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Estimation of the Duration of Covid-19 Epidemic in a Single Country, with or without Vaccinations. The Case of Bulgaria and Germany 在接种疫苗或未接种疫苗的情况下估算单个国家Covid-19流行持续时间。保加利亚和德国的案例
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2021-06-20 DOI: 10.7546/CRABS.2021.05.05
O. Kounchev, G. Simeonov, Z. Kuncheva
{"title":"Estimation of the Duration of Covid-19 Epidemic in a Single Country, with or without Vaccinations. The Case of Bulgaria and Germany","authors":"O. Kounchev, G. Simeonov, Z. Kuncheva","doi":"10.7546/CRABS.2021.05.05","DOIUrl":"https://doi.org/10.7546/CRABS.2021.05.05","url":null,"abstract":"In the present paper we develop a methodology for the estimation of the duration of the Epidemic of Covid-19 in a single country, with or without vaccinations, accounting for different scenarios. Our methodology is based on a specific SEIR model, called ATVBG-SEIR model, which is explained in detail. The results are especially interesting for vaccination-free society since they show what the Covid-19 mortality would be in different scenarios. We include vaccinations in the model which are carried out according to a vaccination plan provided on a daily basis. The main constraint to be accounted by the methodology is the number of Intensive Care Units (ICU) reserved for Covid-19 patients (they are e.g. about 1100 in Bulgaria, about 8000 in Germany, etc.). A Web-based Lockdown Scenarios Tool has been developed, based on the present methodology, which is available at www.atvbg-seir.eu. Results in the paper are demonstrating the efficiency of the tool by applying it to Covid-19 data from Bulgaria and Germany, while in the tool we provide online models for Austria, Bulgaria, Germany, Italy, UK and USA. © 2021 Academic Publishing House. All rights reserved.","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"41 1","pages":"677-686"},"PeriodicalIF":0.3,"publicationDate":"2021-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76699626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Lidar monitoring and in situ sampling of particulate matter in lowest atmospheric layers over urban area 城市地区低层大气颗粒物的激光雷达监测和原位采样
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2021-01-01 DOI: 10.7546/CRABS.2021.09.04
I. Grigorov, C. Ghelev, G. Kolarov, M. Iliev, B. Angelova, R. Ilieva, V. Groudeva, Z. Cherkezova-Zheleva, D. Stoyanov, I. Nedkov
{"title":"Lidar monitoring and in situ sampling of particulate matter in lowest atmospheric layers over urban area","authors":"I. Grigorov, C. Ghelev, G. Kolarov, M. Iliev, B. Angelova, R. Ilieva, V. Groudeva, Z. Cherkezova-Zheleva, D. Stoyanov, I. Nedkov","doi":"10.7546/CRABS.2021.09.04","DOIUrl":"https://doi.org/10.7546/CRABS.2021.09.04","url":null,"abstract":"The present study is related to elucidating the remote sensing monitoring and capabilities for profiling to particulate matter (PM) mass concentration control in the lowest atmospheric layers. The PM was studied at a distance of 5.5 km from the LIDAR station. The experiments were conducted in May and October 2020 in the South-Eastern part of the Bulgarian capital Sofia during a COVID-19 lockdown. The LIDAR measurement data was compared during the experiments with in situ sampling by mobile devices located just below the spot of the LIDAR beam: (i) Absorber collects particles higher than 3 μm;(ii) PM Microcollector type SDS 011;and (iii) Andersen Cascade Impactor for exploring PM size distribution and microbiota. The results obtained show that remote sensing can be very effective when quantitative evaluation has been combined with in situ sampling for PM qualitative assessment. © 2021 Academic Publishing House. All rights reserved.","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"33 1","pages":"1296-1304"},"PeriodicalIF":0.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86305700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Viral Respiratory Pathogens Associated with Medically Attended Acute Respiratory Illnesses in Older Adults in Bulgaria 保加利亚老年人急性呼吸道疾病与病毒性呼吸道病原体相关
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2020-05-20 DOI: 10.7546/crabs.2020.04.07
N. Korsun, S. Angelova, I. Trifonova, I. Georgieva, S. Voleva
