bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hydrophilization of Polyester Textiles by Nonthermal Plasma
Authors: Azeem Musaddaq , Javed Asif , Morikawa Hideaki , Noman Muhammad Tayyab , Khan Muhammad Qamar , Shahid Muhammad , Wiener Jakub 
Published: November 2019

Abstract
Polyester is a popular class of material used in material engineering. With its 0.4% moisture regain, polyethylene terephthalate (PET) is classified as highly hydrophobic, which originates from its lack of polar groups on its backbone. This study used a parallel-plate nonthermal plasma dielectric barrier discharge system operating at medium pressure in dry air and nitrogen (N2) to alter the surface properties of PET fabrics to increase their hydrophilic capabilities. Water contact angle, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS) were utilized to analyze any effect from the plasma treatment. The wettability analysis revealed a reduction in the contact angle of more than 80% within 5 min for both discharges. Scanning electron microscopy analysis showed no microscopic damage to the fiber structure, guaranteeing that the fabrics’ structural integrity was preserved after treatment. AFM analysis showed an increase in the nanometer roughness, which was considered beneficial because it increased the total surface area, further increasing the hydrophilic capacity. XPS analysis revealed a sharp increase in the presence of polar functional groups, indicating that the induced surface changes are mostly chemical in nature. Comparing that of untreated fabrics to treated fabrics, a Increase in water absorption capacity was observed for air-treated and N2-treated fabrics, when these fabrics were used immediately after plasma exposure.
New 40Ar/39Ar, fission track and sedimentological data on a middle Miocene tuff occurring in the Vienna Basin: Implications for the north-western Central Paratethys region
Authors: Rybár Samuel , Šarinová Katarína , Sant Karin , Kuiper Klaudia F. , Kováčová Marianna , Vojtko Rastislav , Reiser Martin K. , Fordinál Klement , Teodoridis Vasilis , Nováková Petronela , Vlček Tomáš 
Published: November 2019

Abstract
The Kuchyňa tuff is found on the Eastern margin of the Vienna Basin and was formed by felsic volcanism. The Ar/Ar single grain sanidine method was applied and resulted in an age of 15.23±0.04 Ma, which can be interpreted as the age of the eruption. The obtained numerical age is in accordance with the subtropical climate inferred by the presence of fossil leaves that originated in an evergreen broadleaved forest. Furthermore, the described volcanism was connected with the syn-rift stage of the back-arc Pannonian Basin system. The sedimentological data from the underlying sandy mudstones indicate alluvial environment what confirms terrestrial conditions during deposition. Moreover, the tuff deposition probably occurred shortly before the Badenian transgression of the Central Paratethys Sea.
Dichlorvos toxicity: A public health perspective
Authors: Okoroiwu Henshaw Uchechi , Iwara Iwara Arikpo 
Published: November 2019

Abstract
Pesticides are used in agriculture and in domestic pest control. Dichlorvos, an organophosphate, is a predominant pesticide used in domestic insect control in developing countries. Acute and prolonged exposure may lead to death, genotoxic, neurological, reproductive, carcinogenic, immunological, hepatic, renal, respiratory, metabolic, dermal and other systemic effects. Its toxicity is due to the ability of the compound to inhibit acetyl cholinesterase at cholinergic junction of the nervous system. This study is a review of the toxicological effects of dichlorvos in a public health perspective.
Asymmetrical mini disk tools – possibilities of use and directions for further development
Authors: Kotwica Krzysztof 
Published: November 2019

Abstract
The paper presents a new solution of asymmetrical mini disk tools for mining head of roadheader designed for hard and very hard rock mining. In the first part the benefits of disk tools used in TBM's and special tunneling machines were presented. Next part presents the results of works and laboratory tests performed for developing of new solution of asymmetrical mini disk tools. On the basis of these results new mining head equipped with mini disk tools with a complex trajectory was designed. The results of field tests with different constructional and material solutions of asymmetrical mini disk tools were presented. The directions for further development were described.
Vibration analysis of a bucket wheel excavator boom using rayleigh’s damping model
Authors: Popescu Florin Dumitru , Radu Sorin Mihai , Kotwica Krzysztof , Andraș Andrei , Kertesz Brînaș Ildiko , Dinescu Stela 
Published: November 2019

