bluuebunny/crossref_metadata_2025_split huggingface dataset:
Multi-UAV Flight using Virtual Structure Combined with Behavioral Approach
Authors: Kownacki Cezary 
Published: June 2016

Abstract
Implementations of multi-UAV systems can be divided mainly into two different approaches, centralised system that synchronises positions of each vehicle by a ground station and an autonomous system based on decentralised control, which offers more flexibility and independence. Decentralisation of multi-UAV control entails the need for information sharing between all vehicles, what in some cases could be problematic due to a significant amount of data to be sent over the wireless network. To improve the reliability and the throughput of information sharing inside the formation of UAVs, this paper proposes an approach that combines virtual structure with a leader and two flocking behaviours. Each UAV has assigned different virtual migration point referenced to the leader's position which is simultaneously the origin of a formation reference frame. All migration points create together a virtual rigid structure. Each vehicle uses local behaviours of cohesion and repulsion respectively, to track its own assigned point in the structure and to avoid a collision with the previous UAV in the structure. To calculate parameters of local behaviours, each UAV should know position and attitude of the leader to define the formation reference frame and also the actual position of the previous UAV in the structure. Hence, information sharing can be based on a chain of local peer-to-peer communication between two consecutive vehicles in the structure. In such solution, the information about the leader could be sequentially transmitted from one UAV to another. Numerical simulations were prepared and carried out to verify the effectiveness of the presented approach. Trajectories recorded during those simulations show collective, coherence and collision-free flights of the formation created with five UAVs.
The Use of Spectral Method for Fatigue Life Assessment for Non-Gaussian Random Loads
Authors: Niesłony Adam , Böhm Michał , Łagoda Tadeusz , Cianetti Filippo 
Published: June 2016

Abstract
The well-known problem with the fatigue lifetime assessment of non-Gaussian loading signals with the use of spectral method has been presented in the paper. A correction factors that transform the non-Gaussian signal into an equivalent Gaussian signal proposed by Bracessi et al. (2009) has been used for the purpose of lifetime calculations together with Palmgren-Miner Hypothesis. The calculations have been performed for the 10HNAP steel under random non-Gaussian load with four dominating frequencies. The signal has been generated on the test stand SHM250 for random tension-compression tests. The results with zero and non-zero mean stresses have been used to calculate the fatigue life with the frequency domain method based on Dirlik’s model and with a time domain method with the use of the rainflow cycle counting algorithm. The obtained calculation results have been compared with experimental results.
Influence of Corrugation Depth on Lateral Stability of Cold-Formed Steel Beams of Corrugated Webs
Authors: Ungureanu Viorel , Dubina Dan 
Published: June 2016

Abstract
The beams of thin corrugated web afford a significant weight reduction compared with hot-rolled or welded ones. In the initial solutions, the flanges are made of flat plates, welded to the sinusoidal web sheet, requiring a specific welding technology. A new solution is proposed by the authors, in which the beam is composed by a web of trapezoidal cold-formed steel sheet and flanges of back-to-back lipped channel sections. For connecting flanges to the web self-drilling screws are used. The paper summarizes the experimental and numerical investigations carried out at the CEMSIG Research Centre (www.ct.upt.ro/centre/cemsig/) of the Politehnica University of Timisoara and, at the end, presents the influence of corrugation depth of web on the lateral stability of the beams.
The Parameter Correlation of Acoustic Emission and High-Frequency Vibrations in the Assessment Process of the Operating State of the Technical System
Authors: Baron Petr , Dobránsky Jozef , Pollák Martin , Kočiško Marek , Cmorej Tomáš 
Published: June 2016

Abstract
The article describes application of selected methods of technical diagnostics for assessing the operating status of precision gearboxes. Within the confines of experimental measurements in the field of physical metallurgy materials of diagnosed system were being examined while taking into account the process of degradation of material properties during operation of monitored gearboxes. Measurements and collecting of dynamic data were realized on 4 selected gearboxes where a high-frequency vibrations and acoustic emission (noise) measurements were carried out. Retrieved values were subsequently used for mutual correlation and verification of applied methods. Results of both selected methods underlined unsatisfactory operation status with 3 inspected gearboxes. Measured values were identified as being above suggested caution limit of Alarm 2, representing a level of danger.
Direct Current and Pulsed Direct Current Plasma Nitriding of Ferrous Materials a Critical Review
Authors: Łępicka Magdalena , Grądzka-Dahlke Małgorzata 
Published: June 2016

