bluuebunny/crossref_metadata_2025 huggingface dataset:
Temperature Influence on Microstructure and Properties Evolution of Friction Stir Welded Al-Mg-Si Alloy
Authors: Naumov Anton , Morozova Iuliia , Isupov Fedor Y. , Golubev Iurii , Mikhailov Veselin
Published: September 2019

The temperature influence on the microstructure evolution and microhardness of the age-hardenable aluminium alloy 6082 T6 during friction stir welding was defined. In order to achieve this aim, the thermocycles calculated using the developed 3D Finite Element Model were physically simulated on the Gleeble-3800 in the points which located in the different zones of the weld. The microstructure in the chosen points after Gleeble testing was investigated as well as the microhardness was measured. The results were consequently compared with the relevant results obtained after friction stir welding. It was shown that the microstructure and microhardness profile are influenced not only by temperature but by deformation. The increase in hardness in different zones after FSW compared to Gleeble testing can be explained by the grain refinement in the nugget zone as well as the hardening precipitate distribution along the weld which can occur more rapidly due to the deformation influence.
Manufacturing and Properties of Radiation Resistance Aluminum Alloys and Composites with Addition of Gadolinium
Authors: Kosnikov G.A. , Kalmykov Alexander V. , Bespalov Eduard N.
Published: September 2019

In this work, the technology of Al-Gd alloys production has been developed, in which gadolinium is added as an alloying element during induction melting or in the composition of Gd2O3 disperse particles in the complex use of powder metallurgy and foundry technologies. The design of Vibration-jet agitator (VJA) and technology of its use for introduction of disperse particles into aluminum melts were developed. Aluminum alloys and dispersion-strengthened composites containing gadolinium have been obtained, their structure and neutron absorption properties has been studied.
Effect of High Energy Ball Milling Washing Process on Properties of Nd2Fe14B Particles Obtained by Reduction-Diffusion
Authors: Galkin Vitalii , Haider Kamran , Ahn Jong Bin , Kim Dong Soo
Published: September 2019

Nd2Fe14B particles were obtained from mixture of neodymium oxide, iron oxide, boric acid and CaH2 by reduction-diffusion process. Two different washing processes were used for the separation of magnetic particles from Ca and CaO matrix: usual washing with water and planetary ball milling process in ethanol media. Nd2Fe14BHx hydrogenated state was formed after usual washing with water. Ethanol planetary ball milling washing procedure prevented the formation of Nd2Fe14B hydrides during washing. Variation of milling parameters allowed producing particles with different morphology such as spherical or flakes after planetary ball milling washing process. Influence of milling parameters on magnetic properties of Nd2Fe14B powder was investigated.
Correlation of Nonuniformities of the Seebeck Coefficient’s Distribution and the Strain-Stress State in Extruded Thermoelectric Material
Authors: Rulimov Arseniy A. , Kuzavkova Daria D. , Nemov Sergey A. , Zolotov Alexandr Maksimovich
Published: September 2019

In this work, p-type thermoelectric material was produced by hot extrusion of pre-synthesized in injection molding machine Bi0.5Sb1.5Te3 solid solution. During the research radial distribution of the Seebeck coefficient was confirmed and described in material’s cross section using thermal measuring probe. Such nonuniformity of the Seebeck coefficient is correlated with the strain-stress state of extrudate specifically with the distribution of accumulated strain intensity, which was obtained by mathematical modeling of extrusion process using the software package DEFORM.
Effect of Processing and Radiation Exposure on the Structure and Properties of Polypropylene
Authors: Lisanevich M.S. , Galimzyanova Rezeda Yu. , Rakhmatullina Elvina P. , Khakimullin Yu.N. , Musin Ildar N. , Tsareva E.E.
Published: September 2019

While producing polymers as well as during their processing, a certain amount of stabilizers is introduced into the product, which should ensure polymer properties saving during processing and those of polymer products during storage and operation. However, in cases where medical products based on polypropylene are subjected to radiation sterilization, there are not enough stabilizers in it to save their characteristics during operation. In this regard, we made an assessment of the influence of processing conditions on the properties of polypropylene with a different set of stabilizers in the manufacture of products based on it, in order to assess the degree of influence of each technological operation, including the effects of ionizing radiation during sterilization. Processing and radiation exposure are shown to affect the properties of polypropylene. Nevertheless, the effect of ionizing radiation with an absorbed dose of 40-60 kGy exceeds the negative effect of thermo-oxidative breakdown greatly during the extrusion of PP. Polypropylene containing organophosphorus stabilizers (brand PP 1562R) is more susceptible to breakdown. This is indicated by low values of oxidation induction time, breakdown initial temperature, as well as high values of MFI after exposure to electron radiation. PP brand PP H350FF/1 whose stabilizing complex contains phenol-phosphite antioxidants is more resistant to breakdown during processing and sterilization. For both brands under study, it is apparently necessary to increase the content of stabilizing additives in order to save the properties at the level of the original unexposed material.
Research of Effect of the Powder Material Quality in the Structure Formation of the DLD Inconel 718 Samples
Authors: Silchonok S.S. , Zadykyan G.G. , Zotov Oleg G. , Morozova Iuliia N.
Published: September 2019

