bluuebunny/crossref_metadata_2025 huggingface dataset:
Fatigue Lifetime of Ceramic Matrix Composites at Intermediate Temperature by Acoustic Emission
Authors: Racle Elie , Godin Nathalie , Reynaud Pascal , Fantozzi Gilbert
Published: June 2017

The fatigue behavior of a Ceramic Matrix Composite (CMC) at intermediate temperature under air is investigated. Because of the low density and the high tensile strength of CMC, they offer a good technical solution to design aeronautical structural components. The aim of the present study is to compare the behavior of this composite under static and cyclic loading. Comparison between incremental static and cyclic tests shows that cyclic loading with an amplitude higher than 30% of the ultimate tensile strength has significant effects on damage and material lifetimes. In order to evaluate the remaining lifetime, several damage indicators, mainly based on the investigation of the liberated energy, are introduced. These indicators highlight critical times or characteristic times, allowing an evaluation of the remaining lifetime. A link is established with the characteristic time around 25% of the total test duration and the beginning of the matrix cracking during cyclic fatigue.
Experimental Investigation of the Acoustic Nonlinear Behavior in Granular Polymer Bonded Explosives with Progressive Fatigue Damage
Authors: Yang Zhanfeng , Tian Yong , Li Weibin , Zhou Haiqiang , Zhang Weibin , Li Jingming
Published: June 2017

The measurement of acoustic nonlinear response is known as a promising technique to characterize material micro-damages. In this paper, nonlinear ultrasonic approach is used to characterize the evolution of fatigue induced micro-cracks in polymer bonded explosives. The variations of acoustic nonlinearity with respect to fatigue cycles in the specimens are obtained in this investigation. The present results show a significant increase of acoustic nonlinearity with respect to fatigue cycles. The experimental observation of the correlation between the acoustic nonlinearity and fatigue cycles in carbon/epoxy laminates, verifies that an acoustic nonlinear response can be used to evaluate the progressive fatigue damage in the granular polymer bonded explosives. The sensitivity comparison of nonlinear and linear parameters of ultrasonic waves in the specimens shows that nonlinear acoustic parameters are more promising indicators to fatigue induced micro-damage than linear ones. The feasibility study of the micro-damage assessment of polymer bonded explosives by nonlinear ultrasonic technique in this work can be applied to damage identification, material degradation monitoring, and lifetime prediction of the explosive parts.
Comprehensive Identification of Guan-Xin-Shu-Tong Capsule via a Mass Defect and Fragment Filtering Approach by High Resolution Mass Spectrometry: In Vitro and In Vivo Study
Authors: Gao Xun , Mu Jingqing , Li Qing , Guan Shaoyi , Liu Ran , Du Yiyang , Zhang Huifen , Bi Kaishun
Published: June 2017

The Guan-Xin-Shu-Tong capsule (GXSTC) is a well-known traditional Chinese medicine that is used for the treatment of coronary heart disease. Despite its common use in China, basic pharmacological research on its active components is limited. A comprehensive analytical method using quadrupole-time-of-flight mass spectrometry (Q-TOF/MS), specifically with the Triple TOF 5600 platform, was developed to characterize the compounds in the GXSTC powder itself (in vitro) as well as the active components in healthy and heart disease model rats after its oral administration (in vivo). The 5600 platform was operated in both positive and negative ion modes, before the raw data were processed using the extracted ion chromatography (EIC), mass defect filtering (MDF) and fragment filtering (FF) techniques. With the aid of reference compounds for retention time and fragment ion comparisons, 18 compounds were unambiguously identified in vitro. An additional 56 other compounds were tentatively characterized using the accurate quasi-molecular ion mass and Tandem mass spectrometry (MS/MS) fragmentation pattern strategies. Among them, 30 compounds were characterized based on the MDF and FF approaches. Normal rats in addition to hyperlipidemic (HL) and acute blood stasis (ABS) model rats were given a single oral dose of GXSTC solution for subsequent blood analysis at 1 and 2 h after administration. A total of 24 prototypecomponents and 20 metabolites derived from GXSTC were differentially detected across the three animal groups, including the absence of four phase II phenolic acid metabolites in the ABS group and the presence of three diterpenoid-related metabolites exclusive to the HL group. The use of reference compounds as well as the mass defect and fragment-filtering strategies were critical to identify GXSTC compounds in vitro and in vivo. This can be used for further quality control and pharmacological studies aimed at characterizing the active and potential beneficial compounds of this ancient medicine.
A High-Fructose-High-Coconut Oil Diet Induces Dysregulating Expressions of Hippocampal Leptin and Stearoyl-CoA Desaturase, and Spatial Memory Deficits in Rats
Authors: Lin Ching-I , Shen Chu-Fu , Hsu Tsui-Han , Lin Shyh-Hsiang
Published: June 2017

We investigated the effects of high-fructose-high-fat diets with different fat compositions on metabolic parameters, hippocampal-dependent cognitive function, and brain leptin (as well as stearoyl-CoA desaturase (SCD1) mRNA expressions). Thirty-two male Wistar rats were divided into 3 groups, a control group (n = 8), a high-fructose soybean oil group (37.5% of fat calories, n = 12), and a high-fructose coconut oil group (37.5% of fat calories, n = 12) for 20 weeks. By the end of the study, the coconut oil group exhibited significantly higher serum fasting glucose, fructosamine, insulin, leptin, and triglyceride levels compared to those of the control and soybean oil groups. However, hippocampal leptin expression and leptin receptor mRNA levels were significantly lower, while SCD1 mRNA was significantly higher in rats fed the high-fructose-high-coconut oil diet than in rats fed the other experimental diets. In addition, the coconut oil group spent significantly less time in the target quadrant on the probe test in the Morris water maze (MWM) task. Rats fed the high-fructose-high-coconut oil diet for 20 weeks were prone to develop hyperglycemia, hyperinsulinemia, hyperleptinemia, and hypertriglyceridemia. These metabolic consequences may contribute to hippocampal-dependent memory impairment, accompanied by a lower central leptin level, and a higher SCD1 gene expression in the brain.
Impact of Virtual Touch Quantification in Acoustic Radiation Force Impulse for Skeletal Muscle Mass Loss in Chronic Liver Diseases
Authors: Nishikawa Hiroki , Nishimura Takashi , Enomoto Hirayuki , Iwata Yoshinori , Ishii Akio , Miyamoto Yuho , Ishii Noriko , Yuri Yukihisa , Takata Ryo , Hasegawa Kunihiro , Nakano Chikage , Yoh Kazunori , Aizawa Nobuhiro , Sakai Yoshiyuki , Ikeda Naoto , Takashima Tomoyuki , Nishiguchi Shuhei , Iijima Hiroko
Published: June 2017

