Epidemiology of HCV and HBV Infections among Nurses in Mongolia

( Renchin Bayasgalan ),( Dashchirev Munkh-orshikh ),( Oidov Baatarkhuu ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1

Aims: M.Colombo, W.Lange studies showed that 30-40% of people become chronic after suffering from-Hepatitis B and C virus, about 50% chronic cases transformed into primary liver cancer. There are a few studies in our country were conducted on hepatitis among health care professionals, particular nursing personnel. The study was conducted to identify of hepatitis B and C virus among nurses and make recommendations to prevent and control of hepatitis B and C virus infections. Methods: We carried out cross-sectional study among selected nurses to determine surface antigen of hepatitis B virus and antibodies to hepatitis C virus. For identification of these antibody and antigen and validation of results ELISA tests from CTK, Biotech company (USA) and simplifying diagnostics were used. Results: There were 598 nurses from the First Central hospital, the Second Central hospital, the Third central hospital, Railway Central hospital, Hospital Ministry of Justice and Internal Affairs and National Center of Maternal and Child Health who participated in the study. From 5 hospitals 598 nurses surveyed and revealed the hepatitis B virus surface antigen positive 18.9%, hepatitis C virus antibodies in 23.1%, co-infection of hepatitis B and C were detected 1.2%. There is an urgent need to provide knowledge to medical personnel regarding standards during the procedures, concerning hepatitis infections monitoring and improve technology used during procedures. Conclusions: The study identified that 43.2% of nurses surveyed on hepatitis B and C viruses were detected. It shows a high prevalence among the nurses in Mongolia.

Detection of Edges in Color Images

Ganchimeg, Ganbold,Turbat, Renchin The Institute of Electronics and Information Engin 2014 IEIE Transactions on Smart Processing & Computing Vol.3 No.6

Edge detection considers the important technical details of digital image processing. Many edge detection operators already perform edge detection in digital color imaging. In this study, the edge of many real color images that represent the type of digital image was detected using a new operator in the least square approximation method, which is a type of numerical method. The Linear Fitting algorithm is computationally more expensive compared to the Canny, LoG, Sobel, Prewitt, HIS, Fuzzy, Parametric, Synthetic and Vector methods, and Robert' operators. The results showed that the new method can detect an edge in a digital color image with high efficiency compared to standard methods used for edge detection. In addition, the suggested operator is very useful for detecting the edge in a digital color image.

Development of the spectral forest index in the Khangai region, Mongolia using Sentinel-2 imagery

Norovsuren Bayanmunkh,Tseveen Batchuluun,Renchin Tsolmon,Natsagdorj Enkhjargal 한국산림과학회 2023 Forest Science And Technology Vol.19 No.1

Mongolian forests have low productivity and growth and are vulnerable to disturbances. Additionally, it is difficult to control and evaluate the forested areas. Therefore, satellite data and surveillance methods are needed to study mountain forests. This study aimed to determine the changes in the main forest cover classes of Khangal soum using remote sensing and geographical information system datasets. A spectral forest index (SFI) using Sentinel-2 imagery was developed for forest cover estimations and applied to the study area during 2015–2020. The SFI was based on the forest index (FI) and the concept of Dark Objects. Each SFI was compared to existing vegetation indices (ratio vegetation index, normalized difference vegetation index, leaf area index, and forest index) for forest data analysis. The highest correlation was with SFI2. The SFI2 data agreed with the national forest inventory (NFI) 2018 data. The SFI2 of the forest area was set at 1.2, which was confirmed with 90.4% confidence. Overall, SFI2 is suitable for land cover/land use changes and forest classification, monitoring, and management in Mongolia and could be crucial for estimating the boundary of forested areas depending on the forest cover and species in the region.

A Deep Variational Autoencoder Based Inverse Method for Active Energy Consumption of Mining Plants and Ball Grinding Circuit Investigation

Munkherdene Tsagaan,Batdemberel Ganbat,Seddorj Renchin,Uugantuya Khurlee,Oyunjargal Ichin 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.3

The natural ore distribution is unique, and the mining process entirely depends on it. Thus, every mining has its way of dressing ore due to the plan of industry. Therefore, in optimal and control energy systems, the relation between ore distribution, parameters of stages, and the final output are vital to understanding the entire dressing plant. In this way, the paper purpose of developing a learning-based inverse method to understand the relationship between the ore (gathered from a few different open pits) and the final recovery rate of minerals. The variational autoencoder’s exceptional property is suitable for the learning-based inverse method, and the low dimensional space in the encoding and decoding process connects to the first input ore and the final outputs regarding the daily plan. When the first input ore is determined corresponding to the planned recovery, we use the low dimensional space to express the stages’ appropriate parameters. The milling stage is the most crucial stage of the plant, and for the validation propose of the method, the real experiment that investigated the learning result of the selected ball milling stage. Finally, the predictive-based control system was considered based on generating a variational autoencoder-based learning feature.