This article is devoted to Inconel 718 heat-resistant nickel alloy. Comparison of samples obtained by high-speed direct laser deposition technology of powders from different manufacturers on their structure and properties was carried out. The dependence of the influence of the chemical composition of the powders on the formation of defects in the studied samples was established
Effect of Inter-Layer Dwell Time on Distortion and Residual Stresses of Laser Metal Deposited Wall
Authors: Ivanov Sergei Yu. , Vildanov Artur , Golovin Pavel A. , Artinov Antoni , Karpov Ivan
Published: September 2019

The laser metal deposition is an advanced manufacturing technology enabling the production of large-sized parts and partially or completely elimination of machining and welding. The process is characterised by a non-uniform local heating of the buildup leading to a stress distribution, which may exceed the yield strength of the material and leads to loss of dimensional accuracy. The interlayer dwell time has a strong influence on the temperature field. The effect of the interlayer dwell time on the distortion and the stress distribution during laser metal deposition of a single-pass wall on the edge of 2 mm thick plate was studied experimentally and numerically. The deposited material was IN625 and the substrate material was AISI 316. A decrease of the residual displacement, due to a uniform shrinkage after the deposition of the last layer and a lower level of the residual compressive longitudinal plastic strain, has been observed in the studies without a dwell time. The peak increment of the free edge displacement corresponds to the first layer and hence the subsequent layers will be deposited on the already plastically deformed buildup. The tensile residual longitudinal stress near the top of the buildup and transverse stress near the edges of the buildup is higher than yield strength in the studies with dwell time.
Technological Principles of Internal Surfaces Finishing by Forced Electrolytic-Plasma Polishing
Authors: Radkevich Mihail Mihailovich , Kuzmichev Ivan Sergeevich
Published: September 2019

Technological difficulties of manufacture, typical to the large number of crucial elements of certain assemblies: tubes of fuel systems, details of waveguide devices, smooth gun barrels and other tubular details. Difficulties associated with the finishing of the internal surfaces of these products. Therefore, great interest is to find a finishing technology, which allow processing such products. The kind of electrolytic-plasma polishing technology - forced electrolytic-plasma polishing (FEPP) allows to receive homogenous quality of an internal surface layer along processed tubular work piece.
Technological Aspects of Obtaining Functional Gradient Coatings to Protect Machinery from Wear
Authors: Gerashchenkov Dmitry A. , Makarov A.M. , Bystrov Ruslan Y. , Bobkova T.O. , Belyakov A.N. , Bykova A.D. , Markov M.A. , Farmakovsky B.V.
Published: September 2019

The article presents the results of research on the development of technology for the production of functional-gradient coatings with high levels of adhesive strength and hardness, as well as with low porosity. The coating was successfully tested and recommended to protect the elements and components of precision engineering.
Determinants of cross-border mergers and acquisitions in the freight and logistics industry of South Africa
Authors: De Villiers Chantelle , Bezuidenhout Henri , Grater Sonja , Kleynhans Ewert P.J.
Published: September 2019

Orientation: The article reports on applied and practical research that focuses on the understanding of the motivation and actions of Multinational Enterprises in Africa as far as mergers and acquisitions (MAs) are concerned.Research purpose: This study examines developments in the freight and logistics industry through MAs in South Africa.Motivation for the study: It is necessary to gain a better understanding of MAs from a firm-level perspective in the South African context. Little research exists on the dynamics of MAs, and even less relating to the logistics industry that plays such a large role in trade in the region. This research adds substantial and significant original work to the scarce body of meaningful literature on foreign direct investment (FDI) in Africa.Research design, approach and method: This study used a case study approach employing structured interviews. The population was freight and logistics companies that were involved in MA activities in South Africa. Quantitative data and other information from various databases, published MA data and financial statements were analysed to obtain background views of the companies’ where after, three companies were eventually selected. Direct unstructured interviews were then conducted with the main decision makers and a qualitative thematic analysis of the companies’ responses. Related themes and patterns were identified through the frequency of occurrence, similarities, differences and general patterns observed. This method yielded the most insight into the processes and company dynamics involved.Main findings: International MAs in the freight and logistics industry provide companies with international scale and effectively link to international markets. Companies benefit from expanded market opportunities across national borders, which generate substantial revenues, geographical growth and business expansion. It renders synergy and additional competitive advantage.Practical/managerial implications: Theoretical and practical aspects of FDI, such as motives for market entry, ownership, location and entry barriers within the context of multinational enterprises, globally, were investigated. Little data exist on the freight and logistics industry in Africa and also on MAs, which presented limitations. Companies are inexperienced and need to involve more expertise in MA processes. The results also found that South African companies need to expand their cultural intelligence and negotiation skills, especially within a diverse cultural realm, before entering into MA deals with foreign companies.Contribution/value-add: Services are determinants of trade volumes and offer distributional effects and patterns of economic growth, development and FDI inflows. Little research exists on the dynamics of MAs in the freight and logistics industry, especially within the African context. This study also makes some contribution in that regard.
A Clinicoepidemiological Study of Pediatric Cutaneous Leishmaniasis in Sinjar Province, Iraq
Authors: Hussein Nawfal R.
Published: September 2019

