bluuebunny/crossref_metadata_2025 huggingface dataset:
Povezave med izbranimi dejavniki tveganja in pojavnostjo bolečine v križu pri zdravstvenem osebju
Authors: Demšar Andreja , Zurc Doc. dr. Joca , Skela Savič Izr. prof. dr. Brigita
Published: March 2016

Uvod: Bolečina v lumbalnem predelu predstavlja pogosto zdravstveno težavo med zdravstvenim osebjem. Z raziskavo smo želeli ugotoviti, kako pogosto se bolečine v križu pojavljajo pri zdravstvenem osebju, in sicer v povezavi z izbranimi dejavniki tveganja.

Metode: Raziskava temelji na neeksperimentalni kvantitativni metodi empiričnega raziskovanja. Uporabili smo vprašalnik zaprtega tipa o bolečini v križu, ki ga je izpolnilo 89 zdravstvenih delavcev v Splošni bolnišnici Jesenice in domu upokojencev na področju Gorenjske. Za ugotavljanje statistično značilnih razlik med skupinami smo uporabili test χ2 in enofaktorsko analizo variance.

Rezultati: Bolečina v križu se pri 40,4 % zdravstvenega osebja pojavlja večkrat na mesec, najpogosteje pri bolničarjih (p = 0,001) in zaposlenih na negovalnem oddelku (p = 0,006). Povprečno traja manj kot en teden (43,8 %). Dejavnik, ki je z njo najbolj povezan, je dvigovanje in prenašanje bremen (x = 4,5). Glede izobraževanj s področja bolečine v križu in pravilnega dvigovanja bremen obstajajo statistično značilne razlike med poklicnimi skupinami (p < 0,010).

Diskusija in zaključek: Z bolečino so najbolj povezani dejavniki, ki nastanejo zaradi neposrednega fizičnega dela s pacientom. Potrebna so nadaljnja raziskovanja na reprezentativnih vzorcih, treba bi bilo izvesti tudi izobraževanja za zaposlene in uvesti nove pripomočke, ki bi jih zdravstveno osebje uporabljalo pri svojem delu s pacientom.
Gradnja strokovnih zmogljivosti zaposlenih v zdravstveni negi
Authors: Peterka Novak Jožica
Published: March 2016

Uvod: Izobraževanja prispevajo k strokovnemu znanju. Vplivajo na produktivnost in prožnost zaposlenih, izide zdravstvene oskrbe, kakovost obravnave, zadovoljstvo pacientov, svojcev in zaposlenih. Namen raziskave je bil ugotoviti mnenje udeležencev o izvedenih seminarjih in predlagati usmeritve in priporočila.
Metode: Izvedena je bila kvantitativna metoda raziskovanja v letu 2014. Vprašalnik so udeleženci (n = 242) izpolnili na dan seminarja. Razdeljen je bil na štiri sklope: ocena dogodka (kraj, čas, tema, obveščenost, registracija, organizacija, gradivo), ocena strokovnih vsebin in ocena predavatelja, ocena časa izvedbe predavanj, učnih delavnic, razprav, podajanje mnenj udeležencev. Pridobljene podatke smo opisno analizirali. Izračunane so bile frekvence, odstotek, preizkus χ2 z razmerjem verjetij.
Rezultati: Med seminarji obstajajo statistično pomembne razlike v kakovosti gradiv (χ2 = 34,082, p 0,018). V zvezi z vsebinami obstajajo statistično pomembne razlike v izpolnitvi pričakovanj udeležencev glede na starost v skupini od 31 do 40 let (χ2 = 9,735, p > 0,021).
Diskusija in zaključek: Udeleženci so imeli visok nivo zadovoljstva z organizacijo, izborom tem in vsebinami. Izboljšave so potrebne pri pripravi gradiv, pri izboru kompetentnih predavateljev in v trajanju delavnic.
A competency-based performance appraisal for nurse leaders
Authors: Kvas Andreja , Seljak Janko
Published: March 2016

Introduction: An employee performance appraisal is used internationally to improve employee performance, productivity, efficiency and effectiveness in nursing care. The purpose of the study was to assess the performance and efficiency of nurse leaders at all levels of leadership, identify deficient areas for each individual leader and propose improvements.

Methods: Two surveys were conducted in 15 Slovenian public hospitals. The sample from the first survey included 1311 nurses who assessed the level of competencies of their immediate superiors. The sample from the second survey included 236 nurse leaders. Data envelopment analysis is used in this study to develop a model of practice outputs and inputs to help identify the most efficient nurse leaders.

Results: Significant differences exist in the performance appraisal among the leaders in nursing. A total of 203 (86 %) nurse leaders are defined as inefficient and could improve their leadership performance. On average, inefficient leaders could improve their behaviour most in the areas of generic leadership competencies (by 51.7 %) and interprofessional relationships (by 47.7 %).