Background and aims: We sought to clarify the relationship between virtual touch quantification (VTQ) in acoustic radiation force impulse and skeletal muscle mass as assessed by bio-electronic impedance analysis in patients with chronic liver diseases (CLDs, n = 468, 222 males and 246 females, median age = 62 years). Patients and methods: Decreased skeletal muscle index (D-SMI) was defined as skeletal muscle index (SMI) <7.0 kg/m2 for males and as SMI <5.7 kg/m2 for females, according to the recommendations in current Japanese guidelines. We examined the correlation between SMI and VTQ levels and investigated factors linked to D-SMI in the univariate and multivariate analyses. The area under the receiver operating curve (AUROC) for the presence of D-SMI was also calculated. Results: In patients with D-SMI, the median VTQ level was 1.64 meters/second (m/s) (range, 0.93–4.32 m/s), while in patients without D-SMI, the median VTQ level was 1.11 m/s (range, 0.67–4.09 m/s) (p < 0.0001). In the multivariate analysis, higher VTQ was found to be an independent predictor linked to the presence of D-SMI (p < 0.0001). In receiver operating characteristic analysis, body mass index had the highest AUROC (0.805), followed by age (0.721) and VTQ (0.706). Conclusion: VTQ levels can be useful for predicting D-SMI in patients with CLDs.
Pattern Switching in Soft Cellular Structures and Hydrogel-Elastomer Composite Materials under Compression
Authors: Hu Jianying , Zhou Yu , Liu Zishun , Ng Teng
Published: June 2017

It is well known that elastic instabilities induce pattern transformations when a soft cellular structure is compressed beyond critical limits. The nonlinear phenomena of pattern transformations make them a prime candidate for controlling macroscopic or microscopic deformation and auxetic properties of the material. In this present work, the novel mechanical properties of soft cellular structures and related hydrogel–elastomer composites are examined through experimental investigation and numerical simulations. We provide two reliable approaches for fabricating hydrogel–elastomer composites with rationally designed properties and transformed patterns, and demonstrate that different geometries of the repeat unit voids of the periodic pattern can be used to influence the global characteristics of the soft composite material. The experimental and numerical results indicate that the transformation event is dependent on the boundary conditions and material properties of matrix material for soft cellular structures; meanwhile, the deformation-triggered pattern of matrix material affects the pattern switching and mechanical properties of the hydrogel–elastomer material, thus providing future perspectives for optimal design, or serving as a fabrication suggestion of the new hydrogel–elastomer composite material.
Between Toleration and Emancipation: The Self-Empowerment of Jewish Intellectuals in the Habsburg Monarchy
Authors: Hecht Louise
Published: June 2017

Analyzing a sample of prominent Jewish intellectuals from the Bohemian lands, this article explores Jewish networks as well as cultural and political activism in the Vormärz period and during the 1848 revolution. It seeks to answer the question of whether Joseph II’s ‘Edicts of Toleration’ had, unintentionally, generated a new group within Jewish society that was determined to fight for their rights. Already during the Vormärz period, these Jewish intellectuals enjoyed a high level of social integration, but also fought the repressive structure of the Metternich regime. After the removal of legal discriminations in 1867, the majority felt a deep sense of loyalty to the state and significantly enriched the cultural and political life of the Monarchy.
Flood Inundation Mapping from Optical Satellite Images Using Spatiotemporal Context Learning and Modest AdaBoost
Authors: Liu Xiaoyi , Sahli Hichem , Meng Yu , Huang Qingqing , Lin Lei
Published: June 2017

Due to its capacity for temporal and spatial coverage, remote sensing has emerged as a powerful tool for mapping inundation. Many methods have been applied effectively in remote sensing flood analysis. Generally, supervised methods can achieve better precision than unsupervised. However, human intervention makes its results subjective and difficult to obtain automatically, which is important for disaster response. In this work, we propose a novel procedure combining spatiotemporal context learning method and Modest AdaBoost classifier, which aims to extract inundation in an automatic and accurate way. First, the context model was built with images to calculate the confidence value of each pixel, which represents the probability of the pixel remaining unchanged. Then, the pixels with the highest probabilities, which we define as ‘permanent pixels’, were used as samples to train the Modest AdaBoost classifier. By applying the strong classifier to the target scene, an inundation map can be obtained. The proposed procedure is validated using two flood cases with different sensors, HJ-1A CCD and GF-4 PMS. Qualitative and quantitative evaluation results showed that the proposed procedure can achieve accurate and robust mapping results.
A Multi-Disciplinary Approach to Remote Sensing through Low-Cost UAVs
Authors: Calvario Gabriela , Sierra Basilio , Alarcón Teresa , Hernandez Carmen , Dalmau Oscar
Published: June 2017