{"title":"Viral Respiratory Pathogens Associated with Medically Attended Acute Respiratory Illnesses in Older Adults in Bulgaria","authors":"N. Korsun, S. Angelova, I. Trifonova, I. Georgieva, S. Voleva","doi":"10.7546/crabs.2020.04.07","DOIUrl":"https://doi.org/10.7546/crabs.2020.04.07","url":null,"abstract":"Acute respiratory infections (ARIs) are a major cause of morbidity and mortality among older adults This study aimed to determine the viral etiology of these infections in patients aged >= 65 years during two successive epidemic seasons in Bulgaria Nasal and throat specimens were collected from the enrolled patients during the 2015/2016 and 2016/2017 seasons The viral etiology was determined by individual Real Time PCR assays against 15 respiratory viruses Of the 160 adults examined, 74 (46 3%) were positive for at least one respiratory virus Co-infections with two and three viruses were found in 14 (18 9%) of the infected patients Influenza A(H3N2) (15 6%) and A(H1N1)pdm09 (13 1%) viruses were the predominant pathogens, followed by adenoviruses (5 6%);respiratory-syncytial virus (3 8%);metapneumovirus (3 1%);rhinoviruses (2 5%);coronaviruses - NL63 (2 5%), OC43 (1 9%), HKU1 (1 9%) and 229E (1 3%);influenza type B (1 9%);bocaviruses (1 3%) and parainfluenza viruses 1/2/3 (1 3%) At least one respiratory virus was identified in 50% and 32 3% of the patients with acute lower respiratory tract illnesses and neurological complications, respectively Respiratory viruses, especially influenza A viruses, are major pathogens of ARIs in persons aged >= 65 years Diagnostic testing for respiratory viruses using molecular methods can help in clinical decision making and may assist in measures to prevent health careassociated infections","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"80 1","pages":"490-497"},"PeriodicalIF":0.3,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85071374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of Porosity of Textiles with an Uneven Pore Size 孔径不均匀纺织品孔隙率的测定
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2020-02-10 DOI: 10.7546/crabs.2020.01.12
R. Angelova
{"title":"Determination of Porosity of Textiles with an Uneven Pore Size","authors":"R. Angelova","doi":"10.7546/crabs.2020.01.12","DOIUrl":"https://doi.org/10.7546/crabs.2020.01.12","url":null,"abstract":"The research studies in the porosity of textile macrostructures have always been relevant, but they have undergone significant progress with the development of optical devices and computer facilities. The main reason for this continuous interest is the strong correlation between textile porosity and the transfer of heat, fluids, and matter. Adequate porosity determination is needed for estimation of the influence of the macrostructure’s parameters on the transfer abilities of the textiles and their adequate design. The present study aims to experimentally determine the porosity of textile macrostructures with uneven pores, using image analysis. Microscopic images of seven fabrics were converted to binary images, and the pore content was assessed. The results were verified with a classical method for the determination of porosity of woven macrostructures. The obtained results show a very good correlation with the theoretical porosity of woven macrostructures. The proposed image analysis can be used for the determination of porosity of other types of textile macrostructures with uneven pore size.","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"6 1","pages":"96-102"},"PeriodicalIF":0.3,"publicationDate":"2020-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89680874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nectria decora (Hypocreales) Associated with Fusarium lateritium in Bulgaria 在保加利亚与红土镰刀菌有关的赤藓
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2018-10-28 DOI: 10.7546/crabs.2018.10.06
D. Stoykov, P. Alvarado, Z. Stoyanova
{"title":"Nectria decora (Hypocreales) Associated with Fusarium lateritium in Bulgaria","authors":"D. Stoykov, P. Alvarado, Z. Stoyanova","doi":"10.7546/crabs.2018.10.06","DOIUrl":"https://doi.org/10.7546/crabs.2018.10.06","url":null,"abstract":"","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"35 1","pages":"1336-1341"},"PeriodicalIF":0.3,"publicationDate":"2018-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74788324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Developmental Stability of the Golden Jackal (Canis aureus moreoticus Geoffrey 1835) Populations in Southeastern Europe 东南欧金豺(Canis aureus moreoticus Geoffrey 1835)种群的发育稳定性
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2018-07-21 DOI: 10.7546/CRABS.2018.07.07
G. Markov, M. Heltai, Ivan Nikolov, A. Penezić, J. Lanszki, D. Ćirović
{"title":"Developmental Stability of the Golden Jackal (Canis aureus moreoticus Geoffrey 1835) Populations in Southeastern Europe","authors":"G. Markov, M. Heltai, Ivan Nikolov, A. Penezić, J. Lanszki, D. Ćirović","doi":"10.7546/CRABS.2018.07.07","DOIUrl":"https://doi.org/10.7546/CRABS.2018.07.07","url":null,"abstract":"","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"40 1","pages":"916-921"},"PeriodicalIF":0.3,"publicationDate":"2018-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80838477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Grapevine Leaf Area Measurements by Using Pixel Values 利用像素值测量葡萄叶面积
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2018-06-30 DOI: 10.7546/CRABS.2018.06.07
A. Doğan, C. Uyak, N. Keskin, Anil Akcay, Ruhan Ilknur, G. Şensoy, S. Ercişli