Discussion and conclusion: The areas with the worst performance are generic leadership competencies and interprofessional relationships where also the most significant improvements are possible. Nurse leaders and hospital managers can use the analysis results to determine in which areas the leaders in their organisation should improve the levels of their competencies.
Profesionalizem v zdravstveni negi: kje smo z njim?
Authors: Skela-Savič Brigita
Published: March 2016

.
On the existence of bound and ground states for some coupled nonlinear Schrödinger–Korteweg–de Vries equations
Authors: Colorado Eduardo
Published: March 2016

We show the existence of positive bound and ground states for a system of coupled nonlinear Schrödinger–Korteweg–de Vries equations. More precisely, we prove that there exists a positive radially symmetric ground state if either the coupling coefficient satisfies

β
>
Λ

{\beta>\Lambda}

(for an appropriate constant

Λ
>
0

{\Lambda>0}

) or if

β
>
0

{\beta>0}

under appropriate conditions on the other parameters of the problem. We also prove that there exists a positive radially symmetric bound state if either

0
<
β

{0<\beta}

is sufficiently small or if

0
<
β
<
Λ

{0<\beta<\Lambda}

under some appropriate conditions on the parameters. These results give a classification of positive solutions as well as the multiplicity of positive solutions. Furthermore, we study systems with more general power nonlinearities and systems with more than two nonlinear Schrödinger–Korteweg–de Vries equations. Our variational approach (working on the full energy functional without the

L
2

{L^{2}}

-mass constraint) improves many previously known results and also allows us to show new results for some range of parameters not considered in the past.
High-resolution headlamp
Authors: Gut Carsten , Cristea Iulia , Neumann Cornelius
Published: March 2016

The following article shall describe how human vision by night can be influenced. At first, front lighting systems that are already available on the market will be described, followed by their analysis with respect to the positive effects on traffic safety. Furthermore, how traffic safety by night can be increased since the introduction of high resolution headlamps shall be discussed.
Review of freeform TIR collimator design methods
Authors: Talpur Taimoor , Herkommer Alois
Published: March 2016

Total internal reflection (TIR) collimators are essential illumination components providing high efficiency and uniformity in a compact geometry. Various illumination design methods have been developed for designing such collimators, including tailoring methods, design via optimization, the mapping and feedback method, and the simultaneous multiple surface (SMS) method. This paper provides an overview of the different methods and compares the performance of the methods along with their advantages and their limitations.
Informal Insurance Networks
Authors: Gao Wayne Yuan , Moon Eunyoung
Published: March 2016

This paper develops a model of risk sharing in which each individual’s income shock is locally shared ex-post given an ex-ante strategically formed network. Emphasizing the informational constraint of the network such that transfers can only be contingent on local information, the model provides characterizations of the ex-ante efficient network and the pairwise stable networks. While it is no surprise that the unique efficient network is the complete graph, it is interesting that any pairwise stable network features low average degree and almost 2-regular structures, even under individual risk heterogeneity, and it tends to exhibit positive assortativity in terms of risk variances. If expected incomes are also locally shared in addition to income shocks, the pairwise stable network may become more densely connected, achieving efficiency under certain parameter values.
Modeling and performance evaluation of a robotic treatment couch for tumor tracking
Authors: Jöhl Alexander , Lang Stephanie , Ehrbar Stefanie , Guckenberger Matthias , Klöck Stephan , Meboldt Mirko , Schmid Daners Marianne
Published: March 2016

Tumor motion during radiation therapy increases the irradiation of healthy tissue. However, this problem may be mitigated by moving the patient via the treatment couch such that the tumor motion relative to the beam is minimized. The treatment couch poses limitations to the potential mitigation, thus the performance of the Protura (CIVCO) treatment couch was characterized and numerically modeled. The unknown parameters were identified using chirp signals and verified with one-dimensional tumor tracking. The Protura tracked chirp signals well up to 0.2 Hz in both longitudinal and vertical directions. If only the vertical or only the longitudinal direction was tracked, the Protura tracked well up to 0.3 Hz. However, there was unintentional yet substantial lateral motion in the former case. And during vertical motion, the extension caused rotation of the Protura around the lateral axis. The numerical model matched the Protura up to 0.3 Hz. Even though the Protura was designed for static positioning, it was able to reduce the tumor motion by 69% (median). The correlation coefficient between the tumor motion reductions of the Protura and the model was 0.99. Therefore, the model allows tumor-tracking results of the Protura to be predicted.
Existence of renormalized solutions for strongly nonlinear parabolic problems with measure data
Authors: Akdim Youssef , Benkirane Abdelmoujib , El Moumni Mostafa , Redwane Hicham
Published: March 2016

We study the existence result of a renormalized solution for a class
of nonlinear parabolic equations of the form

∂
⁡
b

⁢

(
x
,
u
)

∂
⁡
t

-

div
⁡

(

a
⁢

(
x
,
t
,
u
,

∇
⁡
u

)

)

+

g
⁢

(
x
,
t
,
u
,

∇
⁡
u

)

+

H
⁢

(
x
,
t
,

∇
⁡
u

)

=

μ
 

in
⁢
Ω

×

(
0
,
T
)

,

${\partial b(x,u)\over\partial t}-\operatorname{div}(a(x,t,u,\nabla u))+g(x,t,u%
,\nabla u)+H(x,t,\nabla u)=\mu\quad\text{in }\Omega\times(0,T),$

where the right-hand side belongs to

L
1

⁢

(

Q
T

)

+

L

p
′

⁢

(
0
,
T
;

W

-
1

,

p
′

⁢

(
Ω
)

)

${L^{1}(Q_{T})+L^{p^{\prime}}(0,T;W^{-1,p^{\prime}}(\Omega))}$

and

b
⁢

(
x
,
u
)

${b(x,u)}$

is
unbounded function of u,

-

div
⁡

(

a
⁢

(
x
,
t
,
u
,

∇
⁡
u

)

)

${{-}\operatorname{div}(a(x,t,u,\nabla u))}$

is a Leray–Lions type operator with growth

|

∇
⁡
u

|

p
-
1

${|\nabla u|^{p-1}}$

in

∇
⁡
u

${\nabla u}$

. The critical growth condition on g is with respect to

∇
⁡
u

${\nabla u}$

and there is no growth condition with respect to u, while the function

H
⁢

(
x
,
t
,

∇
⁡
u

)

