bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Case Report of Duodenal Gangliocytic Paraganglioma – Is Duodenopancreatectomy Necessary?
Authors: Valero-Liñán Antonio Serafin , de Llama José Ignacio Miota , Gonzalez-Masiá José Antonio , Stoyanov Toni I. , Conde-Inarejos Belén , Luengo-Ballester Olga , Camacho-Dorado Cristina , Sanchez-Gallego Alba , Aguado-Rodríguez Beatriz , Ivanov Kaloyan T. , Tonchev Pencho T. 
Published: December 2019

Summary
Gangliocytic paraganglioma (GP) is an uncommon finding in the periampullary region of the duodenum. In the Department of General and Digestive Surgery of the Albacete University Hospital Complex, a 45-years-old patient was diagnosed with a 17x13mm hypervascular nodular lesion in the descending part of the duodenum during an examination for hepatic hemangiomas. Ampullectomy was performed, followed by a favourable postoperative period. Histological analysis proved GP. There were no involvement of lymph nodes and a malignancy potential, so the clinical and radiological follow-up opted. In conclusion, because such tumours have unpredictable behavior, we recommend local resection of the tumour, except in cases in which local or ganglionic progression is suspected or confirmed, and thus cephalic pancreaticoduodenectomy (CPD) and lymphadenectomy are suggested.
Levels of MMP2, TIMP1 and TIMP2 in Follicular Fluids in Women Undergoing in Vitro Fertilization and Their Relationship to Oocyte Quality
Authors: Ayvazova Nina P. , Ilieva Lyubomira O. , Konova Emiliana I. , Atanasova Milena A. 
Published: December 2019

Summary
Recently, the important role of matrix metalloproteinases (MMPs) has been identified in follicular development and subsequent ovulation. Although the role of MMP in ovarian tissue remodeling during folliculogenesis has been well studied, the relationship between matrix protease activity and their inhibitors - Tisue inhibitors of matrix metalloproteinases (TIMP) and aging of the oocytes is still unclear. The present study aimed to establish the probable relationship between the expression levels of MMP-2 and TMP-1 and TIMP-2 in follicular fluid with the degree of oocyte maturity and quality. Follicular fluids from 20 women collected on the day of follicular puncture were tested for the presence of MMP-2, TIMP-1, and TIMP-2 using enzyme-linked immunosorbent assay (ELISA). The oocytes obtained were described in terms of maturity, morphology, and fertilization, as well as the embryo’s quality and rate of development. MMP-2 was significantly higher in follicular aspirates in the first prophase of meiosis - germinal vesicle (GV), compared to aspirates with first metaphase (MI) (p=0.011) and second metaphase (MII) of mature oocytes (p=0.010). The MMP-2/TIMP-1 ratio was significantly higher for GV compared to M1 (p=0.011), M2 (p=0.006) and atretic oocytes (p=0.032); (F(3, 71)=2.909, p=0.040). Based on our results, we can conclude that MMP-2 concentration in follicular fluids during the IVF / ICSI procedure had a significant relationship to oocyte maturation levels. It was significantly higher in the case of immature oocytes. On the other hand, oocytes with normal morphology were associated with a significantly higher MMP-2 concentration in follicular fluids.
Disturbances in the Acute Cardiorespiratory Adaptation of Full-Term Neonates
Authors: Georgieva Victoria A. , Marinova Sevdalina M. , Popovsky Nikola K. , Ivanov Stefan I. , Georgiev Lyuben V. 
Published: December 2019

Summary
We studied the incidence and causes of transition disturbances in the first 30 minutes of life in full-term newborns. This one-year study was retrospective and included 1147 full- term live-born neonates without life-threatening congenital anomalies and surgical complications. They were divided into four groups: 0 (with normal transition), 1 (resuscitated without endotracheal intubation), and 2 (intubated); A (without underlying maternal, obstetric or fetal/neonatal problem, with adequate for GA eight and from single birth) and B (with one or more of following: underlying maternal, obstetric or fetal/neonatal problem, SGA or LGA, from multiple pregnancies).
Of the newborns, 9.1% of required resuscitation and 1.6% - extensive resuscitation with intubation. The groups significantly differed in the incidence of underlying maternal, obstetric, or fetal/neonatal problems. Resuscitated babies were born via Caesarean section (CS), in abnormal presentation (PaN) and by vacuum extraction or forceps (V/F) predominantly. The highest incidence of the small for gestational age (GA) babies – SGA, was detected in Group 2. Twins and large for GA (LGA) had prevalence in Group 1. Resuscitation was necessary for 18.1% of CS-delivered babies. V/F and PaN lead to the highest need for intubation. According to our data, every 10th of the full-term neonates required assistance in the fetal-to-neonatal transition. The causes could be diseases of the mother or fetus/newborn, multiple births, SGA, or LGA. A compromised medical decision about the time and way of delivery may result in iatrogenic transition disturbances.
Impact of Factor V Leiden Polymorphism in Patients with PCOS
Authors: Penkov Veselin P. , Kovacheva Katya S. , Golemanov Georgi M. , Georgieva Galia A. , Ivanov Peter D. , Komsa-Penkova Regina S. , Ajewole Olamide 
Published: December 2019