Cutaneous leishmaniasis (CL) is a major health problem worldwide. Although CL is a common disease among children, treatment regimens for the pediatric age group are based on extrapolation of efficacy data in adults. The present study aimed to evaluate the treatment outcome of CL in preschool-age children and the factors influencing the outcome. Two hundred ninety-four children were diagnosed with CL between December 2018 and March 2019 in Sinjar Province, Iraq. All patients were treated with intralesional injections of sodium stibogluconate and followed up for 3 months after the completion of treatment. The treatment success rate was 99% (291/294). A statistically significant association was found between the number of doses per lesion and the number of lesions (P = 0.002; CI = 0.066–0.2875). No association was found between the number of lesions, age, gender, or the presence of livestock and the treatment outcome. In conclusion, treatment success rate was high with the use of intralesional injection of sodium stibogluconate. A significant association was found between the number of lesions and the number of doses. Further studies are required to assess the treatment outcome indicators, including the genotype of leishmania.
Threats to Reliability and Validity With Resident Wellness Surveying Efforts
Authors: Appelbaum Nital P. , Santen Sally A. , Vota Scott , Wingfield Lauren , Sabo Roy , Yaghmour Nicholas
Published: September 2019

Background

Residency programs and the Accreditation Council for Graduate Medical Education (ACGME) use survey data for the purpose of program evaluation. A priority for many programs is to improve resident wellness, often relying on self-reported surveys to drive interventions.

Objective

We tested for result differences on wellness surveys collected through varying survey methodology and identified potential causes for differences.

Methods

Aggregated results on the resident wellness scale for a single institution were compared when collected electronically through the ACGME Resident Survey immediately following the program evaluation survey for accreditation purposes and anonymously through an internal survey aimed at program improvement.

Results

Across 18 residency programs, 293 of 404 (73%) residents responded to the internal survey, and 383 of 398 residents (96%) responded to the 2018 ACGME survey. There was a significant difference (P < .001, Cohen's d = 1.22) between the composite wellness score from our internal survey (3.69 ± 0.34) compared to its measurement through the ACGME (4.08 ± 0.30), indicating reports of more positive wellness on the national accreditation survey. ACGME results were also statistically more favorable for all 10 individual scale items compared to the internal results.

Conclusions

Potential causes for differences in wellness scores between internal and ACGME collected surveys include poor test-retest reliability, nonresponse bias, coaching responses, social desirability bias, different modes for data collection, and differences in survey response options. Triangulation of data through multiple methodologies and tools may be one approach to accurately gauge resident wellness.
Technical Note: Suppression of Anodic Kinetics of Stainless Steels During Biofilm Development in Natural Seawater
Authors: Eashwar M. , Lakshman Kumar A. , Sreedhar G. , Vengatesan S. , Ananth R. , Prabu V.
Published: September 2019

The anodic kinetics of three stainless steels, viz. UNS S31600, S44660, and N08367, in gently flowing natural seawater was investigated. Potentiodynamic anodic polarization showed two distinct passive regimes emerging with biofilm development. A dramatic decrease of anodic current densities (p < 10−4) was recorded in the lower passive region near the ennobled open-circuit potential, accompanied by an increase of the breakdown potential by over 0.2 V for Alloy S31600. However, significant broadening of the transpassive region was observed on all the three alloys tested. Further, for Alloys S44660 and N08367, the second passive region was altered during biofilm growth, which resulted in enhanced peak current densities. These seemingly undesired effects, nonetheless, were detected far beyond the domain of practical significance. Potentiostatic current-time curves for Alloy N08367 further confirmed the suppression of anodic kinetics in the lower passive region. Evans diagrams constructed from actual polarization curves provided fundamentally important insights that passivity promotion can be independent of microbially enhanced cathodic kinetics.
Effect of Aerodynamic Configuration Parameters on Lateral-Directional Stability of Double-Swept Flying Wing Aircraft
Authors: Pan Ya Lin , Huang Jun
Published: September 2019

Poor lateral-directional stability due to the absence of vertical stabilizer is a great risk to the aircraft with flying wing layout. In this paper, an unmanned aerial vehicle with this kind of configuration is chosen as the research object. A three-dimensional model of the unmanned aerial vehicle is established, and then the sensitivity analysis is performed to obtain the effects of main aerodynamic shape parameters on lateral-directional flying quality. The results show that the roll mode and spiral mode of the aircraft meet the requirements of Level 1 flying quality in MIL-F-8785C. But the Dutch roll mode is generally divergent, which means that the flying quality of the aircraft is unacceptable. Thus it can be seen that the Dutch roll mode is the key to the dynamic stability of the aircraft. Further studies show that increasing the value of wing aspect ratio or decreasing the values of dihedral angle and torsion angle are useful for improving the Dutch roll mode. It is valuable to reveal the influence mechanism of aerodynamic shape parameters on lateral-directional flying quality for the design of flying wing aircraft.
Sea Spray Fluxes from the Southwest Coast of the United Kingdom – Dependence on Wind Speed and Wave Height
Authors: Yang Mingxi , Norris Sarah J. , Bell Thomas G. , Brooks Ian M.
Published: September 2019

