bluuebunny/crossref_metadata_2025 huggingface dataset:
Corrosive effects of nitrate-containing phase change materials used with copper
Authors: Danielik Vladimír , Šoška Peter , Felgerová Katarína
Published: December 2016

The paper presents the results of a study on the corrosion behaviour of copper (EN CW004A) in five possible phase change materials (PCMs): magnesium nitrate hexahydrate pure and with an addition of Mg(OH)2 (0.5 wt. %) or Sr(OH)2 (0.5 wt. %) at 90 °C, calcium nitrate tetrahydrate at 50 °C and a mixture of magnesium nitrate hexahydrate and calcium nitrate tetrahydrate (1:1 mass ratio) at 72 °C. The corrosion rate of copper samples is low except for the use of Mg(NO3)2 · 6H2O with/without an addition of Mg(OH)2. The lowest corrosion rate was observed for the mixture Mg(NO3)2 · 6H2O—Ca(NO3)2 · 4H2O (1:1), and it was ca six times lower than that of pure magnesium nitrate hexahydrate.
Effects of white grape preparation on sensory quality of cookies
Authors: Kuchtová Veronika , Karovičová Jolana , Kohajdová Zlatica , Minarovičová Lucia , Kimličková Veronika
Published: December 2016

Grape skin pomace is rich in proteins, ash, lipids, carbohydrates, vitamins, and compounds with important biological properties such as phenolic compounds. Because of its complex composition, grape skin pomace can be used for nutritional enrichment of various cereals products. The aim of study was to investigate the effects of grape skin pomace on the sensory properties of cookies. Results indicated that grape skin pomace can be incorporated in cookies as a partial replacement up to 15 % of composite flour without negatively affecting the sensory quality of cookies.
Potential of bran from various wheat variety for cookies production
Authors: Lauková Michaela , Karovičová Jolana , Kohajdová Zlatica , Babulicová Mária , Rückschloss Ľubomír , Lopatková Veronika
Published: December 2016

The effect of replacing wheat flour with different kinds of wheat bran and spelt bran at level 5, 10 and 15 % on dough rheology, qualitative parameters of cookies as well as on sensory properties was studied. Addition of bran increased water absorption and mixing tolerance index, prolonged dough development time and decreased dough stability. It was also observed that incorporation of wheat bran modified qualitative parameters of cookies (volume, specific volume, spread ratio and porosity decreased). From the sensory evaluation resulted that higher amounts of wheat bran negatively affected taste, hardness and overall acceptability of cookies. Addition of bran up to 5 % resulted in cookies with high overall acceptability.
Disruption of GABA shunt affects Trichoderma atroviride response to nutritional and environmental stimuli
Authors: Nižnanský Ľuboš , Varečka Ľudovít , Kryštofová Svetlana
Published: December 2016

The fungus Trichoderma atroviride is a member of the genus Trichoderma to which belong many species known for high cellulase production, formation of various antibiotics, plant biocontrol and antagonistic activities against other fungi. Deletion of T. atroviride glutamate decarboxylase gene gad caused minor defects in germination, hyphal branching, slower growth and disruption of conidiation pattern. GABA can be used by fungi as a secondary carbon source and as a primary nitrogen source. We analyzed the effect of different nutrient compositions and environmental conditions (light and temperature) on growth and development of T. atroviride in strains defective in the functional GAD. The gad mutants grown on NH4NO3 as a sole carbon source grew slower and formed conidiation bands closer to each other which was clearly demonstrated during their cultivation in race tubes. The gad mutants exhibited slightly lower apical extension growth rate at the room temperature but their apical extension rate dropped significantly at 30 °C. Higher temperature had also inhibitory effect on gad mutant conidiation, whereas 30 °C seems optimal temperature for the parental strain. The optimal temperature for gad mutant conidiation was lower than in F534, about 25 °C.
Crystal structures of [M(N3)2(phen)2] compounds, M = Mn, Co or Cu and phen = 1,10-phenanthroline
Authors: Masárová Petra , Moncol Jan
Published: December 2016

Crystal structures of the title compounds, [Mn(N3)2(phen)2] (1), [Co(N3)2(phen)2] (2) and [Cu(N3)2(phen)2] · 1.5 H2O (3), have been determined at 100 K. Central atoms of the above-mentioned compounds are coordinated by four pyridine nitrogen donor atoms from two 1,10-phenanthroline molecules and two nitrogen donor atoms of terminally coordinated azide anions, which resulted in a distorted {MN6} octahedral geometry. The π-π stacking interactions, as well as weak C—H∙∙∙N hydrogen bonds, were observed in all three compounds. Moreover, complex 3 revealed also supramolecular chains of the complex and water molecules linked together through O—H∙∙∙N hydrogen bonds.
Estimation of thermal effects on receptor from pool fires
Authors: Labovská Zuzana , Labovský Juraj
Published: December 2016