Abstract
Nowadays, the improvement of ferrous materials performance is a problem of high interest. One of well-known wear- and corrosion properties improving technique is plasma nitriding, in which elemental nitrogen is introduced to the surface of a metal part for subsequent diffusion into the material. As a result, a compound, “white” layer and a diffusion zone are formed at the detail’s surface. Most of the authors positively describe the effects of surface ion nitiding. On the other hand, there are also reports on adverse effects of direct current and pulsed direct current plasma nitriding on ferrous materials performance. Therefore, an attempt to provide comprehensive summary on direct current and pulsed direct current ion nitriding and its influence on ferrous materials’ mechanical and corrosion properties has been made. According to the results, some of the technique drawbacks are hard to avoid in mass production.
Harnack inequality for non-divergence structure semi-linear elliptic equations
Authors: Mohammed Ahmed , Porru Giovanni 
Published: June 2016

AbstractIn this paper we establish a Harnack inequality for non-negative solutions ofL⁢u=f⁢(u){Lu=f(u)}whereLis a non-divergence structure uniformly elliptic operator andfis a non-decreasing function that satisfies an appropriate growth conditions at infinity.
A Note on the Sign-Changing Solutions for a Double Critical Hardy–Sobolev–Maz’ya Problem
Authors: Wang Chunhua , Yang Jing 
Published: June 2016

Abstract
In this paper, we investigate the following double critical Hardy–Sobolev–Maz’ya problem:

{

-

Δ
⁢
u

=

μ
⁢

|
u
|

2
*

⁢

(
t
)

-
2

⁢
u

|
y
|

t

+

|
u
|

2
*

⁢

(
s
)

-
2

⁢
u

|
y
|

s

+

a
⁢

(
x
)

⁢
u

in
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Ω

,

u
=
0

on
⁢

∂
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Ω

,

$\left\{\begin{aligned} &\displaystyle{-}\Delta u=\mu\frac{|u|^{2^{*}(t)-2}u}{|% y|^{t}}+\frac{|u|^{2^{*}(s)-2}u}{|y|^{s}}+a(x)u&&\displaystyle\text{in }\Omega% ,\\ &\displaystyle u=0&&\displaystyle\text{on }\partial\Omega,\end{aligned}\right.$

where

μ
≥
0

${\mu\geq 0}$

,

a
⁢

(
x
)

>
0

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,

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*

⁢

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t
)

=

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t

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${2^{*}(t)=\frac{2(N-t)}{N-2}}$

,

2
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⁢

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s
)

=

2
⁢

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N
-
s

)

N
-
2

${2^{*}(s)=\frac{2(N-s)}{N-2}}$

,

0
≤
t
<
s
<
2

${0\leq t<s<2}$

,

x
=

(
y
,
z
)

∈

ℝ
k

×

ℝ

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-
k

${x=(y,z)\in\mathbb{R}^{k}\times\mathbb{R}^{N-k}}$

,

2
≤
k
<
N

,

(
0
,

z
*

)

∈

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¯

$2\leq k<N,(0,z^{*})\in\bar{\Omega}$

and Ω is an open bounded domain in

ℝ
N

${\mathbb{R}^{N}}$

. By applying an abstract theorem presented in [42], we prove that if

N
>

6
+
t

${N>6+t}$

when

μ
>
0

,

${\mu>0,}$

and

N
>

6
+
s

${N>6+s}$

when

μ
=
0

,

${\mu=0,}$

and Ω satisfies some geometric conditions, then the above problem has infinitely many sign-changing solutions. The main tool is to estimate the Morse indices of these nodal solutions.
Microstructure of Longissimus Lumborum Muscle and Meat Quality of Native Polish Pig Breeds: Złotnicka Sp Otted and Puławska
Authors: Bogucka Joanna , Kapelański Wojciech 
Published: June 2016