Abstract. Fluxes of sea spray aerosols were measured with the eddy covariance technique from the Penlee Point Atmospheric Observatory (PPAO) on the southwest coast of the United Kingdom over several months from 2015 to 2017. Two different fast-responding aerosol instruments were employed: an ultra-fine condensation particle counter (CPC) that detects aerosols with radius above ca. 1.5 nm, and a compact lightweight aerosol spectrometer probe (CLASP) that provides a size distribution between ca. 0.1 and 6 μm. The aerosol fluxes were almost always from sea to air, indicating sea spray emission. Fluxes from the CPC and from the CLASP (integrated over all sizes) were generally comparable, implying a reasonable closure in the aerosol number flux. Compared to most previous observations over the open ocean, at the same wind speed the mean sea spray number fluxes at PPAO are much greater. Significant wave height and wave Reynolds number explain more variability in sea spray fluxes than does wind speed, implying that enhanced wave breaking resulting from shoaling in shallow coastal waters is a dominant control on sea spray emission. Comparisons between two different wind sectors (open water vs. fetch-limited Plymouth Sound) and between two sets of sea states (growing vs. falling seas) further confirm the importance of wave characteristics on sea spray fluxes. These results suggest that spatial variability in wave characteristics need to be taken into account in predictions of coastal sea spray productions and also aerosol loading.
Addition of fast gas chromatography to selected ion flow tube mass spectrometry for analysis of individual monoterpenes in mixtures
Authors: Lacko Michal , Wang Nijing , Sovová Kristýna , Pásztor Pavel , Španěl Patrik
Published: September 2019

Abstract. Soft chemical ionization mass spectrometry (SCI-MS)
techniques can be used to accurately quantify volatile organic compounds
(VOCs) in air in real time; however, differentiation of isomers still
represents a challenge. A suitable pre-separation technique is thus needed,
ideally capable of analyses over a few tens of seconds. To this end, a bespoke
fast gas chromatography (GC) instrument with an electrically heated 5 m long metallic capillary column was
coupled to selected ion flow tube mass spectrometry (SIFT-MS) measurements. To assess the
performance of this combination, a case study of monoterpene isomer
(C10H16) analyses was carried out. The monoterpenes were
quantified by SIFT-MS using H3O+ reagent ions (analyte ions
C10H17+, m∕z 137, and C6H9+, m∕z 81) and NO+
reagent ions (analyte ions C10H16+, m∕z 136, and
C7H9+, m∕z 93). The combinations of the fragment ion relative
intensities obtained using H3O+ and NO+ were shown to be
characteristic of the individual monoterpenes. Two non-polar GC columns
(Restek Inc.) were tested: the advantage of MXT-1 was shorter retention,
whilst the advantage of MXT-Volatiles was better separation. Thus, it is
possible to identify components of a monoterpene mixture in less than 45 s
using the MXT-1 column and to separate them in less than 180 s using the
MXT-Volatiles column. Quality of the separation and the sensitivity of present
technique (limit of detection, LOD, ∼16 ppbv) was found to be inferior compared to
commercially available fast GC solutions coupled with proton transfer
reaction mass spectrometry (PTR-MS, LOD ∼1 ppbv) due to the limited
sample flow through the column. However, using combinations of two reagent
ions improved identification of monoterpenes not well resolved by the
chromatograms. As an illustrative example, the headspace of needle samples
of three conifer species was analysed by both reagent ions and with both
columns showing that mainly α-pinene, β-pinene and 3-carene
were present. The system can thus be used for direct rapid monitoring of
monoterpenes above 20 ppbv, such as applications in laboratory studies of
monoterpene standards and leaf headspace analysis. Limitation of the
sensitivity due to the total sample flow can be improved using a multi-column
pre-separation.
Estimation of coarse dead wood stocks in intact and degraded forests in the Brazilian Amazon using airborne lidar
Authors: Scaranello Marcos A. S. , Keller Michael , Longo Marcos , dos-Santos Maiza N. , Leitold Veronika , Morton Douglas C. , Pinagé Ekena R. , Espírito-Santo Fernando Del Bon
Published: September 2019

Abstract. Coarse dead wood is an important component of forest
carbon stocks, but it is rarely measured in Amazon forests and is typically
excluded from regional forest carbon budgets. Our study is based on line
intercept sampling for fallen coarse dead wood conducted along 103 transects
with a total length of 48 km matched with forest inventory plots where
standing coarse dead wood was measured in the footprints of larger areas of
airborne lidar acquisitions. We developed models to relate lidar metrics and
Landsat time series variables to coarse dead wood stocks for intact, logged,
burned, or logged and burned forests. Canopy characteristics such as gap
area produced significant individual relations for logged forests. For total
fallen plus standing coarse dead wood (hereafter defined as total coarse
dead wood), the relative root mean square error for models with only lidar
metrics ranged from 33 % in logged forest to up to 36 % in burned
forests. The addition of historical information improved model performance
slightly for intact forests (31 % against 35 % relative root mean square
error), not justifying the use of a number of disturbance events from
historical satellite images (Landsat) with airborne lidar data.
Lidar-derived estimates of total coarse dead wood compared favorably with
independent ground-based sampling for areas up to several hundred hectares.
The relations found between total coarse dead wood and variables quantifying
forest structure derived from airborne lidar highlight the opportunity to
quantify this important but rarely measured component of forest carbon over
large areas in tropical forests.
Water restrictions under climate change: a Rhône–Mediterranean perspective combining bottom-up and top-down approaches
Authors: Sauquet Eric , Richard Bastien , Devers Alexandre , Prudhomme Christel
Published: September 2019