${H(x,t,\nabla u)}$

grows as

|

∇
⁡
u

|

p
-
1

${|\nabla u|^{p-1}}$

.
A systematic comparison of two new releases of exome sequencing products: the aim of use determines the choice of product
Authors: Altmüller Janine , Motameny Susanne , Becker Christian , Thiele Holger , Chatterjee Sreyoshi , Wollnik Bernd , Nürnberg Peter
Published: March 2016

We received early access to the newest releases of exome sequencing products, namely Agilent SureSelect v6 (Agilent, Santa Clara, CA, USA) and NimbleGen MedExome (Roche NimbleGen, Basel, Switzerland), and we conducted whole exome sequencing (WES) of several DNA samples with each of these products in order to assess their performance. Here, we provide a detailed evaluation of the original, normalized (with respect to the different target sizes), and trimmed data sets and compare them in terms of the amount of duplicates, the reads on target, and the enrichment evenness. In addition to these general statistics, we performed a detailed analysis of the frequently mutated and newly described genes found in ‘The Deciphering Developmental Disorders Study’ published very recently (Fitzgerald, T.W., Gerety, S.S., Jones, W.D., van Kogelenberg, M., King, D.A., McRae, J., Morley, K.I., Parthiban, V., Al-Turki, S., Ambridge, K., et al. (2015). Large-scale discovery of novel genetic causes of developmental disorders. Nature 519, 223–228.). In our comparison, the Agilent v6 exome performs better than the NimbleGen’s MedExome both in terms of efficiency and evenness of coverage distribution. With its larger target size, it is also more comprehensive, and therefore the better choice in research projects that aim to identify novel disease-associated genes. In contrast, if the exomes are mainly used in a diagnostic setting, we see advantages for the new NimbleGen MedExome. We find a superior coverage here in those genes of high clinical relevance that likely allows for a better detection of relevant, disease-causing mutations.
Mitosis and mitochondrial priming for apoptosis
Authors: Pedley Robert , Gilmore Andrew P.
Published: March 2016

Cell division is a period of danger for cells, as inaccurate segregation of chromosomes can lead to loss of cell viability or aneuploidy. In order to protect against these dangers, cells ultimately initiate mitochondrial apoptosis if they are unable to correctly exit mitosis. A number of important chemotherapeutics exploit this response to delayed mitotic exit, but despite this, the molecular mechanism of the apoptotic timer in mitosis has proved elusive. Some recent studies have now shed light on this, showing how passage through the cell cycle fine-tunes a cell’s apoptotic sensitivity such that it can respond appropriately when errors arise.
Fire Department Turnout Times: A Contextual Analysis
Authors: Reglen Dennis , Scheller Daniel S.
Published: March 2016

Fire departments nationwide seek to decrease their turnout times to emergencies. Turnout time is the time from which a dispatcher alerts a fire unit of an emergency to when the unit leaves the fire station. As such, it is an integral component of emergency response time. The National Fire Protection Association has set a 60 second standard for effective turnout. We examine how station design of dormitory location and the time of day of the emergency affect turnout times. Previous research indicates that the location of a station’s dormitory is major component of turnout time. Moving beyond descriptive statistics, we present a causal model and interactive hypothesis. Contrary to previous research, we hypothesize that the effect of station design is conditional upon the time of emergency – that above-the-garage dormitories have longer turnout times during the graveyard shift. We find that station design, per se, does not affect turnout time. We find that the effect of station design on turnout time is conditional upon the time of day of the emergency. Above-the-garage dormitories experience 10.7% longer turnout times, but during the graveyard shift. Across all station designs, the graveyard shift increases turnout times between 50.8% and 58.9%.
Population as a Proxy for Infrastructure in the Determination of Event Response and Recovery Resource Allocations
Authors: Stamber Kevin L. , Unis Carl J. , Shirah Donald N. , Gibson Jessica A. , Fogleman William E. , Kaplan Paul
Published: March 2016

Research into modeling of the quantification and prioritization of resources used in the recovery of lifeline critical infrastructure following disruptive incidents, such as hurricanes and earthquakes, has shown several factors to be important. Among these are population density and infrastructure density, event effects on infrastructure, and existence of an emergency response plan. The social sciences literature has a long history of correlating the population density and infrastructure density at a national scale, at a country-to-country level, mainly focused on transportation networks. This effort examines whether these correlations can be repeated at smaller geographic scales, for a variety of infrastructure types, so as to be able to use population data as a proxy for infrastructure data where infrastructure data is either incomplete or insufficiently granular. Using the best data available, this effort shows that strong correlations between infrastructure density for multiple types of infrastructure (e.g. miles of roads, hospital beds, miles of electric power transmission lines, and number of petroleum terminals) and population density do exist at known geographic boundaries (e.g. counties, service area boundaries) with exceptions that are explainable within the social sciences literature. The correlations identified provide a useful basis for ongoing research into the larger resource utilization problem.
Performance Analysis of DWDM System for Different Modulation Schemes Using Variations in Channel Spacing
Authors: Sharma Divya , Prajapati Y. K.
Published: March 2016

This paper reflects the analytical study of dense wavelength division multiplexed optical network with different number of channels at various channel spacing in order to achieve higher data rates by means of few advanced modulation schemes. Bit error rate and quality factor are being analyzed with the variation in number of channels, channel spacing and transmission length of fiber. Advanced modulation schemes being compared here are carrier suppressed return to zero (CSRZ), duobinary return to zero (DRZ), modified duobinary return to zero (MDRZ), 33 % differential phase shift keying (33 % DPSK), 66 % DPSK and differential quaternary phase shift keying (DQPSK). It is keenly observed that CSRZ scheme with 100 GHz channel spacing serves best performance in terms of max. Q factor, min. BER and maximum transmission coverage upto 4,000 km for 16 and 32 channels DWDM system since CSRZ is high tolerant to nonlinear effects. On the other hand, MDRZ scheme with 75 GHz channel spacing exhibits transmission coverage upto 4,000 km and 4,500 km for 16 and 32 channels respectively, but with degraded signal due to effect of inter symbol interference (ISI).
The Impact of the Initial Condition on Covariate Augmented Unit Root Tests
Authors: Aristidou Chrystalleni , Harvey David I. , Leybourne Stephen J.
Published: March 2016

