Roxana-Elena Bogdan-Goroftei, Raisa-Eloise Barbu, M. Marinescu, I. Moraru, Pompiliu-Mircea Bogdan, C. Guțu, D. Ciortea, Anca Ștefanopol
This article aim to identify the main agents and biologicals within the pediatric population hospitalized in the Emergency Clinical Hospital for children, "Sfântul Ioan", Galati. In order to achieve this goal, we conducted a retrospective study on a group of 102 pediatric patients admitted into our clinic, between January 2018 and November 2020, being a cohort type.Respiratory infections, especially opportunistic infections, are often seasonal. Especially increased in the cold months due to seasonal immune depression. The influenza virus H. influenzae is a pathogen with a higher prevalence in the winter months.In order to assess the susceptibility to infections, according to season and age the cross-frequency table and the chi-square test have been performed, and there is no statistically relevant dependence relationship between these variables.Of the 102 patients, 74.51% had a history of respiratory ailments. The most frequent conditions encountered in the antecedents, within this group, were an acute respiratory failure (29.4%) and pneumonia (33.3%).For our study group, in the case of the type of therapy used, a quasi-symmetrical distribution could be observed, where 49.02% of the subjects benefited from double or triple antibiotic therapy, while 50.98% benefited from mono antibiotic therapy.
{"title":"ATYPICAL INFECTIONS IN ACUTE RESPIRATORY FAILURE IN CHILDREN","authors":"Roxana-Elena Bogdan-Goroftei, Raisa-Eloise Barbu, M. Marinescu, I. Moraru, Pompiliu-Mircea Bogdan, C. Guțu, D. Ciortea, Anca Ștefanopol","doi":"10.35219/efms.2022.2.04","DOIUrl":"https://doi.org/10.35219/efms.2022.2.04","url":null,"abstract":"This article aim to identify the main agents and biologicals within the pediatric population hospitalized in the Emergency Clinical Hospital for children, \"Sfântul Ioan\", Galati. In order to achieve this goal, we conducted a retrospective study on a group of 102 pediatric patients admitted into our clinic, between January 2018 and November 2020, being a cohort type.Respiratory infections, especially opportunistic infections, are often seasonal. Especially increased in the cold months due to seasonal immune depression. The influenza virus H. influenzae is a pathogen with a higher prevalence in the winter months.In order to assess the susceptibility to infections, according to season and age the cross-frequency table and the chi-square test have been performed, and there is no statistically relevant dependence relationship between these variables.Of the 102 patients, 74.51% had a history of respiratory ailments. The most frequent conditions encountered in the antecedents, within this group, were an acute respiratory failure (29.4%) and pneumonia (33.3%).For our study group, in the case of the type of therapy used, a quasi-symmetrical distribution could be observed, where 49.02% of the subjects benefited from double or triple antibiotic therapy, while 50.98% benefited from mono antibiotic therapy.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"93 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86975820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Roxana-Elena Bogdan-Goroftei, D. Ciortea, Raisa-Eloise Barbu, Pompiliu-Mircea Bogdan, L. Nitoi, Corina Cecilia Manole Pălivan
"Polytrauma" is a term frequently used in the practice and literature of trauma specialties. This term refers to a series of multiple injuries at the level of several organs or systems, in contrast to isolated traumatic injuries, where a single injury is encountered [Marsden NJ, 2022].Millions of patients with polytrauma require medical care, some of them suffering injuries that will lead to lifestyle changes with the limitation of multiple activities. Globally, road collision is the leading cause of traumatic death, followed by suicide and homicide [Marsden NJ, 2022]."Golden hour" expression coined by Professor Richard Cowley, concludes that most deaths due to polytrauma occur in the first 60 minutes after injury [Marsden NJ, 2022].Following the research carried out on deaths from traumatic causes, a trimodal distribution was highlighted from them: immediately, early and late. The first 2 represent 80% of all traumatic deaths, occurring in the first hours after the injury, either due to brain injuries or major exsanguination. On the other hand, late deaths occur within days to weeks of trauma, secondary to sepsis or multiple organ failure [Marsden NJ, 2022].
