bluuebunny/crossref_metadata_2025 huggingface dataset:
One-Step Low Temperature Hydrothermal Synthesis of Flexible TiO2/PVDF@MoS2 Core-Shell Heterostructured Fibers for Visible-Light-Driven Photocatalysis and Self-Cleaning
Authors: Zhang Zhi-Guang , Liu Hui , Wang Xiao-Xiong , Zhang Jun , Yu Miao , Ramakrishna Seeram , Long Yun-Ze
Published: March 2019

Novel flexible and recyclable core-shell heterostructured fibers based on cauliflower-like MoS2 and TiO2/PVDF fibers have been designed through one-step hydrothermal treatment based on electrospun tetrabutyl orthotitanate (TBOT)/PVDF fibers. The low hydrothermal temperature avoids the high temperature process and keeps the flexibility of the as-synthesized materials. The formation mechanism of the resultant product is discussed in detail. The composite of MoS2 not only expands the light harvesting window to include visible light, but also increases the separation efficiency of photo-generated electrons and holes. The as-prepared product has proven to possess excellent and stable photocatalytic activity in the degradation of Rhodamine B and levofloxacin hydrochloride under visible light irradiation. In addition, the TiO2/PVDF@MoS2 core-shell heterostructured fibers exhibit self-cleaning property to dye droplets under visible light irradiation. Meanwhile, due to its hydrophobicity, the resultant product can automatically remove dust on its surface under the rolling condition of droplets. Hence, the as-prepared product cannot only degrade the contaminated compounds on the surface of the material, but also reduce the maintenance cost of the material due to its self-cleaning performance. Therefore, the as-prepared product possesses potential applications in degradation of organic pollutants and water treatment, which makes it a prospective material in the field of environmental treatment.
Glycemia Lowering Effect of an Aqueous Extract of Hedychium coronarium Leaves in Diabetic Rodent Models
Authors: Tse Ling-Shan , Liao Po-Lin , Tsai Chi-Hao , Li Ching-Hao , Liao Jiunn-Wang , Kang Jaw-Jou , Cheng Yu-Wen
Published: March 2019

Hedychium coronarium has a long history of use worldwide as a food and in folk medicine. In this study, we aimed to investigate the effect of an aqueous extract of H. coronarium leaves (HC) on type 2 diabetes mellitus (T2DM). Two types of animal models were used in this study: Streptozotocin (STZ)-induced T2DM (Wistar rats; N = 8) and C57BKSdb/db mice (N = 5). After treatment with HC for 28 days, glucose tolerance improved in both of the diabetic animal models. As significant effects were shown after 14 days of treatment in the STZ-induced T2DM model, we carried out the experiments with it. After 28 days of treatment with HC, the levels of cholesterol, triglyceride, high-density lipoprotein, and low-density lipoprotein were significantly improved in the STZ-induced T2DM model. The lesions degree of islet β-cells was decreased after the HC treatment. Although the insulin level increased moderately, the aldosterone level was significantly decreased in the HC-treated groups, suggesting that aldosterone might play an important role in this effect. In summary, HC is a natural product and it is worth exploring its effect on T2DM.
Development of a Microwave-assisted Chemoselective Synthesis of Oxime-linked Sugar Linkers and Trivalent Glycoclusters
Authors: McReynolds Katherine , Dimas Dustin , Floyd Grace , Zeman Kara
Published: March 2019

A rapid, high-yielding microwave-mediated synthetic procedure was developed and optimized using a model system of monovalent sugar linkers, with the ultimate goal of using this method for the synthesis of multivalent glycoclusters. The reaction occurs between the aldehyde/ketone on the sugars and an aminooxy moiety on the linker/trivalent core molecules used in this study, yielding acid-stable oxime linkages in the products and was carried out using equimolar quantities of reactants under mild aqueous conditions. Because the reaction is chemoselective, sugars can be incorporated without the use of protecting groups and the reactions can be completed in as little as 30 min in the microwave. As an added advantage, in the synthesis of the trivalent glycoclusters, the fully substituted trivalent molecules were the major products produced in excellent yields. These results illustrate the potential of this rapid oxime-forming microwave-mediated reaction in the synthesis of larger, more complex glycoconjugates and glycoclusters for use in a wide variety of biomedical applications.
Viscoelastic Properties of Crosslinked Chitosan Films
Authors: Khouri Joseph , Penlidis Alexander , Moresoli Christine
Published: March 2019

Chitosan films containing citric acid were prepared using a multi-step process called heterogeneous crosslinking. These films were neutralized first, followed by citric acid addition, and then heat treated at 150 °C/0.5 h in order to potentially induce covalent crosslinking. The viscoelastic storage modulus, E′, and tanδ were studied using dynamic mechanical analysis, and compared with neat and neutralized films to elucidate possible crosslinking with citric acid. Films were also prepared with various concentrations of a model crosslinker, glutaraldehyde, both homogeneously and heterogeneously. Based on comparisons of neutralized films with films containing citric acid, and between citric acid films either heat treated or not heat treated, it appeared that the interaction between chitosan and citric acid remained ionic without covalent bond formation. No strong evidence of a glass transition from the tanδ plots was observable, with the possible exception of heterogeneously crosslinked glutaraldehyde films at temperatures above 200 °C.
Korean Scholars’ Use of For-Pay Editors and Perceptions of Ethicality
Authors: Kim Eun-Young Julia
Published: March 2019