Summary
The present study aimed to evaluate the impact of factor V Leiden (FVL) polymorphism within the reproductive problems encountered by patients with polycystic ovary syndrome (PCOS). A total of 92 female patients with PCOS and 101 healthy controls were included in the study. Clinical and laboratory parameters were examined. The full history of each patient was taken. Single nucleotide polymorphism rs6025 in F5 was genotyped in PCOS patients and compared to the genotype frequency of the healthy controls. The data were analysed for correlation with infertility and pregnancy loss in PCOS patients. The prevalence of FVL polymorphism was higher, however not significantly, in PCOS patients compared to that of the control group (respectively OR=2.238, 95 % CI 0.777±6.449, p=0.104). The carriers of FVL polymorphism showed a higher rate of primary infertility (30.0% versus 12.5%, OR=3.143, 9 % CI 0.686±14.388, p=0.047) and their total reproductive failure rate was higher (60.5% versus 47.2%, OR=1.819, 95% CI 0.632±9.259, p=0.117). Carriage of FVL polymorphism in PCOS patients is associated with primary infertility and a presumed cause of the further investigations needed to understand the impact of FVL on PCOS. Carriage of FVL polymorphism in PCOS patients is associated with a higher rate of primary infertility, which draws attention to the role of this factor in the aetiology of the PCOS-related subfertility. Further investigations are needed to understand the impact of FVL on PCOS.
Processing Speed as an Endophenotypic Marker of Paranoid Schizophrenia
Authors: Veleva Ivanka I. , Stoimenova Maya J. , Chumpalova Petranka G. , Stoychev Kaloyan R. , Tumbev Lyudmil Z. , Valkova Mirena P. 
Published: December 2019

Summary
Schizophrenia is associated with basic neurocognitive deficit- ineffective space-time information assessment, leading to ineffective judgment and planning of behaviour. Our study aimed to examine and compare the psychomotor speed and number of errors in patients with paranoid schizophrenia (PS), first-degree relatives (FDR) and healthy controls (HC). One-hundred-eight patients with PS, 58 with FDR and 60 HCs were examined via Trail Making Tests (TMT) A and B. The influence of other additional factors as The Positive and Negative Syndrome Scale (PANSS), demographics and education were additionally assessed for PS. Statistical analysis was done using Excel 2010, Statgraphics 5.0+ and SPSS 20. All results were interpreted at 95% confidential level. PS showed most unsatisfactory performances on TMT A and B, as compared to others (p=0.0001). However, FDR differed from HC only in TMTB performance (p=0.0241). The most significant impact in PS group included ageing, education, PANSS and negative syndromes, and syndromes of disorganization. PS showed a significant decline of psychomotor speed and executive functioning, although FDR had average results in TMTB, compared to PS and HC. The above results determined both detentions as endophenotype markers for PS. Additional risk factors for decline include ageing, low education and high PANSS results.
Calibration, Validation and Performance Evaluation of Swat Model for Sediment Yield Modelling in Megech Reservoir Catchment, Ethiopia
Authors: Assfaw Abebe Tarko 
Published: December 2019

Abstract
Intensive agricultural practice in Ethiopian highlands results in increasing rates of soil erosion and reservoir sedimentation. The estimation of sediment yield and prediction of the spatial distribution of soil erosion on the upper Megech reservoir catchment enables the local governments and policymakers to maximize the design span life of the Megech reservoir through implementing appropriate soil conservation practices. For this study, the sediment yield was estimated and analyzed through hydrological modeling (SWAT). The simulated outputs of the model show that the mean annual surface runoff was 282 mm and the mean annual streamflow was 153 m3/s. Similarly, 12.33 t/ha mean annual total sediment load gets into the Megech reservoir. The model performance standard used to evaluate the model result indicates that the model was superior in performing the trend of runoff and sediment yield in both calibration and validation periods. Finally, the most erosion vulnerable sub-basins that could have a significant impact on the sediment yield of the reservoir were identified. Based on this, sub-basin 7, 25, 27, 18 and 29 were found to be the most erosion sensitive areas that could have a significant contribution to the increment of sediment yield in the Megech reservoir. Considering the land use, soil type, slope, and relief of erosion vulnerable sub-basins cut off drains, fallow land, contour ploughing, Fanya juu terraces, soil bunds combined with trenches and trees could be the possible management strategies to reduce the sediment yield in the catchment.
Contents, communicational needs and learner expectations: a study of SSL in Haitian immigrants
Authors: Manríquez Daniela Nova 
Published: December 2019