{"title":"EPIDEMIOLOGICAL ASPECTS OF POLYTRAUMATISM IN THE PEDIATRIC POPULATION","authors":"Roxana-Elena Bogdan-Goroftei, D. Ciortea, Raisa-Eloise Barbu, Pompiliu-Mircea Bogdan, L. Nitoi, Corina Cecilia Manole Pălivan","doi":"10.35219/efms.2022.2.05","DOIUrl":"https://doi.org/10.35219/efms.2022.2.05","url":null,"abstract":"\"Polytrauma\" is a term frequently used in the practice and literature of trauma specialties. This term refers to a series of multiple injuries at the level of several organs or systems, in contrast to isolated traumatic injuries, where a single injury is encountered [Marsden NJ, 2022].Millions of patients with polytrauma require medical care, some of them suffering injuries that will lead to lifestyle changes with the limitation of multiple activities. Globally, road collision is the leading cause of traumatic death, followed by suicide and homicide [Marsden NJ, 2022].\"Golden hour\" expression coined by Professor Richard Cowley, concludes that most deaths due to polytrauma occur in the first 60 minutes after injury [Marsden NJ, 2022].Following the research carried out on deaths from traumatic causes, a trimodal distribution was highlighted from them: immediately, early and late. The first 2 represent 80% of all traumatic deaths, occurring in the first hours after the injury, either due to brain injuries or major exsanguination. On the other hand, late deaths occur within days to weeks of trauma, secondary to sepsis or multiple organ failure [Marsden NJ, 2022].","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"16 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87766390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Roxana-Elena Bogdan-Goroftei, Raisa-Eloise Barbu, M. Marinescu, I. Moraru, Pompiliu-Mircea Bogdan, C. Guțu, D. Ciortea, Anca Ștefanopol
Globally, there are many efforts to reduce the incidence of road accidents. However, the number of patients hospitalized with polytrauma is still high, with approximately 5.8 million deaths associated with traumatic injuries annually. Among the young, active age population, trauma is the current domain and timing a major cause of severe illness.Therefore we aimed by this study to evaluate comparatively the incidence of polytraumas among young adult patients presented in the Emergency - department (information obtained from the archive of the Emergency Clinical Hospital Sfântul Apostol Andrei Galați – 129 young patients) and pediatric subjects from a group of 710 children.The data obtained following the anamnesis, the clinical and paraclinical examination of the patients, were entered into the IBM SPSS Statistics 24 and Excel 2019, then sorted and filtered according to different criteria. In both groups, the incidence of male patients is statistically noticeable and also aspects regarding high frequency according to definite spring seasonality, and paraclinical, clinical, and sociodemographic elements.
在全球范围内，为减少道路事故发生率作出了许多努力。然而，多发创伤住院患者的数量仍然很高，每年约有580万人死于创伤性损伤。在年轻，活跃的年龄人口中，创伤是当前的领域和时间严重疾病的主要原因。因此，本研究的目的是比较评估急诊科年轻成人患者(资料来自急诊临床医院sfntul Apostol Andrei Galați档案- 129名年轻患者)和710名儿童中多创伤的发生率。将患者的临床和临床旁检查数据录入IBM SPSS Statistics 24和Excel 2019，按不同标准进行分类筛选。在两组中，男性患者的发病率在统计上是显著的，并且根据确定的春季季节性以及临床旁、临床和社会人口学因素，也存在高频率方面的问题。
{"title":"COMPARATIVE STUDY OF POLYTRAUMA WITHIN A GROUP OF 2004 PATIENTS (PEDIATRICS AND YOUNG ADULTS)","authors":"Roxana-Elena Bogdan-Goroftei, Raisa-Eloise Barbu, M. Marinescu, I. Moraru, Pompiliu-Mircea Bogdan, C. Guțu, D. Ciortea, Anca Ștefanopol","doi":"10.35219/efms.2022.2.02","DOIUrl":"https://doi.org/10.35219/efms.2022.2.02","url":null,"abstract":"Globally, there are many efforts to reduce the incidence of road accidents. However, the number of patients hospitalized with polytrauma is still high, with approximately 5.8 million deaths associated with traumatic injuries annually. Among the young, active age population, trauma is the current domain and timing a major cause of severe illness.Therefore we aimed by this study to evaluate comparatively the incidence of polytraumas among young adult patients presented in the Emergency - department (information obtained from the archive of the Emergency Clinical Hospital Sfântul Apostol Andrei Galați – 129 young patients) and pediatric subjects from a group of 710 children.The data obtained following the anamnesis, the clinical and paraclinical examination of the patients, were entered into the IBM SPSS Statistics 24 and Excel 2019, then sorted and filtered according to different criteria. In both groups, the incidence of male patients is statistically noticeable and also aspects regarding high frequency according to definite spring seasonality, and paraclinical, clinical, and sociodemographic elements.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"87 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87314606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-12DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.02
Cristian Ion
We study the h−vector and the Hilbert function of the vertex cover algebra (A)G, introduced and first studied by J. Herzog, T. Hibi and N. V. Trung ([6]), for a special class of bipartite graphs, namely for Cohen-Macaulay bipartite graphs.