The aim of this contribution is to provide an overview of the calculation procedures of risk analysis, that is, the effects and consequences of pool fires. Fires and explosions are the most significant and most common causes of damage to equipment and of injuries and death in industry. Damages are a direct consequence of the generated heat flux. Mathematical tools for the prediction of heat flux at a distance can be divided into four classes: semi-empirical models, field models, integral models and zone models. Semi-empirical modeling is a relatively simple technique providing models predicting heat flux at a distance. There are two types of semi-empirical models: point source models and surface emitter models. By their nature, semi-empirical models depend strongly on experimental data. Correlations are able to describe the general features of a fire. Semi-empirical models are ideal for routine hazard assessment purposes because they are mathematically simple, and hence easily understood. However, if more models describing the same phenomenon are available, significant differences in the heat flux prediction can be expected. In this contribution, differences in the prediction of the heat flux from pool fires are discussed.
Robust controller design for a heat exchanger using ℋ2, ℋ∞, ℋ2/ℋ∞, and μ-synthesis approaches
Authors: Vasičkaninová Anna , Bakošová Monika
Published: December 2016

Possibilities of using robust controllers for a shell-and-tube heat exchanger control were studied, tested and compared by simulations and obtained results are presented in this paper. The heat exchanger was used to pre-heat petroleum by hot water; the controlled output was the measured output temperature of the heated fluid — petroleum, and the control input was the volumetric flow rate of the heating fluid — water. Robust controllers were designed using ℋ2, ℋ∞, ℋ2/ℋ∞ strategies and μ-synthesis. A comparison with the classical PID control demonstrated the superiority of the proposed robust control especially in case when the controlled process is affected by disturbances.
Cross-talk between leptin, ghrelin and orexins in the central nervous system of seasonal animals – a review
Authors: Kirsz Katarzyna , Szczęsna Małgorzata , Borsuk Anna , Zięba Dorota A.
Published: December 2016

The maintenance of energy homeostasis is achieved with ‘detectors’ that receive signals from the external and internal environment and with multidirectional ‘communication routes’ including neuronal networks and body fluids, such as blood and cerebrospinal fluid. Changes in the energy demands of organisms are caused by current physiological status and environmental conditions, including season and food availability. Little is known about the interactions between the metabolic indicators involved in the maintenance of energy homeostasis, e.g., leptin, orexins and ghrelin. Sheep and other seasonal animals are highly adaptable to their environments because of the plasticity of their neural and endocrine systems. Sheep exhibit leptin resistance and are thus an extremely interesting model for research on the relationship between hormonal indicators of energy metabolism. The paper is focused mainly on the anatomical and functional communication between leptin, ghrelin and orexins, which play principal roles in the adaptation of energetic demands to environmental fluctuations.
Effect of the age of ganders on reproductive behavior and fertility in a competitive mating structure
Authors: Gumułka Małgorzata , Rozenboim Israel
Published: December 2016

This paper presents the study on determination of gander-goose mating activity in relation to age and the position of gander in social hierarchic rank. Moreover, levels of fertility (F) and testosterone (T) in different gander age groups were analyzed. The study was carried out on one-year-old geese (N = 64) and one- or two-year-old ganders (N = 16; 1♂: 4♀). Observations of mating activity (MA) were conducted during the 3-h period of the daylight (10 h), 2-3 times per week (102 h/ group/34 days). The recording was done with a digital recorder connected to cameras. Agonistic behavioral interactions between ganders were noted to determine a social hierarchic rank. The MA was described by frequency of courtship displays, copulation attempts, successful copulation (SCop), and interaction disrupted (DMI) with agonistic behavior. Fertility was evaluated after the artificial incubation (1×/week) in a commercial hatchery. The frequency of SCop, DMI, and T concentration were higher (P<0.05) for two- than one-year-old ganders. Moreover, F was higher by 11.2% for group of geese kept with two-year-old ganders. There was an effect of the gander’s rank in social hierarchy on the frequency of MA. For dominant ganders, frequency of courtship displays (1.0/times/3 h) and copulation attempts (0.8/times/3 h) were lower (P<0.05), but SCop (1.5/times/3 h) was higher (P<0.05) than for subordinate ones. Thus, in domestic goose flocks reproductive success was associated with age of ganders used in competitive mating system. This is probably a multifactor effect of interaction between sexual/social experience, T-dependent mating motivation, and efficiency of MA. It is recommended to keep one-year-old geese with older ganders (after sexual reactivation) for optimal fertility results with sex ratio adjusted to gander-gander antagonistic interaction dynamic.
The effect of corn or beet pulp silage supplemented diet on production parameters, oxidative stability of muscles and fatty acid composition of abdominal fat in geese
Authors: Karwowska Małgorzata , Grabowicz Małgorzata , Stadnik Joanna , Szterk Piotr , Bernacki Zenon , Dolatowski Zbigniew J.
Published: December 2016

