bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Efficiency of OLS Estimators of Structural Parameters in a Simple Linear Regression Model in the Calibration of the Averages Scheme
Authors: Kowal Robert 
Published: April 2017

AbstractA simple linear regression model is one of the pillars of classic econometrics. Multiple areas of research function within its scope. One of the many fundamental questions in the model concerns proving the efficiency of the most commonly used OLS estimators and examining their properties. In the literature of the subject one can find taking back to this scope and certain solutions in that regard. Methodically, they are borrowed from the multiple regression model or also from a boundary partial model. Not everything, however, is here complete and consistent. In the paper a completely new scheme is proposed, based on the implementation of the Cauchy-Schwarz inequality in the arrangement of the constraint aggregated from calibrated appropriately secondary constraints of unbiasedness which in a result of choice the appropriate calibrator for each variable directly leads to showing this property. A separate range-is a matter of choice of such a calibrator. These deliberations, on account of the volume and kinds of the calibration, were divided into a few parts. In the one the efficiency of OLS estimators is proven in a mixed scheme of the calibration by averages, that is preliminary, and in the most basic frames of the proposed methodology. In these frames the future outlines and general premises constituting the base of more distant generalizations are being created.
Note to “Rates of Return on Open-End Debt Investment Funds and Bank Deposits in Poland in the years 1995–2015 – A Comparative Analysis” Folia Oeconomica Stetinensia 16 (1), (2016), 93–112
Authors: Piasecki Krzysztof 
Published: April 2017

Abstract
The main goal of this paper is a discussion on the correct choice of annualized return rate. Selected return rate should be appropriate for the multiannual comparative analysis of bank deposits and investment funds. The whole discussion was based on theoretical considerations and a numerical experiment.
Effect of Training at Lactate Threshold Intensity on Maximal Time to Exhaustion, Depression and Anxiety Behaviour of Spontaneously Hypertensive Rats after Kainate-Induced Status Epilepticus
Authors: Georgieva Katerina N. , Hadjieva Margarita S. , Shishmanova-Doseva Mihaela S. , Terzieva Dora D. , Georgiev Nikola G. , Andreev Georgi G. , Tchekalarova Jana D. 
Published: April 2017

Abstract
Aim: The objective of the present study was to investigate the effect of treadmill training at lactate threshold intensity on maximum time to exhaustion (MTE) and heart rate (HR) as well as behavioral changes after kainate (KA)-induced status epilepticus (SE) of spontaneously hypertensive rats (SHRs).
Materials and methods: Male SHRs were divided in four groups: two sedentary (vehicle- and KA-treated) and two exercised (vehicle- and KA-treated), respectively. The exercised rats were trained on a treadmill at a speed of 20 m.min-1 and 0° elevation for 40 min.d-1, for 4 wk. Maximal time to exhaustion and HR was measured at the beginning and at the end of the training period. Status epilepticus was evoked in half of the sedentary and trained rats by a repetitive intraperitoneal injection of KA in low subconvulsive doses. The other half of the groups received saline. Sucrose preference test (SPT) for depression-like behavior and hole board test (HBT) for impulsivity were performed a month after KA/veh injection.
Results: The maximum time of exhaustion was elongated in the SHRs at the end of the training period in comparison with the beginning. However, no effect on HR was detected in trained rats. Kainate treatment after one month of training alleviated the SE-induced anhedonia in SPT and stereotyped behavior in HBT, respectively.
Conclusions: Taken together, these results demonstrate that exercise exerts a beneficial influence on physical working capacity, depression and impulsive behavior in a co-morbid model of essential hypertension and SE.
Epidemiological Study of Hepatitis A Infection in Eastern Bulgaria
Authors: Tsankova Gabriela St. , Todorova Tatina T. , Ermenlieva Neli M. , Popova Tsvetelina K. , Tsankova Dayana T. 
Published: April 2017

Abstract
Background: Hepatitis A virus (HAV) infection is an acute, self-limited liver disease transmitted usually through the faecal-oral route via person-to-person contact. Bulgaria has intermediate HAV endemicity with higher susceptibility among adults and recurrent outbreaks.
Aim: As HAV infection is strongly related to human movements and represents a significant risk to travelers and migrants, as well as to local population receiving these groups, we set out to analyze the epidemiological data on hepatitis A in five of the largest tourist border regions of Bulgaria located in its eastern part: Varna, Shumen, Dobrich, Burgas and Yambol.
Materials and methods: We reviewed retrospectively all reported cases of acute hepatitis A in the eastern regions of Bulgaria over a 7-year period between 2008 and 2014.
Results: A total of 2879 newly infected patients were registered during the study period, the number varying widely: from 190 cases in 2014 to 923 in 2012. The average incidence of HAV was higher in the south-eastern regions than in the northeastern regions (55.30%000 vs 15.04%000 respectively, p < 0.0001). The most affected age group in all regions was the 5-9-year olds (p < 0.0001) and males were significantly more susceptible to HAV (p = 0.02).
Conclusion: Hepatitis A is still a major public health problem in Bulgaria; there is a significant difference in the incidence of the disease between the regions in the south-east and those in the north-east and between the different age groups and sexes.
Demographic and Comorbidity Pattern of Patients with Critical Limb Ischemia
Authors: Ciocan Răzvan A. , Bolboacă Sorana D. , Rădulescu Şerban , Stancu Bogdan , Ciocan Andra , Gherman Claudia D. 
Published: April 2017

Abstract
Aim: The present study aimed at identifying the pattern of patients with critical limb ischemia (CLI) compared with those with peripheral arterial occlusive disease (PAOD).
Materials and methods: A four-year retrospective study was conducted with patients hospitalized in the Second Surgical Clinic at the Emergency County Hospital Cluj-Napoca. The medical charts of patients with PAOD (n=466) and CLI (n=223) were reviewed and data were collected.
Results: The study included 689 patients; mean age 67 years for PAOD patients and 65 years for CLI patients. A significantly higher percentage of patients were male in both groups (79.25%, P < 0.0001). Most of the patients in both groups had received at least a secondary education (P < 0.0001). Most of the subjects in both groups were smokers (>71.30%) with no difference between groups (P = 0.566). No significant differences were found between the groups in comorbidities (diabetes, arterial blood hypertension, cardiac ischemia, rhythm disorders, P > 0.05). There were more CLI patients that were overweight than overweight patients with PAOD (P = 0.0004). High serum cholesterol (>200 mg/dL) and triglycerides (>150 mg/dL) levels were found in the CLI group (P < 0.05). Age was identified as a risk factors for amputation (OR = 1.03, 95%Cl [1.01−1.05], P = 0.0012).
Conclusions: The profile of a patient with critical limb ischemia and peripheral arterial occlusive disease is a 65-67-year-old male smoker with at least a secondary education. The CLI patient is overweight with pathological serum levels of cholesterol and triglycerides.
Systematic updates of the agglutinated foraminiferal genus Colominella Popescu, 1998: insights from sectioned specimens
Authors: Mancin Nicoletta , Kaminski Michael A. 
Published: April 2017

Abstract
The occurrence of agglutinated foraminiferal specimens belonging to the Badenian (middle Miocene) genus Colominella Popescu, 1998 was recently documented for the first time in a lower Pliocene succession of the western Mediterranean area. Direct comparisons with topotype specimens of Colominella paalzowi (Cushman 1936), sampled in the Badenian type section of Lăpugiu de Sus (Transylvania), show that the Pliocene individuals from the western Mediterranean morphologically resemble the type species C. paalzowi, but they also differ in possessing a longer biserial chamber arrangement with a higher number of internal chamber partitions, in lacking a clear early triserial stage and in having a more complex microstructure of the agglutinated wall, thereby supporting the idea that the Pliocene Mediterranean specimens represent a new, more highly evolved species. The fact that the Pliocene individuals from the Mediterranean appear to be more evolved with respect to the Badenian specimens from Paratethys represents an interesting evolutionary development of the genus Colominella that also permits the known stratigraphical and geographical range of the genus, previously limited to the middle Miocene (Badenian) of the Paratethys, to be extended.
The Campanian–Maastrichtian foraminiferal biostratigraphy of the basement sediments from the southern Pannonian Basin (Vojvodina, northern Serbia): implications for the continuation of the Eastern Vardar and Sava zones
Authors: Dunčić Milena , Dulić Ivan , Popov Olivera , Bogićević Goran , Vranjković Alan 
Published: April 2017

Abstract
Micropalaeontological and biostratigraphical studies included Campanian-Maastrichtian complexes from five oil exploration wells drilled in northern Serbia (Vojvodina): the first is a carbonate-clastic complex and second is a complex containing ophiolites intercalated with hemipelagic and pelagic sediments. Within the studied complexes, rich associations of planktonic and benthic foraminifera, calcareous nannoplankton, palynomorphs, as well as shallow and deep-water fossil detritus were determined. The presence of relatively rich associations of planktonic foraminifera allowed recognition of two biozones: the Globotruncana ventricosa Zone, observed in the sediments of the carbonate-clastic complex and the Gansserina gansseri Zone, observed in both complexes. Except biozones, based on documented index species, for some units in both complexes, larger benthic foraminifera species had special biostratigraphical value, and in some of them, the calcareous nannoplankton zones were recognized. The studied complexes represent deep-water formations, generated in oceanic island arc and trough zones. The presence of limestones, which originate from destroyed rudist reefs, is explained by transfer by means of gravitational transport mechanisms of shallow-water sediments to deep-water depositional environments. In this paper, the results of more detailed biostratigraphical and palaeo-ecological studies of foraminifera associations in Campanian-Maastrichtian complexes in Vojvodina are presented. Combined with lithological studies, seven units were determined within the complexes. The obtained results are important as a part of multidisciplinary, regional exploration of both complexes, generated in specific geological conditions, that today constitute a part of the pre-Neogene basement complex in the southeastern part of the Pannonian Basin. The Campanian- Maastrichtian carbonate-clastic complex represents sedimentary cover of the Eastern Vardar Ophiolitic Unit, while the ophiolites intercalated with hemipelagic and pelagic limestones belongs to the Sava Zone.
Influence of Cracks on the Lifetime of Semi-Rigid Pavements
Authors: Kazimierowicz-Frankowska Krystyna 
Published: April 2017

Abstract
This paper focuses on a better understanding of the process of reflective cracking propagation through the pavement structure. A series of finite element numerical simulations were conducted to investigate the initial stress and strain states in typical semi-rigid pavements with and without reflective cracks under traffic loading. It was assumed that reflective-cracks propagate from the base layer to the pavement surface. The influence of selected parameters, such as the load position, overlay thickness, and subgrade quality on stress and strain concentrations was investigated. The behaviour of the pavement structure under repeated traffic loading was analyzed in terms of ground compaction. The original theoretical model proposed by Prof. Andrzej Sawicki was used to predict the deformation of a pavement subgrade subjected to traffic loading. The damaging effect of cracks appearing in the pavement structure was investigated. It was found that even a single crack in the pavement structure may significantly reduce the pavement lifetime.
Vibrations of a Horizontal Elastic Band Plate Submerged in Fluid of Constant Depth
Authors: Szmidt Kazimierz , Hedzielski Benedykt 
Published: April 2017

Abstract
The paper deals with free and forced vibrations of a horizontal thin elastic plate submerged in an infinite layer of fluid of constant depth. In free vibrations, the pressure load on the plate results from assumed displacements of the plate. In forced vibrations, the fluid pressure is mainly induced by water waves arriving at the plate. In both cases, we have a coupled problem of hydrodynamics in which the plate and fluid motions are coupled through boundary conditions at the plate surface. At the same time, the pressure load on the plate depends on the gap between the plate and the fluid bottom. The motion of the plate is accompanied by the fluid motion. This leads to the so-called co-vibrating mass of fluid, which strongly changes the eigenfrequencies of the plate. In formulation of this problem, a linear theory of small deflections of the plate is employed. In order to calculate the fluid pressure, a solution of Laplace’s equation is constructed in the doubly connected infinite fluid domain. To this end, this infinite domain is divided into sub-domains of simple geometry, and the solution of the problem equation is constructed separately for each of these domains. Numerical experiments are conducted to illustrate the formulation developed in this paper.
An IMU-Based Wearable System for Automatic Pointing During Presentations
Authors: Sikeridis Dimitrios , Antonakopoulos Theodore A. 
Published: April 2017

Abstract
Wearable motion capture systems using Micro-Electro-Mechanical-Systems (MEMS) based Inertial Measurement Units (IMUs) are considered a promising low-cost technology that evolves rapidly over the last few years. A wearable pointing system that consists of a pair of IMUs with acceleration and angular velocity sensors is presented in this work. Each IMU is equipped with Bluetooth connectivity and both are mounted on the user’s arm. The system provides automatic pointing on the presentation screen by capturing the arm’s rotational movement and by exploiting the speaker’s relative to the screen position. In this paper, we present the system’s design and its evaluation along with a training method for estimating the user-screen distance and relative position. Experimental results show promising pointing accuracy and precision in a variety of different display sizes and distances making the system an effective solution for automatic on-screen pointing.
Vibration-based Key Exchange among Multiple Smart Devices on the Desk
Authors: Arno Alisa , Toyoda Kentaroh , Watanabe Yuji , Sasase Iwao , Mathiopoulos P. Takis 
Published: April 2017

Abstract
Eavesdropping is an important and real concern in mobile NFC (Near Filed Communication) payment and data sharing applications. Although the DH (Diffie-Hellman) scheme has been widely used in key exchange for secure communications, it may fail in indoor environments due to its vulnerability against man-in-the-middle attack. In this paper, we propose a new vibration-based key exchange among multiple smart devices which are placed on a desk. In this scheme, devices are assumed to be located next to each other with each of them vibrating with patterns converted from a key to be exchanged. The vibration patterns are measured by an accelerometer and each key is recovered from the measured acceleration. The proposed scheme has been implemented using Android smartphones and various experimental performance evaluation results have validated its effectiveness.
Autonomous Clustering Scheme for Removing the Effects of Heterogeneous Node Degrees in Ad Hoc Networks
Authors: Morita Ryosuke , Takano Chisa , Aida Masaki 
Published: April 2017

Abstract
In large scale mobile ad hoc networks (MANETs), it is effective to reduce the load of routing by introducing hierarchical routing, and it is conducted by clustering of nodes. A clustering mechanism based on the diffusion equation is a typical autonomous clustering in MANETs, and gives appropriate clustering if all the node degrees are uniform. However, node degrees in MANETs are heterogeneous in general, the fact causes the difference in the strength of diffusion effect. This difference causes that the position of cluster head tends to be around the boundary of networks and degrade battery efficiency of nodes. In this paper, by introducing an asymmetric diffusion depending on node degree, we propose a new clustering method independent of heterogeneity of node degrees. We show that the proposed method has efficient characteristics for battery consumption. In addition, we show the comparison of the proposed method with the conventional method with respect to the efficiency of routing.
Object Classification Using Support Vector Machines with Kernel-based Data Preprocessing
Authors: Adamiak Krzysztof , Duch Piotr , Ślot Krzysztof 
Published: April 2017