{"title":"Grapevine Leaf Area Measurements by Using Pixel Values","authors":"A. Doğan, C. Uyak, N. Keskin, Anil Akcay, Ruhan Ilknur, G. Şensoy, S. Ercişli","doi":"10.7546/CRABS.2018.06.07","DOIUrl":"https://doi.org/10.7546/CRABS.2018.06.07","url":null,"abstract":"","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"283 1","pages":"772-779"},"PeriodicalIF":0.3,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76818886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Trophoblast Cell Lines JAR and JEG-3 Modulate CD90 (Thy‑1) Expression on Decidual Stromal Cells 滋养细胞JAR和JEG-3调节CD90 (Thy - 1)在蜕质细胞上的表达
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2018-06-30 DOI: 10.7546/CRABS.2018.06.10
K. Vinketova, I. Karaguozov, M. Mourdjeva, M. Sperandio, T. Oreshkova
{"title":"Trophoblast Cell Lines JAR and JEG-3 Modulate CD90 (Thy‑1) Expression on Decidual Stromal Cells","authors":"K. Vinketova, I. Karaguozov, M. Mourdjeva, M. Sperandio, T. Oreshkova","doi":"10.7546/CRABS.2018.06.10","DOIUrl":"https://doi.org/10.7546/CRABS.2018.06.10","url":null,"abstract":"CD90 is a glycoprotein involved in leukocyte homing and cell differentiation. In human endometrium CD90 is described on endothelial and stromal cells. If pregnancy occurs, the tissue is infiltrated by immune and trophoblast cells, which cooperate to remodel the tissue. The process requires a fine regulation of cell adhesion and migration. The expression of CD90 on cultured decidual stromal cells and its modulation by trophoblast cells from JAR and JEG-3 cell lines via soluble factors are investigated by flow cytometry. Some of decidual stromal cell lines showed ubiquitous expression of CD90 but in others a coexistence of CD90(high) and CD90(low) decidual stromal cells was observed. Further, a reduction of CD90 expression on decidual stromal cells was defined when decidual stromal cells communicate with trophoblast cells via soluble factors. The results sugguest a trophoblast guided differentiation of decidual stromal cells that could influence immune cells migration and tissue distribution.","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"77 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90975497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Epigenetic Variation and Distinctness of Golden Jackal (Canis aureus) Populations in its Expanding South-east European Range 扩大的东南欧地区金豺(Canis aureus)种群的表观遗传变异和独特性
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2018-06-30 DOI: 10.7546/CRABS.2018.06.09
G. Markov, M. Heltai, Ivan Nikolov, A. Penezić, J. Lanszki, D. Ćirović
{"title":"Epigenetic Variation and Distinctness of Golden Jackal (Canis aureus) Populations in its Expanding South-east European Range","authors":"G. Markov, M. Heltai, Ivan Nikolov, A. Penezić, J. Lanszki, D. Ćirović","doi":"10.7546/CRABS.2018.06.09","DOIUrl":"https://doi.org/10.7546/CRABS.2018.06.09","url":null,"abstract":"","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"47 1","pages":"787-793"},"PeriodicalIF":0.3,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77938722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
New data from graptolites and quartz arenites for the Ordovician–Silurian boundary in the Murzuq Basin, Libya 利比亚Murzuq盆地奥陶系-志留系界线笔石和石英砂岩的新资料
IF 0.3 4区 综合性期刊
Comptes Rendus De L Academie Bulgare Des Sciences Pub Date : 2018-05-02 DOI: 10.7546/CRABS.2018.04.09
V. Sachanski, D. K. Loydell, A. Chatalov
{"title":"New data from graptolites and quartz arenites for the Ordovician–Silurian boundary in the Murzuq Basin, Libya","authors":"V. Sachanski, D. K. Loydell, A. Chatalov","doi":"10.7546/CRABS.2018.04.09","DOIUrl":"https://doi.org/10.7546/CRABS.2018.04.09","url":null,"abstract":"The graptolite-bearing interval in well A1-NC101, Libya indicates a Hirnantian age (persculptus graptolite Zone) for the lowermost Tanezzuft Fm based on the presence and stratigraphical distribution of N.? pseudovenustus. In the C1-NC101 core, the presence of N. inazaouae (recognised for the first time outside Algeria) and M. parvulus indicates either the uppermost Ordovician or the lowermost Silurian, but the revised total stratigraphical range of N. targuii (ascensus-acuminatus graptolite Zone) suggests an earliest Rhuddanian age. Several specimens of N. targuii are longer than those previously recorded. Pure quartz arenites of the uppermost Mamuniyat Fm (well A1-NC101) were deposited during the end-Hirnantian deglaciation probably in a nearshore marine environment. Their provenance was associated with sedimentary recycling of mature sands that were formed across North Gondwana in Cambrian and pre-glacial Ordovician times.","PeriodicalId":50652,"journal":{"name":"Comptes Rendus De L Academie Bulgare Des Sciences","volume":"26 3 1","pages":"506-515"},"PeriodicalIF":0.3,"publicationDate":"2018-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89302643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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