The aim of this study was to assess the production parameters of White Koluda® geese fed with a corn or beet pulp silage supplemented diet. The oxidative stability of breast and thigh muscles during frozen storage and the fatty acid composition of abdominal fat were also investigated. Measurements were carried out on a total of 42 geese of the White Koluda® W31 strain that were divided into three experimental groups: group I (control) - basal diet, group II - basal diet with corn silage addition, group III - basal diet with pressed beet pulp silage addition. Diets containing ad libitum maize silage or sugar beet pulp silage supplemented with a limited amount of commercial diets, significantly reduced BW (about 9%) and ADG (about 27%) of birds compared to the control group in the 14th week of rearing. Feeding corn or sugar beet pulp silage to geese did not affect pH values, heme iron content, colour parameters but decreased lipid oxidation values in muscles 3 days after slaughter. The abdominal fat of geese fed with the pressed beet pulp silage supplemented diet was characterized by a significantly higher content of myristic and linoleic acid and a lower content of oleic acid. In conclusion, feeding geese with limited amount of commercial mixtures supplemented with maize or sugar beet pulp silages may be recommended primarily for increasing financial efficiency in White Koluda® geese farms but also for improving the quality of goose carcasses, due to their low fat and high quality of meat.
Improving disease prevention and treatment in controlled fish culture
Authors: Terech-Majewska Elżbieta
Published: December 2016

The aim of the work was to evaluate long-term results of studies focusing on improving methods for preventing and treating fish diseases using selected natural and syntetic immunomodulators and vaccines in fish culture. Simultaneously, attention is drawn to infectious or environmental threats against which appropriately composed immunoprophylaxis can be used in production cycles. Fish culture is intensifying in Poland and globally, which means that the role of prevention and well-designed prophylaxis is of increasing significance to the prevention and treatment of fish diseases. Currently, 33 fish species are cultured in Poland as stocking material or for production. The primary methods for preventing diseases in controlled fish culture are ensuring the welfare of fish and other prophylactic methods, including immunoprophylaxis. Many infectious and non-infectious threats that can cause direct losses and limit fish culture are present in the aquatic environment. Fish diseases generally stem from the simultaneous action of many factors that coincide and are difficult to distinguish. Pesticides (organochlorine insecticides, organophosphorus herbicides), aromatic hydrocarbons, pentachlorophenol, heavy metals, and chemotherapeutics are particularly toxic to fish. Biodegradation, which is continual in aquatic environments, is a process by which toxic and other substances that negatively affect fish become bioavailable and impact the immune system, the functioning of which is a specific bioindicator of environmental quality. Innate immunity plays a key role in the defense against disadvantageous factors, which also include pathogens. Immunomodulation methods can protect resistance mechanisms, thereby increasing disease prevention and treatment in controlled fish culture.
A comparison between the continual reassessment method and D-optimum design for dose finding in phase I clinical trials
Authors: Alam M. Iftakhar
Published: December 2016

The continual reassessment method is a model-based procedure, described in the literature, used to determine the maximum tolerated dose in phase I clinical trials. The maximum tolerated dose can also be found under the framework of D-optimum design, where information is gathered in such a way so that asymptotic variability in the parameter estimates in minimised. This paper investigates the two methods under some realistic settings to explore any potential differences between them. Simulation studies for six plausible dose-response scenarios show that D-optimum design can work well in comparison with the continual reassessment method in many cases. The D-optimum design is also found to allocate doses from the extremes of the design region to the patients in a trial.
A note on the D-optimality and D-efficiency of nonorthogonal blocked main effects plans
Authors: Smaga Łukasz
Published: December 2016

This paper considers main effects plans used to study m two-level factors using n runs which are partitioned into b blocks of equal size k = n/b. The assumptions are adopted that n ≡ 2 (mod 8) and k > 2 is even. Certain designs not having all main effects orthogonal to blocks were shown by Jacroux (2011a) to be D-optimal when (m − 2)(k − 2) + 2 ⩽ n ⩽ (m − 1)(k − 2) + 2. Here, we extend that result. For (m − 3)(k − 2) + 2 ⩽ n < (m − 2)(k − 2) + 2, the D-optimality of those designs is proved. Moreover, their D-efficiency is shown to be close to one for 2(m + 1) ⩽ n < (m − 3)(k − 2) + 2, indicating their good performance under the criterion of D-optimality.
Correlation of Residual Diuresis with MIS Score and Nutritional Status in Peritoneal Dialysis Patients: A Croatian Nationwide Study
Authors: Basic-Jukic Nikolina , Vujicic Bozidar , Radic Josipa , Klaric Dragan , Grdan Zeljka , Radulovic Goran , Juric Klara , Altabas Karmela , Jakic Marko , Coric-Martinovic Valentina , Kovacevic-Vojtusek Ivana , Gulin Marijana , Jankovic Nikola , Ljutic Dragan , Racki Sanjin
Published: December 2016

Introduction.Residual diuresis (RD) is an important predictor of mortality and cardiovascular (CV) deaths in peritoneal dialysis (PD) patients, and contributes more to overall survival compared to PD clearance. In this study we investigated the correlation between RD and CV outcomes in PD patients.

Methods.A total of 190 PD patients from 13 dialysis centers, a national representation, were included in this analysis. Biomarkers of anemia, nutritional status [malnutrition inflammation score (MIS), subjective global assessment (SGA), serum albumin, anthropometric measurements including body mass index (BMI)], dialysis dose (Kt/V) and laboratory measurements were determined. RD was estimated using the volume of daily urine.