Many Korean scholars rely on language professionals for preparing English manuscripts. So far, little has been reported on how Korean scholars utilize them and how they perceive various types of help received. This study examines how Korean scholars utilize for-pay editors and translators, and how they perceive various types of textual modifications incurred in the process, based on the data obtained through a survey completed by 88 Korean faculty from three universities. Half of the participants received proofreading help from for-pay editors, and fewer participants received help with translation. They held widely differing views on ethicality concerning scenarios that involved global- and content-level editing; none of the help described was perceived as clearly unethical. This paper argues that as the academic communities benefit from the knowledge and insights created through research conducted by scholars across the world, it is necessary to establish proper boundaries of writing help.
A Reconstructed Indigenous Religious Tradition in Latvia
Authors: Stasulane Anita
Published: March 2019

In the early 20th century, Dievturība, a reconstructed form of paganism, laid claim to the status of an indigenous religious tradition in Latvia. Having experienced various changes over the course of the century, Dievturība has not disappeared from the Latvian cultural space and gained new manifestations with an increase in attempts to strengthen indigenous identity as a result of the pressures of globalization. This article provides a historical analytical overview about the conditions that have determined the reconstruction of the indigenous Latvian religious tradition in the early 20th century, how its form changed in the late 20th century and the types of new features it has acquired nowadays. The beginnings of the Dievturi movement show how dynamic the relationship has been between indigeneity and nationalism: indigenous, cultural and ethnic roots were put forward as the criteria of authenticity for reconstructed paganism, and they fitted in perfectly with nativist discourse, which is based on the conviction that a nation’s ethnic composition must correspond with the state’s titular nation. With the weakening of the Soviet regime, attempts emerged amongst folklore groups to revive ancient Latvian traditions, including religious rituals as well. Distancing itself from the folk tradition preservation movement, Dievturība nowadays nonetheless strives to identify itself as a Latvian lifestyle movement and emphasizes that it represents an ethnic religion which is the people’s spiritual foundation and a part of intangible cultural heritage. In the 21st century, Dievturība is characterized by conflicting aspects: on the one hand, a desire is expressed to contrast itself and its ethnic views from globalization tendencies in its activities, but on the other hand New Age concepts and a self-reflexive character has entered its discourse.
A Hierarchical Convolution Neural Network (CNN)-Based Ship Target Detection Method in Spaceborne SAR Imagery
Authors: Wang Jun , Zheng Tong , Lei Peng , Bai Xiao
Published: March 2019

The ghost phenomenon in synthetic aperture radar (SAR) imaging is primarily caused by azimuth or range ambiguities, which cause difficulties in SAR target detection application. To mitigate this influence, we propose a ship target detection method in spaceborne SAR imagery, using a hierarchical convolutional neural network (H-CNN). Based on the nature of ghost replicas and typical target classes, a two-stage CNN model is built to detect ship targets against sea clutter and the ghost. First, regions of interest (ROIs) were extracted from a large imaged scene during the coarse-detection stage. Unwanted ghost replicas represented major residual interference sources in ROIs, therefore, the other CNN process was executed during the fine-detection stage. Finally, comparative experiments and analyses, using Sentinel-1 SAR data and various assessment criteria, were conducted to validate H-CNN. Our results showed that the proposed method can outperform the conventional constant false-alarm rate technique and CNN-based models.
Exploitation of Sentinel-2 Time Series to Map Burned Areas at the National Level: A Case Study on the 2017 Italy Wildfires
Authors: Filipponi Federico
Published: March 2019

Satellite data play a major role in supporting knowledge about fire severity by delivering rapid information to map fire-damaged areas in a precise and prompt way. The high availability of free medium-high spatial resolution optical satellite data, offered by the Copernicus Programme, has enabled the development of more detailed post-fire mapping. This research study deals with the exploitation of Sentinel-2 time series to map burned areas, taking advantages from the high revisit frequency and improved spatial and spectral resolution of the MSI optical sensor. A novel procedure is here presented to produce medium-high spatial resolution burned area mapping using dense Sentinel-2 time series with no a priori knowledge about wildfire occurrence or burned areas spatial distribution. The proposed methodology is founded on a threshold-based classification based on empirical observations that discovers wildfire fingerprints on vegetation cover by means of an abrupt change detection procedure. Effectiveness of the procedure in mapping medium-high spatial resolution burned areas at the national level was demonstrated for a case study on the 2017 Italy wildfires. Thematic maps generated under the Copernicus Emergency Management Service were used as reference products to assess the accuracy of the results. Multitemporal series of three different spectral indices, describing wildfire disturbance, were used to identify burned areas and compared to identify their performances in terms of spectral separability. Result showed a total burned area for the Italian country in the year 2017 of around 1400 km2, with the proposed methodology generating a commission error of around 25% and an omission error of around 40%. Results demonstrate how the proposed procedure allows for the medium-high resolution mapping of burned areas, offering a benchmark for the development of new operational downstreaming services at the national level based on Copernicus data for the systematic monitoring of wildfires.
A Concave Hull Methodology for Calculating the Crown Volume of Individual Trees Based on Vehicle-Borne LiDAR Data
Authors: Yan Zhaojin , Liu Rufei , Cheng Liang , Zhou Xiao , Ruan Xiaoguang , Xiao Yijia
Published: March 2019