Abstract
For the ERc 1400-30/7 type bucket wheel excavator (BWE) used in various Romanian open pit mines, a virtual model of the boom was constructed in SolidWorks. On this model, the variable in time forces acting during the excavation process were simulated, and the time history analysis (time response) was performed. This dynamic time response analysis was performed for excavation of homogenous material only, considering the damping as being of Rayleigh’s type, where the damping matrix is a linear combination of the mass and stiffness matrices. Based on the conducted analysis, the displacements of the boom during excavation were observed.
Supporting problems at an island mining face in shanxi, China. Case study based on field observation
Authors: Feng Xiaowe 
Published: November 2019

Abstract
In this paper, field observation is conducted in Fujiaao Coal Mine, Linfen city in Shanxi province, China, which is unique because of its island-typed mining layout. Firstly, geology, layout of the coal cutting face, supporting pattern are presented and details are also provided. Then the problems are discussed and analyzed based on existing bolting theories. It finds out the length of the cable bolt is too long, which requires long time to drill boreholes, whilst the effectiveness is limited due to the illogical combination between cable bolt function zone and rock bolt function zone. Also, the face place allocated to rock bolt is very likely to cause line contact between its edge and steel belt, thus the bearing force is tremendously weakened and solely determined by strength of belt. Furthermore, field observation proves the low active supporting effects to roof, thus leading obvious roof sink even without the disturbance of mining activity. Eventually, some solutions are proposed with the intention to improve the situation based on the economic and technical considerations, including bolting in humidity environment, rational cable bolt length, wise choice of face plate, and ways to increase pretension force. The viewpoints and comments of this study can be referred by practitioners in coal mines sharing same difficulties.
Analytical investigations of the accuracy of the small diameter tool-joint tapered thread made by a lathe machining
Authors: Onysko Oleh , Kopei Volodymyr , Medvid Iulia , Panchuk Vitalii , Pituley Lolita , Vryukalo Viktor 
Published: November 2019

Abstract
The drill string consists of connected drill pipes and other elements. The connection is carried out by screwing of the drill string elements with the help of tool-joint tapered thread. The operational characteristics of the drill pipes depend of the manufacture precision of these tool-joints mostly. The accuracy of the thread is regulated by the accuracy of its profile and the accuracy of its pitch diameter value. The accuracy of the tapered thread manufacturing on the lathe in its depending on the values of the geometric parameters of the lathe tool and the values of deviations of its installation relatively to the workpiece axis is investigated. It is proved that for the tapered thread of form VI profile used for connection of drill pipes with the diameter from 30 mm to 44 mm the most influential factor, in relation to the accuracy of the thread profile is the value of the rake angle. Application of the rake angle value up to −5° according to the research data leads to a deviation from the specified profile of 0.3°, which is more than 35% of the declared standard tolerance on deviations from the profile. Also, the influence of the back rake angle value on the value of the deviation from the standard pitch diameter of the thread is proved. It is proved that the magnitude of the tangential displacement of the nose of the cutter relatively to the axis of the thread up to −0.2 mm can cause a deviation of the profile angle of 0.18°, which is 27% of the standard tolerance.
Suppliers and their role in modern enterprise – Case study
Authors: Midor Katarzyna 
Published: November 2019

Abstract
For each company, the process of selecting and evaluating suppliers of both the components needed for production and the implementation of production process is a very important aspect of their business, as the selection of appropriate contractors has an impact on the quality of final product, which is offered to customers. Dynamically changing situation in the company’s environment causes that success is achieved by those companies which implement new solutions and tools in their relations with suppliers. One such solution may include the PN-EN ISO 9001:2015 standard, which requires the organization to evaluate and select suppliers, taking into account their ability to provide a product compliant with the organization’s requirements. This paper presents a proposal to supplement the procedure of supplier qualification in a selected company. Attention was drawn to the fact that it is necessary for the modern organization to have access to database of qualified suppliers, who at the time of arising demand are able to meet the requirements set for them. It is also important for the enterprise to have at least two qualified suppliers for the same component in its database. Such an approach results from the current market requirements. The paper is based on a case study as a recognized method of analyzing and discussing authentic situations applied in management sciences.
¿Para dónde va nuestra Facultad?
Authors: Losada Pérez Fabio 
Published: November 2019