The use of Unmanned Aerial Vehicles (UAVs) based on remote sensing has generated low cost monitoring, since the data can be acquired quickly and easily. This paper reports the experience related to agave crop analysis with a low cost UAV. The data were processed by traditional photogrammetric flow and data extraction techniques were applied to extract new layers and separate the agave plants from weeds and other elements of the environment. Our proposal combines elements of photogrammetry, computer vision, data mining, geomatics and computer science. This fusion leads to very interesting results in agave control. This paper aims to demonstrate the potential of UAV monitoring in agave crops and the importance of information processing with reliable data flow.
A Quantile Mapping Bias Correction Method Based on Hydroclimatic Classification of the Guiana Shield
Authors: Ringard Justine , Seyler Frederique , Linguet Laurent
Published: June 2017

Satellite precipitation products (SPPs) provide alternative precipitation data for regions with sparse rain gauge measurements. However, SPPs are subject to different types of error that need correction. Most SPP bias correction methods use the statistical properties of the rain gauge data to adjust the corresponding SPP data. The statistical adjustment does not make it possible to correct the pixels of SPP data for which there is no rain gauge data. The solution proposed in this article is to correct the daily SPP data for the Guiana Shield using a novel two set approach, without taking into account the daily gauge data of the pixel to be corrected, but the daily gauge data from surrounding pixels. In this case, a spatial analysis must be involved. The first step defines hydroclimatic areas using a spatial classification that considers precipitation data with the same temporal distributions. The second step uses the Quantile Mapping bias correction method to correct the daily SPP data contained within each hydroclimatic area. We validate the results by comparing the corrected SPP data and daily rain gauge measurements using relative RMSE and relative bias statistical errors. The results show that analysis scale variation reduces rBIAS and rRMSE significantly. The spatial classification avoids mixing rainfall data with different temporal characteristics in each hydroclimatic area, and the defined bias correction parameters are more realistic and appropriate. This study demonstrates that hydroclimatic classification is relevant for implementing bias correction methods at the local scale.
ERA-PLANET, a European Network for Observing Our Changing Planet
Authors: Tsinganos Kanaris , Gerasopoulos Evangelos , Keramitsoglou Iphigenia , Pirrone Nicola ,   The ERA-PLANET Team
Published: June 2017

ERA-PLANET is a wide European network comprised of 118 researchers from 35 partner institutions located in 18 countries, aiming to strengthen the European Research Area in the domain of Earth Observation (EO) in coherence with the European participation to the Group on Earth Observation (GEO) and the program for the establishment of a European capacity for Earth Observation, COPERNICUS. It will provide more accurate, comprehensive, and authoritative information to policy and decision-makers in key societal benefit areas (SBAs), under the umbrellas of dedicated projects in the topics of: smart cities and resilient societies; resource efficiency and environmental management; global changes and environmental treaties; polar areas and natural resources. ERA-PLANET will provide advanced decision support tools and technologies aimed to better monitor our global environment and share the information and knowledge in different domains of EO by launching joint transnational calls along the above four strands. The concept of the project that tackles with strand 1, as well as an example of a specific application fitting in, are described, aspiring to promote and coordinate the “smart-city” approach into a European network of cities and non-European follower cities, serving the need for a common approach to enhance environmental and societal resilience to air pollution, urban growth, and urban heat islands, as well as other natural/manmade stresses and relevant impacts. This is achieved through the synergy among technology, government, and society, while at the same time creating bridges between local/national initiatives with GEO/GEOSS, COPERNICUS, and other smart cities and GEO relevant projects. The project addresses initiatives in European cities but also specific issues dealing with air quality management in other parts of the world. Finally, it places major emphasis on fully exploiting key-enabling technologies and firmly addressing interoperability issues, in the context of big “smart city” data, and open science.
Natural Ventilation in Vernacular Architecture of Sistan, Iran; Classification and CFD Study of Compound Rooms
Authors: Heidari Abolfazl , Sahebzadeh Sadra , Dalvand Zahra
Published: June 2017

Extensive energy consumption in construction and ventilation has caused numerous environmental problems alongside huge waste of nonrenewable natural resources in today’s world. Meanwhile, vernacular architecture has been able to sustainably adapt to climate by developing creative and local solutions which provide a comfortable living environment, consume less energy and cause less pollution than the new ways of construction, one of which is wind induced ventilation. Vernacular architecture of Sistan (southeast of Iran) is not an exception to this rule. It utilizes its own set of unique elements and techniques that are compatible with region’s climate. This original article studies wind induced ventilation and its elements in Sistan’s architecture, including: (1) roofs (Sistani, Filpush and Barrel); (2) ventilator openings (Kolak, Surak and Dariche); and (3) walls. Then, this paper continues to classify three different compound room types in Sistan’s architecture, based on orientation and use of mentioned elements by documenting thirty-two sample houses across the region: (1) stretched against the prevailing winds; (2) stretched aligned with the winds; and (3) L shaped. CFD simulations are used to study the wind behavior and evaluate the ventilation performance of these room-types. These simulations lead to guidelines to enhance the ventilation performance of existing buildings and future constructions, including: where to put the windows, which orientation maximizes the natural ventilation performance, where to consider precautions to block the undesirable winds from entering and how far from each other should different room types be built.
Coincidences of the Concave Integral and the Pan-Integral
Authors: Ouyang Yao , Li Jun , Mesiar Radko
Published: June 2017

In this note, we discuss when the concave integral coincides with the pan- integral with respect to the standard arithmetic operations + and ·. The subadditivity of the underlying monotone measure is one sufficient condition for this equality. We show also another sufficient condition, which, in the case of finite spaces, is necessary, too.
Concentrations of Polybrominated Diphenyl Ethers (PBDEs) in Water from Asunle Stream, Ile-Ife, Nigeria
Authors: Olutona Godwin O. , Oyekunle John A.O. , Ogunfowokan Aderemi O. , Fatoki Olalekan S. 
Published: June 2017

This study assessed the concentrations of polybrominated diphenylethers (PBDEs) in stream water obtained from Asunle stream, an adjoining stream of the Obafemi Awolowo University dumpsite. Water samples were collected for a period of eight months from six different locations comprising of a spot upstream in an uphill area relative to the refuse dumpsite and five others downstream along the stream course. The sampled waters were extracted with dicholoromethane using liquid-liquid extraction method and cleanup was carried out with silica gel. The final extracts after concentration were analyzed using GC-MS/MS. The recovery experiments were adequate (105%–110%). The mean levels of Ʃ6PBDEs compounds analyzed ranged from 0.03 to 0.45 ng/mL. Seasonal variability of PBDEs indicated that higher levels were found during the wet season. The levels of PBDEs recorded in this work were relatively lower compared to the values reported in the literature from other developed nations.
IS THE GREAT DECOUPLING REAL?
Authors: ŠKARE Marinko , ŠKARE Damian
Published: June 2017

The great decoupling is real. Productivity and employment/wages link changed after 1980 in many countries, not just the U.S. This study investigates the productivity and employment/wages link (1950–2014) looking for empirical proof of the “great decoupling” put forward by Brynjolfsson and Mcafee (2013). The results should stimulate policymakers to openly question why real wages and productivity don’t line up with the theory. We use the Hodrick and Prescott (1997) filter to isolate trends in real wages, labor share in GDP, and labor productivity and rolling correlation to explore if the great decoupling is real. We have found that the great decoupling i.e. The divergence between real wages/employment and productivity is present in all countries (10 in the sample). The dynamics of the great decoupling are however different between the countries although year 1980 seems to be a dominant breaking point for the start of the phenomena. This paper provides multicounty empirical proof of the presence of the great decoupling phenomena and explores its dynamics over 1950–2014. Policy makers as well as firms and unions should take the existence of this phenomena seriously since it can have significant consequences on economic growth and labor markets’ functioning.
RISKY MULTI-CRITERIA GROUP DECISION MAKING ON GREEN CAPACITY INVESTMENT PROJECTS BASED ON SUPPLY CHAIN
Authors: SONG Yan , YAO Shuang , YU Donghua , SHEN Yan
Published: June 2017

Green capacity investment projects have rapidly emerged involving suppliers, customers, and manufacturing organizations in supply chain systems with environmental challenges. This paper focuses on and identifies both primary strategic and operational elements that will aid managers in evaluating and making risky multi-criteria decisions on green capacity investment projects. We propose a cloud prospect value consensus process consisting of feedback and adjustment mechanisms that provide modification instructions to the corresponding decision makers for a decision matrix based on the cloud model and prospect theory, which considers psychological behavior, disagreements between decision makers, and the ambiguity of linguistic variable assessment across multi-criteria risks. The new model increases the efficiency and accuracy of decision making. To verify the feasibility and validity of the Cloud Prospect Value Consensus Degree based on the Feedback adjustment mechanism, its performance is compared with three state-of-the-art multi-criteria group decision-making methods.
THE IMPACT OF BIOFUELS UTILISATION IN TRANSPORT ON THE SUSTAINABLE DEVELOPMENT IN THE EUROPEAN UNION
Authors: SIMIONESCU Mihaela , ALBU Lucian-Liviu , RAILEANU SZELES Monica , BILAN Yuriy
Published: June 2017

The biofuels sustainability in transport depends on the energetic products demand and the limited resources. According to European legislation, the energy consumption in transport from renewable energy in the European Union should increase by 10% till 2020. Considering the environmental requests related to greenhouse gases reduction and a lower dependency on oil fuels stimulated more the biofuels production, this research empirically assessed the impact of energy consumption in transport based on biodiesel and bioethanol on sustainable development in terms of economic growth and greenhouse emissions. Using dynamic panel and panel vector-auto-regression models for European Union countries during 2010–2015, we proved that only the energy consumption in transport based on biodiesel had a positive impact on economic growth. The greenhouse emissions did not have any impact on economic growth while the energy consumption in transport based on bioethanol negatively affected the economic growth. The Granger causality tests on panel data indicated a bilateral relationship between economic growth and energy consumption in transport based on biodiesel and between economic growth and energy consumption in transport based on bioethanol. Given these empirical results, the energy policies should focus on the higher utilisation of biodiesel in transport in the EU.
Figurativeness in the Sense of Distraction (Studies by Lithuanian Authors)
Authors: Monginaitė Laimutė
Published: June 2017

The phenomenon of the sense of distraction and the feature of figurativeness in it are analysed with the help of phenomenological description, the concept of sense of Juozas Mureika and the conception of imagination of Kristupas Sabolius. The position is followed that the acts of sense and the being of those existing found in them cannot be known in a purely rational way. Knowing is reached with intuitive insights. The experiencing of distraction is approached as one of the norms or intentions of consciousness. The sense of distraction is acknowledged to be a basic value becoming more and more important in a modern stressful life. The article indicates that the intentional beings of the sense of distraction are expressed in really various human activities and are distinguished with mono-subjectivity and unrepeatable feeling. Figurativeness is perceived as the result of imaginary, creative activity of the imagination and aesthetical quality. The peculiarities of the formation of figurativeness are revealed through the phenomenological description of imagination by Sabolius. Four features of the act of visualisation, determining the quality of figurativeness, are emphasized: intentionality, power of transformation, relation with emotions and the symbolism of the image. The conclusion is made that figurativeness, being the result of the creative act (visualisation) of imagination, appears as aesthetical quality or the ensemble of qualities. Figurativeness sharpens the sense of distraction and calls the wave of new experiences.
Y KARTOS DARBUOTOJŲ IR ORGANIZACIJOS ATITIKIMO REIKŠMĖ PASITENKINIMUI DARBU
Authors: Pitrinaitė Greta , Korsakienė Renata
Published: June 2017

Pastaruoju metu į darbo rinką ateina išsilavinusi, laisvai naujomis informacinėmis technologijomis besinaudojanti, orientuota į pasiekimus ir trokštanti dėmesio darbuotojų karta, taip vadinama Y karta. Reikia pastebėti, kad ši karta sudaro vieną greičiausiai augančių rinkos segmentų. Šiai kartai būdinga dažnai keisti darbo vietą. Todėl darbdaviai, siekiantys išlaikyti šios kartos atstovus, turi atsižvelgti į šios kartos darbuotojų poreikius. Viena iš sąlygų, užtikrinančių darbuotojų pasitenkinimą darbu ir lojalumą organizacijai yra tinkama organizacinė kultūra. Todėl darbdaviai, siekdami išlaikyti gerus specialistus, kuria palankią organizacinę kultūrą, kuri yra itin svarbi siekiant užtikrinti verslo produktyvumą ir efektyvumą. Straipsnyje nagrinėjama darbuotojo-organizacijos atitikimo įtaka darbuotojų išlaikymui ir pasitenkinimui darbu. Šio straipsnio tikslas: atsižvelgiant į Y kartos darbuotojų ypatybes, atskleisti darbuotojo-organizacijos atitikimo reikšmę darbuotojų pasitenkinimui darbu. Atliktas tyrimas grindžiamas mokslinės literatūros analize ir sinteze įvairių kartų, darbuotojų ir organizacijos atitikimo bei pasitenkinimo darbu klausimais. Straipsnis integruoja įvairius mokslinius tyrimus ir pateikia rekomendacijas būsimiems moksliniams tyrimams.
PERSONALO PRIEŠINIMOSI INOVATYVIEMS POKYČIAMS PRIEŽASČIŲ
ANALIZĖ
Authors: Aršauskaitė Justina , Drejeris Rolandas
Published: June 2017

Dažnas darbuotojų pasipriešinimas organizacijų diegiamoms naujovėms yra vienas iš svarbių organizacijos
kaitos barjerų ir vienas iš darbo santykių neigiamų dirgiklių. Pasipriešinimo priežasčių identifikavimas
yra aktualus klausimas kiekvienai organizacijai, kadangi kaitos greitis gali turėti įtakos įmonių, planuojančių
diegti inovacijas, konkurencingumui. Todėl naudinga ne tik žinoti galimo pasipriešinimo priežastis, bet ir būti
pasiruošus suvaldyti numanomą pasipriešinimą. Svarbią reikšmę naujovių suvokimui ir įgyvendinimo poreikio
pritarimui turi organizacijos vidinis klimatas bei darbuotojų nuostatos. Analizuojamos priežastys, dažniausiai
sukeliančios pasipriešinimą bei strategijos, padedančios sušvelninti ar eliminuoti personalo pasipriešinimą inovacijų
diegimui.
H. MARKOWITZ‘O MODELIO TINKAMUMO BALTIJOS VERTYBINIŲ POPIERIŲ BIRŽAI TIKRINIMAS
Authors: Zakarkaitė Aušrinė , Filipavičius Viktoras
Published: June 2017

Straipsnyje siekiama išsiaiškinti H. Markowitz‘o efektyvaus portfelio teorijos (modelio) tinkamumą Baltijos šalių vertybinių popierių biržai. Autoriai analiziškai išsprendė H. Markowitz‘o uždavinį efektyviam portfeliui rasti, penkių aktyvų atveju. Pasirinktoms penkioms likvidžiausioms Baltijos šalių vertybinių popierių biržos akcijoms buvo nustatyta minimalios dispersijos aibė ir patikrinta, ar realus šių akcijų portfelis yra efektyvus, H. Markowitz‘o teorijos požiūriu. Gauta, kad realus portfelis yra arti globalaus dispersijos minimumo taško. Taip pat, atskiru investavimo į likvidžiausias penkias akcijas atveju, gauta, kad investuotojai yra konservatyvūs, t. y. jie investuoja į akcijų portfelį su mažiausia rizika (mažiausia portfelio grąžos dispersija). Ateityje autoriai planuoja tęsti šį tyrimą Baltijos šalių vertybinių popierių biržos indeksams bei didesniam akcijų skaičiui, siekdami patikrinti hipotezę, kad ir kitoms akcijoms galioja šio tyrimo atskleisti dėsningumai.
GLOBALIZACIJOS POVEIKIS EUROPOS SĄJUNGOS NEKILNOJAMOJO TURTO VYSTYMUI
Authors: Jovaišienė Indrė , Chlivickas Eugenijus
Published: June 2017

Globalizacijos sąvoka plačiai naudojama literatūroje, tačiau iki šiol nėra priimtos visuotinės globalizacijos koncepcijos. Šiame darbe analizuojama globalizacijos samprata, globalizacijos procesas, jos poveikis ekonomikai. Yra lyginami įvairių mokslininkų požiūriai į globalizaciją. Šiuolaikinėmis sąlygomis globaliai ekonomikai būdinga problema – prisitaikyti prie sparčių pokyčių ir nuolat besikeičiančios rinkos pasauliniu mastu. Todėl straipsnyje nagrinėjama nekilnojamojo turto rinka, jos požymiai, nekilnojamojo turto vystymo proceso modeliai. Aprašomi išoriniai veiksniai, turintys įtakos nekilnojamojo turto plėtrai Europos Sąjungoje. Autorių pozicijos pateikiamos apibrėžiant sąvokas bei analizuojant veiksnių padarinius, galinčius pasireikšti nekilnojamojo turto vystymo procese.
AUKŠTŲJŲ TECHNOLOGIJŲ KŪRIMAS, SKLAIDA IR ĮGYVENDINIMAS:
TARPTAUTINĖ VADYBA IR VERTĖS GRANDINIŲ MODELIAI
Authors: Kvedarienė Audronė , Švedienė Laima
Published: June 2017

Šio straipsnio tikslas – išanalizuoti aukštųjų technologijų sektoriaus kūrimo, sklaidos ir įgyvendinimo vertės
grandinės procesą sistemų teorijos požiūriu. Susisteminus aukštųjų technologijų kūrimo, sklaidos ir įgyvendinimo
sektorių tyrimo validumo apribojimus, dėl aukštųjų technologijų apibrėžimo bei atitinkamai statistinių duomenų rinkimo
kompleksiškumo, toliau analizuojama Lietuvos aukštųjų technologijų sektorių problematika, operuojant inovacijų
sąvoka, kuri yra platesnė už aukštųjų technologijų sampratą, tačiau itin aktuali, nes apima ne tik mokslinius tyrimus bei
eksperimentinę plėtrą (MTEP), kuriant bei skleidžiant aukštąsias technologijas, bet ir jų įgyvendinimą. Pateikta ES
inovacijų indekso bei globaliojo inovacijų indekso lyginamoji analizė, kuri atskleidžia Lietuvos inovacijų sistemų
neefektyvumą bei šios srities tyrimų aktualumą. Dėl aukštųjų technologijų sektoriaus kompleksiškumo, siūloma problematiką
analizuoti sistemų teorijos požiūriu, todėl apibendrinamos sistemų teorijos bei pateikiamas koncepcinis aukštųjų
technologijų kūrimo, sklaidos ir įgyvendinimo kibernetinis modelis.
An Updated 2017 Astrometric Solution for Betelgeuse
Authors: Harper G. M. , Brown A. , Guinan E. F. , O’Gorman E. , Richards A. M. S. , Kervella P. , Decin L.
Published: June 2017

We provide an update for the astrometric solution for the Type II supernova progenitor Betelgeuse using the revised Hipparcos Intermediate Astrometric Data (HIAD) of van Leeuwen, combined with existing VLA and new e-MERLIN and ALMA positions. The 2007 Hipparcos refined abscissa measurements required the addition of so-called Cosmic Noise of 2.4 mas to find an acceptable 5-parameter stochastic solution. We find that a measure of radio Cosmic Noise should also be included for the radio positions because surface inhomogeneities exist at a level significant enough to introduce additional intensity centroid uncertainty. Combining the 2007 HIAD with the proper motions based solely on the radio positions leads to a parallax of

mas (

pc), smaller than the Hipparcos 2007 value of 6.56 ± 0.83 mas (

pc). Furthermore, combining the VLA and new e-MERLIN and ALMA radio positions with the 2007 HIAD, and including radio Cosmic Noise of 2.4 mas, leads to a nominal parallax solution of 4.51 ± 0.80 mas (

pc), which, while only

different from the 2008 solution of Harper et al., is 2.6σ different from the solution of van Leeuwen. An accurate and precise parallax for Betelgeuse is always going to be difficult to obtain because it is small compared to the stellar angular diameter (

mas). We outline an observing strategy utilizing future mm and sub-mm high-spatial resolution interferometry that must be used if substantial improvements in the precision and accuracy of the parallax and distance are to be achieved.
Thermal Feedback in the High-mass Star- and Cluster-forming Region W51
Authors: Ginsburg Adam , Goddi Ciriaco , Kruijssen J. M. Diederik , Bally John , Smith Rowan , Galván-Madrid Roberto , Mills Elisabeth A.C. , Wang Ke , Dale James E. , Darling Jeremy , Rosolowsky Erik , Loughnane Robert , Testi Leonardo , Bastian Nate
Published: June 2017

High-mass stars have generally been assumed to accrete most of their mass while already contracted onto the main sequence, but this hypothesis has not been observationally tested. We present ALMA observations of a

pc area in the W51 high-mass star-forming complex. We identify dust continuum sources and measure the gas and dust temperature through both rotational diagram modeling of

and brightness-temperature-based limits. The observed region contains three high-mass YSOs that appear to be at the earliest stages of their formation, with no signs of ionizing radiation from their central sources. The data reveal high gas and dust temperatures (

K) extending out to about 5000 au from each of these sources. There are no clear signs of disks or rotating structures down to our 1000 au resolution. The extended warm gas provides evidence that, during the process of forming, these high-mass stars heat a large volume and correspondingly large mass of gas in their surroundings, inhibiting fragmentation and therefore keeping a large reservoir available to feed from. By contrast, the more mature massive stars that illuminate compact

regions have little effect on their surrounding dense gas, suggesting that these main-sequence stars have completed most or all of their accretion. The high luminosity of the massive protostars (

), combined with a lack of centimeter continuum emission from these sources, implies that they are not on the main sequence while they accrete the majority of their mass; instead, they may be bloated and cool.
Isotropic–Nematic Phase Transitions in Gravitational Systems
Authors: Roupas Zacharias , Kocsis Bence , Tremaine Scott
Published: June 2017

We examine dense self-gravitating stellar systems dominated by a central potential, such as nuclear star clusters hosting a central supermassive black hole. Different dynamical properties of these systems evolve on vastly different timescales. In particular, the orbital-plane orientations are typically driven into internal thermodynamic equilibrium by vector resonant relaxation before the orbital eccentricities or semimajor axes relax. We show that the statistical mechanics of such systems exhibit a striking resemblance to liquid crystals, with analogous ordered-nematic and disordered-isotropic phases. The ordered phase consists of bodies orbiting in a disk in both directions, with the disk thickness depending on temperature, while the disordered phase corresponds to a nearly isotropic distribution of the orbit normals. We show that below a critical value of the total angular momentum, the system undergoes a first-order phase transition between the ordered and disordered phases. At a critical point, the phase transition becomes second order, while for higher angular momenta there is a smooth crossover. We also find metastable equilibria containing two identical disks with mutual inclinations between 90° and 180°.
Radio Luminosity Function of Flat-spectrum Radio Quasars
Authors: Mao Peiyuan , Urry C. Megan , Marchesini Ezequiel , Landoni Marco , Massaro Francesco , Ajello Marco
Published: June 2017