Abstract. Drought management plans (DMPs) require an overview of future
climate conditions for ensuring long-term relevance of existing
decision-making processes. To that end, impact studies are expected to best
reproduce decision-making needs linked with catchment intrinsic sensitivity
to climate change. The objective of this study is to apply a risk-based
approach through sensitivity, exposure and performance assessments to
identify where and when, due to climate change, access to surface water
constrained by legally binding water restrictions (WRs) may question agricultural
activities. After inspection of legally binding WRs from the DMPs in the Rhône–Mediterranean (RM) district, a framework to derive WR durations was developed based on harmonized low-flow indicators. Whilst the framework could not perfectly reproduce all WR ordered by state services, as deviations from sociopolitical factors could not be included, it enabled the identification of most WRs under the current baseline and the quantification of the sensitivity of WR duration to a wide range of perturbed climates for 106 catchments. Four classes of responses were found across the RM district. The information provided by the national system of compensation to farmers during the 2011 drought was used to define a critical threshold of acceptable WR that is related to the current activities over the RM district. The study finally concluded that catchments in mountainous areas, highly sensitive to temperature changes, are also the most predisposed to future restrictions under projected climate changes considering current DMPs, whilst catchments around the Mediterranean Sea were found to be mainly sensitive to precipitation changes and irrigation use was less vulnerable to projected climatic changes. The tools developed enable a rapid assessment of the effectiveness of current DMPs under climate change and can be used to prioritize review of the plans for those most vulnerable basins.
Numerical modeling and dynamic characteristics study of coupling vibration of multistage face gearsplanetary transmission
Authors: Chen Xingbin , Hu Qingchun , Xu Zhongyang , Zhu Chune
Published: September 2019

Abstract. A novel transmission with multistage face gears as the core
component achieves variable speeds via differential gear shifting.
Single/multistage coupled vibration models have been established in this
study to derive the coupled vibration equation in order to accurately solve
the load distribution between the meshing teeth and the vibration shock
between the shifting stages in the transmission process, improve the
transmission smoothness of the face gears during the shifting processing,
suppress the resonance of face gears meshing, reduce the noise, and optimize
the power transmission performance. The characterization relationships of
the key parameters such as equivalent mass, rotational inertia, equivalent
mesh stiffness, support stiffness, and meshing damping coefficient to
dynamic characteristics were investigated. The linear and nonlinear dynamic
characteristics of coupled vibration differential equations were solved. The
influence rules of factors such as integrated transmission error, dynamic
load, tooth surface friction, loading speed, and load on the transmission
system were analyzed. The results of the study provide a theoretical basis
for the expansion of field of application of transmission devices.
Multicriteria assessment framework of flood events simulated with vertically mixed runoff model in semiarid catchments in the middle Yellow River
Authors: Li Dayang , Liang Zhongmin , Zhou Yan , Li Binquan , Fu Yupeng
Published: September 2019

Abstract. Flood forecasting in semiarid regions is always poor, and a single-criterion assessment provides limited information for decision making. Here,
we propose a multicriteria assessment framework called flood
classification–reliability assessment (FCRA) that combines the absolute
relative error, flow classification and uncertainty interval estimated by
the hydrologic uncertainty processor (HUP) to assess the most striking
feature of an event-based flood: the peak flow. A total of 100 flood events in
four catchments of the middle reaches of the Yellow River are modeled with
hydrological models over the period of 1983–2009. The vertically mixed
runoff model (VMM) is compared with one physically based model, the MIKE SHE
model (originating from the Système Hydrologique Européen program),
and two conceptual models, the Xinanjiang model (XAJ) and the Shanbei model (SBM). Our results show that the VMM has a better flood estimation performance than the other models, and the FCRA framework can provide reasonable flood classification and reliability assessment information, which may help decision makers improve their diagnostic abilities in the early flood warning process.
Extratropical cyclone induced sea surface temperature anomalies in
the 2013/14 winter
Authors: Dacre Helen F. , Josey Simon A. , Grant Alan L. M.
Published: September 2019

Abstract. The 2013/14 winter averaged sea surface temperature (SST) was anomalously cool in the mid-North Atlantic region. This season was also unusually stormy with extratropical cyclones passing over the mid-North Atlantic every 3 days. However, the processes by which cyclones contribute towards seasonal SST anomalies are not fully understood. In this paper a cyclone identification and tracking method is combined with ECMWF atmosphere and ocean reanalysis fields to calculate cyclone-relative net surface heat flux anomalies and resulting SST changes. Anomalously large negative heat fluxes are located behind the cyclones cold front resulting in anomalous cooling up to 0.2 K/day when the cyclones are at maximum intensity. This extratropical cyclone induced cold wake extends along the cyclones cold front but is small compared to climatological variability. To investigate the potential cumulative effect of the passage of multiple cyclone induced SST cooling in the same location we calculate Earth-relative net surface heat flux anomalies and resulting SST changes for the 2013/2014 winter period. Anomalously large winter averaged negative heat fluxes occur in a zonally orientated band extending across the North Atlantic between 40–60° N. The anomaly associated with cyclones is estimated using a cyclone masking technique which encompasses each cyclone centre and its trailing cold front. North Atlantic extratropical cyclones in the 2013/14 winter season account for 78 % of the observed net surface heat flux in the mid- North Atlantic and net surface heat fluxes in the 2013/14 winter season account for 70 % of the observed cooling in the mid-North Atlantic. Thus extratropical cyclones play a major role in determining the extreme 2013/2014 winter season SST cooling.
A Comunicação sob o olhar de Boaventura de Sousa Santos
Authors: Loose Eloisa Beling
Published: September 2019

O sociólogo português Boaventura de Sousa Santos já é bastante conhecido no Brasil não apenas por sua produção acadêmica (que é vasta), mas pelo envolvimento que tem com os movimentos sociais e as lutas pelos direitos humanos. Com diferentes laços com nosso País, desde a década de 1970, quando morou no Rio de Janeiro, Sousa Santos frequentemente se faz presente nos debates políticos e nas reflexões universitárias, especialmente nas áreas da Saúde, Direito e Sociologia. Seu trabalho abarca, dentre outras questões, a discussão da necessidade de reconhecermos outros saberes, que foram silenciados e oprimidos pelo colonialismo, patriarcado e capitalismo. Atualmente, o catedrático aposentado da Faculdade de Economia da Universidade de Coimbra, Portugal, e professor emérito da Faculdade de Direito da Universidade de Wisconsin, Estados Unidos, dirige o Centro de Estudos Sociais (CES), do qual é fundador, e coordena o projeto de investigação ALICE - Espelhos estranhos, lições imprevistas: definindo para a Europa um novo modo de partilhar as experiências o mundo, financiado pelo Conselho Europeu de Investigação, um dos mais prestigiados e competitivos financiamentos de pesquisas internacionais. Nesta entrevista, concedida durante a IV ALICE Summer School, dedicada à compreensão e vivência das epistemologias do Sul, Sousa Santos explana sobre como a Comunicação pode ser entendida a partir de sua teoria.
SENSAÇÃO TÉRMICA EM DIFERENTES CENÁRIOS URBANOS DE CUIABÁ-MT
Authors: Ribeiro Karyn Ferreira Antunes , Valin Jr Marcos De Oliveira , Santos Flávia Maria De Moura , De Musis Carlo Ralph , Almeida Júnior Elio Santos , Marques João Basso , Nogueira Marta Cristina De Jesus Albuquerque
Published: September 2019

Em ambientes abertos como praças e parques as diferentes condições térmicas influenciam diretamente na organização e ocupação do espaço urbano e no nível de conforto dos usuários. O objetivo deste estudo foi analisar a sensação térmica em três diferentes cenários urbanos na cidade de Cuiabá-MT, com levantamento de dados meteorológicos e aplicação de questionários para verificar a preferência e percepção térmica nos cenários: sombreamento arbóreo (C1), sombreamento artificial com guarda-sol (C2) e exposto ao sol (C3). Os resultados mostram que as médias das variáveis meteorológicas, temperatura do ar (Ta) e temperatura média radiante (Trm) apresentaram diferenças significativas nos cenários. Ao realizar o cruzamento das respostas de percepção e preferência térmica nos diferentes cenários verificou-se que no C1 ocorreu a maior porcentagem de conforto térmico (77,2%) aos participantes, no C2 em 31% e no C3 ocorreu a menor porcentagem de conforto térmico (5%), logo sendo o cenário com maior desconforto térmico (95%). Portanto, fica explícito de quanto os indivíduos de áreas ao ar livre em Cuiabá-MT se sentem desconfortáveis termicamente, com isso este estudo corrobora com a importância e a influência do sombreamento arbóreo ou artificial nesses ambientes, que contribuem no conforto térmico e proporciona bem-estar aos pedestres.
“EIS QUE (QUASE) TUDO SE FEZ NOVO”: O CARISMATISMO CATÓLICO E AS RESSIGNIFICAÇÕES DA TRADIÇÃO NO EVENTO CRISTO É NOSSO SHOW
Authors: Anjos Brandon Lopes dos , Nascimento Lara Pazinato , Mezzomo Frank Antonio , Pátaro Cristina Satiê de Oliveira
Published: September 2019

Objetivamos analisar as ressignificações da tradição católica no evento Cristo é Nosso Show, realizado em Campo Mourão, Paraná, que tem como elemento marcante as celebrações carismáticas. A festa, que ocorre no município anualmente desde 2003, é considerada a principal festividade da Diocese de Campo Mourão, e conta em sua programação com shows e pregações realizadas por personalidades reconhecidas no meio gospel. Os procedimentos metodológicos empregados nesta pesquisa envolveram trabalho de campo durante a 15ª edição do evento, realizada em novembro de 2017, para observação da configuração da festa e coleta de entrevistas com os participantes. Com base no material levantado foi possível observar como os fiéis se sentem atraídos pelas formas de adoração, com pregações e louvores de caráter emocional, em uma confluência e ressignificação entre elementos tradicionais e contemporâneos. A partir das falas dos entrevistados, notamos como a celebração carismática é compreendida como uma forma alternativa às missas habituais, sem deixar de lado o respeito e apreço pela liturgia. A combinação entre o tradicional e o renovado trazida pelo evento Cristo é Nosso Show demonstra uma ressignificação da tradição católica que é expressada em uma linguagem atualizada, funcionando de modo a oferecer novas formas de engajamento aos fiéis, bem como atrair novos seguidores.
IDENTIDADE CULTURAL NA PÓS-MODERNIDADE E A RELIGIOSIDADE DOS ASSISTENTES SOCIAIS
Authors: Silva Claudia Neves da , Dutra Patrícia Vicente
Published: September 2019

O presente texto busca, de forma sucinta, tratar sobre os aspectos relacionados à compreensão do fenômeno religioso no interior do Serviço Social brasileiro, especificamente sobre a religiosidade de assistentes sociais, tendo como ponto de partida os estudos de Stuart Hall sobre identidade e pós-modernidade, além das demais referências obtidas com a pesquisa sobre o tema. Será possível observar que, obviamente de forma não exclusiva, partícipes de uma sociedade que emprega entre suas características a dificuldade de seus indivíduos em construir e estabelecer de forma clara sua própria identidade, os profissionais de Serviço Social apresentam suas identificações religiosas e por vezes utilizam de sua fé como um recurso à prática profissional.
A Case Study of Mindful Leadership in an Ability to Develop Focus, Clarity, and Creativity of the Leader of Buddhist Higher Education Institute
Authors: Burmansah Burmansah , Rugaiyah Rugaiyah , Mukhtar Mukhneri
Published: September 2019

This research is a single case study using a qualitative approach that produces descriptive data consisting of written or oral words resulted from interviews and observation. The research was carried out at Buddhist Higher Education Institute, the Institute of Advanced Buddhist Studies – Plum Village Buddhist Monastery Upper Hamlet of France. The research procedures used in this case study consist of six steps of case study research by Robert K. Yin. The research data collection was obtained by purposive sampling and snowball sampling. Data analysis techniques are used through pattern matching, explanation making, and analyzing data time series. This research found that mindful leadership can develop concentration and be more focused and have clarity. Clarity within the leader can bring up conditions of calm and peace that give a significant effect on how to respond to an existing condition. By being calm, then the leader has clarity and creativity. This situation helps the leader to recognize what is happening and helps further to decide what to do. This decision helps leadership in responding to the situation. Mindful leadership focuses on actions and internal circumstances, not on intellectual quality. The development of the leaders’ internal state is related to the behavior and emotional state of each of them. Leadership that provides democratic qualities in the delivery of opinions and decision-making processes both personally and collectively strengthen the effectiveness of his leadership, and develop essential behaviors related to emotional and social intelligence.
Nutrient Dynamics of an Aquaponic System in Southern Thailand
Authors: Maneepong Somsak
Published: September 2019

Aquaponics is an integrated system of recirculation aquaculture and soilless culture that mainly aims to reduce water requirements, reduce waste discharge and maximize nutrient use. In the present study, an aquaponic system consisting of a 500 L fish tank, sedimentation and pH control tank, degassing tank and three vegetable growing beds was assembled and tested for 17 weeks. Fifty Nile tilapias (Oreochromis niloticus) were reared and fed thrice daily with a complete diet containing 32% protein. Buffer of solid rocks (dead corals) were installed for pH control. Water convolvulus (Ipomoea aquatica) and Tokyo Bekana (Brassica rapa) were rotationally grown at different growth stages. Water samples were collected once a week to analyze pH and NH3/NH4+, NO3-, H2PO4-/HPO42-, SO42-, K, Na, Ca, Mg and Fe concentrations. Fish weight increased from 50 g/fish at the beginning of the experiment to 228 g/fish after 15 weeks. Water pH increased from 6.0 before rearing to 7.0 on the 4th week and varied over the range of 6.9 to 7.0 until the end of the experiment without any additional acid or alkali. Total NH3/NH4+ increased to 10.2 mg-N/L on the 2nd week and rapidly declined to levels below 2.0 mg-N/L. Phosphate, SO42-, Na and Mg accumulated in the system, whereas Ca gradually increased and reached equilibrium at 47±2 mg/L. K and NO2-/NO3- varied considerably at concentrations lower than the general requirement of the vegetables. The first crops of vegetables initially grew well, but growth rates declined remarkably and latter crops showed complex nutrient deficiency. The system could be maintained for 17 weeks without waste discharge.
Determinants of Participation Decision in Cassava Marketing by Smallholder Farmers in Taita-Taveta and Kilifi Counties, Kenya
Authors: Tirra Amos Nyangira , Oluoch-Kosura Willis , Nyanganga Hillary , Mwang’ombe Agnes W.
Published: September 2019