对于一类特殊的二部图，即Cohen-Macaulay二部图，我们研究了由J. Herzog, T. Hibi和N. V. Trung([6])首先提出并研究的顶点覆盖代数(A)G的h−向量和Hilbert函数。
{"title":"On the Hilbert function of vertex cover algebras of Cohen-Macaulay bipartite graphs","authors":"Cristian Ion","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.02","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.02","url":null,"abstract":"We study the h−vector and the Hilbert function of the vertex cover algebra (A)G, introduced and first studied by J. Herzog, T. Hibi and N. V. Trung ([6]), for a special class of bipartite graphs, namely for Cohen-Macaulay bipartite graphs.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"52 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73805758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-12DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.06
R. Drasovean, S. Condurache-Bota
Heavy metals emitted from anthropogenic activities can be transported into the atmosphere over long distances and can have significant negative effects on human health and the environment. Heavy metals are toxic pollutants that act on various organs and systems of the human body, their effects being specific to each substance. Because of their reduced mobility, heavy metals are concentrated at each trophic level, the highest concentration being reached at the ends of food chains, where, most of the times, humans stand. This paper presents the spatial and temporal evolution of heavy metals concentrations in the Southeastern part of Romania. The Southeastern region we studied included the counties of: Braila, Buzau, Constanta, Galati and Tulcea, respectively. The database of the Romanian National Air Quality Monitoring Network (RNMCA) was used for this study.The data taken from the RNMCA network consisted in the concentrations of As, Cd, Ni and Pb, respectively, which were recorded between January 2020 and May 2022. The monthly evolution of the chosen pollutants was studied. Pearson and Spearman correlations were used in order to study the influence of climatic factors on the heavy metals pollutants.
{"title":"Study of the evolution of heavy metals emissions in the southeastern part of Romania","authors":"R. Drasovean, S. Condurache-Bota","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.06","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.06","url":null,"abstract":"Heavy metals emitted from anthropogenic activities can be transported into the atmosphere over long distances and can have significant negative effects on human health and the environment. Heavy metals are toxic pollutants that act on various organs and systems of the human body, their effects being specific to each substance. Because of their reduced mobility, heavy metals are concentrated at each trophic level, the highest concentration being reached at the ends of food chains, where, most of the times, humans stand. This paper presents the spatial and temporal evolution of heavy metals concentrations in the Southeastern part of Romania. The Southeastern region we studied included the counties of: Braila, Buzau, Constanta, Galati and Tulcea, respectively. The database of the Romanian National Air Quality Monitoring Network (RNMCA) was used for this study.The data taken from the RNMCA network consisted in the concentrations of As, Cd, Ni and Pb, respectively, which were recorded between January 2020 and May 2022. The monthly evolution of the chosen pollutants was studied. Pearson and Spearman correlations were used in order to study the influence of climatic factors on the heavy metals pollutants.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"10 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81035698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-12DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.03
A. Sion, A. Ene
In general, the total content of heavy metals and trace elements in soils is useful, but the speciation (bioavailability) is also in need for agricultural purpose, for example. The present paper studies the efficiency of some soil remediation treatments on soils polluted, especially with copper, by using sequential chemical extraction (SCE). Usually, SCE is fractioned, according to Tessier, in five fractions: exchangeable, carbonate bound, Fe and Mn oxide bound, organic matter bound and residual. Copper (Cu) is one of the contaminants found in many soils around the world. In small concentration, it is an essential microelement for plants and organisms, but in high concentrations, it is harmful for the entire ecosystem. Because the concentrations of Cu are associated with soil texture and several other parameters, many remediation soil treatments are based on organic mixture, by converting the element into a less exchangeable form, and thus less bioavailable. In this study, the efficiency of organic amendments such as organic matter (OM), zero-valent iron with organic matter (OMZ), dolomite (DL) and organic matter with dolomite (OMDL) are investigated. These treatments were applied on soils affected by Cu pollution. The results indicated that OMDL and OMZ treatments had the best efficiency on Cu pollution, by enhancing the stability of the element, decreasing the level of bioavailability.