We examine the behaviour of OLS-demeaned/detrended and GLS-demeaned/detrended unit root tests that employ stationary covariates, as proposed by Hansen (1995, “Rethinking the Univariate Approach to Unit Root Testing.” Econometric Theory 11:1148–71) and Elliott and Jansson (2003, “Testing for Unit Roots with Stationary Covariates.” Journal of Econometrics 115:75–89), respectively, in situations where the magnitude of the initial condition of the time series under consideration may be non-negligible. We show that the asymptotic power of such tests is very sensitive to the initial condition; OLS- and GLS-based tests achieve relatively high power for large and small magnitudes of the initial condition, respectively. Combining information from both types of test via a simple union of rejections strategy is shown to effectively capture the higher power available across all initial condition magnitudes.
Biogeography and conservation of non-volant mammals from the Urucum Mountains: a Chiquitano dry forest ecoregion in western Brazil
Authors: Hannibal Wellington , Godoi Mauricio Neves , Tomas Walfrido Moraes , Porfirio Grasiela , Ferreira Vanda Lúcia , Cáceres Nilton
Published: March 2016

The distributional data of mammalian fauna are important to reach a comprehensive overview of biogeographic patterns and to highlight regional conservation status, especially in a poorly known region such as the Chiquitano dry forest in western Brazil. Our aims were to survey the mammal species occurring in the Urucum Mountains, located in the southeast end of the Chiquitano forest, compare its species composition to areas elsewhere in different ecoregions, and discuss their conservation statuses. Small mammals were sampled using pitfall and live traps, and medium and large mammals were sampled by direct observation, indirect evidence (e.g. faeces and tracks), and camera traps. Patterns of species composition were compared to other surrounding areas of different ecoregions in South America using multivariate analyses. The results indicated that both faunas have similar biogeographical influences. The Urucum Mountains have an influence on the faunas from the Cerrado, Chaco and Pantanal ecoregions, and only secondarily from forested ecoregions (e.g. Amazon forest). The Urucum harbours a rich non-volant mammalian fauna with species that are widely and restrictedly distributed. The conservation of Urucum Mountains is important because these mountains harbour threatened plant, invertebrate, and vertebrate (mammals) species, which could be suffering due to the mining activity carried out in the region. We stress that the Chiquitano dry forest is unique to western Brazil, situated in a complex biogeographical region, and harbouring a rich and diversified mammal fauna.
Some heteroleptic boron derivatives and their isomers derived from Schiff bases and glycol: synthesis, characterization and antimicrobial activities
Authors: Jangir Vinita , Sharma Jyoti , Sharma Ram Avatar , Singh Yashpal
Published: March 2016

Some new heteroleptic boron derivatives of the type
Characterization and physical properties of hydrated zinc borates synthesized from sodium borates
Authors: Kipcak Azmi Seyhun , Senberber Fatma Tugce , Yildirim Meral , Yuksel Sureyya Aydin , Derun Emek Moroydor , Tugrul Nurcan
Published: March 2016

In this study, Zn
The crystal structure of 1,2-bis(2-pyrazinecarboxamido)-benzene, C16H12N6O2
Authors: Habarurema Gratien , Gerber Thomas I. A. , Hosten Eric C. , Betz Richard
Published: March 2016

C16H12N6O2, monoclinic, P21/c, a = 11.2912(9) Å, b = 9.4979(6) Å, c = 14.5778(10) Å, β = 109.955(3)°, V = 1469.50(18) Å3, Z = 4, R
gt(F) = 0.0421, wR
ref(F
2) = 0.1049, T = 200 K.
Crystal structure of 1,1′-(butane-1,4-diyl)bis(5-methyl-1H-pyrazole-3-carbaldehyde), C14H18N4O2
Authors: Radi Smaail , El-Massaoudi Mohamed , Mabkhot Yahia N. , Barakat Assem , Ghabbour Hazem A.
Published: March 2016

C14H18N4O2, monoclinic, P21/c (no. 14), a = 4.4260(9) Å, b = 14.502(4) Å, c = 11.455(3) Å, β = 96.319(5)°, V = 730.8(3) Å3, Z = 2, R
gt
(F) = 0.0712, wR
ref
(F
2
) = 0.1946, T = 296(2) K.
Other-initiated Repair in Argentine Sign Language
Authors: Manrique Elizabeth
Published: March 2016

Other-initiated repair is an essential interactional practice to secure mutual understanding in everyday
interaction. This article presents evidence from a large conversational corpus of a sign language, showing that
signers of Argentine Sign Language (Lengua de Señas Argentina or ‘LSA’), like users of spoken languages, use a
systematic set of linguistic formats and practices to indicate troubles of signing, seeing and understanding. The
general aim of this article is to provide a general overview of the different visual-gestural linguistic patterns of
other-initiated repair sequences in LSA. It also describes the quantitative distribution of other-initiated repair
formats based on a collection of 213 cases. It describes the multimodal components of open and restricted types
of repair initiators, and reports a previously undescribed implicit practice to initiate repair in LSA in comparison
to explicitly produced formats. Part of a special issue presenting repair systems across a range of languages, this
article contributes to a better understanding of the phenomenon of other-initiated repair in terms of visual and
gestural practices in human interaction in both signed and spoken languages.
A Coding Scheme for Other-initiated Repair
Across Languages
Authors: Dingemanse Mark , Kendrick Kobin H. , Enfield N. J.
Published: March 2016