Crown volume is an important tree factor used in forest surveys as a prerequisite for estimating biomass and carbon stocks. This study developed a method for accurately calculating the crown volume of individual trees from vehicle-borne laser scanning (VLS) data using a concave hull by slices method. CloudCompare, an open-source three-dimensional (3D) point cloud and mesh processing software package, was used with VLS data to segment individual trees from which single tree crowns were extracted by identifying the first branch point of the tree. The slice thickness and number to be fitted to the canopy point cloud were adaptively determined based on the change rate in area with height, with the area of each slice calculated using the concave hull algorithm with portions of the crown regarded as truncated cones. The overall volume was then calculated as the sum of all sub-volumes. The proposed method was experimentally validated on 30 urban trees by comparing the crown volumes calculated using the proposed method with those calculated using five existing methods (manual measurement, 3D convex hull, 3D alpha shape, convex hull by slices, and voxel-based). The proposed method produced the smallest average crown volume. Gaps and holes in the point cloud were regarded as part of the crown by the manual measurement, 3D convex hull, and convex hull by slices method, resulting in the calculated volume being higher than the true value; the proposed method reduced this effect. These results indicate that the concave hull by slices method can more effectively calculate the crown volume of a single tree from VLS data.
Objective Estimation of Tropical Cyclone Intensity from Active and Passive Microwave Remote Sensing Observations in the Northwestern Pacific Ocean
Authors: Xiang Kunsheng , Yang Xiaofeng , Zhang Miao , Li Ziwei , Kong Fanping
Published: March 2019

A method of estimating tropical cyclone (TC) intensity based on Haiyang-2A (HY-2A) scatterometer, and Special Sensor Microwave Imager and Sounder (SSMIS) observations over the northwestern Pacific Ocean is presented in this paper. Totally, 119 TCs from the 2012 to 2017 typhoon seasons were selected, based on satellite-observed data and China Meteorological Administration (CMA) TC best track data. We investigated the relationship among the TC maximum-sustained wind (MSW), the microwave brightness temperature (TB), and the sea surface wind speed (SSW). Then, a TC intensity estimation model was developed, based on a multivariate linear regression using the training data of 96 TCs. Finally, the proposed method was validated using testing data from 23 other TCs, and its root mean square error (RMSE), mean absolute error (MAE), and bias were 5.94 m/s, 4.62 m/s, and −0.43 m/s, respectively.
Detection of Triacetone Triperoxide (TATP) Precursors with an Array of Sensors Based on MoS2/RGO Composites
Authors: Sun Qihua , Wu Zhaofeng , Duan Haiming , Jia Dianzeng
Published: March 2019

Triacetone triperoxide (TATP) is a self-made explosive synthesized from the commonly used chemical acetone (C3H6O) and hydrogen peroxide (H2O2). As C3H6O and H2O2 are the precursors of TATP, their detection is very important due to the high risk of the presence of TATP. In order to detect the precursors of TATP effectively, hierarchical molybdenum disulfide/reduced graphene oxide (MoS2/RGO) composites were synthesized by a hydrothermal method, using two-dimensional reduced graphene oxide (RGO) as template. The effects of the ratio of RGO to raw materials for the synthesis of MoS2 on the morphology, structure, and gas sensing properties of the MoS2/RGO composites were studied. It was found that after optimization, the response to 50 ppm of H2O2 vapor was increased from 29.0% to 373.1%, achieving an increase of about 12 times. Meanwhile, all three sensors based on MoS2/RGO composites exhibited excellent anti-interference performance to ozone with strong oxidation. Furthermore, three sensors based on MoS2/RGO composites were fabricated into a simple sensor array, realizing discriminative detection of three target analytes in 14.5 s at room temperature. This work shows that the synergistic effect between two-dimensional RGO and MoS2 provides new possibilities for the development of high performance sensors.
Assisting Visually Impaired People in the Public Transport System through RF-Communication and Embedded Systems †
Authors: Sáez Yessica , Muñoz José , Canto Francisco , García Antony , Montes Héctor
Published: March 2019

For a significant number of people with visual impairments, public transport plays an important role in productivity, community participation, and independence, since it may be the only feasible mobility option to participate in their education, work, medical care, food, and to attend many other places in their community. To use the public bus system safely, effectively, and autonomously, these people need to collect information about their physical environment and visible information at stops and terminals, such as timetables, routes, etc. Unfortunately, most people who are blind or visually impaired experience difficulties in getting on the right bus or getting off at the right destination. These situations usually force them to depend on other people that assist them in activities close to their homes, or settle for simpler jobs, or simply stay at home. Therefore, our efforts should aim to develop a system where technology is used to empower people with visual disabilities, allowing them to navigate autonomously in the public transport system. This paper presents a system based on radio frequency (RF) communication proposed within the framework of the MOVIDIS (Mobility for Visually Disabled People) research project (funded by the National Secretariat of Science, Technology and Innovation-SENACYT, under Grants No. 109-2015-4-FID14-073 and No. 99-2018-4-FID17-031), which provides an alternative to assist people with visual disabilities with their mobility in the public transport system. The various modules of this system communicate with each other by means of radio frequency and allow users to interact with buses and their respective stops. The first experimental results show that RF communication represents a viable option to help people with visual disabilities in public transport services.
Advanced Micro- and Nano-Gas Sensor Technology: A Review
Authors: Nazemi Haleh , Joseph Aashish , Park Jaewoo , Emadi Arezoo
Published: March 2019

