Assessment of the human exposure to transient and time-harmonic fields using the enhanced transmission line theory approach

The paper deals with the assessment of human exposure to the transient electromagnetic fields and high-frequency (HF) radiation. The formulation of the problem is based on a simplified cylindrical representation of the human body. The analysis is based on the enhanced transmission line (TL) theory. For this purpose, in order to quantify the induced current inside the human body, we solve linear system equations, where the electromagnetic field excitation is represented by two equivalent current and voltage generators. Once the axial current is determined, it is possible to calculate the specific absorption rate (SAR). Some illustrative computational examples are presented in the paper

Clique-cutsets beyond chordal graphs

Truemper configurations (thetas, pyramids, prisms, and wheels) have played an important role in the study of complex hereditary graph classes (eg, the class of perfect graphs and the class of even‐hole‐free graphs), appearing both as excluded configurations, and as configurations around which graphs can be decomposed. In this paper, we study the structure of graphs that contain (as induced subgraphs) no Truemper configurations other than (possibly) universal wheels and twin wheels. We also study several subclasses of this class. We use our structural results to analyze the complexity of the recognition, maximum weight clique, maximum weight stable set, and optimal vertex coloring problems for these classes. Furthermore, we obtain polynomial x-bounding functions for these classes

Influence of Sex, Age and Presence of Functional Units on Optical Density and Bone Height of the Mandible in the Elderly

OBJECTIVES: Mandibular bone height and density were compared with age, sex and the number and type of functional dental units, as represented by Eichner index. MATERIAL AND METHODS: A sample of 150 elderly patients of the Dental Clinic were divided into three age groups, examined and orthopantomograms/OPG/ taken. The OPGs were taken with the copper stepwedge in order to enable computer-assisted calculation of mandibular optical density and calibration of dimensional measurements by specially designed software. RESULTS:Eichner class III was found in 62% of patients. The presence of functional units was positively correlated with age (r=0.67) and bone height values (r=0.88, p<0.05). Optical density and bone height values of measurements performed at the same locations on mandibles showed no significant correlation (r=0.24, p<0.05). Intra-subject measurement showed that the eminentia piriformis region had significantly higher optical density values compared to 1st molar and mental foramen regions (p<0.05). Women had significantly lower bone height values than men (p<0.05), but no significant sex difference was found in optical density values. CONCLUSION: The presence of functional units has significant influence on bone height, although, like age or sex of the patient, it has no influence on mineral content of the mandible. The eminentia piriformis is not susceptible to bone mineral content or height change

Influence of Sex, Age and Presence of Functional Units on Optical Density and Bone Height of the Mandible in the Elderly

OBJECTIVES: Mandibular bone height and density were compared with age, sex and the number and type of functional dental units, as represented by Eichner index. MATERIAL AND METHODS: A sample of 150 elderly patients of the Dental Clinic were divided into three age groups, examined and orthopantomograms/OPG/ taken. The OPGs were taken with the copper stepwedge in order to enable computer-assisted calculation of mandibular optical density and calibration of dimensional measurements by specially designed software. RESULTS:Eichner class III was found in 62% of patients. The presence of functional units was positively correlated with age (r=0.67) and bone height values (r=0.88, p<0.05). Optical density and bone height values of measurements performed at the same locations on mandibles showed no significant correlation (r=0.24, p<0.05). Intra-subject measurement showed that the eminentia piriformis region had significantly higher optical density values compared to 1st molar and mental foramen regions (p<0.05). Women had significantly lower bone height values than men (p<0.05), but no significant sex difference was found in optical density values. CONCLUSION: The presence of functional units has significant influence on bone height, although, like age or sex of the patient, it has no influence on mineral content of the mandible. The eminentia piriformis is not susceptible to bone mineral content or height change

The knowledge of zoonotic diseases in swine producers, veterinarians and swine industry allied personnel in Ontario, Canada

More than 70% of swine marketed in Canada come from the Canadian Quality Assurance (QGA®) program, established in 1998 with the main purpose of demonstrating the implementation of on-farm good production practices (GPP)

Improved FPT algorithms for weighted independent set in bull-free graphs

Very recently, Thomass\'e, Trotignon and Vuskovic [WG 2014] have given an FPT algorithm for Weighted Independent Set in bull-free graphs parameterized by the weight of the solution, running in time $2^{O(k^5)} \cdot n^9$. In this article we improve this running time to $2^{O(k^2)} \cdot n^7$. As a byproduct, we also improve the previous Turing-kernel for this problem from $O(k^5)$ to $O(k^2)$. Furthermore, for the subclass of bull-free graphs without holes of length at most $2p-1$ for $p \geq 3$, we speed up the running time to $2^{O(k \cdot k^{\frac{1}{p-1}})} \cdot n^7$. As $p$ grows, this running time is asymptotically tight in terms of $k$, since we prove that for each integer $p \geq 3$, Weighted Independent Set cannot be solved in time $2^{o(k)} \cdot n^{O(1)}$ in the class of $\{bull,C_4,\ldots,C_{2p-1}\}$-free graphs unless the ETH fails.Comment: 15 page

On Multiple-Resonator-based Implementation of IEC/IEEE Standard P-Class Compliant PMUs

