conductive or dielectric materials. RCS measurement under quasi-anechoic condition is presented with its procedure and calibration method. The monostatic RCS results of a specially modeled singly curved dielectric structures are obtained analytically with the PMCHWT, as well as experimentally, revealing excellent agreement.
Language	English
Publishing date	2022-01-19
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s22030734
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Feasibility Study of Federated Learning on the Distributed Research Network of OMOP Common Data Model.

Lee, Geun Hyeong / Park, Jonggul / Kim, Jihyeong / Kim, Yeesuk / Choi, Byungjin / Park, Rae Woong / Rhee, Sang Youl / Shin, Soo-Yong

Healthcare informatics research

2023 Volume 29, Issue 2, Page(s) 168–173

Abstract: Objectives: Since protecting patients' privacy is a major concern in clinical research, there has been a growing need for privacy-preserving data analysis platforms. For this purpose, a federated learning (FL) method based on the Observational Medical ... ...

Abstract	Objectives: Since protecting patients' privacy is a major concern in clinical research, there has been a growing need for privacy-preserving data analysis platforms. For this purpose, a federated learning (FL) method based on the Observational Medical Outcomes Partnership (OMOP) common data model (CDM) was implemented, and its feasibility was demonstrated. Methods: We implemented an FL platform on FeederNet, which is a distributed clinical data analysis platform based on the OMOP CDM in Korea. We trained it through an artificial neural network (ANN) using data from patients who received steroid prescriptions or injections, with the aim of predicting the occurrence of side effects depending on the prescribed dose. The ANN was trained using the FL platform with the OMOP CDMs of Kyung Hee University Medical Center (KHMC) and Ajou University Hospital (AUH). Results: The area under the receiver operating characteristic curves (AUROCs) for predicting bone fracture, osteonecrosis, and osteoporosis using only data from each hospital were 0.8426, 0.6920, and 0.7727 for KHMC and 0.7891, 0.7049, and 0.7544 for AUH, respectively. In contrast, when using FL, the corresponding AUROCs were 0.8260, 0.7001, and 0.7928 for KHMC and 0.7912, 0.8076, and 0.7441 for AUH, respectively. In particular, FL led to a 14% improvement in performance for osteonecrosis at AUH. Conclusions: FL can be performed with the OMOP CDM, and FL often shows better performance than using only a single institution's data. Therefore, research using OMOP CDM has been expanded from statistical analysis to machine learning so that researchers can conduct more diverse research.
Language	English
Publishing date	2023-04-30
Publishing country	Korea (South)
Document type	Journal Article
ZDB-ID	2619923-3
ISSN	2093-369X ; 2093-3681
ISSN (online)	2093-369X
ISSN	2093-3681
DOI	10.4258/hir.2023.29.2.168
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Feasibility Study of Federated Learning on the Distributed Research Network of OMOP Common Data Model

Geun Hyeong Lee / Jonggul Park / Jihyeong Kim / Yeesuk Kim / Byungjin Choi / Rae Woong Park / Sang Youl Rhee / Soo-Yong Shin

Healthcare Informatics Research, Vol 29, Iss 2, Pp 168-

2023 Volume 173

Abstract: Objectives Since protecting patients’ privacy is a major concern in clinical research, there has been a growing need for privacy-preserving data analysis platforms. For this purpose, a federated learning (FL) method based on the Observational Medical ... ...

Abstract	Objectives Since protecting patients’ privacy is a major concern in clinical research, there has been a growing need for privacy-preserving data analysis platforms. For this purpose, a federated learning (FL) method based on the Observational Medical Outcomes Partnership (OMOP) common data model (CDM) was implemented, and its feasibility was demonstrated. Methods We implemented an FL platform on FeederNet, which is a distributed clinical data analysis platform based on the OMOP CDM in Korea. We trained it through an artificial neural network (ANN) using data from patients who received steroid prescriptions or injections, with the aim of predicting the occurrence of side effects depending on the prescribed dose. The ANN was trained using the FL platform with the OMOP CDMs of Kyung Hee University Medical Center (KHMC) and Ajou University Hospital (AUH). Results The area under the receiver operating characteristic curves (AUROCs) for predicting bone fracture, osteonecrosis, and osteoporosis using only data from each hospital were 0.8426, 0.6920, and 0.7727 for KHMC and 0.7891, 0.7049, and 0.7544 for AUH, respectively. In contrast, when using FL, the corresponding AUROCs were 0.8260, 0.7001, and 0.7928 for KHMC and 0.7912, 0.8076, and 0.7441 for AUH, respectively. In particular, FL led to a 14% improvement in performance for osteonecrosis at AUH. Conclusions FL can be performed with the OMOP CDM, and FL often shows better performance than using only a single institution’s data. Therefore, research using OMOP CDM has been expanded from statistical analysis to machine learning so that researchers can conduct more diverse research.
Keywords	machine learning ; deep learning ; distributed systems ; privacy ; common data element ; Computer applications to medicine. Medical informatics ; R858-859.7
Subject code	006
Language	English
Publishing date	2023-04-01T00:00:00Z
Publisher	The Korean Society of Medical Informatics
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: One-stage reconstruction of full-thickness alar defects with a folded nasolabial island flap.