Abstract
The paper explores possibility of improving Support Vector Machine-based classification performance by introducing an input data dimensionality reduction step. Feature extraction by means of two different kernel methods are considered: kernel Principal Component Analysis (kPCA) and Supervised kernel Principal Component Analysis. It is hypothesized that input domain transformation, aimed at emphasizing between-class differences, would facilitate classification problem. Experiments, performed on three different datasets show that one can benefit from the proposed approach, as it provides lower variability in classification performance at similar, high recognition rates.
Optimization of Distributed Multi-Node, Multi-GPU, Heterogeneous System for 3D Image Reconstruction in Electrical Capacitance Tomography
Authors: Majchrowicz Michał , Kapusta Paweł , Jackowska-Strumiłło Lidia , Sankowski Dominik 
Published: April 2017

Abstract
Electrical Capacitance Tomography is a non-invasive imaging technique, which allows visualization of the industrial processes interior and can be applied to many branches of the industry. Image reconstruction process, especially in case of 3D images, is a very time consuming task (when using classic processors and algorithms), which in turn leads to an unacceptable waiting time and currently limits the use of 3D Electrical Capacitance Tomography. Reconstruction using deterministic methods requires execution of many basic operations of linear algebra, such as matrix transposition, multiplication, addition and subtraction. In order to reach real-time reconstruction a 3D ECT computational subsystem must be able to transform capacitance data into images in a fraction of a second. By assuming, that many of the computations can be performed in parallel using modern, fast graphics processor and by altering the algorithms, time to achieve high quality image reconstruction will be shortened significantly. The research conducted while analysing ECT algorithms has also shown that, although dynamic development of GPU computational capabilities and its recent application for image reconstruction in ECT has significantly improved calculations time, in modern systems a single GPU is not enough to perform many tasks. Distributed Multi-GPU solutions can reduce reconstruction time to only a fraction of what was possible on pure CPU systems. Nevertheless performed tests clearly illustrate the need for further optimizations of previously developed algorithms.
Case Report. Appendiceal Recurrent Colic Due to Enterobius Vermicularis Infection in a 14-Year-Old Female Patient
Authors: Stoyanov Toni I. , Corral-Fernadez Emilio , Melero-Abellan Antonio , Sarduy-Fernandez Pablo , Casado-Santamaria Paloma , Garcia-Grimaldo Elias , Corellano Julio Valer , Ivanov Kaloyan T. , Kolev Nikolay H. , Tonchev Pencho T. 
Published: April 2017

Summary
Acute appendicitis due to Enterobius vermicularis, usually known as pinworm, is very rare and affects mostly children.According to different authors, it is controversial whether pinworms cause inflammation of the appendix or appendiceal colic only.We presentacase ofa14-year-old female with three subsequent hospitalizations in 1 month due to abdominal pain in the right lower abdomen, with rebound tenderness, normal CTscan and laboratory findings. During the last hospitalization, laparoscopic appendectomy was performed. Intraoperatively multiple pinworms were found in the appendix. These were trapped byastercolith in the appendicular base inanoninflamed and histologically normal appendix. Two oral doses of mebendazole were administered postoperatively. Uneventful postoperative period and postoperative follow-up showed lack of symptoms six months after the operation. Despite the widespread idea that acute appendicitis due to Enterobius vermicularis is very rare, it should always be considered in young female patients with repeated abdominal pain in the right lower abdomen with normal laboratory and radiologic findings.
A Dowry, Will, and Blended Family of Calvin’s Geneva Put Anne Colladon, to the Test
Authors: Olson Jeannine 
Published: April 2017

Abstract
Anne Colladon, widow of Laurent de Normandie, financier of the mid-sixteenth century Genevan book trade, grappled with Laurent’s first wife’s estate and her adult stepsons’ claims on her estate. This case study of a famous family of French origin reveals complexities of early-modern systems of dowries and wills and problems for a second wife and her daughter. Normandie was a great hero of the Reformation because of his financing of Calvin’s publications and his dispatching of colporteurs carrying Bibles, catechisms, and Psalters into France. Anne was from a prominent family that fled France for Geneva (1550). She was an astute business woman and seemingly responsible mother but she inherited a complex situation after Normandie’s untimely death of the plague in 1569. She was left with financial problems and two stepsons in a blended family that included three children she had conceived with Laurent. It was not an easy mix.