{"title":"Sequential chemical extraction of copper from clay: an overview","authors":"A. Sion, A. Ene","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.03","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.03","url":null,"abstract":"In general, the total content of heavy metals and trace elements in soils is useful, but the speciation (bioavailability) is also in need for agricultural purpose, for example. The present paper studies the efficiency of some soil remediation treatments on soils polluted, especially with copper, by using sequential chemical extraction (SCE). Usually, SCE is fractioned, according to Tessier, in five fractions: exchangeable, carbonate bound, Fe and Mn oxide bound, organic matter bound and residual. Copper (Cu) is one of the contaminants found in many soils around the world. In small concentration, it is an essential microelement for plants and organisms, but in high concentrations, it is harmful for the entire ecosystem. Because the concentrations of Cu are associated with soil texture and several other parameters, many remediation soil treatments are based on organic mixture, by converting the element into a less exchangeable form, and thus less bioavailable. In this study, the efficiency of organic amendments such as organic matter (OM), zero-valent iron with organic matter (OMZ), dolomite (DL) and organic matter with dolomite (OMDL) are investigated. These treatments were applied on soils affected by Cu pollution. The results indicated that OMDL and OMZ treatments had the best efficiency on Cu pollution, by enhancing the stability of the element, decreasing the level of bioavailability.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"56 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86613144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-12DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.05
S. Condurache-Bota, R. Drasovean, G. Popa
Air pollution is increasing in the context of uncontrolled emissions from human activities, mostly from industry, transportation and agriculture. Urban agglomerations concentrate most environmental pollution sources, given the high population density and their needs of transportation and energy, both of electrical and thermal types, along with huge quantities of wastes, whose improper management leads to heavy pollutant emissions in atmosphere, but also to pollutant leakage in waters and soil. In general, in each country, at least in Europe, the capital is the most populated city, which also concentrates important industrial sites, leading to poor air quality. This affects the population both on short and long term. Studies have shown that air pollution even induces chronic diseases, not only of respiratory-type, but also of the heart, up till reducing life expectancy. When dealing with urban air pollution, one must also consider the physical-geographical conditions, which may accentuate or, on the contrary, may diminish pollution through an intense air circulation, thus dispersing pollutants.A selection of European capitals was chosen for the study presented here, as related to their air quality which was monitored for short term within the peak of the recent pandemic, in order to have a view and even a reference of the expected reduced pollution status as compared to the normal urban life conditions. The chosen capitals were: Paris, Berlin, Bucharest and Skopje, which are well-spread geographically across Europe and also have different economic statuses, along with different landscape conditions and climate influences, making them appropriate for comparison, differences being expected.
{"title":"Short-term atmospheric pollution monitoring in a selection of European capitals","authors":"S. Condurache-Bota, R. Drasovean, G. Popa","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.05","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.05","url":null,"abstract":"Air pollution is increasing in the context of uncontrolled emissions from human activities, mostly from industry, transportation and agriculture. Urban agglomerations concentrate most environmental pollution sources, given the high population density and their needs of transportation and energy, both of electrical and thermal types, along with huge quantities of wastes, whose improper management leads to heavy pollutant emissions in atmosphere, but also to pollutant leakage in waters and soil. In general, in each country, at least in Europe, the capital is the most populated city, which also concentrates important industrial sites, leading to poor air quality. This affects the population both on short and long term. Studies have shown that air pollution even induces chronic diseases, not only of respiratory-type, but also of the heart, up till reducing life expectancy. When dealing with urban air pollution, one must also consider the physical-geographical conditions, which may accentuate or, on the contrary, may diminish pollution through an intense air circulation, thus dispersing pollutants.A selection of European capitals was chosen for the study presented here, as related to their air quality which was monitored for short term within the peak of the recent pandemic, in order to have a view and even a reference of the expected reduced pollution status as compared to the normal urban life conditions. The chosen capitals were: Paris, Berlin, Bucharest and Skopje, which are well-spread geographically across Europe and also have different economic statuses, along with different landscape conditions and climate influences, making them appropriate for comparison, differences being expected.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"48 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73145239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-12DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.13
I. Cretescu, R. Borodaev, D. Lutic, G. Soreanu, L. Lazar, Joakim Gitlestad, E. Zubcov
The monitoring of the Danube River water quality was performed by using a complex device including dissolved oxygen (DO), pH, redox potential (ORP) and temperature measurements, installed on a passenger cruise ship traveling between Tulcea and Sulina. This ship equipped with the water monitoring station served as a mobile device during the daytime cruise along the Sulina channel and as a fixed one when the ship was docking in Tulcea or Sulina ports, including the nighttime. The values of the Eh and rH revealed that apart from the assumed dissolved oxygen, other species of peroxide types are supposed to form in the natural water by complex biologic mechanisms.