We provide an annotated coding scheme for other-initiated repair, along with guidelines for
building collections and aggregating cases based on interactionally relevant similarities and differences.
The questions and categories of the scheme are grounded in inductive observations of conversational data
and connected to a rich body of work on other-initiated repair in conversation analysis. The scheme is
developed and tested in a 12-language comparative project and can serve as a stepping stone for future work
on other-initiated repair and the systematic comparative study of conversational structures.
Pointing and Self-reference in French and
French Sign Language
Authors: Morgenstern Aliyah , Caët Stéphanie , Limousin Fanny
Published: March 2016

The aim of this paper is to conduct an exploratory study and compare the development of pointing
and its specific use as self-reference in French sign language (LSF) with the development of pointing and self
reference in French. Personal reference is expressed through nominal expressions and pronouns in French.
In LSF, the signs used for personal reference have the same form as pointing gestures, which are present
in children’s communication system from the age of 10-11 months (Bates et. al 1977, Clark 1978). Continuity
between pointing gestures and signs is questioned by Bellugi & Klima (1981) and Petitto (1986), who
indicate that signing children’s pre-linguistic pointing gestures are different from signs and correspond to
two distinct categories: indexical and symbolic. We present arguments for a continuity hypothesis between
pointing gestures and signs. We coded two longitudinal datasets of a French-speaking child and a French
Sign Language signing child aged seven months to three years, filmed at home with their mothers once a
month. Our analyses enabled us to underline the continuity between the deaf child’s pointing gestures and
their incorporation as markers of personal reference into the child’s sign language system.
Compare Within and Between Groups: The Interpretation of Weak Generic Sentences
Authors: Xie Zhiguo
Published: March 2016

This paper explicates the precise meaning of weak generic sentences of the form Ks are P, best
represented by the Port Royal Puzzle sentence Dutchmen are good sailors. The sentence is true even though
the majority of Dutchmen do not know how to sail at all and a fortiori do not sail well. Two observations
motivate my analysis. One is that weak generic sentences express a property that “distinguishes the subject
referent from other entities that might belong to the same category” (Krifka et al. 1995). This leads to the use
of alternative set in my analysis. The other observation is that the scale structure of the predicate P affects
the availability of weak generic reading for sentences of the form Ks are P. I argue that the interpretation of
weak generic sentences involves: (i) partitioning the set of entities denoted by the bare plural subject based
on the property denoted by the predicate P; (ii) partitioning the set of entities alternative to the denotation
of the subject in a similar fashion; and (iii) comparing an appropriate partition in (i) to its counterpart in
(ii) with respect to the predicate P. The Port Royal Puzzle sentence is true if and only if: those Dutchmen
who can sail and who are good at sailing in comparison with the Dutch-internal standard of being good
at sailing and those international citizens who can sail and who are good at sailing in comparison to the
international standard of being good at sailing are such that the former population generally have better
sailing skills than the latter population.
Stress – an underestimated hazard in water sports
Authors: Remlein Małgorzata , Olszański Romuald , Siermontowski Piotr , Kobos Zdzisław , Buczyński Jacek , Buczyński Andrzej
Published: March 2016

Strong wind, low temperature, intense current and poor visibility under water are the most common stress inducing factors in individuals practising water sports. Stress is a state of agitation, which can be caused both by external and internal factors. Its objective is to mobilise one’s physical and psychological capabilities, thus it is a favourable reaction especially in crisis situations when such full mobilisation enables one to cope. Psychological stress is usually evoked by the occurrence of an atypical situation, exceeding one’s handling capacity. It can be induced by seeing real or imagined danger in the surroundings, as well as by external pressure related to a task interpreted as too difficult or exceeding one’s capabilities. Internal pressure appears when a person feels insecure in a given situation, when they cannot solve a problem or they feel discomfort due to their inability to meet the expectations of others, for instance, to perform a particular dive, or because of the money spent on this purpose or the invested time. Physical stress is usually an organism’s response to the environmental impacts. This article presents and discusses factors which have an effect on stress intensification, as well as providing a characterisation of selected psychological and medical theories of stress.
The effect of hyperbaric oxygen therapy on the nervous system. Systematic review
Authors: Kujawski Sławomir , Kujawska Agnieszka , Kozakiewicz Mariusz , Olszański Romuald , Siermontowski Piotr , Zalewski Paweł
Published: March 2016

Hyperbaric oxygen therapy (HBOT) is found among the interests of researchers who seek new methods of treatment of diseases of the nervous system. An increase of the partial pressure of oxygen in arterial blood within the appropriate range leads to numerous changes in the cells of the brain tissue. In this paper we analyse the results of selected articles describing HBOT used on pathologies of the nervous system such as stroke, autism, multiple sclerosis and cerebral palsy as well as in the course of research on animal models. The results are promising, although some studies struggled with numerous methodological problems and differences in the applied protocols, which resulted in conflicting results in individual interventions. In consequence, the need for further studies in randomised control trials and determination of the protocol by an international group of researchers dedicated to the use of HBOT was emphasised.
Analysis of the risk of diving accidents in military and recreational diving
Authors: Jóźwiak Dariusz , Siermontowski Piotr , DąbrowieckiI Zbigniew , Olszański Romuald
Published: March 2016