Micro- and nano-sensors lie at the heart of critical innovation in fields ranging from medical to environmental sciences. In recent years, there has been a significant improvement in sensor design along with the advances in micro- and nano-fabrication technology and the use of newly designed materials, leading to the development of high-performance gas sensors. Advanced micro- and nano-fabrication technology enables miniaturization of these sensors into micro-sized gas sensor arrays while maintaining the sensing performance. These capabilities facilitate the development of miniaturized integrated gas sensor arrays that enhance both sensor sensitivity and selectivity towards various analytes. In the past, several micro- and nano-gas sensors have been proposed and investigated where each type of sensor exhibits various advantages and limitations in sensing resolution, operating power, response, and recovery time. This paper presents an overview of the recent progress made in a wide range of gas-sensing technology. The sensing functionalizing materials, the advanced micro-machining fabrication methods, as well as their constraints on the sensor design, are discussed. The sensors’ working mechanisms and their structures and configurations are reviewed. Finally, the future development outlook and the potential applications made feasible by each category of the sensors are discussed.
Electrical Properties of Two-Dimensional Materials Used in Gas Sensors
Authors: Vargas-Bernal Rafael
Published: March 2019

In the search for gas sensing materials, two-dimensional materials offer the possibility of designing sensors capable of tuning the electronic band structure by controlling their thickness, quantity of dopants, alloying between different materials, vertical stacking, and the presence of gases. Through materials engineering it is feasible to study the electrical properties of two-dimensional materials which are directly related to their crystalline structure, first Brillouin zone, and dispersion energy, the latter estimated through the tight-binding model. A review of the electrical properties directly related to the crystalline structure of these materials is made in this article for the two-dimensional materials used in the design of gas sensors. It was found that most 2D sensing materials have a hexagonal crystalline structure, although some materials have monoclinic, orthorhombic and triclinic structures. Through the simulation of the mathematical models of the dispersion energy, two-dimensional and three-dimensional electronic band structures were predicted for graphene, hexagonal boron nitride (h-BN) and silicene, which must be known before designing a gas sensor.
Purchase and Use of New Technologies among Young People: Guidelines for Sustainable Consumption Education
Authors: Calafell Genina , Banqué Neus , Viciana Salvador
Published: March 2019

Traditional consumer education (CE), aimed at providing information and guidance to young people, has become insufficient to take on the challenges posed by the Sustainable Development Goals (SDGs), specifically SDG 12. Knowledge of youth’s habits as consumers today and citizens of the future becomes essential for defining the most suitable methodological contents and strategies for effective and sustainable CE. This premise was the inception for our research project on the consumption of young people, focusing on the acquisition, purchase, and use of new technologies. Data were obtained from a sample of 994 young people who participated in activities at the Consumption School of Catalonia and completed a questionnaire. The main results revealed that young people did not include sustainability criteria in their use or purchase of technological devices, especially mobile phones: the replacement rate for mobiles was very high (1, 2, or 3 years) and the most important purchase criteria were price, technical features, and brand. These results highlight the need to propose a new kind of CE that challenges the young to think about and adopt consumption methods adopting a contextual, constructive, and complex perspective.
Urban Sustainable Development Based on the Framework of Sponge City: 71 Case Studies in China
Authors: Zhang Chaohui , He Mingyu , Zhang Yishan
Published: March 2019

Sponge city is a new urban stormwater management strategy proposed in China, which enables the city to absorb and save stormwater like a sponge, then release stormwater to solve the problems of urban waterlogging and water shortage. However, at present, sponge cities are confronted with such problems as high management cost and low management efficiency, a lack of research on collaborative management between cities and the feasibility of regional cooperation between sponge cities needs to be proved. Therefore, this article puts forward the theory of sponge city regional ecological cooperative management and builds a multivariate cluster analysis model of sponge city and conducts an empirical study on data of 71 Chinese cities. The research results show that under the multi-index linkage system, China’s urban climate and ecological characteristics do have the characteristics of regional agglomeration and the basic conditions of interregional ecological cooperation, which proves the feasibility of the hypothesis of regional cooperation. Therefore, strengthening the ecological cooperation of sponge cities among regional cities is conducive to improving the supply efficiency of ecological environment quality and realizing the sustainable development of cities.
Life Stage-Specific Hydropeaking Flow Rules
Authors: Hayes Daniel , Moreira Miguel , Boavida Isabel , Haslauer Melanie , Unfer Günther , Zeiringer Bernhard , Greimel Franz , Auer Stefan , Ferreira Teresa , Schmutz Stefan
Published: March 2019

Peak-operating hydropower plants are usually the energy grid’s backbone by providing flexible energy production. At the same time, hydropeaking operations are considered one of the most adverse impacts on rivers, whereby aquatic organisms and their life-history stages can be affected in many ways. Therefore, we propose specific seasonal regulations to protect ecologically sensitive life cycle stages. By reviewing hydropeaking literature, we establish a framework for hydrological mitigation based on life-history stages of salmonid fish and their relationship with key parameters of the hydrograph. During migration and spawning, flows should be kept relatively stable, and a flow cap should be implemented to prevent the dewatering of spawning grounds during intragravel life stages. While eggs may be comparably tolerant to dewatering, post-hatch stages are very vulnerable, which calls for minimizing or eliminating the duration of drawdown situations and providing adequate minimum flows. Especially emerging fry are extremely sensitive to flow fluctuations. As fish then grow in size, they become less vulnerable. Therefore, an ‘emergence window’, where stringent thresholds on ramping rates are enforced, is proposed. Furthermore, time of day, morphology, and temperature changes must be considered as they may interact with hydropeaking. We conclude that the presented mitigation framework can aid the environmental enhancement of hydropeaking rivers while maintaining flexible energy production.
Can There be Water Scarcity with Abundance of Water? Analyzing Water Stress during a Severe Drought in Finland
Authors: Ahopelto Lauri , Veijalainen Noora , Guillaume Joseph H. A. , Keskinen Marko , Marttunen Mika , Varis Olli
Published: March 2019

Severe droughts can affect water security even in countries with ample water resources. In addition, droughts are estimated to become more frequent in several regions due to changing climate. Drought affects many socio-economic sectors (e.g., agriculture, water supply, and industry), as it did in 2018 in Finland. Understanding the basin-wide picture is crucial in drought management planning. To identify vulnerable and water stressed areas in Finland, a water use-to-availability analysis was executed with a reference drought. Water stress was analyzed with the Water Depletion Index WDI. The analysis was executed using national water permits and databases. To represent a severe but realistic drought event, we modelled discharges and runoffs from the worst drought of the last century in Finland (1939–1942). The potential for performing similar analyses in data scarce contexts was also tested using estimates from global models as a screening tool. The results show that the South and Southwest of Finland would have problems with water availability during a severe drought. The most vulnerable areas would benefit from drought mitigation measures and management plans. These measures could be incorporated into the EU River Basin Management Plans.
Do Firm and Entrepreneur Characteristics Play a Role in SMEs’ Sustainable Growth in a Middle-Income Economy like Côte d’Ivoire?
Authors: Diabate Ardjouman , Allate Brou Mathias , Wei Dongping , Yu Liying
Published: March 2019

Globally, small- and medium-sized enterprises (SMEs) play a key role in driving sustainable economic growth in both developed and developing countries. The main objective of this study was to investigate the firm and entrepreneur characteristics influencing the growth of SMEs in Côte d’Ivoire, with special insight into why this country has been a middle-income economy for decades despite its numerous economicpotentialities. Through IBM SPSS version 22.0, 19 hypotheses were tested using data from 160 SMEs operating in Côte d’Ivoire. The results from chi-square tests revealed an association between each of the ‘firm and entrepreneur characteristics’ and at least one of the three growth measurements. However, it was found thatkey factors such as ‘entrepreneur’s ‘age’, ‘work experience’ and ‘level of education’ do not play a role in SMEs’ sustainable growth in Côte d’Ivoire. Results from the binomial logistic regression confirmed that ‘ability to avoid reporting loss’ can be predicted based on ‘entrepreneur’s work experience’, ‘business sector’ and ‘source of funding’. Although this study has practical significance in the business sphere, its results may be of particular help to governments and policymakers in middle-income economies like Côte d’Ivoire for policy formulation and development of frameworks to enhance SMEs’ sustainable growth.
What Dimension of CSR Matters to Organizational Resilience? Evidence from China
Authors: Lv Wendong , Wei Yuan , Li Xiaoyun , Lin Lin
Published: March 2019

Prior work on corporate social responsibility (CSR) has focused mainly on its effects on the short-term performance of firms from developed countries. In this article, we shed light on its effects on organizational resilience, which is defined as the firm’s ability to positively cope with environmental turbulence, and operationalized by long-term, improved sales growth and financial volatility. In line with this operationalization, we adopt CSR’s performance-enhancing and performance-insuring mechanisms to disentangle the relationship between CSR and organizational resilience. Furthermore, we divide CSR into five dimensions, namely shareholder, employee, business, society and environment-related CSR, and respectively examine their impacts on organizational resilience. The empirical study on a large sample of public firms in China from 2010 to 2017 shows that CSR as a whole significantly increases the firms’ long-term growth and reduces their financial volatility. As for the five specific dimensions, they all have a significant negative effect on financial volatility, and the employee, business, environment-related CSR are positively associated with long-term growth. Yet, the empirical results did not indicate significant associations between shareholder and society-related CSR and firms’ long-term growth. This study first explores the impacts of CSR’s different dimensions on organizational resilience. Also, we contribute to enriching the literature on CSR by examining the long-term performance-insuring effect of CSR with a quantitative analysis of emerging markets. Finally, we discuss some important managerial implications, as well as promising directions for future research.
Towards Recognising Individual Behaviours from Pervasive Mobile Datasets in Urban Spaces
Authors: Klimek Radosław
Published: March 2019

Mobile phone network data, routinely collected by its providers, possess very valuable encoded information about human behaviors. Intensive tourist activities in urban spaces bring smartness via mobile phone fingerprints into the understanding of an urban ecosystem. Due to the diverse processes that govern mobile communication, mining the geolocations of individuals seems to be non-trivial, tedious, and even irregular, which can lead to an incomplete trajectory. Enriching trajectories with infrastructural facilities is another challenge. We provide a unified approach, comprised of both informal and formal elements, to obtain a common framework, which maps pervasive datasets into a collection of individual patterns in urban spaces, to obtain context-enhanced trajectory reconstructions. Through the algorithmization of the approach, we acquire a study that provides new insights on individual and anonymized tourist behaviors. In order to obtain individual behaviors, it is necessary to carry out an arduous extraction process. We propose a multi-agent system architecture and predefined message streams, which are transported on a message-broker platform. We also propose all of the basic algorithms that compose the prototype of the entire multi-agent system. All algorithms were formally analyzed due to termination and time complexity. System evaluation, together with a few basic experiments, was also carried out. The performance evaluation results authenticate system feasibility, credibility, and vitality. Those factors prove its effectiveness and the possibility to build the target system, whilst supporting every urban ecosystem. The system would also strongly influence municipal services to understand urban context and operate more effectively in order to support tourist activities to become safer and more comfortable.
How to Effectively Enhance Sustainable Livelihoods in Smallholder Systems: A Comparative Study from Western Kenya
Authors: Fuchs Lisa Elena , Orero Levi , Namoi Nictor , Neufeldt Henry
Published: March 2019

Increasing communities’ adaptive capacity is crucial to enhancing the sustainability of livelihoods and landscapes in smallholder systems. This study evaluates the contributions of an asset-based community-driven local development project, which has an objective to enhance farmer livelihoods through context-specific agricultural and agroforestry training, in line with farmers’ identities, interests, and preferences. The project was implemented in two areas of the wider Nyando river basin: the Lower and Middle Nyando sites. The project effects on farmer livelihoods were evaluated by analyzing overall income enhancement through the adoption of climate-smart agricultural practices via the computation of total values of harvest. Socioeconomic data from 183 households, half of which were involved in the project, were considered. The findings showed that locality played an important role in the adoption and success of good agricultural practices. Additional significant positive factors included project participation, size of land operated, horticulture farming, livestock ownership, ownership of a title deed, hours worked, and crop species richness. The number of years farmed had a significant negative correlation with the value of harvest. Considering the stark differences in livelihood effects in both sites, researchers conclude that external support for climate-smart agriculture uptake needs to be considerate of, and respond to, biophysical and socioeconomic context.
A Professional Competences’ Diagnosis in Education for Sustainability: A Case Study from the Standpoint of the Education Guidance Service (EGS) in the Spanish Context
Authors: Poza-Vilches Fátima , López-Alcarria Abigail , Mazuecos-Ciarra Nerea
Published: March 2019

Currently, all members of the educational community have a relevant role in the development of professional competences on the sustainability of students. This is supported by the findings obtained by different research studies carried out in different countries and which show the need to characterize and evaluate the practice of EGS as key agents in the training and counseling of teachers on sustainability topics, which, in turn, is the goal of this study. To address this, we have conducted an exploratory study based on the case study of EGS members in the metropolitan area of Granada (Spain) that has helped us to profile the professional practice of its members in the development of professional competences in Education for Sustainable Development (ESD). Answers to a questionnaire provided by 43 teachers who are linked to the EGS have been investigated in addition to an interview to six formal members of the EGS. Results evidence that transmit some values over others correlates positively with the type of competences for sustainability that they promote. Therefore, this shows the interrelation of these competencies with the teaching-learning process and, consequently, with the promotion of an education for sustainability. We conclude that counseling on participatory methodologies, working on values, competences, and curricular sustainability, as well as the cross-curricular nature of the content that is imparted, are the most effective ways from which these teacher guidance services can promote the development of professional competences linked to sustainability in schools.
Key Feature Recognition Algorithm of Network Intrusion Signal Based on Neural Network and Support Vector Machine
Authors: Ye Kai
Published: March 2019

When identifying the key features of the network intrusion signal based on the GA-RBF algorithm (using the genetic algorithm to optimize the radial basis) to identify the key features of the network intrusion signal, the pre-processing process of the network intrusion signal data is neglected, resulting in an increase in network signal data noise, reducing the accuracy of key feature recognition. Therefore, a key feature recognition algorithm for network intrusion signals based on neural network and support vector machine is proposed. The principal component neural network (PCNN) is used to extract the characteristics of the network intrusion signal and the support vector machine multi-classifier is constructed. The feature extraction result is input into the support vector machine classifier. Combined with PCNN and SVM (Support Vector Machine) algorithms, the key features of network intrusion signals are identified. The experimental results show that the algorithm has the advantages of high precision, low false positive rate and the recognition time of key features of R2L (it is a common way of network intrusion attack) data set is only 3.18 ms.
Generation and Characterization of Anti-Filovirus Nucleoprotein Monoclonal Antibodies
Authors: Rahim Md Niaz , Wang Min , Wang Tong , He Shihua , Griffin Bryan D. , Kobasa Darwyn , Yang Ruifu , Du Zongmin , Qiu Xiangguo
Published: March 2019