{"title":"Redox state assessment for the Danube water in the Sulina channel using a mobile water quality monitoring station","authors":"I. Cretescu, R. Borodaev, D. Lutic, G. Soreanu, L. Lazar, Joakim Gitlestad, E. Zubcov","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.13","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.13","url":null,"abstract":"The monitoring of the Danube River water quality was performed by using a complex device including dissolved oxygen (DO), pH, redox potential (ORP) and temperature measurements, installed on a passenger cruise ship traveling between Tulcea and Sulina. This ship equipped with the water monitoring station served as a mobile device during the daytime cruise along the Sulina channel and as a fixed one when the ship was docking in Tulcea or Sulina ports, including the nighttime. The values of the Eh and rH revealed that apart from the assumed dissolved oxygen, other species of peroxide types are supposed to form in the natural water by complex biologic mechanisms.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"53 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85495162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-12DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.04
S. Moldovanu, Iulia-Nela Anghelache Nastase, M. Miron, L. Moraru
This study aims to examine and compare the performances of Random Forest (RF) and k-Nearest Neighbor (k-NN) algorithms used for classification based on certain geometric features. For the purpose of the analysis, the Breast Cancer Wisconsin (BCW) public dataset is used. BCW dataset contains features like area, perimeter, radius, compactness, and symmetry computed from 357 benign, and 212 malignant breast images, respectively. Three different experiments related to the size of training and testing datasets for classification are conducted and different accuracy values are obtained. The best accuracy of 91.9% for RF and 91.3% for kNN, respectively, are reached when 30% of the entire dataset is used as testing dataset. For all experiments, the RF classifier outperformed the kNN.
{"title":"Performance comparison of two non-parametric classifiers for classification using geometric features","authors":"S. Moldovanu, Iulia-Nela Anghelache Nastase, M. Miron, L. Moraru","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.04","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.04","url":null,"abstract":"This study aims to examine and compare the performances of Random Forest (RF) and k-Nearest Neighbor (k-NN) algorithms used for classification based on certain geometric features. For the purpose of the analysis, the Breast Cancer Wisconsin (BCW) public dataset is used. BCW dataset contains features like area, perimeter, radius, compactness, and symmetry computed from 357 benign, and 212 malignant breast images, respectively. Three different experiments related to the size of training and testing datasets for classification are conducted and different accuracy values are obtained. The best accuracy of 91.9% for RF and 91.3% for kNN, respectively, are reached when 30% of the entire dataset is used as testing dataset. For all experiments, the RF classifier outperformed the kNN.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"92 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82683814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-12DOI: 10.35219/ann-ugal-math-phys-mec.2022.2.11
C. Dima
Vehicle scheduling problem consists in assigning vehicles to a set of time-tabled trips, wishing to minimize the objective cost function. Two aprroaches of the problem were studied: single-depot vehicle scheduling problem (SDVSP) and multiple-depot vehicle scheduling problem (MDVSP). There are known several methos of solving this problem based mainly on liniar programming, branch and bound, graph colouring thechniques. SDVSP is solvable in polynomial time, while MDSVP is NP hard. The main propose of this paper is to present a model based on Petri nets for the vehicle sceduling problem. We defined priced timed workflow nets as a suitable model for SDVSP. We tried to emphasize the advantages of using Petri nets in order to describe this kind of planning problems.
{"title":"A Petri net model for vehicle scheduling problem","authors":"C. Dima","doi":"10.35219/ann-ugal-math-phys-mec.2022.2.11","DOIUrl":"https://doi.org/10.35219/ann-ugal-math-phys-mec.2022.2.11","url":null,"abstract":"Vehicle scheduling problem consists in assigning vehicles to a set of time-tabled trips, wishing to minimize the objective cost function. Two aprroaches of the problem were studied: single-depot vehicle scheduling problem (SDVSP) and multiple-depot vehicle scheduling problem (MDVSP). There are known several methos of solving this problem based mainly on liniar programming, branch and bound, graph colouring thechniques. SDVSP is solvable in polynomial time, while MDSVP is NP hard. The main propose of this paper is to present a model based on Petri nets for the vehicle sceduling problem. We defined priced timed workflow nets as a suitable model for SDVSP. We tried to emphasize the advantages of using Petri nets in order to describe this kind of planning problems.","PeriodicalId":43589,"journal":{"name":"Annals of the University Dunarea de Jos of Galati, Fascicle VI-Food Technology","volume":"8 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77017078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：