The most common question that arose in the course of the analysis of the data concerned with the number of diving accidents in recreational diving as compared with the authors’ own experiences working with military divers was why the number of accidents in recreational diving is substantially higher than that obtained in military diving. The comparison of factors having a direct effect on diving safety, the scope of depths reached, the manner of conducting decompression and divers’ problems reported after diving completion allow to explain the reasons behind the common incidents occurring among recreational divers. The factors which had a very significant impact on safety level included diving frequency, adaptation to higher pressure conditions and overestimation of one’s skills in undertaking challenges.
Effectiveness evaluation of sources of supply and systems filter in production process of breathing air
Authors: Woźniak Arkadiusz
Published: March 2016

The determination of how efficiently filtration systems used for the production of breathing air used in hyperbaric environments are operating is significant both from theoretical and practical points of view. The quality of breathing air and the breathing mixes based on air is crucial with regard to divers' safety. Paradoxically, a change in regulations regarding quality requirements for breathing mixes has imposed the necessity to verify both the technical equipment and laboratory procedures used in their production and verification. The following material, which is a continuation of previous publications, presents results of the conducted research along with the evaluation of effectiveness of the filtration systems used by the Polish Navy.
The effect of high pressures on the radiological image of the maxillary sinuses in divers
Authors: Klajman Stanisław , Dęga Kazimierz , Torbus Janusz , Wlazłowski Zbigniew
Published: March 2016

The study was performed on 38 divers of the navy. The research consisted in an analysis of RTG images of paranasal sinuses performed during control examinations. The authors compared sinus aeration in particular tests and calculated planimetric indices. It was concluded that an exposure to pressure fluctuations caused changes in the image and aeration of maxillary sinuses, which however did not have an effect on the diving capabilities of the tested group. Moreover, it was revealed that in a certain group of the subjects an exposure to hyperbaric conditions did not manifest any detectable lesions in maxillary sinuses.
Reworkable layered silicate-epoxy nanocomposites: synthesis, thermomechanical properties and combustion behaviour
Authors: Berta Marco , Maria Sébastien , Phan Trang N.T. , Gigmes Didier , Fina Alberto , Camino Giovanni
Published: March 2016

Epoxy resin/montmorillonite nanocomposites were obtained via in situ intercalative polymerisation. The polymer matrix consists of anhydride-cured epoxy, and the choice of catalyst allows exchange reactions without depolymerisation. This makes the resin insoluble and reprocessable at the same time and potentially recyclable. In this study, reprocessing of the nanocomposites was done by mechanical grinding and re-welding by compression moulding at high temperature, similarly to thermoplastics. The effect of this process on the level of clay dispersion is discussed. Nanocomposite superstructures were imaged by means of transmission electron microscopy, and montmorillonite interlayer spacings were estimated by small angle X-ray scattering. The thermomechanical and combustion properties of the nanocomposites were investigated by means of dynamic mechanical thermal analysis, thermogravimetric analysis and cone calorimetry. The material tensile complex modulus E* was improved by nanocomposite formation, also after the glass transition occurred. Flammability of the material was moderately affected by the dispersed clay.
Silver impregnated nanoparticles of titanium dioxide as carriers for 211At
Authors: Cedrowska Edyta , Łyczko Monika , Piotrowska Agata , Bilewicz Aleksander , Stolarz Anna , Trzcińska Agnieszka , Szkliniarz Katarzyna , Wąs Bogdan
Published: March 2016

The 211At radioisotope exhibits very attractive nuclear properties for application in radionuclide therapy. Unfortunately
use of 211At is limited, because astatine as the heaviest halogen forms weak bond with carbon atoms in the biomolecules
which makes 211At bioconjugates unstable in physiological conditions. In our work we propose a new solution for binding of
211At which consists of using nanoparticles of titanium dioxide modified with silver atoms as carriers for
211At. Ag+ cations have been absorbed on the nanometer-sized TiO2 particles (15 and 32 nm)
through ion exchange process and were reduced in Tollens' reaction. The obtained TiO2-Ag nanoparticles were labeled with
211At. It was found that labeling yields were almost quantitative under reducing conditions, while under oxidizing
conditions they dropped to about 80%. The labeled nanoparticles exhibited very high stability in physiological salt, PBS
buffer, solutions of peptides (0.001 M cysteine, 0.001 M glutathione) and in human blood serum. To make
TiO2/Ag nanoparticles well dispersed in water and biocompatible their surface was modified with a silane coupling
agent containing poly(ethyleneglycol) molecules. The developed functionalization approach will allow us to attach biomolecules to the
TiO2/Ag surface.
Co-extraction and co-stripping of U(VI) and Pu(IV) using tri-iso-amyl phosphate and tri-n-butyl phosphate in n-dodecane from
nitric acid media under high loading conditions
Authors: Sreenivasulu Balija , Suresh Ammath , Sivaraman Nagarajan , Vasudeva Rao P.R.
Published: March 2016

The extraction of Pu(IV) using 1.1 M solution of tri-iso-amyl phosphate (TiAP)/n-dodecane (DD) from plutonium
nitrate solutions in nitric acid media was examined as a function of equilibrium aqueous phase metal ion concentration and equilibrium
aqueous phase acidity at 303 K. The nitric acid concentration in the organic phase was measured as a function of equilibrium
organic phase plutonium concentration. The co-extraction of U(VI) and Pu(IV) was studied using 1.1 M TiAP/DD
system as a function of their equilibrium aqueous phase metal ion concentration and compared with 1.1 M tri-n-butyl
phosphate (TBP)/n-DD system under identical conditions. Co-extraction and co-stripping of U(VI) and Pu(IV) were studied
using 1.1 M TiAP/DD and 1.1 M TBP/DD systems in cross current mode to evaluate the number of stages required for
the extraction and stripping of heavy metal ions (uranium and plutonium). The extraction and stripping efficiencies were calculated for
both the systems. The saturation limit of the organic phase was also established in these studies.
Preparation and performance of 99Mo/99mTc chromatographic column generator based on zirconium molybdosilicate
Authors: Mostafa M. , Saber H. M. , El-Sadek A. A. , Nassar M. Y.
Published: March 2016