Filoviruses cause lethal hemorrhagic fever in humans. The filovirus nucleoprotein (NP) is expressed in high abundance in infected cells and is essential for virus replication. To generate anti-filovirus monoclonal antibodies (mAbs) against the NP, mice were immunized with peptides known as B-cell epitopes corresponding to different filovirus NPs, and hybridomas were screened using FLAG-tagged filovirus NP constructs. Numerous mAbs were identified, isotyped, and characterized. The anti-NP mAbs demonstrated different ranges of binding affinities to various filovirus NPs. Most of the clones specifically detected both recombinant and wild-type NPs from different filoviruses, including Ebola (EBOV), Sudan (SUDV), Bundibugyo (BDBV), Marburg (MARV), Tai Forest (TAFV), and Reston (RESTV) viruses in western blot analysis. The mAbs were also able to detect native NPs within the cytoplasm of infected cells by immunofluorescence confocal microscopy. Thus, this panel of mAbs represents an important set of tools that may be potentially useful for diagnosing filovirus infection, characterizing virus replication, and detecting NP–host protein interactions.
Enhanced Autophagy Contributes to Reduced Viral Infection in Black Flying Fox Cells
Authors: Laing Eric D. , Sterling Spencer L. , Weir Dawn L. , Beauregard Chelsi R. , Smith Ina L. , Larsen Sasha E. , Wang Lin-Fa , Snow Andrew L. , Schaefer Brian C. , Broder Christopher C.
Published: March 2019

Bats are increasingly implicated as hosts of highly pathogenic viruses. The underlying virus–host interactions and cellular mechanisms that promote co-existence remain ill-defined, but physiological traits such as flight and longevity are proposed to drive these adaptations. Autophagy is a cellular homeostatic process that regulates ageing, metabolism, and intrinsic immune defense. We quantified basal and stimulated autophagic responses in black flying fox cells, and demonstrated that although black flying fox cells are susceptible to Australian bat lyssavirus (ABLV) infection, viral replication is dampened in these bat cells. Black flying fox cells tolerated prolonged ABLV infection with less cell death relative to comparable human cells, suggesting post-entry mechanisms interference with virus replication. An elevated basal autophagic level was observed and autophagy was induced in response to high virus doses. Pharmacological stimulation of the autophagy pathway reduced virus replication, indicating autophagy acts as an anti-viral mechanism. Enhancement of basal and virus-induced autophagy in bat cells connects related reports that long-lived species possess homeostatic processes that dampen oxidative stress and macromolecule damage. Exemplifying the potential that evolved cellular homeostatic adaptations like autophagy may secondarily act as anti-viral mechanisms, enabling bats to serve as natural hosts to an assortment of pathogenic viruses. Furthermore, our data suggest autophagy-inducing drugs may provide a novel therapeutic strategy for combating lyssavirus infection.
Airborne Transmission of a Serotype 4 Fowl Adenovirus in Chickens
Authors: Li Gang , Yu Guanliu , Niu Yujuan , Cai Yumei , Liu Sidang
Published: March 2019

Serotype 4 fowl adenovirus (FAdV-4) is the main pathogen for hydropericardium syndrome (HPS) in chickens. It has caused major economic losses in the global poultry industry. Currently, FAdV-4′s transmission routes in chickens remain unclear. Here we investigate the airborne transmission routes of FAdV-4 in chickens. A total of 45 ten-day-old chickens were equally divided into three groups (infected group/isolator A, airborne group/isolator B, and control group/isolator C). Of note, isolators A and B were connected by a leak-free pipe. The results showed that the virus could form a viral aerosol, detected in isolators two days post infection (dpi). The viral aerosol reached a peak at 4 dpi in the infected group. Healthy chickens in the airborne group were infected by the virus at 8 dpi. The chickens of the airborne group demonstrated subclinical symptoms capable of shedding the virus for some time. This finding suggests that FAdV-4 can be efficiently transmitted among chickens by aerosol transmission. These findings have significant implications for developing strategies to control this infectious disease epidemic.
Comment on “Effectiveness of a Group B outer membrane vesicle meningococcal vaccine in preventing hospitalization from gonorrhea in New Zealand: a retrospective cohort study, Vaccines, 2019, 1, 5; doi:10.3390/vaccines7010005”
Authors: Kenyon Chris
Published: March 2019

Available evidence suggests MeNZB™ is not associated with a durable effect against N. gonorrhoeae.
The Effect of Stimulus Area on Global Motion Thresholds in Children and Adults
Authors: Meier Kimberly , Giaschi Deborah
Published: March 2019