Es común afirmar que la educación del país está en crisis. Numerosos ensayos han sido escritos para mostrar las dificultades que asedian y degradan a nuestras instituciones educativas, y numerosos los congresos que se han hecho para encontrar alternativas coherentes que han de conducirnos a modelos menos conflictivos y más eficaces, pero nunca en los últimos 90 años se había legislado en materia educativa, como se pretende hacer con el proyecto de ley que hoy se encuentra en el Senado, proyecto que está siendo concertado entre el Gobierno y las comunidades comprometidas con la educación en el país.
La importancia de la perspectiva histórica y de los modelos en la enseñanza de la física
Authors: Perea Juan Manuel 
Published: November 2019

Probablemente uno de los grandes vacíos pedagógicos de los programas curriculares de Física, tanto a nivel de educación media como universitaria, es la falta de perspectiva histórica que nos permita relativizar sanamente la concepción de realidad y de verdad.Cuando se piensa o enseña una idea o concepto tomada como una verdad absoluta situada en un determinado momento histórico estamos asumiendo un papel terminal a la ciencia.La ciencia es ante todo un sistema inacabado en permanente elaboración y aniquilación: se construyen nuevas teorías en detrimento de las anteriores que no pueden competir en un poder explicativo (por ejemplo la teoría ondulatoria de la luz de Huygens a cambio de la teoría corpuscular de Newton); con las nuevas teorías nacen nuevos conceptos y surgen nuevas realidades.
Estas nuevas realidades no se refieren desde luego, a los datos perceptuales como tales. Ilustramos esto con el siguiente ejemplo: Hace varios miles de años el cielo en la noche tenía aproximadamente la misma apariencia que la que hoy tiene. En otras palabras, las retinas de nuestros antepasados eran afectadas por lo que hoy llamamos "ondas electromagnéticas’ de la misma forma como son afectadas las nuestras al mirar hacia el cielo en una noche estrellada.
Pero la realidad de nuestros ancestros remotos era bien diferente. Lo que ellos observaban eran las hogueras de los nómadas de la inmensidad, que en la noche, al igual que ellos, dormían alrededor del fuego protector. Poco después esos mismos datos perceptuales eran pequeños huecos en la gran bóveda celeste que dejaban pasar la luz inmensa de Dios. Más tarde fueron inmensas bolas de fuego suspendidas de las grandes esferas de cristal que conformaban un sistema concéntrico en el cual la tierra era el centro. Posteriormente fueron grandes masas in candescentes que gravitaban según las leyes de Kepler. Hoy son la luz de sistemas solares muy lejanos; algunos de ellos extintos hace muchos millones de años. En este sentido, puede decirse incluso, que lo que observamos es el pasado de sistemas solares situados en espacio-tiempos diferentes.
Palabras de apertura doctorado en educación y cultura ambiental – DECA. Resolución MEN 10166 del 26 de junio de 2014
Authors: López Jiménez Nelson Ernesto 
Published: November 2019

SALUDOS A LA DIRECCIÓN DE LA UNIVERSIDAD, A LOS DOCTORAND@S, A LOS ASISTENTES AL ACTO DE INAUGURACIÓN Y UN AGRADECIMIENTO AL DR CARLOS EDUARDO VASCO, por su deferencia al compartir con nosotros sus análisis y reflexiones sobre la formación doctoral en nuestro país.
La historia de las Universidades participantes en este proyecto doctoral, se narra incorporando sucesos ocurridos en un horizonte variopinto que integra desarrollos, avances, frustraciones, alegrías, lagrimas, perdidas, que las constituyen en un proyecto social e histórico que no está concluido, ni se concluirá afortunadamente, la Universidades de la Amazonia, Pamplona, Francisco de Paula y Surcolombiana, son un RETO POR ENFRENTAR Y UN PROCESO POR CONSTRUIR.
Linezolid for the treatment of postneurosurgical infection caused by methicillin-resistant Staphylococcus
Authors: Rebai Lotfi , Fitouhi Nizar , Daghmouri Mohamed Aziz , Bahri Kamel 
Published: November 2019

Background:
Postneurosurgical infection (PNSI) is a major problem. Linezolid is a bacteriostatic oxazolidinone antibiotic with a highly activity against Gram-positive cocci resistant to methicillin and a good cerebrospinal fluid penetration. The purpose of this study is to evaluate the efficacy of linezolid in the treatment of PNSI caused by methicillin-resistant Staphylococcus (MRS).