Zirconium molybdosilicate (ZrMoSi) gel prepared using 99Mo radiotracer via peroxo route was used as a base material
for 99Mo/99mTc column generator. The 99mTc elution yield and 99Mo
breakthrough in the eluate were studied as a function of the pH-value of gel precipitation, gel drying temperature and
Zr:Mo:Si molar ratio. Precipitation pH-value of 2, drying temperature of 100 ℃ and
Zr:Mo:Si molar ratio of 0.5:0.5:1 were found to be the optimum conditions achieving 99mTc
elution yield of 82% and 99Mo breakthrough of 1.0E-3%. The gel prepared with the optimum conditions was
characterized by BET surface area and pore size analyzer, IR spectroscopy, thermal analysis (TGA and DTA), XRD, XRF and
FESEM. Technetium-99m eluted from the optimum ZrMoSi 99Mo/99mTc generator was found to have
a high radiochemical purity (98% as 99mTcO4

–
) and chemical purity meeting criteria of clinical grade.
Hopf bifurcation in an overlapping generations resource economy with endogenous population growth rate
Authors: Fazlıoğlu Burcu , Sağlam Hüseyin Çağrı , Yüksel Mustafa Kerem
Published: March 2016

As scarce environmental resources necessarily put a constraint on population growth, we use more realistic population growth dynamics which contemplates a feedback mechanism between population growth rate and resource availability. We examine the local stability properties in overlapping generations resource economies which takes this feedback mechanism into account. The results indicate that Hopf bifurcation may arise without requiring logistic regeneration or unconventional constraints on parameter values. In particular, Hopf bifurcation is encountered under convex-concave dependence of carrying capacity on the resource availability.
The place of gold in the cross-market dependencies
Authors: Aboura Sofiane , Chevallier Julien , Jammazi Rania , Tiwari Aviral Kumar
Published: March 2016

This paper investigates the inter-relationships between the gold price on the one hand, other precious metals (e.g. silver, palladium, platinum) and asset markets (e.g. stocks, bonds, crude oil) on the other hand. The econometric methodology relies on the Markov-switching BEKK model by
Comparison of Fourier and normal angle descriptors for the content-based image retrieval
Authors: Hernández Mesa Pilar , Puente León Fernando
Published: March 2016

Appropriate methods are necessary to compare and search images automatically without using
tags. In this work the retrieval of similar objects in images using the shape information is
investigated. For this purpose, Fourier descriptors and the angles from the normal vectors
along the boundaries of the objects are used as shape descriptors. Three different features
are extracted from the Fourier descriptors to compare the objects. Three different distance
functions are proposed to measure the similarity between the objects when the angles of the
normal vectors are used as features. Finally, the appropriateness of these methods for the
content-based image retrieval is compared at a commonly used database to test such cases.
Experimentelle Untersuchung elastokalorischer Kühlprozesse
Authors: Schmidt Marvin , Schütze Andreas , Seelecke Stefan
Published: March 2016

Die im Rahmen dieser Arbeit durchgeführten Untersuchungen beinhalten
die Charakterisierung von Formgedächtnislegierungen hinsichtlich
ihrer elastokalorischen Eigenschaften sowie die Analyse des
Einflusses von Prozessführung und thermischen Randbedingungen auf
die Kühlleistung. Diese Untersuchungen wurden mit einer speziell
entwickelten wissenschaftlichen Testplattform durchgeführt, die es
ermöglicht, die Legierungen zu charakterisieren und in einem
Kühlprozess zu erforschen. Die Materialcharakterisierung umfasst
Zugversuche bei verschiedenen Dehnraten, wobei simultane Messungen
von Spannung und Dehnung sowie des Temperaturfeldes durchgeführt
werden. Basierend auf diesen Messungen lassen sich Aussagen über die
Ratenabhängigkeit und Homogenität des elastokalorischen Effektes
sowie die Effizienz des Kühlprozesses insgesamt treffen. Zusätzlich
kann die Langzeitstabilität der Materialien in Abhängigkeit von den
Prozessparametern und dem Materialtraining, d. h. dem
Einfahrprozess, untersucht werden. Basierend auf diesen
Untersuchungen erfolgt eine Variation der Prozessparameter unter
veränderlichen thermischen Randbedingungen. Die Parameterstudie
zeigt, dass eine von Wärmesenken- und Wärmequellentemperatur
abhängige Anpassung der Prozessführung zu einer Steigerung der
Kühlleistung führt.
Präzision und Sensorspezifikationen der wellenfrontbasierten Justage kleinaperturiger optischer Systeme
Authors: Krappig Reik , Schmitt Robert
Published: March 2016

Neben den anspruchsvollen Spezifikationen in der Fertigung einzelner optischer Komponenten wird
die Komplexität ganzer Systeme stark durch die Positionierung der Komponenten zueinander
beeinflusst. Diese Positionierung muss so exakt wie möglich sein, um eine optimale optische
Funktion des Gesamtsystems zu gewährleisten. Methoden der aktiven Justage bieten dazu einen
eleganten Ansatz, da durch die Erfassung der optischen Funktion Rückschlüsse auf den Systemzustand
gewonnen und geeignete Korrekturanweisungen berechnet werden können. Vorgestellt wird ein
erweiterter wellenfrontbasierter Ansatz zur aktiven und hochpräzisen Justage kleinformatiger
Komponenten am Beispiel eines einfachen Demonstratorsystems. Die simulierten Ergebnisse
illustrieren die erzielbare Präzision und erlauben einen wichtigen Blick auf die erforderlichen
Eigenschaften von Wellenfrontsensoren, damit derartige Werte auch in der Praxis erreicht werden
können.
Erweiterung des Raman-Nath-Modells zur Analyse von Schlierenabbildungen
Authors: Olfert Sergei , Henning Bernd
Published: March 2016