We present the radio luminosity function (LF) of flat-spectrum radio quasars (FSRQ), using the the largest and most complete sample to date. Cross-matching between the FIRST 20 cm and GB6 6 cm radio surveys, we find 638 flat-spectrum radio sources above 220 mJy at 1.4 GHz; of these, 327 are are classified and verified using optical spectroscopy data, mainly from Sloan Digital Sky Survey Data Release 12. We also considered flat-spectrum radio sources that lack both literature references and optical spectroscopy, and we identified 12 out of the 43 such sources to potentially be FSRQs, using their WISE colors. From the fully identified sample of 242 FSRQs, we derived the radio LF and cosmic evolution of blazars at 1.4 GHz, finding good agreement with previous work at 5 GHz. The number density of FSRQs increases dramatically to a redshift of z ∼ 2 and then declines for higher redshifts. Furthermore, the redshift at which the quasar density peaks is clearly dependent on luminosity, with more luminous sources peaking at higher redshifts. The approximate best-fit LF for a luminosity-dependent evolutionary model is a broken power-law with slopes ∼0.7 and ∼1.7 below and above the break luminosity,

 erg s−1, respectively.
Magnetohydrodynamic Simulations for Studying Solar Flare Trigger Mechanism
Authors: Muhamad J. , Kusano K. , Inoue S. , Shiota D.
Published: June 2017

In order to understand the flare trigger mechanism, we conduct three-dimensional magnetohydrodynamic simulations using a coronal magnetic field model derived from data observed by the Hinode satellite. Several types of magnetic bipoles are imposed into the photospheric boundary of the Nonlinear Force-free Field model of Active Region (AR) NOAA 10930 on 2006 December 13, to investigate what kind of magnetic disturbance may trigger the flare. As a result, we confirm that certain small bipole fields, which emerge into the highly sheared global magnetic field of an AR, can effectively trigger a flare. These bipole fields can be classified into two groups based on their orientation relative to the polarity inversion line: the so-called opposite polarity, and reversed shear structures, as suggested by Kusano et al. We also investigate the structure of the footpoints of reconnected field lines. By comparing the distribution of reconstructed field lines and observed flare ribbons, the trigger structure of the flare can be inferred. Our simulation suggests that the data-constrained simulation, taking into account both the large-scale magnetic structure and small-scale magnetic disturbance (such as emerging fluxes), is a good way to discover a flare-producing AR, which can be applied to space weather prediction.
Search for Very High-energy Gamma Rays from the Northern Fermi Bubble Region with HAWC
Authors: Abeysekara A. U. , Albert A. , Alfaro R. , Alvarez C. , Álvarez J. D. , Arceo R. , Arteaga-Velázquez J. C. , Ayala Solares H. A. , Barber A. S. , Bautista-Elivar N. , Becerril A. , Belmont-Moreno E. , BenZvi S. Y. , Berley D. , Braun J. , Brisbois C. , Caballero-Mora K. S. , Capistrán T. , Carramiñana A. , Casanova S. , Castillo M. , Cotti U. , Cotzomi J. , Coutiño de León S. , De León C. , De la Fuente E. , Hernandez R. Diaz , Dingus B. L. , DuVernois M. A. , Díaz-Vélez J. C. , Ellsworth R. W. , Engel K. , Fick B. , Fiorino D. W. , Fleischhack H. , Fraija N. , García-González J. A. , Garfias F. , Gerhardt M. , González Muñoz A. , González M. M. , Goodman J. A. , Hampel-Arias Z. , Harding J. P. , Hernandez S. , Hernandez-Almada A. , Hinton J. , Hona B. , Hui C. M. , Hüntemeyer P. , Iriarte A. , Jardin-Blicq A. , Joshi V. , Kaufmann S. , Kieda D. , Lara A. , Lauer R. J. , Lee W. H. , Lennarz D. , Vargas H. León , Linnemann J. T. , Longinotti A. L. , Raya G. Luis , Luna-García R. , López-Coto R. , Malone K. , Marinelli S. S. , Martinez O. , Martinez-Castellanos I. , Martínez-Castro J. , Martínez-Huerta H. , Matthews J. A. , Miranda-Romagnoli P. , Moreno E. , Mostafá M. , Nellen L. , Newbold M. , Nisa M. U. , Noriega-Papaqui R. , Pelayo R. , Pretz J. , Pérez-Pérez E. G. , Ren Z. , Rho C. D. , Rivière C. , Rosa-González D. , Rosenberg M. , Ruiz-Velasco E. , Salazar H. , Greus F. Salesa , Sandoval A. , Schneider M. , Schoorlemmer H. , Sinnis G. , Smith A. J. , Springer R. W. , Surajbali P. , Taboada I. , Tibolla O. , Tollefson K. , Torres I. , Ukwatta T. N. , Vianello G. , Weisgarber T. , Westerhoff S. , Wisher I. G. , Wood J. , Yapici T. , Yodh G. B. , Zepeda A. , Zhou H.
Published: June 2017

We present a search for very high-energy gamma-ray emission from the Northern Fermi Bubble region using data collected with the High Altitude Water Cherenkov gamma-ray observatory. The size of the data set is 290 days. No significant excess is observed in the Northern Fermi Bubble region, so upper limits above 1 TeV are calculated. The upper limits are between

and

. The upper limits disfavor a proton injection spectrum that extends beyond 100 TeV without being suppressed. They also disfavor a hadronic injection spectrum derived from neutrino measurements.
(En) quête d’un masculin
Authors: Berruyer-Lamoine Bénédicte
Published: June 2017