Results.There were 78(41.05 %) females and 112 (58.95 %) males; aged 57.35±14.41 years, on PD for 24.96±24.43 months. Fifty-six patients had diabetes type II (44 as primary kidney disease). The mean RD was 1170±673.6 ml (range 0-3000 mL). Statistically significant correlations between RD and BMI, hip circumference, time on PD, Kt/V, MIS, SGA, erythrocytes (E), Hemoglobin (Hb), PTH, and serum albumin were observed.

Conclusions.We demonstrated a significant correlation between RD and MIS score, SGA, anthropometry and albumin. Every effort should be invested to maintain RD for as long as possible to achieve optimal treatment results and to decrease CV mortality in PD population.
Is there any Gender Difference in the Association between Obesity, Chronic Kidney Disease and Anemia
Authors: Atanassova Krasimira , Masin-Spasovska Jelka , Spasovski Goce , Paskalev Emil
Published: December 2016

Introduction. Nowadays, obesity has emerged as one of the most independent risk factors for chronic kidney disease (CKD) in both economically developed and undeveloped countries. The number of patients requiring dialysis as a consequence of obesity-related renal diseases, such as diabetes mellitus and hypertension, is increasing worldwide. Moreover, obesity has been shown to favorize the risk of cardiovascular diseases (CVD) with premature death due to CKD and/or end-stage renal disease (ESRD). The aim of the study was to investigate the association between obesity [e.g. body mass index (BMI)], kidney function [e.g. glomerular filtration rate (GFR)] and renal anemia in CKD patients.

Methods. Retrospectively, data from the register of 315 pre-dialysis patients with different stages of CKD not on erythropoiesis stimulation agents (ESAs) during the period between 1 Jan 2013-30 June 2013 were used to assess the association between the degree of CKD impairment with the degree of obesity and anemia. The stage and/or progression of CKD was calculated by GFR, while the degree of obesity by the body mass index (BMI). CKD was defined as a glomerular filtration rate (GFR) <60 mL/min per 1.73 m2. Data analysis was performed by means of the simple Microsoft excel program.

Results. Within the study population of 315 CKD patients, 123 were males with mean age of 63.4±1.33 years and 192 females of 57.3±1.2 years. The GFR reduced with the increased BMI in both genders, and majority of patients (n=243) were in CKD stage 3, with a mean GFR of 44.5 ml/min/1.73 m2. The BMI values in female patients with first and second degree of obesity negatively correlated with GFR (r=−0.46, p<0.05). Only female patients with second degree of obesity (BMI of 35-39.9 kg/m2) had a positive correlation between the decreased renal function and reduced Hb levels.

Conclusions. Our study provided an unconditional evidence not only for the presence of an association between the degree of obesity (BMI) and the degree of renal function impairment (GFR), but also an association between the higher BMI and the higher degree of kidney anemia seen in women with second degree of obesity. Further larger scale trials and interventional studies are required to see the effect of body weight reduction on renal function and especially anemia.
Left Ventricular Cleft Detected by Transthoracic Echocardiography in a Patient with Autosomal Dominant Polycystic Kidney Disease
Authors: Gok Gulay , Ilhan Ibrahım , Beydili Ibrahim , Guvenc Tolga Sinan , Kaya Adnan , Magden Kemal
Published: December 2016

Recently, the presence of left ventricular clefts has been identified frequently with the advancement of cardiac imaging modalities such as cardiac magnetic resonance imaging and computed tomography. Here we report a rare case of left ventricular cleft that was incidentally diagnosed with the ECG changes that imitated the presence of LMCA stenosis and diagnosed by transthoracic echocardiography in a patient with autosomal dominant polycytic kidney disease.
A Rare Case of Peritonitis: Streptococcus Salivarius
Authors: Cebeci Egemen , Samanci Nilay Sengul , Gursu Meltem , Ozturk Savas , Pehlivanoglu Filiz , Sumnu Abdullah , Karadag Serhat , Kazancioglu Rumeyza
Published: December 2016

Streptococcus salivarius is a Gram-positive bacteria that may cause infections like endocarditis and meningitis. However, it has not been reported as a causative agent of peritonitis in peritoneal dialysis patients. In this paper we present a rare case of peritonitis with Streptococcus salivarius admitted to our Clinic with abdominal pain, who had been on peritoneal dialysis treatment for 19 months. Streptococus salivarius was cultured from the effluent, sensitive to ampicillin and penicillin G. Patient was discharged completely cured. Peritonitis is the most important clinical issue that occurs in patients treated with peritoneal dialysis, and every effort should be invested to determine the causative agent while even rare bacteria as Streptococcus salivarius may be found.
Alternative renin-angiotensin system pathways in adipose tissue and their role in the pathogenesis of obesity
Authors: Slamkova M , Zorad S , Krskova K
Published: December 2016

Adipose tissue expresses all the renin-angiotensin system (RAS) components that play an important role in the adipogenesis, lipid and glucose metabolism regulation in an auto/paracrine manner. The classical RAS has been found to be over-activated during the adipose tissue enlargement, thus elevated generation of angiotensin II (Ang II) may contribute to the obesity pathogenesis. The contemporary view on the RAS has become more complex with the discovery of alternative pathways, including angiotensin-converting enzyme 2 (ACE2)/angiotensin (Ang)-(1-7)/Mas receptor, (pro)renin receptor, as well as angiotensin IV(Ang IV)/AT4 receptor. Ang-(1-7)viaMas receptor counteracts with most of the deleterious effects of the Ang II-mediated by AT1 receptor implying its beneficial role in the glucose and lipid metabolism, oxidative stress, inflammation, and insulin resistance. Pro(renin) receptor may play a role (at least partial) in the pathogenesis of the obesity by increasing the local production of Ang II in adipose tissue as well as triggering signal transduction independently of Ang II. In this review, modulation of alternative RAS pathways in adipose tissue during obesity is discussed and the involvement of Ang-(1-7), (pro)renin and AT4 receptors in the regulation of adipose tissue homeostasis and insulin resistance is summarized.
Enforceable Title as a Basis for Enforcement of Tax Liabilities
Authors: Dalkowska Anna
Published: December 2016

Effective enforcement of tax liabilities guarantees proper functioning of the state. The key role is played by the administrative enforceable title [Polish: tytuł wykonawczy], issued by the creditor, which constitutes the basis for initiation and implementation of enforcement proceedings. It is an official document constituting evidence of a taxpayer’s failure to meet an obligation in a timely manner, giving an enforcement authority the right to use coercive measures on that taxpayer. The aim of the article is to present the enforceable title, as a necessary basis for the administrative enforcement of tax claims to condition its compliance with the law regulations and attempt to answer the question: does the legal enforceable title in current law regulations guarantees the creditor realization of the public interest and the taxpayer the right to legal procedures for enforcement? Primarily, legal and comparative method based on the condition and operation of the law in force is used in the article.
Selected Problems of the Phenomenon of Minimizing Tax Burdens
Authors: Drywa Anna
Published: December 2016

The aim of this article is to reflect upon the selected problems of the phenomenon of minimizing the tax burdens. It analyses the nature of the phenomenon, its causes and consequences.

Taxpayers increasingly more often undertake actions aimed at minimizing or even eliminating tax burdens. At the same time, it is expected that as a result of the dissemination of knowledge about the techniques of minimizing the tax burdens, the availability of professional advisory in this aspect, the phenomenon will become even more common than it is now. It bears serious consequences in the form of subsequent lowering of public income. It is therefore necessary to pay attention to this problem and to take thoughtful actions in order to limit this phenomenon.
Spatial considerations of an area restriction model for identifying harvest blocks at commercial forest plantations
Authors: Kašpar Jan , Perez Gerardo F. E. , Cerveira Adelaide , Marušák Róbert
Published: December 2016

In the past few decades, ecological and environmental issues have dominated the forest industry worldwide, but economic aspects have been much less studied in this dynamic period. However, a sustainable and efficient forest biomass supply is critical for socio-economic development in many regions, particularly in rural areas. Nature protection efforts have contributed to reduced harvesting quotas, which have resulted in an imbalance of the environmental functions of the forests and forest management, particularly wood supply.

Considering the size and distribution of forest production management units and the forest stands that compose those units, there is a clear need for improved decision-making tools that help forest managers in planning harvest sequences. The optimization of harvest scheduling should consider economic and spatial factors, which may reduce production costs by increasing the logistic efficiency. Moreover, incorporating maximum harvesting opening size constraints into planning can help preserve biodiversity.

This article presents a new spatial harvest scheduling model based on the integer programming method; it was developed using real data from a forest production unit located in the northern part of the southeast region of Brazil. The goal of the proposed scheduling approach is to maximize the net present value and concentrate the harvesting locations in each period. In spite of the fact that the object of the study is plantation forest under management different to common conditions in Europe or North America, the model is flexible and can be used in management of forest in Central Europe.
Effect of different tree mortality patterns on stand development in the forest model SIBYLA
Authors: Trombik Jiří , Barka Ivan , Hlásny Tomáš
Published: December 2016

Forest mortality critically affects stand structure and the quality of ecosystem services provided by forests. Spruce bark beetle (Ips typographus) generates rather complex infestation and mortality patterns, and implementation of such patterns in forest models is challenging. We present here the procedure, which allows to simulate the bark beetle-related tree mortality in the forest dynamics model Sibyla. We explored how sensitive various production and stand structure indicators are to tree mortality patterns, which can be generated by bark beetles. We compared the simulation outputs for three unmanaged forest stands with 40, 70 and 100% proportion of spruce as affected by the disturbance-related mortality that occurred in a random pattern and in a patchy pattern. The used tree species and age class-specific mortality rates were derived from the disturbance-related mortality records from Slovakia. The proposed algorithm was developed in the SQLite using the Python language, and the algorithm allowed us to define the degree of spatial clustering of dead trees ranging from a random distribution to a completely clustered distribution; a number of trees that died in either mode is set to remain equal. We found significant differences between the long-term developments of the three investigated forest stands, but we found very little effect of the tested mortality modes on stand increment, tree species composition and diversity, and tree size diversity. Hence, our hypothesis that the different pattern of dead trees emergence should affect the competitive interactions between trees and regeneration, and thus affect selected productivity and stand structure indicators was not confirmed.
On Multiset Ordering
Authors: Bancerek Grzegorz
Published: December 2016

Formalization of a part of [11]. Unfortunately, not all is possible to be formalized. Namely, in the paper there is a mistake in the proof of Lemma 3. It states that there exists x ∈ M
1 such that M
1(x) > N
1(x) and (∀y ∈ N
1)x ⊀ y. It should be M
1(x) ⩾ N
1(x). Nevertheless we do not know whether x ∈ N
1 or not and cannot prove the contradiction. In the article we referred to [8], [9] and [10].
Can we identify the heart rate deflection point and rating of perceived exertion threshold during the Yo-Yo Intermittent Recovery Test level 1 in university basketball players? A pilot study
Authors: Conde Juan Henrique Szymczak , Souza Gislaine Cristina de , Costa Poliana de Lima , Novack Luiz Fernando , Osiecki Raul
Published: December 2016

Purpose

The aim of the study was to identify the heart rate deflection point (HRDP) and the rating of perceived exertion (RPE) threshold (DmaxRPE) during the Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1) in university basketball players.

Methods

Eleven male university basketball athletes performed two incremental tests, interspersed by seven days, in a random crossover pattern: (1) the treadmill test with the initial velocity of 6 km • h–1, increments of 1 km • h–1 each 2 minutes, and pauses of 15 seconds between the stages; (2) the Yo-Yo IR1.

Results

During the Yo-Yo IR1, the HRDP and the DmaxRPE were identified only in six and
seven subjects, respectively. In the treadmill test, the HRDP and the DmaxRPE were found in 11 and 10 individuals, respectively. Additionally, there were no differences between the velocity of occurrence of the HRDP and the DmaxRPE recognized in the treadmill
test and in the Yo-Yo IR1 (p > 0.05).

Conclusions

The results suggest that if the goal is to determine aerobic capacity by the HRDP and the DmaxRPE, Yo-Yo IR1 should not be used. Instead, the treadmill test is a reliable tool.
High and low impact aerobic exercise as a method of early prevention of hypercholesterolaemia development among young women
Authors: Nowak Robert , Kostrzewa-Nowak Dorota , Jastrzębski Zbigniew , Zarębska Aleksandra , Ficek Krzysztof , Cięszczyk Paweł
Published: December 2016

Purpose

Hypercholesterolaemia is a highly prevalent condition that has major health- and cost-related implications for the society. Aerobic-type exercise improves lipoprotein-lipid profiles, cardiorespiratory fitness and body composition in healthy young women. Thus, the aim of the study was to assess the impact of 9 weeks of low-high aerobic-type exercise on the lipid profile among young women.

Methods

On the basis of the lipid profile, 64 women (median age, 21.8 years; range, 19.0–24.7 years) were divided into two groups: with low (LRH) and intermediate (IRH) risk of developing hypercholesterolaemia. The participants completed a 9-week-long low-high aerobic exercise programme. Before and after the training programme, we determined the lipid profile: triglycerides (TG), total cholesterol (TC), lipoprotein cholesterol: HDL-C and LDL-C, and glucose levels. Selected cardiorespiratory fitness variables and body composition were also determined.

Results

It was found that aerobic-type fitness exercise in the IRH group caused statistically significant decreases in TC and TG levels in comparison with baseline values. Significant increase in maximum oxygen uptake and decrease in HDL-C in the LRH group were also observed.

Conclusions

Aerobic fitness exercises, a combination of two alternating styles, could influence the blood lipid profile by decreasing plasma TC and TG levels. In non-athlete women, physical activity may be a good tool to prevent cardiovascular diseases.
Unsteady Hartmann Two-Phase Flow: The Riemann-Sum Approximation Approach
Authors: Jha B.K. , Babila C.T. , Isa S.
Published: December 2016

We consider the time dependent Hartmann flow of a conducting fluid in a channel formed by two horizontal parallel plates of infinite extent, there being a layer of a non-conducting fluid between the conducting fluid and the upper channel wall. The flow formation of conducting and non-conducting fluids is coupled by equating the velocity and shear stress at the interface. The unsteady flow formation inside the channel is caused by a sudden change in the pressure gradient. The relevant partial differential equations capturing the present physical situation are transformed into ordinary differential equations using the Laplace transform technique. The ordinary differential equations are then solved analytically and the Riemann-sum approximation method is used to invert the Laplace domain into time domain. The solution obtained is validated by comparisons with the closed form solutions obtained for steady states which have been derived separately and also by the implicit finite difference method. The variation of velocity, mass flow rate and skin-friction on both plates for various physical parameters involved in the problem are reported and discussed with the help of line graphs. It was found that the effect of changes of the electric load parameter is to aid or oppose the flow as compared to the short-circuited case.
On Diffusion of Chemically Reactive Species in a Convective Flow Past an Inclined Plate with Variable Surface Temperature and Variable Mass Diffusion
Authors: Kirubavathi J.D. , Palani G.
Published: December 2016

A numerical solution of a transient natural convection flow past a semi-infinite inclined plate under the combined buoyancy effects of heat and mass transfer along with chemical reaction is presented herewith. The governing boundary layer equations for the above flow problem for a first order homogeneous chemical reaction are set up and non-dimensionalised. An implicit finite difference method is employed to solve the unsteady, nonlinear, integro and coupled partial differential equation. Numerical results are presented for various parameters occurring in the problem. The unsteady velocity, temperature and concentration profiles, local and average skin friction, Nusselt number and Sherwood number are studied for both a generative and destructive reaction.
A Conceptual Project of a Device for Human Wrist Functional Rehabilitation
Authors: Lewandowski B. , Olinski M. , Wudarczyk S. , Gronowicz A.
Published: December 2016

In the paper, the problems of devices supporting functional rehabilitation of a human wrist were addressed. A literature review and a description of selected devices together with an indication of their advantages and disadvantages were conducted. The biomechanical structure of a human wrist was analyzed. On this basis and after taking into consideration ranges of motion of the selected joints the concept of a new mechanism was developed. A 3D model of the device was built in the Autodesk Inventor system. For the purpose of simulations another model was developed in the MSC Adams system. Issues of drives and sensors selection, as well as requirements for the control system, were examined.
Guided Circumferential Waves in Layered Poroelastic Cylinders
Authors: Shah S.A. , Apsar G.
Published: December 2016

The present paper investigates the propagation of time harmonic circumferential waves in a two-dimensional hollow poroelastic cylinder with an inner shaft (shaft-bearing assembly). The hollow poroelastic cylinder and inner shaft are assumed to be infinite in axial direction. The outer surface of the cylinder is stress free and at the interface, between the inner shaft and the outer cylinder, it is assumed to be free sliding and the interfacial shear stresses are zero, also the normal stress and radial displacements are continuous. The frequency equation of guided circumferential waves for a permeable and an impermeable surface is obtained. When the angular wave number vanish the frequency equation of guided circumferential waves for a permeable and an impermeable surface degenerates and the dilatational and shear waves are uncoupled. Shear waves are independent of the nature of surface. The frequency equation of a permeable and an impermeable surface for bore-piston assembly is obtained as a particular case of the model under consideration when the outer radius of the hollow poroelastic cylinder tends to infinity. Results of previous studies are obtained as a particular case of the present study. Nondimensional frequency as a function of wave number is presented graphically for two types of models and discussed. Numerical results show that, in general, the first modes are linear for permeable and impermeable surfaces and the frequency of a permeable surface is more than that of an impermeable surface.
Pressure Distribution in a Porous Squeeze Film Bearing Lubricated with a Herschel-Bulkley Fluid
Authors: Walicka A. , Jurczak P.
Published: December 2016

The influence of a wall porosity on the pressure distribution in a curvilinear squeeze film bearing lubricated with a lubricant being a viscoplastic fluid of a Herschel-Bulkley type is considered. After general considerations on the flow of the viscoplastic fluid (lubricant) in a bearing clearance and in a porous layer the modified Reynolds equation for the curvilinear squeeze film bearing with a Herschel-Bulkley lubricant is given. The solution of this equation is obtained by a method of successive approximation. As a result one obtains a formula expressing the pressure distribution. The example of squeeze films in a step bearing (modeled by two parallel disks) is discussed in detail.
Mechanism of a Motion Platform Inducing the Movement of the Operator’s Seat in a Heavy Machine
Authors: Tora G. , Trzaska W.
Published: December 2016

One of the major work safety issues involves the investigations of machine vibrations and the way they affect the machine operators. These investigations can be performed in the laboratory conditions in a setup in which the seat vibrations are induced by a motion platform. A complex mechanism is proposed implementing 3 translations and 2 rotation movements, and actuated by three electric motors. This study investigates the design structure of the real motion platform mechanism and provides the synthesis of link dimensioning. Kinematic dependencies are formulated and the Jacobian matrix is derived accordingly to solve the equations of motion. Computer simulation procedure yields the critical seat vibration frequency and amplitudes for the available asynchronous motors.
The Effects of Personal and Organizational Resources on Work and Well-Being Outcomes among Turkish Nurses
Authors: Burke Ronald J. , Koyuncu Mustafa , Fiksenbaum Lisa , Yirik Sevket , Koynncu Kadife
Published: December 2016

This exploratory research examined the relationship of a personal and an organizational resource, optimism and levels of hospital support respectively, on a variety of work and well-being outcomes in a sample of nurses in Turkey. Data were collected from 212 nurses using anonymously completed questionnaires. Feelings of psychological empowerment was positioned as a mediator between resources and work and well-being outcomes which included job satisfaction, work engagement, affective hospital commitment, work-family conflict, family-work conflict, and intent to quit. The sample scored at moderate levels on the measures of resources and work outcomes, though scoring higher of feelings of psychological empowerment. These data indicate potential room for improvement in the work experiences of our nursing respondents. Hierarchical regression analyses controlling for personal demographics indicated that levels of hospital support were significantly and positively associated with most work and well-being outcomes, with levels of optimism significantly and positively associated with fewer of these outcomes. Practical implications of the findings are offered. Hospital efforts to increase levels of optimism and hospital support are described.
Factors Affecting Group Identity of Cluster Structures
Authors: Lis Anna Maria , Lis Adrian
Published: December 2016