Methods:
We conducted an observational study for all patients over 14 years old and diagnosed with MRS PNSI. Demographic, clinical, and laboratory information were collected prospectively.

Results:
A total of 10 patients with PNSI (6 meningitis, 2 ventriculitis, and 2 subdural empyema) received linezolid. MRS isolated was Staphylococcus aureus in seven cases and Staphylococcus epidermidis in three cases. All isolated microorganisms were susceptible to vancomycin (minimum inhibitory concentration (MIC) = 2 mg/L) and linezolid (MIC = 1). The rate of microbiologic efficacy was 100% for patients with meningitis or ventriculitis. In the case of subdural empyema, focal infection had improved between 14 and 18 days. No adverse effects occurred during this study.

Conclusion:
Our results suggest that linezolid as an alternative to vancomycin for the treatment of PNSI caused by MRS with a high rate of efficacy.
The use of literacy approach to teach writing of descriptive text at the seventh grade students of SMPN 1 Ngebel
Authors: Yuliani Tanti 
Published: November 2019

The main purpose of teaching learning English in Junior High School to develop the students’ competence and knowledge in four language skills, Speaking, Reading, Listening and Writing. One of the difficult skills is writing. In this research are describe how are the uses, problems, and solutions of the use of Literacy Approach to Teach Writing of Descriptive Text At The Seventh Grade Students of SMPN 1 Ngebel. Literacy approach is one of the approaches used to teach writing especially in descriptive text because Literacy approach is the ability to read and write. There are some step of teaching writing, they are planning, composing, and revising. This research uses descriptive qualitative research. Participant/Informant of the research are the English teacher and the seventh grade students of SMPN I Ngebel Ponorogo. This research uses purposive sampling technique. The techniques which are used to collect the data are observation, interview, and documentation. Techniques of the data analysis are data reduction, data display and drawing conclusions. The result of the analyzing data indicates that the uses of literacy approach in teaching writing of descriptive text are divided into two steps. The first is preparation steps and the second is learning process. The learning process uses literacy approach includes introduce and giving explanation the descriptive text, give the modal of the descriptive text and have text to analyze, make group work to discussion the students’ ideas, give the chance to make students’ own product and also checking the students’ understanding about the material. Besides, the problem of the use literacy approach in writing of descriptive text are sometimes the students are noisy in the classroom and their vocabulary are still low. The students feel afraid to deliver their opinion and ideas in teaching and learning process. The solution of the use literacy approach in writing of descriptive are the students must make group work of the students’ worksheet, Teacher controls the students and gives scores for students.
Non-destructive testing derived parameters for microstructure-based residual service life assessment of aging metallic materials in nuclear engineering
Authors: Acosta Ruth , Boller Christian , Starke Peter , Jamrozy Michael , Knyazeva Marina , Walther Frank , Heckmann Klaus , Sievers Jürgen , Schopf Tim , Weihe Stefan 
Published: November 2019

Abstract
Metallic components in nuclear engineering are exposed to extensive loads such as pressurization and temperature changes which can affect the properties of the material significantly depending on the load spectrum applied. In view of developing a procedure to evaluate the residual service life of metallic components in nuclear power plants aged during service, metastable austenitic steel AISI 347 (German designation: X6CrNiNb18−10) has been considered as an example. To this purpose, total strain-controlled fatigue tests were carried out under different environmental conditions and monitored by continuously measuring thermometric, resistometric, electromagnetic and electrochemical parameters. These parameters provide an information gain in terms of material characterization when compared to conventional strain measurements. Based on these parameters, the short time evaluation procedure StrainLife has been developed, which allows the determination of local S-N curves with a significantly reduced effort as compared with traditional procedures. This method has been implemented into the structural simulation program PROST for the integrity assessment of the components while considering local fatigue properties. This very effective method allows for the determination of local fatigue properties including the strain-specific local scatter of the metallic microstructure properties of the material which has not been possible by traditional means.
Inclusion and microstructure characteristics in steel with TiO2 nanoparticle additions
Authors: Chen Fuhao , Kong Hui , Xu Chen , Shan Mengwei , Qiu Yue , Zhang Jing , Liu Xin 
Published: November 2019

Abstract
TiO2 nanoparticles were directly added to molten steel. The corresponding analyses of inclusion and microstructure were carried out through scanning electron microscopy (SEM) and an energy-dispersive X-ray spectrometer (EDS). On the one hand, a large number of micrometer scale Ti-bearing inclusions were observed. Besides Ti, other elements, such as Al, Mn, Si and S, were present in these inclusions. These phenomena not only confirmed the validity of adding TiO2 nanoparticles but likewise their growth and reactivity. This can be explained by the interaction between TiO2 and a Fe matrix, the decomposition reaction of TiO2 and a higher Gibbs free energy for the nanoparticles. On the other hand, these Ti-bearing inclusions can induce the nucleation of intragranular acicular ferrite. This is similar in appearance to a Ti-bearing inclusion originating through internal precipitation and may be explained by the theory of a Mn-depletion zone.
Connection of discontinuous segments in early functional recovery from thoracic ossification of the posterior longitudinal ligament treated with posterior instrumented surgery
Authors: Ando Kei , Kobayashi Kazuyoshi , Machino Masaaki , Ota Kyotaro , Tanaka Satoshi , Morozumi Masayoshi , Ito Sadayuki , Kanbara Shunsuke , Inoue Taro , Ishiguro Naoki , Imagama Shiro 
Published: November 2019

OBJECTIVEThe objective of this study was to investigate the relationship between morphological changes in thoracic ossification of the posterior longitudinal ligament (T-OPLL) and postoperative neurological recovery after thoracic posterior fusion surgery. Changes of OPLL morphology and postoperative recovery in cases with T-OPLL have not been examined.METHODSIn this prospective study, the authors evaluated data from 44 patients (23 male and 21 female) who underwent posterior decompression and fusion surgery with instrumentation for the treatment of T-OPLL at our hospital. The patients’ mean age at surgery was 50.7 years (range 38–68 years). The minimum duration of follow-up was 2 years. The location of thoracic ossification of the ligamentum flavum (T-OLF), T-OLF at the OPLL level, OPLL morphology, fusion range, estimated blood loss, operative time, pre- and postoperative Japanese Orthopaedic Association (JOA) scores, and JOA recovery rate were investigated. Reconstructed sagittal multislice CT images were obtained before and at 3 and 6 months and 1 and 2 years after surgery. The basic fusion area was 3 vertebrae above and below the OPLL lesion. All parameters were compared between patients with and without continuity across the disc space at the OPLL at 3 and 6 months after surgery.RESULTSThe preoperative morphology of OPLL was discontinuous across the disc space between the rostral and caudal ossification regions on sagittal CT images in all but one of the patients. Postoperatively, these segments became continuous in 42 patients (97.7%; occurring by 6.6 months on average) without progression of OPLL thickness. Patients with continuity at 3 months had significantly lower rates of diabetes mellitus (p < 0.05) and motor palsy in the lower extremities (p < 0.01). The group with continuity also had significantly higher mean postoperative JOA scores at 3 (p < 0.01) and 6 (p < 0.05) months and mean JOA recovery rates at 3 and 6 months (both p < 0.01) after surgery.CONCLUSIONSPreoperatively, discontinuity of rostral and caudal ossified lesions was found on CT in all patients but one of this group of 44 patients who needed surgery for T-OPLL. Rigid fixation with instrumentation may have allowed these segments to connect at the OPLL. Such OPLL continuity at an early stage after surgery may accelerate spinal cord recovery.