Abstract
In 50 fattening pigs representing two Polish native breeds: 24 Złotnicka Spotted, 10 Puławska and 16 F1 ♀ (Polish Large White × Polish Landrace) × F1 ♂ (Duroc × Pietrain) crosses microstructure of muscle, carcass and meat quality were studied. Puławska pigs had the thickest backfat, but the loin eye area was smaller only in comparison to crossbreds. Compared to the Puławska breed, the meat of Złotnicka Spotted pigs was darker, which was associated with a greater percentage of type I fibres and a smaller percentage of type IIB fibres. Puławska pigs distinguished themselves from the other groups under study by the greatest density of fibres per mm2. Smaller diameter of type IIA and IIB fibres and higher total number of fibres were found in Puławska breed pigs compared to Złotnicka Spotted, despite the absence of differences in the loin eye area. Smaller thickness of the fibres favourably affects meat quality, and might be considered an indicator of a delicate structure of meat.
Feed additives regulating calcium homeostasis in the bones of poultry – a review
Authors: Kwiatkowska Katarzyna , Winiarska-Mieczan Anna , Kwiecień Małgorzata 
Published: June 2016

Abstract
The strength of leg bones is not only genetically determined but it also depends on the gender, age, health condition and nutrition of slaughter birds. Calcium ions deficit in bones results in the deterioration of skeleton structure and reduction of bone strength. The presented work compiles the results of studies concerning the effect of feed additives on the level of calcium in the bones of broiler chickens, published during the past 10 years. From the analysis of available literature it follows that some additives had a positive effect on the accumulation of calcium (e.g. vitamin D, probiotics, prebiotics and synbiotics), some were not very explicit (e.g. ascorbic acid and phytase), while others did not have a significant effect on the accumulation of calcium in bones (e.g. herbs and chelates). It is concluded from our collected information that the use of probiotics, prebiotics and synbiotics offers the best advantages for poultry. These additives, apart from stimulating the accumulation of calcium in bones, also benefit animal health.
Effects of Different Sources of Fat in the Diet of Pigs on the Liver Transcriptome Estimated by RNA-Seq
Authors: Oczkowicz Maria , Świątkiewicz Małgorzata , Ropka-Molik Katarzyna , Gurgul Artur , Żukowski Kacper 
Published: June 2016

Abstract
In this study, we have attempted to analyse the impact of dietary fats on the liver transcriptome in pigs. Four nutritional groups were created. The animals’ diets differed among groups in terms of the presence of corn dried distillers’ grains with solubles (DDGS) (group I - no DDGS, groups II, III, IV - 20% DDGS) as well as the type of fat (rapeseed oil - groups I and II, beef tallow - group III, coconut oil - group IV) used. Using the RNA-Seq method we identified 39 differentially expressed genes (DEGs) as a result of Cuffdiff analysis of the differences among all groups. Analysis of these genes with Panther Gene Classification System revealed that among identified DEGs, genes responsible for lipid and fatty acids metabolism are overrepresented as well as the genes engaged in oxidoreductase and catalytic activity. The article presents for the first time the RNAseq analysis of the liver transcriptome in pigs fed with different sources of fats. The results may be useful for the elaboration of new therapies for cardiovascular diseases in humans as well as for the preparation of new nutrition strategies in animals.
Nutritional Value of Yarrowia Lipolytica Yeast and its Effect on Growth Performance Indicators n Piglets
Authors: Czech Anna , Smolczyk Aleksandra , Ognik Katarzyna , Kiesz Martyna 
Published: June 2016

Abstract
Yarrowia lipolytica yeast can be a valuable component of feed compounds due to its high content of protein and essential amino acids, as well as minerals. The objective of the study was to verify the research hypothesis that Yarrowia lipolytica (YL) yeast, having a more valuable chemical composition than Saccharomyces cerevisiae (SC), can improve growth performance in piglets. An attempt was made to determine what proportion of YL yeast in a compound feed for piglets would produce measurable effects in terms of production and health. The experiment was carried out on 46-dayold piglets receiving experimental mixtures for 39 days. The piglets in the experimental groups were fed the same mixture as the control, but with 3% or 6% fodder yeast of the strain Yarrowia lipolytica A-101 in place of soybean meal. The YL fodder yeast had significantly higher content of alanine (by about 50%), lysine, isoleucine and tryptophan (over 30%), leucine, valine, glycine and glutamic acid (over 20%), and tyrosine (by about 17%) in comparison with SC yeast. Content of crude fat was three times higher than in SC yeast. YL yeast had significantly higher content of Na+, K+, Ca+2, Mn+2, S, Mg+2 and Zn+2 than SC, as well as significantly higher content of vitamins B2 and E. Yarrowia lipolytica fodder yeast introduced to compound feed in the amount of just 3% improved growth performance (an increase in daily weight gain and a decrease in feed conversion per kg weight gain). These results indicate that YL in the amount of 3% in compound feed can be successfully used in the diet of piglets in place of the commonly used SC.
Forschungsdatenmanagement an der Universität Münster
Authors: Tröger Beate 
Published: June 2016

Zusammenfassung
Forschungsdatenmanagement ist eine der großen aktuellen Herausforderungen für Universitäten, liegen Kenntnisstand und aktuelles Handeln in vielen Fachkontexten doch noch entfernt von den Anforderungen etwa der Drittmittelgeber. Eine umfangreiche Befragung diente an der Universität Münster zur Herausarbeitung von entsprechenden Handlungsbedarfen im Umgang mit der sehr komplexen Materie.
On prefermentative maceration techniques: statistical analysis of sensory descriptors in Sangiovese wine
Authors: Magrini Alessandro , Pantani Ottorino L. , Bartolini Alessandra Biondi , Stefanini Federico M. 
Published: June 2016

Summary
The analysis of wine sensory descriptors is a fundamental step in the improvement of wine making, because the procedures are judged just before bottled wine is ready for consumption. Despite several contributions in the literature, traditional analysis of variance methods are not adequate to analyse sensory descriptors, because they are defined on ordinal scales. In this paper, we exploit cumulative link mixed models in a three-way full factorial design to assess the effect of prefermentative maceration, temperature and saignée on wine sensory descriptors. Using cumulative link mixed models, the bias introduced by assessors’ judgement and the ordinal scale of sensory descriptors are taken into account. The results were the following: the application of prefermentative maceration techniques did not lead to an improvement in the sensory profile of wines after a year from bottling; wines treated with saignée showed greater intensity in olfactive descriptors; and higher fermentation temperatures resulted in wines that were generally more concentrated.
The comparison of three models applied to the analysis of a three-factor trial on hybrid maize (Zea mays L.) cultivars
Authors: Szulc Piotr , Mejza Iwona , Ambroży-Deręgowska Katarzyna , Nowosad Kamila , Bocianowski Jan 
Published: June 2016

Summary
The aim of this paper is to present the comparison of three models applied to the analysis of a one-year study of protein yield for two types of hybrid maize cultivars under different forms of nitrogen fertilizer and doses of magnesium. The field trial was conducted in 2010 at the Agricultural Experimental Station in Swadzim (Poland). The results obtained were analyzed in terms of three randomization-derived models of observations. Consideration was given to three mixed systems, which are combinations of split-plot design, split-block design and randomized complete block design. The relative efficiency of the designs with respect to estimation of some comparisons among treatment combination effects was examined. Particular attention was paid to the interaction between cultivars and nitrogen fertilization.
Extraordinary biological properties of a new calcium hydroxyapatite/poly(lactide-co-glycolide)-based scaffold confirmed by in vivo investigation
Authors: Jokanović Vukoman , Čolović Božana , Marković Dejan , Petrović Milan , Soldatović Ivan , Antonijević Djordje , Milosavljević Petar , Sjerobabin Nikola , Sopta Jelena 
Published: June 2016

Abstract
This study examined the potential of a new porous calcium hydroxyapatite scaffold covered with poly (lactide-co-glycolide) (PLGA) as a bone substitute, identifying its advantages over Geistlich Bio-Oss®, considered the gold standard, in in vivo biofunctionality investigations. Structural and morphological properties of the new scaffold were analyzed by scanning electron and atomic force microscopy. The biofunctionality assays were performed on New Zealand white rabbits using new scaffold for filling full-thickness defects of critical size. The evaluated parameters were: the presence of macrophages, giant cells, monoocytes, plasma cells, granulocytes, neoangiogenesis, fibroplasia, and the percentage of mineralization. Parallel biofunctionality assays were performed using Geistlich Bio-Oss®. The appearance of bone defects 12 weeks after the new scaffold implantation showed the presence of a small number of typical immune response cells. Furthermore, significantly reduced number of capillary buds, low intensity of fibroplasia and high degree of mineralization in a lamellar pattern indicated that the inflammation process has been almost completely overcome and that the new bone formed was in the final phase of remodeling. All biofunctionality assays proved the new scaffold’s suitability as a bone substitute for applications in maxillofacial surgery. It showed numerous biological advantages over Geistlich Bio-Oss® which was reflected mainly as a lower number of giant cells surrounding implanted material and higher degree of mineralization in new formed bone.
Mechanical properties of contemporary orthodontic adhesives used for lingual fixed retention
Authors: Sifakakis Iosif , Zinelis Spiros , Patcas Raphael , Eliades Theodore 
Published: June 2016