The paper provides a new approach to cluster analysis, basing on a sociologically rooted concept of identity. The authors state that identity in cluster structures is formed by two main groups of factors – uncontrollable or slightly controllable factors (identity mix) and factors that can be fully controlled by a cluster initiative (corporate identity mix). It means that the cluster coordinator is able to consciously build the identity of a cluster structure and reinforce the identification of individuals with one another and with the group as a whole. Thus, effective management of a cluster initiative can highly strengthen its identity whereas strong identity interacts back (in a positive way) with the efficiency and stability of a group. By contrast, poor management of an initiative tends to weaken group identity and, in the long term, it can lead to disintegration of the whole cluster initiative. The methods of the study are systemic and logic analysis. More advanced studies are needed to test the concept of identity for cluster structures and confirm the working hypothesis.
Seroprevalence of Ehrlichia Canis Infection in Stray Dogs from Serbia
Authors: Bogićević Nataša , Radovanović Milica Elezović , Vasić Ana , Manić Marija , Marić Jovan , Vojinović Dragica , Rogožarski Dragan , Gligić Ana , Valčić Miroslav
Published: December 2016

Canine Monocytic Ehrlichiosis is a zoonotic bacterial disease with worldwide distribution. With regards to the population of stray dogs, the disease is facilitated due to their lifestyle and the lack of anti-parasitic protection. The aim of this study was to provide serological data on the presence of a specific Ehrlichia canis IgG antibodies in stray dogs, originating from 7 municipalities in Serbia. During the period from April 2013 to June 2014, 217 canine sera were submitted to the laboratory of the Department of Infectious Diseases of Animals and Bees, Faculty of Veterinary Medicine in Belgrade. An immunofluorescent antibody test (IFAT) was performed to detect antibodies to Ehrlichia canis (cut off, 1:50). Seropositive dogs were found in 5 out of 7 counties with a seroprevalence varying from 3.57% to 20% and an overall seroprevalence of 11.06% (24/217). There was no statistically significant difference between the prevalence of infection and the host age or gender. Results showed that stray dogs contribute to maintaining and spreading of Ehrlichia canis in Serbia. Due to the close relationship between people and dogs, it is of great importance to constantly monitor and improve prevention of this disease.
Mallomonas cronbergiae (Chrysophyceae, Stramenopiles), A New Species from the Guineo-Congolian Rainforest in Cameroon
Authors: Piątek Jolanta , Łukaszek Magdalena
Published: December 2016

A new species of Mallomonas Perty, M. cronbergiae J. Piątek sp. nov., was found in a tropical shallow stream pool in the Guineo-Congolian rainforest in Cameroon. It belongs to the series Ouradiotae and is similar to the three other Mallomonas taxa from this series, namely M. ouradion Harris & Bradley, M. parvula Dürrschmidt and M. parvula var. nichollsii Wujek & Bland, but differs in some morphological characters that clearly differentiate M. cronbergiae as a distinct species. The new species has a different size of scales, characteristic 3–7 pores at the posterior rim, an anterior flange ornamented with papillae, and a shield thickly ornamented with papillae (14–16 per scale width). The species is described and illustrated with the use of light and scanning electron microscopy.
Caloplaca monacensis (Teloschistaceae, Lichenized Ascomycota), A Species New for Poland
Authors: Kubiak Dariusz , Wilk Karina
Published: December 2016

Caloplaca monacensis (Leder.) Lettau is reported as a new lichen species for Poland. It is an old species of the Caloplaca cerina group, forgotten for decades and resurrected most recently. This epiphytic species is characteristic for open habitats such as roadside trees. The new records are from northern (Pojezierze Olsztyńskie lakeland) and southern (Carpathians) Poland. Brief taxonomic remarks and data on habitat preferences and the known distribution are provided.
First Confirmed Records of Agrostis scabra (Poaceae, Agrostidinae) in the Chinese Flora
Authors: Paszko Beata , Liu Bing
Published: December 2016

The first confirmed records of Agrostis scabra Willd. are reported from a northeastern Chinese province, Jilin. This extends the native range of the species into China. The recent Flora of China does not include A. scabra. The detailed morphological characters, diagnostic comparisons and habitat are presented, along with a distribution map of A. scabra in East and Northeast Asia.
Phellinus hippophaëicola (Hymenochaetaceae) Is Not Rare in Poland: Findings from the Pobrzeże Szczecińskie Coastland
Authors: Friedrich Stefan
Published: December 2016

The occurrence of Phellinus hippophaëicola H. Jahn, a fungal pathogen of Hippophaë rhamnoides L., on the Pobrzeże Szczecińskie coastland, NW Poland, was surveyed during 2015–2016. Altogether 59 localities of Phellinus hippophaëicola were recorded, including the first Polish inland locatlities on cultivated plants of Hippophaë rhamnoides. The localities are from 18 ATPOL grid squares, including 43 localities on the Baltic Sea coast. Phellinus hippophaëicola occurred at 74% of all the localities of Hippophaë rhamnoides examined, and at ca 84% of the plant’s natural sites. These findings, and also the status of Hippophaë rhamnoides as a protected species occurring in protected habitats in Natura 2000 sites, mean that Phellinus hippophaëicola is not a rare and endangered species in Poland. In total, 69 localities located in 28 ATPOL grid squares, including the localities reported here, are currently known from Poland.