Lee, Da Woon / Ryu, Hyeong Rae / Choi, Hwan Jun / Kim, Jun Hyuk

Archives of craniofacial surgery

2021 Volume 22, Issue 6, Page(s) 296–302

Abstract: Background: The reconstruction of large full-thickness alar defects requires complex surgical procedures that are usually performed in two stages, with concomitant disadvantages in terms of patient trauma, surgical risk, and cost. This study presents a ... ...

Abstract	Background: The reconstruction of large full-thickness alar defects requires complex surgical procedures that are usually performed in two stages, with concomitant disadvantages in terms of patient trauma, surgical risk, and cost. This study presents a functional folded nasolabial island flap (FNIF) that can be used to repair large-sized full-thickness alar defects in a straightforward manner. Methods: This retrospective study included seven patients who received a FNIF for a full-thickness alar defect between January 2007 and December 2020. The FNIF is different from the conventional nasolabial flap in that it is folded and twisted to achieve nostril reconstruction with a satisfactory three-dimensional mucosal lining in a single stage. The cosmetic and functional results of FNIF were evaluated by both patients and physicians. Results: The age ranged from 51 to 82 years (mean, 65.6 years). The causes of the defects were squamous cell carcinoma, basal cell carcinoma, and trigeminal trophic syndrome. The nostril lining did not collapse, there was no hypertrophic scarring, and air movement through the nostrils on the flap side was normal. Overall, FNIF produced excellent aesthetic and functional outcomes, with minimal patient discomfort. There were no postoperative complications. Conclusion: Compared with existing reconstruction methods for large full-thickness alar defects, FNIF can easily achieve aesthetic and functional success in a single-stage procedure. It provides satisfactory results for both the patient and the surgeon.
Language	English
Publishing date	2021-12-20
Publishing country	Korea (South)
Document type	Journal Article
ZDB-ID	2800630-6
ISSN	2287-5603 ; 2287-1152
ISSN (online)	2287-5603
ISSN	2287-1152
DOI	10.7181/acfs.2021.00339
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Increased survivability of coronavirus and H1N1 influenza virus under electrostatic aerosol-to-hydrosol sampling.

Piri, Amin / Kim, Hyeong Rae / Park, Dae Hoon / Hwang, Jungho

Journal of hazardous materials

2021 Volume 413, Page(s) 125417

Abstract: Airborne virus susceptibility is an underlying cause of severe respiratory diseases, raising pandemic alerts worldwide. Following the first reports of the novel severe acute respiratory syndrome coronavirus-2 in 2019 and its rapid spread worldwide and ... ...

Abstract	Airborne virus susceptibility is an underlying cause of severe respiratory diseases, raising pandemic alerts worldwide. Following the first reports of the novel severe acute respiratory syndrome coronavirus-2 in 2019 and its rapid spread worldwide and the outbreak of a new highly variable strain of influenza A virus (H1N1) in 2009, developing quick, accurate monitoring and diagnostic approaches for emerging infections is considered critical. Efficient air sampling of coronaviruses and the H1N1 virus allows swift, real-time identification, triggering early adjuvant interventions. Electrostatic precipitation is an efficient method for sampling bio-aerosols as hydrosols; however, sampling conditions critically impact this method. Corona discharge ionizes surrounding air, generating reactive oxygen species (ROS), which may impair virus structural components, leading to RNA and/or protein damage and preventing virus detection. Herein, ascorbic acid (AA) dissolved in phosphate-buffered saline (PBS) was used as the sampling solution of an electrostatic sampler to counteract virus particle impairment, increasing virus survivability throughout sampling. The findings of this study indicate that the use of PBS+AA is effective in reducing the ROS damage of viral RNA by 95%, viral protein by 45% and virus yield by 60%.
MeSH term(s)	Aerosols ; COVID-19 ; Humans ; Influenza A Virus, H1N1 Subtype ; Influenza, Human ; SARS-CoV-2 ; Static Electricity
Chemical Substances	Aerosols
Language	English
Publishing date	2021-02-12
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2021.125417
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Stereoselective Synthesis of Highly Functionalized 5- and 6-Membered Aminocyclitols Starting with a Readily Available 2-Azetidinone.

Achary, Raghavendra / Kim, Hyeong Rae / Lee, Hyeon-Kyu

The Journal of organic chemistry

2019 Volume 84, Issue 7, Page(s) 4263–4272

Abstract: Stereoselective transformations of 4-vinyl-2-azetidinone derivative 4 into a variety of highly functionalized 6- and 5-membered carbocyclic compounds 7 and 9 were carried out using sequences involving sequential C1-N bond cleavage and Ru-catalyzed ring- ... ...

Abstract	Stereoselective transformations of 4-vinyl-2-azetidinone derivative 4 into a variety of highly functionalized 6- and 5-membered carbocyclic compounds 7 and 9 were carried out using sequences involving sequential C1-N bond cleavage and Ru-catalyzed ring-closing metathesis. The derived carbocycles were further transformed into polyhydroxylated 6- and 5-membered aminocyclitols.
Language	English
Publishing date	2019-03-26
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	123490-0
ISSN	1520-6904 ; 0022-3263
ISSN (online)	1520-6904
ISSN	0022-3263
DOI	10.1021/acs.joc.9b00239
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 4473: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (2.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

To top

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito