bluuebunny/crossref_metadata_2025 huggingface dataset:
THE INVESTIGATION OF VIBRO-ISOLATING FEATURES OF TRANSMISSIONS OF VEHICLES IN ELASTIC CENTRIFUGAL COUPLINGS USING THE METHOD OF IDENTIFICATION OF DYNAMIC PROCESSES IN HALF-COUPLINGS ON THE UNIVERSAL DYNAMIC TEST STAND
Authors: Spruogis Bronislovas , Zubavičius Leonas
Published: February 2019

The presented paper describes the investigation of vibro-isolating features of transmissions of vehicles using universal dynamic test stand. The stand is protected by copyright and distinguishes itself for many advantages in comparison with the existing stands: it is contactless, precise in a wide frequency range, power-saving, high-speed. Due to low exploitation expenses and wide possibilities it is fit for the investigation of dynamic characteristics of various vehicles. On the said stand using the method of the identification of experiment dynamic processes, the investigation of vibroisolating features of rotor systems has been performed. The errors caused by the unevenness of rotation of connecting shafts, the adequacy of the calculated models and the dangerous resonance frequencies have been determined.
THE RESEARCH OF DIESEL INJECTION PUMPS PERFORMANCE ON BIOFUEL WITH DIFFERENT VISCOSITY RATE
Authors: Labeckas Gvidonas , Slavinskas Stasys
Published: February 2019

The main purpose of this research work is to determine the influence of fuel viscosity on the performance of diesel injection pumps of different design in order to clear up some of the changes in fuel feeding when running them in accordance with governor characteristics on the biofuel derived from vegetable oil.

The given fuel temperature/viscosity relationships and dependencies of fuel feeding on its viscosity applying biofi1el on different injection pumps can be practically useful for adjusting them for the work on bio-diesel. According to the analysis of the got results the in-line diesel injection pumps are more suitable for their adaptation for the work on bio-diesel. In this case only small adjustments of biofuel feeding rate are needed.
DAMAGE TO CONCRETE BRIDGES DUE TO REINFORCEMENT CORROSION
Authors: Kamaitis Zenonas
Published: February 2019

The mechanisms of reinforcement corrosion in concrete are the subject of extensive research. Although reliable methods for predicting the corrosive deterioration of concrete structures do not yet exist. This paper describes the durability problem of reinforced concrete bridges based on the mechanisms of carbonation depth or chloride profile. The deterioration model considering concrete carbonation, chloride penetration and concrete cover cracking is adopted to describe the service life of concrete structures. The corrosion models include environmental conditions, concrete carbonation or chloride diffusion rates, quality of concrete cover, steel corrosion rates and many other factors that make the predicting of service life of structures extremely difficult. Finally, the author gives the details of the methods of durabilio/ verification and the proposals for its including in the national standards and practical guides.
MODELLING OF FREIGHT FLOWS THAT CONSIST OF MULTIPLE PRODUCTS TRANSPORTED BY DIFFERENT MODES OF TRANSPORT IN A MULTIMODAL NETWORK
Authors: Vasiliauskas Aidas Vasitis
Published: February 2019

Freight flows which consist of multiple products transported by different modes of transport in a multimodal network get more and more attention in recent years. In this article a model for modelling flows of multiple products in the multimodal network is presented. The multimodal aspect of considered transport system is accounted by the chosen means of network representation. The multiproduct aspect is estimated by the solution procedure which is a GaussSeidel- Linear Approximation Algorithm. The article is closely connected with the following topics:

the representation of the network chosen for the reflection of transportation and transfer operations;

the formulation of a multimode multiproduct model;

the analysis of average and marginal cost functions;

the development of the solution algorithm;

the development of the algorithm used to compute the shortest path.
How Are Galaxies Assigned to Halos? Searching for Assembly Bias in the SDSS Galaxy Clustering
Authors: Vakili Mohammadjavad , Hahn ChangHoon
Published: February 2019

Clustering of dark matter halos has been shown to depend on halo properties beyond mass, such as halo concentration, a phenomenon referred to as halo assembly bias. Standard halo-occupation models (HOD) in large-scale structure studies assume that halo mass alone is sufficient in characterizing the connection between galaxies and halos. Modeling of galaxy clustering can face systematic effects if the number of galaxies within a halo is correlated with other halo properties. Using the Small MultiDark-Planck high-resolution N-body simulation and the clustering measurements of the Sloan Digital Sky Survey DR7 main galaxy sample, we investigate the extent to which the concentration dependence of halo occupation can be constrained. Furthermore, we study how allowing for the concentration dependence can improve our modeling of galaxy clustering. Our constraints on HOD with assembly bias suggest that satellite population is not correlated with halo concentration at fixed halo mass. At fixed halo mass, our constraints favor lack of correlation between the occupation of centrals and halo concentration in the most luminous samples (M
r < −21.5, −21), and modest correlation in the M
r < −20.5, −20, −19.5 samples. We show that, in comparison with abundance-matching mock catalogs, our findings suggest qualitatively similar but modest levels of the impact of halo assembly bias on galaxy clustering. The effect is only present in the central occupation and becomes less significant in brighter galaxy samples. Furthermore, by performing model comparison based on information criteria, we find that in most cases, the standard mass-only HOD model is still favored by the observations.
On the Common Origin of Cosmic Rays across the Ankle and Diffuse Neutrinos at the Highest Energies from Low-luminosity Gamma-Ray Bursts
Authors: Boncioli Denise , Biehl Daniel , Winter Walter
Published: February 2019

We demonstrate that the ultra-high-energy cosmic rays (UHECRs) produced in the nuclear cascade in the jets of low-luminosity gamma-ray bursts (LL-GRBs) can describe the UHECR spectrum and composition, and at the same time, the diffuse neutrino flux at the highest energies. The radiation density in the source simultaneously controls the neutrino production and the development of the nuclear cascade, leading to a flux of nucleons and light nuclei describing even the cosmic-ray ankle at 5 · 1018 eV. The derived source parameters are consistent with population studies, indicating a baryonic loading factor of about 10. Our results motivate the continued experimental search of LL-GRBs as a unique GRB population.
Structural Analogs of the Milky Way Galaxy: Stellar Populations in the Boxy Bulges of NGC 4565 and NGC 5746∗
Authors: Kormendy John , Bender Ralf
Published: February 2019

We present NGC 4565 and NGC 5746 as structural analogs of our Milky Way. All three are giant, SBb–SBbc galaxies with two pseudobulges, i.e., a compact, disky, star-forming pseudobulge embedded in a vertically thick, “red and dead,” boxy pseudobulge that really is a bar seen almost end-on. The stars in the boxy bulge of our Milky Way are old and enhanced in α elements, indicating that star formation finished within ∼1 Gyr of when it started. Here, we present Hobby–Eberly Telescope spectroscopy of the boxy pseudobulges of NGC 4565 and NGC 5746 and show that they also are made of old and α-element-enhanced stars. Evidently it is not rare that the formation of stars that now live in bars finished quickly and early, even in galaxies of intermediate Hubble types whose disks still form stars now. Comparison of structural component parameters leads us to suggest that NGC 4565 and NGC 5746 are suitable analogs of the Milky Way, because they show signatures of similar evolution processes.
Predictions for the First Parker Solar Probe Encounter
Authors: van der Holst B. , IV W. B. Manchester , Klein K. G. , Kasper J. C.
Published: February 2019

We examine Alfvén Wave Solar atmosphere Model (AWSoM) predictions of the first Parker Solar Probe (PSP) encounter. We focus on the 12 day closest approach centered on the first perihelion. AWSoM allows us to interpret the PSP data in the context of coronal heating via Alfvén wave turbulence. The coronal heating and acceleration is addressed via outward-propagating low-frequency Alfvén waves that are partially reflected by Alfvén speed gradients. The nonlinear interaction of these counter-propagating waves results in a turbulent energy cascade. To apportion the wave dissipation to the electron and anisotropic proton temperatures, we employ the results of the theories of linear wave damping and nonlinear stochastic heating as described by Chandran et al. We find that during the first encounter, PSP was in close proximity to the heliospheric current sheet (HCS) and in the slow wind. PSP crossed the HCS two times, at 2018 November 3 UT 01:02 and 2018 November 8 UT 19:09, with perihelion occurring on the south of side of the HCS. We predict the plasma state along the PSP trajectory, which shows a dominant proton parallel temperature causing the plasma to be firehose unstable.
Distribution and diversity patterns of herpetofauna in the Pantabangan-Carranglan Watershed, Nueva Ecija, Caraballo Mountain Range, Philippines
Authors: Gojo Cruz Paul Henric , Afuang Leticia , Gonzalez Juan Carlos , Gruezo William
Published: February 2019

The recent extensive survey conducted in the Pantabangan-Carranglan Watershed, located in the Caraballo Mountain Range during the rainy season (October to November) resulted in the recording of fifty-nine (59) species of amphibians and reptiles (17 frogs, 14 skinks, 3 agamids, 6 gekkonid lizards, 2 varanids and 17 snakes). Out of 59 species, 42 species were Philippine endemics and 25 species are recorded only from the Luzon faunal region. Habitat analysis and mapping showed seven habitat types including lowland dipterocarp forest, grassland, lower montane forest, upper montane forest, pine forest, agricultural areas and riparian habitats.

GIS-based distribution mapping showed that the number of individuals and species are high in forest and associated riparian habitats at mid-elevation (1,000–1,250 m a.s.l.). The distribution pattern in the area is influenced by similarity in microclimatic conditions, availability of resources and niches which species can utilise. Species diversity is centred in mid- to high elevation forest and riparian habitats and in less disturbed areas. Snake diversity is adversely affected by increased disturbance, making them good indicators of the health of an area. The abundance-based Jaccard's Similarity Index showed that connected habitats and elevation gradients have higher species similarity.
Clematis mae (Ranunculaceae), a new species of C. sect. Meclatis from Xinjiang, China
Authors: He Jian , Lyu Ru-Dan , Yao Min , Xie Lei , Yang Zong-Zong
Published: February 2019

Clematismae Z.Z.Yang & L.Xie, a new species of Ranunculaceae from Xinjiang, China, is described and illustrated. The new species is morphologically similar to C.orientalis and C.glauca but can be distinguished for being a less hairy plant (hairy in C.orientalis), often 2-ternate leaves (1–2-pinnate for C.orientalis and C.glauca), lanceolate to linear-lanceolate leaflets (elliptic or ovate in C.glauca), larger flowers (smaller flower in C.orientalis) and narrowly lanceolate sepals with acute to slightly attenuate apex (narrowly oblong sepals in C.orientalis and ovate to broadly lanceolate sepals in C.glauca). The new species is endemic to the southern slope of North Tianshan Mountain in Central Xinjiang. The conservation status of the species is also discussed.
Les droits de l’homme dans les missions de construction de la paix
Authors: Motsch Pascaline
Published: February 2019

La fin de la guerre froide a permis l’entrée des droits de l’homme sur la scène du maintien de la paix. Dans des situations de conflits internes où il fait le constat de violations graves et massives des droits de l’homme, le Conseil de sécurité décide de les protéger et de les promouvoir en espérant que le respect de ces droits tant par les acteurs étatiques que par les acteurs non-étatiques contribuera à la pacification de ces sociétés et, par-delà, au maintien de la paix et de la sécurité internationales. La promotion et la protection des droits de l’homme s’est ainsi imposée comme une mission spécifique des opérations de construction de la paix. L’ensemble des missions de construction de la paix, axées sur la sécurité nationale, le développement économique et la gouvernance démocratique, couvrent matériellement, dans le but de les rendre effectifs, tout le spectre des droits de l’homme internationalement reconnus. Présentement, toutes les opérations de construction de la paix mandatées par le Conseil de sécurité comprennent ainsi une mission spécifique de promotion et de protection des droits de l’homme, selon la formule consacrée, mise en œuvre sur le terrain par une Division des droits de l’homme. Le but de cette contribution est de mettre en lumière ce que recouvre la mission spécifique de protection et de promotion des droits de l’homme à travers l’étude des activités que mènent les Divisions des droits de l’homme dans le cadre de la MINUK, de la MINUAD, de la MINUSS, de la MINUJUSTH, de la MONUSCO, de la MINUSCA de la MINUSMA et de la MINUL.
La responsabilité du Conseil de sécurité en cas de manquement à la responsabilité de protéger
Authors: Mvé Ella Léandre
Published: February 2019

Cet article s’interroge sur l’existence d’une éventuelle responsabilité du Conseil de sécurité en cas de manquement par un État ou par le Conseil lui-même à la responsabilité de protéger. Il part du principe que cette « responsabilité » du Conseil de sécurité aurait pour fondement la Charte des Nations unies qui lui confère la mission principale de maintenir la paix et la sécurité internationale, et dans le cas spécifique de la responsabilité de protéger, le paragraphe 139 du Document final du Sommet mondial de 2005 qui confère à la société internationale (souvent représentée par le Conseil de sécurité), la responsabilité subsidiaire de protéger les populations lorsque leur État est défaillant. Cette responsabilité du Conseil se manifeste de façon encore ténue à travers les opérations de « réaction » et de « reconstruction ». De manière générale, l’article considère que si la responsabilité du Conseil de sécurité en cas de manquement à la responsabilité de protéger est encore difficile à percevoir, elle est désormais utile à concevoir pour que le Conseil de sécurité ne soit plus une « zone de non droit », un organe qui ne doit et ne peut répondre de ses actes.
Les perspectives générales du référendum d’autodétermination en Nouvelle-Calédonie ?
Authors: Jully Arthur
Published: February 2019

Le référendum d’autodétermination en Nouvelle-Calédonie s’est déroulé le 4 novembre dernier. Ce dernier laisse planer de nombreuses incertitudes sur les perspectives tant institutionnelles et politiques qu’économiques et sociales de cet ensemble d’îles, et de ses relations avec la métropole. Le processus enclenché par l’Accord de Nouméa, phénomène inédit dans notre droit public, interroge au moment où les électeurs viennent de se prononcer sur la question.
Brexit : l’urgence d’un « deal » entre l’Union européenne et le Royaume-Uni
Authors: Petit Yves
Published: February 2019

Le Brexit doit faire l’objet d’un accord de retrait entre l’Union européenne et le Royaume-Uni. Cet accord international se fait attendre et un «  deal  » entre les deux parties devient urgent. Le projet d’accord de retrait est bouclé à 85-90%, mais la question de la frontière entre l’Irlande et l’Irlande du Nord empêche sa conclusion définitive. L’inachèvement de la négociation est également source d’incertitudes quant à la nature de la relation future entre l’Union et le Royaume-Uni et, pour le moment, nul ne sait quel scenario de retrait va se produire.
Trends and Risk Factors in Orthopedic Lawsuits: Analysis of a National Legal Database
Authors: Cichos Kyle H. , Ewing Michael A. , Sheppard Evan D. , Fuchs Christoph , McGwin Gerald , McMurtrie James T. , Watson Shawna L. , Xu Shin , Fryberger Charles , Baker Dustin K. , Crabtree Reaves M. , Murphy Austin B. , Vaughan Loy O. , Perez Jorge L. , Sherrod Brandon A. , Edmonds Brad W. , Ponce Brent A.
Published: February 2019

Orthopedic surgeons frequently encounter medical malpractice claims. The purpose of this study was to assess trends and risk factors in lawsuits brought against orthopedic surgeons using a national legal database. A legal research service was used to search publicly available settlement and verdict reports between 1988 and 2013 by terms “orthopaedic or orthopedic” and “malpractice.” Temporal trends were evaluated, and logistic regression was used to identify independent risk factors for case outcomes. A total of 1562 publicly reported malpractice cases brought against orthopedic surgeons, proceeding to trial during a 26-year period, were analyzed. The plaintiffs won 462 (30%) cases, with a mean award of $1.4 million. The frequency of litigation and pay-outs for plaintiffs increased 215% and 280%, respectively, between the first and last 5-year periods. The mean payout for plaintiff-favorable verdicts was highest in pediatrics ($2.6 million), followed by spine ($1.7 million) and oncology ($1.6 million). Fracture fixation (363 cases), arthroplasty (290 cases), and spine (231 cases) were the most commonly litigated procedures, while plaintiffs were most successful for fasciotomy (48%), infection-treating procedures (43%), and carpal tunnel release (37%). When analyzing data by state and region, adjusted for population, northeastern states had a higher frequency of lawsuits. Malpractice liability has increased during the past 3 decades while orthopedic surgeons continue to win most of the cases making it to court. As patients search for medical care via publicly available information, it is important for orthopedic surgeons to understand what aspects of their own practice carry different risks of litigation. [
Orthopedics
. 2019; 42(2):e260–e267.]
Navigation-Assisted Total Knee Arthroplasty for a Valgus Knee Improves Limb and Femoral Component Alignment
Authors: Lee Sung-Sahn , Kwon Kyeu-Back , Lee Yong-In , Moon Young-Wan
Published: February 2019

The purpose of this study was to evaluate the influence of navigation-assisted surgery on radiographic and clinical outcomes after total knee arthroplasty (TKA) for a valgus knee. The authors identified all patients who underwent TKA for a valgus knee between January 2005 and December 2015. Among 83 conventional TKA cases and 55 navigation-assisted TKA cases, propensity score matching was performed for age, sex, body mass index, and preoperative lower limb mechanical axis. Fifty knees were matched to 50 knees. Each case was evaluated regarding lower limb mechanical axis, mechanical lateral distal femoral angle, medial proximal tibial angle, patellar tilt angle, Western Ontario and McMaster Universities Osteoarthritis Index, Knee Society score, and range of motion. Lower outliers of lower limb mechanical axis (30% vs 8%,
P
=.008) and mechanical lateral distal femoral angle (24% vs 10%,
P
=.046) were found in navigation-assisted TKA. However, outliers of medial proximal tibial angle, Western Ontario and McMaster Universities Osteoarthritis Index, Knee Society score, and range of motion were similar between the 2 different surgical techniques. Navigation-assisted surgery is correlated with fewer outliers of postoperative lower limb alignment and femoral component position but not tibial component position in TKA for preoperative valgus knee. Clinical outcomes for navigation-assisted TKA were not superior to those for conventional TKA. [
Orthopedics
. 2019; 42(2):e253–e259.]
Effect of heating on the oxidative stability of corn oil and soybean oil
Authors: Saeed R. , Naz S.
Published: February 2019

The effects of conventional and microwave heating on the oxidative properties of corn and soybean oil were evaluated. The results showed that acid value, peroxide value, oxidative indices, total oxidation value, and p-anisidine values changed significantly with the rise in temperature (p < 0.05). The peroxide and p-anisidine values for corn oil (PV: 50.670 meqO2/kg, p-AV: 8.248) were greater than soybean oil (PV: 41.694 meqO2/kg, p-AV: 7.566) for conventional heating. The peroxide and p-anisidine values for soybean oil (PV: 6.545 meqO2/kg, p-AV: 76.539) were greater compared to corn oil (PV: 5.074 meqO2/kg, p-AV: 65.360) for microwave heating. The results concluded that microwave heating had a greater impact on the chemical degradation of the fatty acids of the oil. The FT-IR spectra showed peak changes at 3743 cm-1 and 1739 cm-1 and confirmed the rancidity of the oils from microwave heating due to the formation of secondary oxidation products. It was concluded that corn oil showed more oxidative changes compared to soybean oil.
Monitoring Indicators of the Flipped Classroom Learning Process based on Data Mining – Taking the Course of “Virtual Reality Technology” as an Example
Authors: Ji Yang , Han Yu
Published: February 2019

In recent years, due to the superiority of its teaching effect, the flipped classroom has attracted more and more attention from colleges and universities. In the information age, MOOC and micro-lectures have gradually entered the college classroom and become new ways of learning and teaching. Considering the further requirement on the quality of teaching, it is not enough to monitor merely the learning results. Instead, the curriculum reform requires more attention to the learning process. Data mining was combined with MOOC and micro-lectures in this study for the case study of the course of “Virtual Reality Technology”. Academic performance, learning input and learning behavior were selected as the indicators to monitor the process of learning “Virtual Reality Technology’. Relevant data were collected and analyzed. The analysis results were used as the basis to provide ideas and approaches for the implementation of reliable and effective teaching intervention methods in the process of teaching “Virtual Reality Technology”, so as improve the quality of teaching and provide reference for other related courses.
Face-to-face Teaching in the Flipped Classroom Supported by Visualization Tools – Taking the course of “Architectural Design of Housing” as an Example
Authors: Liu Lili
Published: February 2019

Multimedia-based information technology, especially the flipped classroom using micro video technology, has gradually changed the traditional classroom teaching and become a new teaching method to improve teaching quality. The “five-ones” teaching model combines the theory of flipped learning, micro-video theory and learning target cognitive hierarchy. Visualization tools can create real-time, evidence-based, full-participating classrooms, generating a positive effect on classroom teaching reform. Therefore, with the focus on the course of Architectural Design of Housing, a number of students of X-university majoring in civil construction were involved in an experiment of face-to-face teaching in the flipped classroom supported by visualization tools under the “five-ones” teaching model. The results show that face-to-face teaching in the flipped classroom supported by visualization tools under the “five-ones” teaching model has a significant effect on improving the quality of course teaching, but it also puts higher requirements on the teaching environment, teachers’ ability and students’ self-control.
Application of Blending Learning Based on Network Learning Space in Teaching Design of Digital Art
Authors: Wang Jian
Published: February 2019

In traditional face-to-face teaching mode, the teacher plays the leading role in the learning process, while students are in the subordinate status. Such learning mode can be easily interrupted due to the ending of classroom teaching time. To let students keep continuous learning, network learning mode based on information technology emerges. In network learning mode, students have strong learning autonomy, and can arrange learning contents and progress according to their ability and time. However, network learning mode requires students owning strong self-discipline ability to plan and arrange the learning contents and practice. A blending learning mode which can deeply integrate online learning and face-to-face teaching was established on the basis of network learning space, and applied in teaching practice of Digital Art. The results of teaching practice showed that, blending learning has significant effect on improving teaching effect of Digital Art.
Integration of a Computer Device for Learning and Training Situations: The Case of Faculty of Sciences Ben M'sik (FSBM)
Authors: Mohssine Bentaib , Bouzekri Touri , Mohammed Talbi
Published: February 2019

Education and distance education often provide answers to several issues related to the transmission of knowledge, its design and acquisition. However, these virtual learning environments do not meet with the same degree of satisfaction for all users, it is probably im-perative to decide on the methodology of integrating transmission order size ergonomic, aes-thetic, practical, time relating ... all shared a concern, which is the consideration of the student user of these new technologies in order to develop that knowledge or general order of these skills in a specific discipline.
Our research is mainly focused on this problem by providing a hand, a situation analysis based on practical experiences in Morocco, and affecting the integration of new technologies for education and training, and other hand, the presentation of a distance learning platform, bringing in an electronic environment and intelligent stakeholders, namely, trainers, coaches, learners, tutors, and mentors.
Teachers, students and administrative framework are called continually to make and exchange services. To structure the information flow we modeled a significant information system based on ergonomic design university. The product of our work is a computing device, has solved several constraints. We also conducted its assessment by measuring the impact of its use.
The integration of new technologies for education is no longer an alternative; it has become an obligation and even guidance to develop these knowledge-sided. Today we share this work in order to present our experience and outlining the results, and also to examine the tracks that will follow to advance the science of modeling and engineering of learning ergonomics.
Asset Supply Chain Management System-based IoT Technology for Higher Education Institutions
Authors: Kuandee Watjanarat , Nilsook Prachyanun , Wannapiroon Panita
Published: February 2019

The purpose of this research is to design and develop an asset supply chain management system-based IoT technology for Higher Education Institutions (HEIs). Although nowadays there are computer-based asset information management systems, the problem is that such a system cannot immediately monitor the status of the asset. There is some information that is not related to reality, including a lack of asset movement records and information as to the status of each asset, which could lead to the mistake in terms of the working process which is unable to control and monitor a situation. Therefore, this re-search applied the concept of supply chain management (SCM) and IoT tech-nology in order to unsure good governance on the part of HEIs. This research is focused on durable articles and the use of a Near Field Communication (NFC) tag to communicate and exchange information with NFC-compatible smartphones. In this case, it can identify and monitor the asset under considera-tion and also assess associated information from any device. This solution can increase efficiency and value in terms of the organization. Moreover, the design diagram of the system leads to the development of asset supply chain manage-ment system (ASCMS)-based IoT technology for HEIs. The evaluation of the performance of this technology shows that the system operates at a great level, and that ASCMS-based IoT technology for HEIs it can be applied to ensure the good governance of such institutions. In addition, this research can serve the in-ternal organizational administration of Thai HEIs, involving dealing with working processes in line with real-life situations, relating to budget management, organizational working behaviors, and service users’ requirements.  All of these aspects are analyzed based on good governance, including the rules of law, transparency and values.
Fault Diagnosis in the Field of Additive Manufacturing (3D Printing) Using Bayesian Networks
Authors: Bacha Abdelkabir , Sabry Ahmed Haroun , Benhra Jamal
Published: February 2019

In this work, a new approach for fault diagnosis in the field of additive manufacturing (3d printing) using artificial intelligence will be given. This approach is based on the marriage of the Bayesian Networks theory and data acquisition techniques. Bayesian Networks are well known for their ability to infer probabilities and to give decisional support under uncertainty. In order to do so, these probability engines must be constructed and maintained by a big amount of data and information using learning algorithms. This work provides a methodology that uses sensors based data acquisition and processing to construct such networks. Some of these sensors are already available in most of the 3d printers available in the market, while other sensors were additionally embedded in a studied 3d printer in order to enrich the number of observational variables to gain a high level of fault diagnosis accuracy and support.
Extended Study of the Flipped Instruction and Its Usefulness
Authors: Nwosisi Christopher
Published: February 2019

The old-style pattern of instruction has been to allocate students to read textbooks and work on assigned problems outside of school, while listening to lectures and taking exams in class. With the introduction of Flipped instruction or a flipped classroom the students absorb new content online by watching video lectures, usually at home, and what used to be homework is now done in class with teachers offering more tailored direction and communication with students, instead of lecturing. Up to fifty percent of the course content was flipped in this study. Results on six of the courses used will be presented and deliberated on.
Performance Analysis of an Effective Approach to Protect Cloud Systems against Application Layer Based Attacks
Authors: El-Sofany Hosam F. , Abou El-Seoud Samir
Published: February 2019

Cloud computing is a new paradigm for hosting hardware and software resources and provides a web-based services to organizations and consumers. It also provides an easy to use and on-demand access to cloud based computing resources that can be published by easy, minimal administration and with a great efficiency. Services of cloud computing are accessing and sharing through internet connection thus it is open for attacker to attack on its security. Application layer based attacks is one of Distributed Denial of Service attacks (DDoS) that can cause a big problem in cloud security. The main objective of DDoS attacks is to infect computer resources (e.g., software applications, network, CPU, etc.) and make them not working properly for the authorized users. In DDoS, the attacker tries to overload the web-based service with traffic. HTTP and XML-based DDoS attacks are founded under the application layer based category of DoS attacks. This category of attack is focused on particular web applications. The main objective of this research paper is to introduce an effective approach to protect cloud-based systems against application layer based attacks. Complexity analysis, effectiveness and performance evaluations of the presented approach are presented.  The feedbacks of the experimental results were highly promising, for protecting cloud computing systems against both DoS and DDoS attacks. Correlation analysis model is also used to validate the efficiency of the proposed approach.
De la aldea hurdana a la ciudad perdida, notas para una estética de la miseria en Los olvidados de Buñuel
Authors: Herrera Javier
Published: February 2019

El objetivo de este trabajo es demostrar a través de las conexiones que pueden observarse entre Las Hurdes y Los olvidados que Buñuel en esta última asume plenamente una línea estilística propia que Octavio Paz bautizaría como “realismo visionario” y que sería la resultante de la consciente asunción por su parte de unos presupuestos estéticos que hemos dado en llamar “feístas”, fundados en una estética que se complace en la representación de la pobreza, la miseria, la deformidad o – como se repite hasta la saciedad en las críticas mexicanas a Los olvidados – la cochambre, una estética que, sobre todo y fundamentalmente, hunde sus raíces en la tradición artístico-literaria española. Pero esa complacencia tiene su origen en una concepción del cine como un viaje o un peregrinaje hacia el interior de uno mismo y del espectador basado en un profundo sentido de la investigación y de la documentación de la realidad humana tal y como es, sin ningún tipo de interpretaciones y ópticas subjetivas.
La forma del suburbio: imagen surreal e imagen-pulsión en Los olvidados
Authors: Poyato Pedro
Published: February 2019

Los olvidados (Luis Buñuel, 1951) formaliza el grito que emana de una realidad profundamente lacerada circunscrita en este caso al suburbio urbano. Y lo hace, no mostrando esa realidad tal cual es, en su deformidad inmediata, sino descubriendo los dispositivos más adecuados para ponerla en situación de liberar la belleza estética que virtualmente encierra; dispositivos que pasan por la conjugación de imágenes -la imagen surreal y la imagen-pulsión, entre ellas- destinadas a revelar, en su fealdad y crueldad, la verdad que habita en el suburbio que cualquier gran ciudad segrega a su costado. El presente trabajo trata de dar cuenta de estas imágenes trabajadas por Los olvidados, de cómo formalizan la realidad suburbial, pero también de su filiación, de su pertenencia a una iconografía feísta que hunde sus raíces en una rica tradición cultural que va desde Goya hasta Zurbarán o Ribera y pasa por El lazarillo de Tormes, además de por un texto literario del propio Buñuel, Suburbios, que está igualmente en el origen del filme.
Los olvidados y el efecto Pudovkin
Authors: Herranz Amparo Martínez
Published: February 2019

La presentación de Los olvidados en el Festival de Cine de Cannes de 1951 fue un acontecimiento fundamental, que condicionó la trayectoria profesional de Luis Buñuel en los años siguientes y también determinó la evolución de la Historia del Cine posterior. En todos estos hechos desempeñó un papel fundamental el cineasta Vsevolod Pudovkin que, como miembro del Comité soviético invitado al festival, escribió varios comentarios sobre Los olvidados que condicionarían la opinión de la crítica internacional. Sus valoraciones enormemente positivas acerca de este título hicieron cambiar la opinión de algunos miembros muy relevantes de la crítica cinematográfica francesa de izquierdas, que inicialmente había rechazado la película, entre ellos el mismísimo Georges Sadoul. Gracias a esto se recuperó el prestigio de Buñuel como cineasta con personalidad propia, tras el olvido de los años previos.
Pour une géographie du pouvoir
Authors: Raffestin Claude
Published: February 2019

Rééditer Pour une géographie du pouvoir près de quarante ans après sa publication initiale en 1980 constitue une forme de manifeste, tant la réception de ce livre a été contrastée : décrié par ses pairs au moment de sa sortie, reconnu aujourd’hui par Claude Raffestin lui-même comme « hétérodoxe », il s’agit d’un ouvrage qui continue de marquer durablement ses lecteurs. S’il reste d’une actualité si vive aujourd’hui, c’est parce qu’il aurait pu s’intituler Pour une géographie du territoire, notion centrale dans la géographie contemporaine. Il définit en effet la territorialité comme médiation spatiale des rapports sociaux, un apport majeur pour toutes les sciences sociales. Proposant de mettre en avant l’espace d’autonomie qui existe dans la perception et la construction d’une relation de pouvoir, l’ouvrage exprime une géographie engagée qui pose les bases de la géopolitique critique. Par la centralité de son analyse relationnelle, son examen des ressources et des flux, il ouvre des pistes vers une écologie politique alors inédite.
Pratiques de terrain et images sonores dans le bassin du Congo
Authors: Kouvouama Abel
Published: February 2019

Ce que les images sonores donnent à comprendre et à entendre dans la chanson et la musique congolaise de variétés comme matériau de terrain interpelle le chercheur dont la démarche réflexive le pousse à analyser la société dans laquelle il vit avec un effort d’objectivité scientifique, et en ayant conscience que le « terrain scientifique » peut être également celui de l’expérimentation sociale. Les matériaux accumulés ici pour notre séminaire proviennent de la littérature écrite et orale congolaise en langue nationale, le lingala. Ce sont des textes écrits et chantés, en somme des choses écrites et dites qui sont des manières de dire et de faire ; c’est-à-dire, une technique et des arts de vivre au sens foucaldien.
Le terrain comme fiction
Authors: Amselle Jean-Loup
Published: February 2019

Au cours de cet exposé, axé sur l’histoire de l’anthropologie et l’expérience personnelle de l’intervenant, seront abordés successivement les thèmes suivants : le terrain scientifique, l’indigène se rebiffe, le terrain œdipien, le terrain emplumé, la scène primitive.
Ampelomyia, a new genus of Schizomyiina (Diptera: Cecidomyiidae) associated with Vitis (Vitaceae) in the Palaearctic and Nearctic regions, with description of a new species from Japan
Authors: Elsayed Ayman Khamis , Uechi Nami , Yukawa Junichi , Tokuda Makoto
Published: February 2019

A gall midge that induces conical leaf galls on wild Vitis Linnaeus (Vitaceae) species in Japan was previously identified based on the gall shape as the Nearctic Schizomyia viticola (Osten Sacken) (Diptera: Cecidomyiidae: Cecidomyiinae: Asphondyliini: Schizomyiina). In 2016, leaf galls were newly found on cultivated Vitis coignetiae Pulliat ex Planchon cultivar Suzumi-murasaki and the wild V. coignetiae, Vitis flexuosa Thunberg, and Vitis ficifolia Bunge in northern Japan. Morphological studies of the larvae and adults obtained from the galls revealed that they were an undescribed taxon distinct from the Nearctic species and did not belong to any known genera of Schizomyiina. A new genus, Ampelomyia Elsayed and Tokuda, is erected for Ampelomyia conicocoricis Elsayed and Tokuda new species. The new genus can be distinguished from other genera of Schizomyiina by having ventroapical extension on tarsomere I, the larval abdominal segment VIII with a posterodorsal lobe, and dorsally shifted pair of larval pleural papillae. Molecular phylogenetic analysis supports this taxonomic treatment. In addition, we also place three Vitis-associated Nearctic species in the new genus: Ampelomyia viticola (Osten Sacken) new combination, A. vitiscoryloides (Packard) new combination, and A. vitispomum (Osten Sacken) new combination.
Motivations to Study Abroad: A Case Study of the College of Agricultural and Life Sciences Agribusiness Short-Term Study Abroad Program
Authors: Beseli Amber Lynn , Warner Wendy J. , Kirby Barbara M. , Jones David W. W.
Published: February 2019

The purpose of this study was to gain a better understanding of the student participants’
motivations to partake in a short-term study abroad experience. This was an observational case
study of the North Carolina State University College of Agricultural and Life Sciences
Agribusiness Short-Term Study Abroad Program with the 2014 program student participants.
The study explored student participants’ motivations to participate in a short-term study abroad
program. This study found students were motivated to participate in a short-term study abroad
program because of the short-term length aspect, the completion of course credits, and
encouragement from other people, both other students and faculty.
Rate constant and secondary organic aerosol formation from the gas-phase reaction of eugenol with hydroxyl radicals
Authors: Liu Changgeng , Liu Yongchun , Chen Tianzeng , Liu Jun , He Hong
Published: February 2019

Abstract. Methoxyphenols are an important organic component of wood-burning emissions
and considered to be potential precursors of secondary organic aerosol
(SOA). In this work, the rate constant and SOA formation potential for the
OH-initiated reaction of 4-allyl-2-methoxyphenol (eugenol) were investigated
for the first time in an oxidation flow reactor (OFR). The rate constant was
8.01±0.40×10-11 cm3 molecule−1 s−1,
determined by the relative rate method. The SOA yield first increased and
then decreased as a function of OH exposure and was also dependent on
eugenol concentration. The maximum SOA yields (0.11–0.31) obtained at
different eugenol concentrations could be expressed well by a one-product
model. The carbon oxidation state (OSC) increased linearly and
significantly as OH exposure rose, indicating that a high oxidation degree
was achieved for SOA. In addition, the presence of SO2 (0–198 ppbv)
and NO2 (0–109 ppbv) was conducive to increasing SOA yield, for which
the maximum enhancement values were 38.6 % and 19.2 %, respectively. The
N∕C ratio (0.032–0.043) indicated that NO2 participated in the
OH-initiated reaction, subsequently forming organic nitrates. The results
could be helpful for further understanding the SOA formation potential from
the atmospheric oxidation of methoxyphenols and the atmospheric aging process
of smoke plumes from biomass burning emissions.
Non Methane Hydrocarbon (C2–C8) sources and sinks around the
Arabian Peninsula
Authors: Bourtsoukidis Efstratios , Ernle Lisa , Crowley John N. , Lelieveld Jos , Paris Jean-Daniel , Pozzer Andrea , Walter David , Williams Jonathan
Published: February 2019

Abstract. Atmospheric Non Methane Hydrocarbons (NMHC) have been extensively studied around the globe due to their importance to atmospheric chemistry and their utility in emission source and chemical sink identification. This study reports on shipborne NMHC measurements made around the Arabian Peninsula during the AQABA (Air Quality and climate change in the Arabian BAsin) ship campaign. The ship traversed the Mediterranean Sea, the Suez Canal, the Red Sea, the Northern Indian Ocean and the Arabian Gulf, before returning by the same route. This region is one of the largest producers of oil and gas (O&G); yet it is among the least studied. Atmospheric mixing ratios of C2–C8 hydrocarbons ranged from a few ppt in unpolluted regions (Arabian Sea) to several ppb over the Suez Canal and Arabian Gulf where a maximum of 166.5 ppb of alkanes was detected. The ratio between i-pentane and n-pentane was found to be 0.93 ± 0.03 ppb ppb−1 over the Arabian Gulf which is indicative of widespread O&G activities, while it was 1.71 ± 0.06 ppb ppb−1 in the Suez Canal which is a characteristic signature for ship emissions. We provide evidence that international shipping contributes to ambient C3–C8 hydrocarbon concentrations but not to ethane which was not detected in marine traffic exhausts. NMHC relationships with propane differentiated between alkane-rich associated gas and methane-rich non-associated gas through a characteristic enrichment of ethane over propane atmospheric mixing ratios. Utilizing the variability-lifetime relationship, we show that atmospheric chemistry governs the variability of the alkanes only weakly in the source dominated areas of the Arabian Gulf (bAG = 0.16) and along the northern part of Red Sea (bRSN = 0.22), but stronger dependencies are found in unpolluted regions such as the Gulf of Aden (bGA = 0.58) and Mediterranean Sea (bMS = 0.48). NMHC oxidative pair analysis indicated that OH chemistry dominates the oxidation of hydrocarbons in the region but along the Red Sea and the Arabian Gulf the NMHC ratios occasionally provided evidence for chlorine radical chemistry. These results demonstrate the utility of NMHCs as source/sink identification tracers and provide an overview of NMHCs around the Arabian Peninsula.
Trend quality ozone from NPP OMPS: the version 2 processing
Authors: McPeters Richard , Frith Stacey , Kramarova Natalya , Ziemke Jerry , Labow Gordon
Published: February 2019

Abstract. A version 2 processing of data from two ozone monitoring
instruments on Suomi NPP, the OMPS nadir ozone mapper and the OMPS nadir
ozone profiler, has now been completed. The previously released data were
useful for many purposes but were not suitable for use in ozone trend
analysis. In this processing, instrument artifacts have been identified and
corrected, an improved scattered light correction and wavelength registration
have been applied, and soft calibration techniques were implemented to
produce a calibration consistent with data from the series of SBUV/2
instruments. The result is a high-quality ozone time series suitable for
trend analysis. Total column ozone data from the OMPS nadir mapper now agree
with data from the SBUV/2 instrument on NOAA 19 with a zonal average bias of
−0.2 % over the 60∘ S to 60∘ N latitude zone.
Differences are somewhat larger between OMPS nadir profiler and N19 total
column ozone, with an average difference of −1.1 % over the 60∘ S to 60∘ N latitude zone and a residual seasonal variation of about
2 % at latitudes higher than about 50∘. For the profile retrieval,
zonal average ozone in the upper stratosphere (between 2.5 and 4 hPa) agrees
with that from NOAA 19 within ±3 % and an average bias of −1.1 %.
In the lower stratosphere (between 25 and 40 hPa) agreement is within ±3 % with an average bias of +1.1 %. Tropospheric ozone produced by
subtracting stratospheric ozone measured by the OMPS limb profiler from total
column ozone measured by the nadir mapper is consistent with tropospheric
ozone produced by subtracting stratospheric ozone from MLS from total ozone
from the OMI instrument on Aura. The agreement of tropospheric ozone is
within 10 % in most locations.
Mapping trends in woody cover throughout Namibian savanna with MODIS seasonal phenological metrics and field inventory data
Authors: Wingate Vladimir R. , Kuhn Nikolaus J. , Phinn Stuart R. , van der Waal Cornelis
Published: February 2019

Abstract. Woody vegetation is an integral component of savannas. Here, two main change processes alter woody vegetation, namely shrub encroachment and deforestation. Both impact a range of ecosystem services and functions across scales. Accurate estimates of change, including spatial extent, rate and drivers are lacking. This is primarily due to savanna vegetation comprising woody and herbaceous vegetation, each of which exhibit divergent phenological characteristics, and vary importantly in their response to climatic and environmental factors. This study uses phenological metrics derived from the MODIS MOD13Q1 NDVI time-series to model woody cover as a function of field measurements, and to map trends across Namibia. These metrics enhance the contrasting phenological characteristics of woody and herbaceous vegetation, and standardizes their annual response to climatic and environmental factors by integrating short term variation. Trends in woody cover are excellent indicators of shrub encroachment and deforestation. Trend significance was computed using the Mann-Kendall test, while change statistics, including the rate and spatial extent of change were derived using the Theil-Sen slope. Change was evaluated in relation to drivers including land-use, population, biomes and precipitation. An overall decrease in woody cover was identified, with the most pronounced decreases found in urban and densely populated areas. Decreases in woody cover were not homogenously distributed; losses predominated in tropical desert and dry forests, but gains were found across shrub lands.