Par quels chemins identificatoires passe le jeune garçon dans la construction de son masculin ? A rester uniquement du côté de la rivalité œdipienne et de l’angoisse de castration, on ne comprend pas le « manque à être homme » de certains hommes en analyse. Explorer les positions homosexuelles passives du garçon envers l’image paternelle et ses identifications féminines ouvre des possibilités d’écoute clinique et de compréhension du masculin.
Il était une femme en devenir
Authors: Hussmann Agnès
Published: June 2017

Cet article nous relate le cheminement de Jeanine, qui meurtrie dans son corps vient se pencher sur son histoire et tente de comprendre l’impact de violences sexuelles subies dans son enfance. Ces traumatismes sexuels (viols, attouchements) dans son contexte familial sont venus brouiller les repères sur lesquels il lui était possible de s’appuyer pour se différencier et s’identifier à des repères masculins et féminins fiables. Ils ont également court-circuité son activité fantasmatique. Aussi, Jeanine vient interroger en thérapie sa difficulté à devenir femme et mère. Le rêve éveillé vient lui proposer un support de projection pour mettre à distance son vécu traumatique et lui permettre de s’inscrire dans un cheminement d’élaboration.
Créativité transitionnelle et différence des sexes
Authors: Arènes Jacques
Published: June 2017

Quand les espaces du masculin et du féminin ne sont plus gravés dans le marbre culturel, le genre – au sens psycho-dynamique du terme – se joue d’abord au cœur du psychisme des sujets, mais il est aussi tissé dans l’intersubjectivité. Il ne peut pas se penser de manière substantielle, mais comme un champ de forces complexe, se déployant dans et entre les personnes, tissé par de multiples liens et différences. Ce tissage du genre s’élabore dans l’espace transitionnel généré par le couple, en un « savoir » du corps de l’autre – et de son propre corps – s’accompagnant de contacts psychiques sectoriels. Les « frontières » de la différence des sexes constituent alors le reflet virtuel de l’énigme mutuelle constituée par deux types d’expériences, pour une part intraduisibles, sauf peut-être quand le temps favorable le permet, toujours ponctuellement. Comme dans cette expérience de mécanique quantique dans laquelle deux particules, aussi éloignées soient elles dans l’espace, demeurent mystérieusement liées.
Probiotic guidelines and physician practice: a cross-sectional survey and overview of the literature
Authors: Draper K. , Ley C. , Parsonnet J.
Published: June 2017

Probiotic use by patients and physicians has dramatically increased over the last decade, although definitive evidence is often lacking for their use. We examined probiotic-prescribing practices among health care providers (HCP) at a tertiary medical centre and compared these practices to clinical guidelines. HCP at the Stanford Medical Center received a survey on probiotic prescribing practices including choice of probiotic and primary indications. A broad overview of the literature was performed. Among 2,331 HCP surveyed, 632 responded. Of the 582 of these who routinely prescribed medications, 61% had recommended probiotic foods or supplements to their patients. Women and gastroenterologists were more likely to prescribe probiotics (odds ratio (OR): 1.5, 95% confidence interval (CI): 1.0-2.1; OR: 3.9, 95% CI: 1.5-10.1, respectively). Among probiotic prescribers, 50% prescribed inconsistently or upon patient request, and 40% left probiotic choice to the patient. Common indications for probiotics, particularlyLactobacillusGG, were prevention and treatment of antibiotic-associated diarrhoea (79 and 66%, respectively). Probiotics were often prescribed for ‘general bowel health’ or at patient request (27 and 39% of responders, respectively). Most respondents (63%) thought an electronic medical record (EMR) pop-up would change probiotic prescribing patterns. However, a review of published guidelines and large trials found inconsistencies in probiotic indications, dosages and strain selection. Probiotic prescribing is common but lacks consistency, with choice of probiotic frequently left to the patient, even for indications with some strain-specific evidence. Implementation of EMR pop-ups/pocket guides may increase consistency in probiotic prescribing, although the lack of clear and consistent guidelines must first be addressed with large, well-designed clinical trials.
Interaction of vaginal Lactobacillus strains with HeLa cells plasma membrane
Authors: Calonghi N. , Parolin C. , Sartor G. , Verardi L. , Giordani B. , Frisco G. , Marangoni A. , Vitali B.
Published: June 2017

Vaginal lactobacilli offer protection against recurrent urinary and vaginal infections. The precise mechanisms underlying the interaction between lactobacilli and the host epithelium remain poorly understood at the molecular level. Deciphering such events can provide valuable information on the mode of action of commensal and probiotic bacteria in the vaginal environment. We investigated the effects exerted by five Lactobacillus strains of vaginal origin (Lactobacillus crispatus BC1 and BC2, Lactobacillus gasseri BC9 and BC11 and Lactobacillus vaginalis BC15) on the physical properties of the plasma membrane in a cervical cell line (HeLa). The interaction of the vaginal lactobacilli with the cervical cells determined two kinds of effects on plasma membrane: (1) modification of the membrane polar lipid organisation and the physical properties (L. crispatus BC1 and L. gasseri BC9); (2) modification of α5β1 integrin organisation (L. crispatus BC2, L. gasseri BC11 and L. vaginalis BC15). These two mechanisms can be at the basis of the protective role of lactobacilli against Candida albicans adhesion. Upon stimulation with all Lactobacillus strains, we observed a reduction of the basal oxidative stress in HeLa cells that could be related to modifications in physical properties and organisation of the plasma membrane. These results confirm the strictly strain-specific peculiarities of Lactobacillus and deepen the understanding of the mechanisms underlying the health-promoting role of this genus within the vaginal ecosystem.