Abstract

Objective:
The aim of the present study was to test the mechanical properties of different adhesives used in orthodontics for fixed retainers and to investigate their possible interrelations.

Materials and methods:
Specimens of six different adhesive resins were prepared: Transbond XT, Transbond LR and an experimental BPA-free orthodontic adhesive, as well as IPS Empress Direct (IPS-ED), ZNano and Accolade. The mechanical properties tested were Martens hardness (HM), indentation modulus (EIT), the ratio of elastic to total work, commonly known as elastic index (ηIT) and Vickers hardness (HV). These properties were determined using instrumented indentation testing according to ISO 14577-2002. The results of the aforementioned properties were statistically compared with one-way ANOVA-test and Student-Newman-Keuls multiple comparison test at a=0.05, while possible correlations among the properties tested were analyzed by Pearson correlation.

Results:
Significant differences were identified among all the materials tested for HM, with Transbond LR presenting the highest value. This resin presented the highest EIT too. Significant EIT differences were identified among the materials and only ZNano and IPS-ED showed no significant differences for this property. Transbond LR and ZNano showed higher HV values. ZNano demonstrated the highest elastic index. Pearson analysis showed a strong positive correlation between HM and EIT (0.970), HM and HV (0.837), and EIT and HV (0.695), while a weak negative correlation was found between EIT and elastic index (-0.505).

Conclusions:
The materials tested demonstrated significant differences in their mechanical properties, and thus differences in their clinical performance are anticipated.
The history of hysteria and what’s next…
Authors: Hłodzik Klemens , Dziwota Ewelina , Karakuła-Juchnowicz Hanna , Olajossy Marcin 
Published: June 2016

Abstract
From the ancient times up till now hysteria has been a mysterious and intriguing issue. The authors of this article using mainly the work of Etienne Trillat of the same title, present the most important facts from the history of hysteria. Our work shows how notions of hysteria known initially as uterine dyspnoea, which was the term used by Hippocrates in the seventh tome of his “Collected Works” evolved step by step. At the end of 1st century AD a newcomer to Rome, Soranus of Ephesus, as an experienced anatomist in his “Treatise on midwifery and the diseases of women” moved away from the old ideas of Plato and Hippocrates equating uterus to an animal. How did views on hysteria develop throughout Middle Ages, Renaissance or World Wars period? In this article the authors are trying to determine the nature of hysteria as well as what remained from hysteria in the contemporary times, depicting hysteria’s elusiveness as a disease, many difficulties with its definition and connection with many shocking events in history of mankind. From the ancient sages, through Kramer, Sprenger, Wier, Harvey, Willis, Sydenham, Blackmore up until Mesmer, Freud and many others. From hysteric witches, beings suffering from vapors, through sensitive, fragile and musing women up until mythomaniacs, nymphomaniacs and what we define today as histrionic personality disorder. In the words of French neurologist and a creator of psychiatry – Charcot – hysteria existed forever, everywhere and all-time. Why did it vanish though? Authors of this article will address this problem in the final part, trying to determine the cause.
Raynaud’s phenomenon in a newborn: case report and review of the literature
Authors: Zampetti Anna , Atzori Sebastiana , Linder Michael D. , Cataldi Luigi 
Published: June 2016

Abstract
Raynaud’s phenomenon is a paroxysmal and recurrent vasospasm phenomenon characterized by tricolour changes in extremities, commonly hands and feet, triggered by exposure to cold. When isolated it is described as primary, and secondary when associated with other medical conditions. It is usually more common in young adults and is rare in children and very rare in infants. Here, we report a case of Raynaud phenomenon in the immediate postnatal period and review the medical literature on this subject.