Impact of logging operations on forest ecosystem in the Khantai mountain region and forest cover mapping

Batchuluun Tseveen,Enkhjargal Natsagdorj,Altangerel Balgan,Tsolmon Renchin,Bayanmunkh Norovsuren,Zaya Mart 한국산림과학회 2020 Forest Science And Technology Vol.16 No.3

Forests in Mongolia yield low productivity and are vulnerable to disturbances from drought, fire, pests, and illegal logging. Such forests can quickly lose their ecological balance. Logging activities in these areas are limited in monitoring and controls. This study assesses two different logging operations for their natural regeneration capacity by comparing the composition of the soil, soil organisms, physical and chemical properties, and forest cover change after the completion of logging operations. The logging operations were analyzed in two different regions, the Khartsai and Tariakhtai threshold in Selenge soum, Bulgan province. A skyline logging operation was undertaken on Khartsai threshold in 1983 and a tractor logging operation (clear-cutting) on Tariakhtai threshold in 1987. After the completion of the logging, the forests were naturally regenerated. In 2002, soil samples were collected and soil organisms and physical and chemical properties were examined. Satellites images were also used to evaluate forest cover changes after the end of the logging operations. Significant differences in the naturally regenerated tree species in the skyline logging, tractor logging, and natural forest areas were observed. Average tree ring growth was 0.9 mm in the skyline logging site, 0.6 mm in the tractor logging site, and 1.2 mm in the natural forest. Based on forest cover changes observed in satellite images, the density of naturally regenerated tree species in the natural forest area was higher than that in the skyline logging area. In contrast, the latter recorded a higher density than that in the tractor logging area. Therefore, processing of satellite images of forest cover changes with high-resolution data provides valuable information for the local forest community and helps decision-makers in their further actions.

Recognition of printed Traditional Mongolian script

Batbayar Unursaikhan,Lodoiravsal Choimaa,Amartuvshin Renchin 한국멀티미디어학회 2011 한국멀티미디어학회 국제학술대회 Vol.2011 No.-

Historical and cultural heritages written in traditional Mongolian script are been made in only few copies, some of them even in only one. Electronic copies of those books are necessary for future study of them. This work focuses to create intelligent software for printed Traditional Mongolian script recognition based on unique characteristic of thereof.

Temperature Fluctuations Over the Past 2000 Years in Western Mongolia

Pederson, Neil,Jacoby, Gordon C.,D′Arrigo, Rosanne.,Frank, David,Buckley, Brendan,Nachin, Baatarbileg,Chultem, Dugarjav,Renchin, Mijiddorj Korea Association For Quaternary Research 2003 제사기학회지 Vol.17 No.2

Much of northern Asia is lacking in high-resolution palaeoclimatic data coverage. This vast region thus represents a sizeable gap in data sets used to reconstruct hemispheric-scale temperature trends for the past millennium. To improve coverage, we present a regional-scale composite of four tree-ring width records of Siberian pine and Siberian larch from temperature-sensitive alpine timber-line sites in Mongolia. The chronologies load closely in principal components analysis (PCA) with the first eigenvector accounting for over 53% of the variance from ad 1450 to 1998. The 20-year interval from 1974 to 1993 is the highest such growth period in this composite record, and 17 of the 20 highest growth years have occurred since 1946. Thus these trees, unlike those recently described at some northern sites, do not appear to have lost their temperature sensitivity, and suggest that recent decades have been some of the warmest in the past 500 years for this region. There are, however, comparable periods of inferred, local warmth for individual sites, e.g., in 1520-1580 and 1760-1790. The percent common variance between chronologies has increased through time and is highest (66.1%) in the present century. Although there are obvious differences among the individual chronologies, this result suggests a coherent signal which we consider to be related to temperature. The PCA scores show trends which strongly resemble those seen in recent temperature reconstructions for the Northern Hemisphere, very few of which included representation from Eurasia east of the Ural Mountains. The Mongolia series therefore provides independent corroboration for these reconstructions and their indications of unusual wanning during the twentieth century.