Cassava is an important food crop with high production potential in different agroecological zones across the world. Cassava is also a drought tolerant crop performing well in arid and semi-arid areas. Cassava has a great potential as both a food security and industrial crop. In addition, as a drought tolerant crop, it is fits very well as a climate smart crop in the face of climate change. However, the cassava industry and value chain in Kenya is still underdeveloped and therefore there are many cassava marketing opportunities that are yet to be exploited. This study analyses factors that influence smallholder farmers’ decision to participate in cassava marketing in Taita-Taveta and Kilifi Counties in Kenya. Data was collected using semi-structured questionnaires from a sample of 250 smallholder cassava farmers. Descriptive statistics were used to analyse the socio-economic characteristics of respondents while a binary Probit model was used to analyse the socio-economic factors that influence farmers’ participation decision in cassava marketing. The results of the binary Probit model show that, sex of the head of a household, access to extension services, price of cassava products and quantity harvested had a positive and significant influence on market participation decision while years of schooling, household size and farm size had a negative and significant influence on the market participation decision. Therefore, based on the findings, the study recommended policy interventions targeting organization and coordination of the cassava marketing system and provision of appropriate incentives to farmers to enhance market participation.
Is the presence of simple or glandular hairs a good trait for distinguishing species in Caryophyllaceae? A case study of Arenaria serpyllifolia sensu lato in southern Poland
Authors: Rola Kaja , Jędrzejczak Elżbieta , Zalewska-Gałosz Joanna , Nobis Marcin
Published: September 2019

The presence of different types of indumentum is regarded as a valuable taxonomic trait for describing and differentiating between species in many different families and genera. In Caryophyllaceae, however, this character is sometimes a subject of discussion and scientific conflicts. For instance, within Arenaria serpyllifolia sensu lato (s. l.), two or three taxa have been distinguished based on the presence or absence of glandular and/or eglandular hairs on the calyx and uppermost leaves, namely A. serpyllifolia, A. viscida, and A. serpyllifolia var. intermedia. The most common, based on material from Poland, is the glandular morphotype of Arenaria serpyllifolia s. l. (315 specimens), which is in contrast to the eglandular and intermediate morphotypes represented by 174 and 24 specimens, respectively; however, the ranges of distribution of these morphotypes fully overlap. Based on our macro- and micromorphological examination of specimens belonging to the group, as well as numerical and molecular studies, we conclude that the occurrence and abundance of eglandular and glandular hairs may vary in particular parts of specimens of Arenaria serpyllifolia s. l., i.e., on their calyces, bracts, and uppermost and middle cauline leaves. The width of the capsule was the only character for which significant differences between the SERP and VIS morphotypes were found; however, considering all studied morphotypes together, the capsule characters overlap considerably. Moreover, morphological variation expressed by different types of indumenta is not paralleled by internal transcribed spacer (ITS) polymorphism patterns. The probable lack of genetic barriers between populations of individuals with glandular or eglandular hairs supports the hypothesis that the type of indumentum is of minor taxonomic importance. However, it is possible that we are dealing with sampling in the hybrid zones of both taxa, and that individuals demonstrating morphological traits typical of both taxa (eglandular and glandular) do not in fact represent pure taxa but only different kinds of hybrids, backcrosses, or introgressive forms.
A Physics Based Novel Approach for Travelling Tournament Problem: Optics Inspired Optimization
Authors: Alatas Bilal , Bingol Harun
Published: September 2019

Computational intelligence search and optimization algorithms have been efficiently adopted and used for many types of complex problems. Optics Inspired Optimization (OIO) is one of the most recent physics inspired computational intelligence methods which treats the search space of the problem to be optimized as a wavy mirror in which each peak is assumed to reflect as a convex mirror and each valley to reflect as a concave one. Each candidate solution is treated as an artificial light point that its glittered ray is reflected back by the search space of the problem and the artificial image is formed based on mirror equations adopted from Optics, as a new candidate solution. In this study, OIO for the first time has been designed as solution search strategy for travelling tournament problem which is one of the current sports problems and aids to minimize transportation and total movement of teams. Furthermore, this problem has been firstly solved by League Championship Algorithm and obtained results from both synthetic and real datasets have been compared in this study for the first time. Obtained results show the superiority of OIO which is a novel algorithm and seems to efficiently solve many complex problems.
Energy performance of parallel sort algorithms
Authors: Marszalek Zbigniew
Published: September 2019

This article shows the energy consumption analysis by parallel sorting algorithms. Sort algorithms are used in information systems and databases, to select and organize the information. The tests carried out confirm the reduction of energy consumption by using parallel sorting algorithms.
A Turning Point in Oxford Idealism
Authors: Grier Philip T. ,   Hegel Society of America
Published: September 2019

As a young Victoria Scholar from South Africa studying at Oxford from 1931–33, Errol Harris encountered most of the prominent representatives of “Oxford Idealism” there. He discovered that, predominantly under the influence of Bradley, they were uniformly convinced that Hegel’s Naturphilosophie was a superfluous “addition” to his system, accomplishing nothing not already provided by the Science of Logic, and that, moreover, to treat Nature as a reality (as opposed to an appearance) would introduce a fundamental contradiction into Hegel’s thought. In this general attitude they were strongly supported by the Italian “neo-Idealists” with whom they were closely engaged. In work accomplished during those two years, Harris laid the foundations for a thorough reversal of this attitude, arguing that in the absence of a philosophy of nature Hegel’s system could be neither coherent nor complete. On this basis Harris would eventually succeed in constructing the outlines of a complete cosmology grounded in twentieth-century physical theory.