Die Schlierentechnik ist ein schnelles und nichtinvasives Verfahren zur Visualisierung von Schallfeldern in transparenten
Flüssigkeiten. Dabei wird die akustooptische Interaktion zwischen einer transmittierenden elektromagnetischen Welle und der akustischen
Welle ausgenutzt. Die Phase der ebenen EM-Welle wird beim Transmittieren durch die akustische Welle integral in Richtung der optischen
Achse moduliert und nach einer optischen Filterung auf einem Bildsensor abgebildet. In diesem Beitrag wird gezeigt, dass die
Orthogonalität der Schallwellen- und EM-Wellenfronten ein wichtiges Kriterium für die Abbildung der Schallwechseldruckverteilungen
ist.
Advance and case studies of the DAICOX framework for automated design of multi-sensor intelligent measurement systems
Authors: Thongpull Kittikhun , König Andreas
Published: March 2016

In this paper, we report on the advance and application of our DAICOX system conceived for
the automated and transparent design of integrated intelligent multi-sensor measurement
applications. The current implementation allows the front to back design from raw sensory
data to decision making. In particular, novelty or One-Class Classification (OCC) methods,
improved assessment functionality, and automated design of feature computation by
multi-objective optimization techniques to complete the processing chain complement the
system. Two representative applications, i. e., basic food analysis and magnetic
localization, have been selected as case studies with existing manual solutions to
demonstrate and assess the applicability of the conceived architecture and its
implementation. DAICOX reduced the design time by 98.62%, while increasing the
recognition rate by 5.21% in the first case study and 0.71% in the second
case study. The optimized solution can now be deployed to a run time system. In future work,
extension of the method portfolio, self-x functionality, and public-domain availability are
aspired.
Standardisierung eines schnellen drahtlosen Sensor/Aktor-Netzwerkes für die Fertigungsautomatisierung
Authors: Krush Dmytro , Cammin Christoph , Heynicke Ralf , Scholl Gerd
Published: March 2016

Drahtlose Kommunikationstechnologien konnten sich in den letzten Jahren auch im
industriellen Umfeld fest etablieren. Im Vergleich zu Standard-Büro-Anwendungen sind in der
Regel jedoch die Anforderungen bezüglich Robustheit, Koexistenzfähigkeit, Ausfallsicherheit
und Latenzzeiten deutlich höher . Gemäß VDI/VDE
2185 lassen sich die jeweiligen Automatisierungslösungen den Branchen
Logistik/Transport, Infrastrukturanlagen, Gebäudeautomatisierung sowie Fertigungs- und
Prozessautomatisierung zuordnen. In diesem Beitrag wird dargestellt, welche besondere
Herausforderungen im Bereich der Fertigungsautomatisierung an die
Sensor/Aktor-Kommunikation gestellt werden. Ferner wird eine mögliche Lösung vorgestellt,
die in Zusammenarbeit mit industriellen Partnern innerhalb der Profibus-Nutzerorganisation
entwickelt wurde und die sich momentan in der
Endphase des Standardisierungsprozesses befindet.
Anwendungsorientiertes Verfahren zur Eindeutigkeitsbereichserweiterung eines fasergekoppelten Zweiwellenlängen-Interferometers
Authors: Schake Markus , Lehmann Peter
Published: March 2016

Eine charakteristische Einschränkung phasenmessender Interferometer zur Messung von
Abstandsänderungen ist durch ihren auf eine halbe Lichtwellenlänge λ

i
begrenzten
Eindeutigkeitsbereich gegeben. Der Eindeutigkeitsbereich eines Laserinterferometers
vergrößert sich, wenn zwei Laserlichtquellen unterschiedlicher Wellenlänge λ
1 ≠ λ
2 eingesetzt werden und das Interferenzsignal der resultierenden synthetischen
Wellenlänge
Λ = λ
1 · λ
2/|λ
1 − λ
2|
ausgewertet wird. In diesem Beitrag wird ein Algorithmus zur Signalverarbeitung für
Zweiwellenlängeninterferometer vorgestellt, der basierend auf einem Ansatz von P. de Groot
den Eindeutigkeitsbereich über eine halbe synthetische Wellenlänge hinaus erweitert. Die
Funktionalität und Praxistauglichkeit des Algorithmus wird am Beispiel der Auswertung von
Messdaten eines fasergekoppelten, punktförmig messenden Zweiwellenlängeninterferometers mit
optischer Weglängenmodulation demonstriert.
From Parliamentarisation Towards Presidentialisation: Institutional Aspects of Local Political Leadership in Slovenia
Authors: Kukovič Simona , Brezovšek Marjan
Published: March 2016

In this paper, the authors analyse the institutional aspects of local governance. After the local government reforms, two main currents of change were created among European countries, namely the (quasi-) parliamentarisation administration systems committees, and (quasi-) presidentialisation through the form of elected mayors. Through an overview of the changes in the Slovenian local self-government in the last two decades, the authors determine a gradual transition from parliamentarism (with a relatively strong legislative body, municipal council) to the strengthening of the individual executive body (mayor), e.g. presidentialisation. By using the calculated index of mayoral strength, the authors conclude that according to the mayoral institutional power, the Slovenian system of local self-government is closer to the countries with (post) Napoleonic administrative tradition than to the countries of Central and Eastern Europe.