This article deals with the implementation of the P-Class PMU compliant with IEC/IEEE Standard 60255-118-1:2018 by usage of a multiple-resonator (MR)-based approach for harmonic analysis having been proposed recently. In previously published articles, it has been shown that a trade-off between opposite requirements is possible by shifting a measurement time stamp along the filter window. Positioning the time stamp in a proximity of the time window center assures flat-top frequency responses. In this article, through simulation tests carried out under various conditions, it is shown that requirements of the IEC/IEEE Standard 60255-118-1:2018 can be satisfied by the second and third order MR structure for particular conditions of the time stamp location

A36 Prevalence of HIV-1 subtypes in Slovenia with an emphasis on molecular and phylogenetic investigation of subtype A

21st International BioInformatics Workshop on Virus Evolution and Molecular EpidemiologyIn Slovenia, a small country in Central Europe, less than 1 per 1,000 inhabitants are estimated to be infected with HIV-1. As in most of the Central and Western European countries, the majority of patients diagnosed with HIV-1 are infected with subtype B. However, due to migration, other subtypes can become more prevalent in the country. The aim of this study was to determine HIV-1 subtypes circulating in Slovenia and to further examine the molecular epidemiology of subtype A. A total of 367 Slovenian HIV-1 sequences were included in the study, representing 58% of all patients diagnosed in Slovenia until the end of the year 2013. Subtype was assigned by employing different HIV subtyping tools coupled with Maximum likelihood phylogenetic analysis. The latter was performed to examine the molecular epidemiology of subtype A as well. Identified clusters of Slovenian subtype A sequences were further analyzed for the determination of the time of the most recent common ancestor (tMRCA) by using Monte Carlo Markov chain (MCMC) method available in BEAST 2.1.3 software. We determined the prevalence of subtype B to be 85.3%, while subtype A was the most prevalent non-B subtype found in 18 patients (4.9%), followed by CRF02_AG (2.4%), subtype C (1.1%), subtypes D, G and CRF01_AE (0.8% each) and subtypes F1 and CRF22_01A1 (0.3% each). Subtypes could not be assigned to 12 sequences (3.3%). The phylogenetic tree obtained by ML analysis of the subtype A and subtype A related recombinants revealed that Slovenian sequences were part of 6 major international clusters. Two clusters consisting only of Slovenian sequences were identified and thus additional MCMC analysis was employed. Results of a Slovenian cluster of 4 subtype A sequences showed a posterior probability value of 1 and a tMRCA between the years 1985 and 2008, with a mean in the year 2001. In conclusion, in a Central European country, where subtype B predominates, the second most common subtype was found to be subtype A. Non-B subtypes were observed in one out of seven patients in Slovenia, a fraction that is not negligible, thus proving importance of surveillance of HIV subtype diversity and corresponding molecular epidemiology of non-B subtypes.publishersversionpublishe

A new Task for Pharmacists: Working at a Computer

Cilj je ovog rada bio utvrditi koliko rad s računalom utječe na promjene vidnih funkcija ljekarnika te na pojavu smetnji na vratnom dijelu kralježnice. U presječnom istraživanju ispitane su vidne funkcije i subjektivne smetnje pri radu 50 ljekarnika (srednja dob 41,8±11 godina), te 56 službenika (srednja dob 36,2±8,6 godina), koji 40 sati tjedno rade na računalu. Pri tome, ljekarnici pretežno stoje, a službenici sjede. Od subjektivnih smetnji pri radu, suzenje očiju i bolovi u vratnoj kralježnici bili su značajno češći u skupini ljekarnika (P0,05). Rezultati potkrepljuju odredbu Pravilnika o sigurnosti i zaštiti zdravlja pri radu s računalom (1) prema kojoj poslodavac mora planirati aktivnosti radnika na osobnom računalu tako da se rad periodički izmjenjuje s drugim aktivnostima. To se upravo događa pri obavljanju posla ljekarnika. Njegov rad s računalom se neprekidno izmjenjuje s obraćanjem klijentu, odnosno s izdavanjem lijeka. Za rješavanje poteškoća s kralježnicom treba tijekom svakog sata rada osigurati odmore u trajanju od najmanje 5 minuta te organizirati vježbe rasterećenja radi smanjenja statodinamičnoga napora.The aim of this study was to establish the effect of working at personal computers (PC) on vision and neck-pain in pharmacists. In this cross-sectional study, vision and subjective disturbances at work were examined in 50 pharmacists [mean age (41.8±11) years] and 56 offi ce workers [mean age (36.2±8.6) years] using PCs at work for 40 hours per week. Pharmacists work mostly in the standing position and office workers in the sitting position. Excessive lacrimation and neck-pain during work were more pronounced in pharmacists than in office workers (P0.05). Our results support the recommendations set by the Ordinance on Safety and Health Protection when Working with Personal Computers (1), that employer should make sure that work with screen interchanges regularly with other activities in order to diminish vision load at work. This also refers to the work of pharmacists because their activities involve continuous interchanges between serving customers, looking at PC screen, and issuing medicines. In addition, the pharmacists should take at least 5-minute breaks every hour and take relaxation exercises to diminish the strain for the spine