Performance on random-dot global motion tasks may reach adult-like levels before 4 or as late as 16 years of age, depending on the specific parameters used to create the stimuli. Later maturation has been found for slower speeds, smaller spatial displacements, and sparser dot arrays. This protracted development on global motion tasks may depend on limitations specific to spatial aspects of a motion stimulus rather than to motion mechanisms per se. The current study investigated the impact of varying stimulus area (9, 36, and 81 deg2) on the global motion coherence thresholds of children 4–6 years old and adults for three signal dot displacements (∆x = 1, 5, and 30 arcmin). We aimed to determine whether children could achieve mature performance for the smallest displacements, a condition previously found to show late maturation, when a larger stimulus area was used. Coherence thresholds were higher in children compared to adults in the 1 and 5 arcmin displacement conditions, as reported previously, and this did not change as a function of stimulus area. However, both children and adults performed better with a larger stimulus area in the 30 arcmin displacement condition only. This suggests that immature spatial integration, as measured by stimulus area, cannot account for immaturities in global motion perception.
Experimental Evaluation of Conservation Agriculture with Drip Irrigation for Water Productivity in Sub-Saharan Africa
Authors: Assefa Tewodros , Jha Manoj , Reyes Manuel , Tilahun Seifu , Worqlul Abeyou W.
Published: March 2019

A field-scale experimental study was conducted in Sub-Saharan Africa (Ethiopia and Ghana) to examine the effects of conservation agriculture (CA) with drip irrigation system on water productivity in vegetable home gardens. CA here refers to minimum soil disturbance (no-till), year-round organic mulch cover, and diverse cropping in the rotation. A total of 28 farmers (13 farmers in Ethiopia and 15 farmers in Ghana) participated in this experiment. The experimental setup was a paired ‘t’ design on a 100 m2 plot; where half of the plot was assigned to CA and the other half to conventional tillage (CT), both under drip irrigation system. Irrigation water use and crop yield were monitored for three seasons in Ethiopia and one season in Ghana for vegetable production including garlic, onion, cabbage, tomato, and sweet potato. Irrigation water use was substantially lower under CA, 18% to 45.6%, with a substantial increase in crop yields, 9% to about two-fold, when compared with CT practice for the various vegetables. Crop yields and irrigation water uses were combined into one metric, water productivity, for the statistical analysis on the effect of CA with drip irrigation system. One-tailed paired ‘t’ test statistical analysis was used to examine if the mean water productivity in CA is higher than that of CT. Water productivity was found to be significantly improved (α = 0.05) under the CA practice; 100%, 120%, 222%, 33%, and 49% for garlic, onion, tomato, cabbage, and sweet potato respectively. This could be due to the improvement of soil quality and structure due to CA practice, adding nutrients to the soil and sticking soil particles together (increase soil aggregates). Irrigation water productivity for tomato under CA (5.17 kg m−3 in CA as compared to 1.61 kg m−3 in CT) is found to be highest when compared to water productivity for the other vegetables. The mulch cover provided protection for the tomatoes from direct contact with the soil and minimized the chances of soil-borne diseases. Adapting to CA practices with drip irrigation in vegetable home gardens is, therefore, a feasible strategy to improve water use efficiency, and to intensify crop yield, which directly contributes towards the sustainability of livelihoods of smallholder farmers in the region.
Ortaokul Öğretmenlerinin Destekleme ve Yetiştirme Kurslarına Yönelik Tutumlarının İncelenmesi
Authors: AKÜZÜM Cemal , SARAÇOĞLU Mehtap
Published: March 2019

Bu
araştırma, resmi devlet ortaokullarında görev yapan öğretmenlerin Destekleme ve
Yetiştirme Kurslarına ilişkin görüşlerini ortaya koymaya yönelik bir
çalışmadır. Araştırmanın evrenini, Diyarbakır ili merkez ilçelerinde (Bağlar,
Kayapınar, Sur, Yenişehir) bulunan 381 ortaokulda görev yapan 4081 öğretmen
oluşturmaktadır. Örneklemini ise, araştırmanın desenine uygun olarak,
ortaokullarda görev yapan öğretmenler arasından amaçlı örnekleme yöntemlerinden
olan “ölçüt örnekleme” yöntemi ile seçilen 536 öğretmen oluşturmaktadır.  Öğretmenlerin destekleme ve yetiştirme kurslarına
ilişkin görüşleri, araştırmacılar tarafından geliştirilen 3 faktör ve 22
maddeden oluşan “Destekleme ve Yetiştirme Kurslarına Yönelik Tutum Ölçeği”
kullanılarak alınmıştır. Çalışmadan elde edilen veriler SPSS ve AMOS paket
programları aracılığı ile analiz edilmiştir. Araştırma bulguları; öğretmenlerin
destekleme ve yetiştirme kurslarına yönelik tutumlarının en yüksek düzeyde
olduğu boyutun, bu kursların akademik yönden hem öğrencilere hem de
öğretmenlere sağladığı katkılar yönünde olduğunu göstermektedir. Buna karşılık,
kurslara katılımın özel bir zaman ayırmayı gerektirmesinin ortaya çıkardığı
sosyal yaşama olan etkileri boyutunun en düşük düzeydeki tutumları yansıttığı
da görülmektedir. Branş değişkenine göre; Türkçe, Matematik, Fen Bilimleri, Sosyal
Bilgiler ve Yabancı Dil branşlarındaki öğretmenlerin, Diğer branşındaki
öğretmenlere nazaran destekleme ve yetiştirme kurslarının akademik katkısına
ilişkin tutumlarının daha yüksek olduğu görülmüştür.