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The spectral determinations of the join of two friendship graphs
Ali Zeydi Abdian,Amirhossein Morovati Moez 호남수학회 2019 호남수학학술지 Vol.41 No.1
The main aim of this study is to characterize new classes of multicone graphs which are determined by their adjacency spectra, their Laplacian spectra, their complement with respect to signless Laplacian spectra and their complement with respect to their adjacency spectra. A multicone graph is defined to be the join of a clique and a regular graph. If $n$ is a positive integer, a friendship graph $ F_n $ consists of $n$ edge-disjoint triangles that all of them meet in one vertex. It is proved that any connected graph cospectral to a multicone graph $ F_n\bigtriangledown F_n=K_2\bigtriangledown nK_2\bigtriangledown nK_2 $ is determined by its adjacency spectra as well as its Laplacian spectra. In addition, we show that if $ n\neq 2 $, the complement of these graphs are determined by their adjacency spectra. At the end of the paper, it is proved that multicone graphs $ F_n\bigtriangledown F_n=K_2\bigtriangledown nK_2\bigtriangledown nK_2 $ are determined by their signless Laplacian spectra and also we prove that any graph cospectral to one of multicone graphs $ F_n\bigtriangledown F_n $ is perfect.
THE SPECTRAL DETERMINATIONS OF THE JOIN OF TWO FRIENDSHIP GRAPHS
Abdian, Ali Zeydi,Moez, Amirhossein Morovati The Honam Mathematical Society 2019 호남수학학술지 Vol.41 No.1
The main aim of this study is to characterize new classes of multicone graphs which are determined by their adjacency spectra, their Laplacian spectra, their complement with respect to signless Laplacian spectra and their complement with respect to their adjacency spectra. A multicone graph is defined to be the join of a clique and a regular graph. If n is a positive integer, a friendship graph $F_n$ consists of n edge-disjoint triangles that all of them meet in one vertex. It is proved that any connected graph cospectral to a multicone graph $F_n{\nabla}F_n=K_2{\nabla}nK_2{\nabla}nK_2$ is determined by its adjacency spectra as well as its Laplacian spectra. In addition, we show that if $n{\neq}2$, the complement of these graphs are determined by their adjacency spectra. At the end of the paper, it is proved that multicone graphs $F_n{\nabla}F_n=K_2{\nabla}nK_2{\nabla}nK_2$ are determined by their signless Laplacian spectra and also we prove that any graph cospectral to one of multicone graphs $F_n{\nabla}F_n$ is perfect.
Abolghasem Siyadatpanah,Davood Anvari,Amir Emami Zeydi,Seyed Abdollah Hosseini,Ahmad Daryani,Shahabeddin Sarvi,Christine M,Budke,Reza Esmaeelzadeh Dizaji,Mohammad Ali Mohaghegh,Mohammad Hasan Kohansal 한국역학회 2019 Epidemiology and Health Vol.41 No.-
Human echinococcosis is an infectious disease caused by tapeworms belonging to the species Echinococcus. This parasite has a worldwide distribution and is considered a neglected tropical disease by the World Health Organization. Due to the diversity of Echinococcus spp. hosts, as well as variation in geographical, climatic, and socio-ethnic conditions, the question of the strains or genotypes of Echinococcus spp. that are involved in human infections is important. The aim of this study was to provide a summary of the available data on genotypes of Echinococcus obtained from the Iranian population. Four international databases (PubMed, Scopus, Science Direct, and Web of Science) and 4 Persian databases (Magiran, Scientific Information Database, Iran Medex, and IranDoc) were searched for cross-sectional studies that reported the genotypes of Echinococcus spp. in human echinococcosis cases using molecular methods in Iran through July 2018. The Newcastle-Ottawa Scale was used to assess the quality of the selected studies. A total of 559 cases of human cystic echinococcosis were reported in the 21 included articles. The majority of cases belonged to genotype G1 (89.2%; 95% confidence interval [CI], 80.1 to 95.8), genotype G6 (8.2%; 95% CI, 2.8 to 15.9), and genotype G3 (2.3%; 95% CI, 1.1 to 3.9). Since genotype G1 of Echinococcus appears to be the most prevalent genotype affecting humans in Iran, disease control initiatives aimed at sheep intermediate hosts may be the most beneficial. In addition, educational programs and serological screening in individuals may help reduce the national impact of the disease.
Medication errors among Iranian emergency nurses: a systematic review
Zohreh Hosseini Marznaki,Somaye Pouy,Waliu Jawula Salisu,Amir Emami Zeydi 한국역학회 2020 Epidemiology and Health Vol.42 No.-
OBJECTIVES: Medication errors (MEs) made by nurses are the most common errors in emergency departments (EDs). Identifying the factors responsible for MEs is crucial in designing optimal strategies for reducing such occurrences. The present study aimed to review the literature describing the prevalence and factors affecting MEs among emergency ward nurses in Iran. METHODS: We searched electronic databases, including the Scientific Information Database, PubMed, Cochrane Library, Web of Science, Scopus, and Google Scholar, for scientific studies conducted among emergency ward nurses in Iran. The studies were restricted to full-text, peer-reviewed studies published from inception to December 2019, in the Persian and English languages, that evaluated MEs among emergency ward nurses in Iran. RESULTS: Eight studies met the inclusion criteria. Most of the nurses (58.9%) had committed MEs only once. The overall mean rate of MEs was 46.2%, and errors made during drug administration accounted for 41.7% of MEs. The most common type of administration error was drug omission (17.8%), followed by administering drugs at the wrong time (17.5%) and at an incorrect dosage (10.6%). The lack of an adequate nursing workforce during shifts and improper nurse-patient ratios were the most critical factors affecting the occurrence of MEs by nurses. CONCLUSIONS: Despite the increased attention on patient safety in Iran, MEs by nurses remain a significant concern in EDs. Therefore, nurse managers and policy-makers must take adequate measures to reduce the incidence of MEs and their potential negative consequences.