Abstract
This research aims to prove the effectiveness of Spanish as a Second Language lessons for Haitians designed by volunteers in Santiago de Chile. The methodology used through the study was based on the application of two questionnaires to Haitian students in order to compare results, and finally obtain an average that reflects the achievement of the communicative functions expected. Results indicate that neither the lessons planned, material giver nor the Common European Framework of Reference for Languages fulfilled such expectations. Findings are discussed in relation to previous studies on methodologies for Spanish as a Second Language for Haitian immigrants in Chile (Toledo, 2016)
Lowland Slovak youth literature and its interpretational and educational aspects (within and outside the school)
Authors: Šenkár Patrik 
Published: December 2019

Abstract
An integral part of the Slovak cultural context is also Lowland Slovak literature, which includes certain areas of Hungary, Romania and Serbia. The paper outlines the partial development of Slovak youth literature in these regions. It gradually characterizes the most important aspects of diachrony of this segment of writing (in a certain chronotope that is bound to selected prototexts). Based on objective-subjective interpretations of three emblematic works of this context, it highlights - as a certain typology - not only the general / universal, but also the specific / particular (that is particularly relevant to the context) in intra- and intercultural relations. It accentuates the literary tradition, which is still a useful source of realistic short stories and novels for child percipients in these diasporas. It also traditionally and innovatively points out the typical features of teaching in individual national-minority schools in the mentioned countries. Methodologically (but also practically) it is, of course, based, on thematic, motif related, etc. aspects of the analyzed (selected) works and their possible reflection in school education and learning environment. Finally, the use of language / features / motifs / aspects / procedures is concretized in specific conditions outside the physical boundaries of the homeland as a kind of perspective on the correlation of the difficult process of cultural education itself.
Teacher-student interaction and management practices in Pakistani English language classrooms
Authors: Ahmad Muhammad , Shakir Aleem , Siddique Ali Raza 
Published: December 2019

Abstract
This study aimed to investigate the amount and type of teacher-talk, frequently asked questions and feedback provided by the teacher on learners’ performance in a language classroom. For this purpose, a lecture was recorded from a secondary level English language classroom of a public sector school and interpreted in the light of teacher-student interaction and classroom management model by David Nunan. Results revealed that the maximum amount of time (i.e. 80.1%) was consumed by the teacher which was appropriate. However, certain deviations from classroom management principles were also observed regarding frequently asked questions (i.e. 50% of the total questions were elicitation questions) and the feedback (it was ‘romantic’ in nature). Moreover, wait-time was sufficient but it was of no use to the learners. The study concluded that classroom practices did not conform to the principles therefore, it proposed to ask questions and provide feedback appropriately.
Satisfaction with the lives of elderly nursing homes residents
Authors: Trybusińska Dorota , Saracen Agnieszka 
Published: December 2019

Abstract

Introduction. Ageing of societies is a process apparent in nearly all countries worldwide. Many families will not be able to provide care services for the elderly, the burden of care will fall mainly on public and private institutions. This puts employees of nursing homes in front of numerous challenges in order to provide seniors with improvement of their life satisfaction.

Aim. The purpose of the study was to assess the life satisfaction of elderly nursing home residents in the Mazovian region and to demonstrate variables that affect it.

Material and methods.. The research was carried out in 2018 among the 250 elderly nursing home residents from Mazovia. During the test, a diagnostic survey method and a questionnaire technique were used. The research tool was the Satisfaction With Life Scale (SWLS), Katz’s Activities of Daily Living Scale, Hodgkinson’s Abbreviated Mental Test Score, Basic Hope Inventory (BHI-12), Acceptance of Illness Scale (AIS), and the authors’ survey questionnaire.

Results. Among the respondents, the dominant group included people with low life satisfaction (42.8%). A statistically significant relationship was found between life satisfaction and the age of the respondents and selected psychometric scales. There was no such correlation for the level of mobility, duration of stay at the nursing home and the size of the inhabited facility.

Conclusions. Elderly people living in nursing homes from Mazovia enjoy life satisfaction at a low and average level. The results distinguish three groups of residents exhibiting a lower satisfaction with life, namely, new arrivals, the oldest, and suffering from a minimum of one illness. Nursing home personnel who deal with patients on an everyday basis should aim to improve their life satisfaction.
Investigation of fast neutron shielding properties of new polyurethane-based composites loaded with B4C, BeO, WO3, ZnO, and Gd2O3 micro-and nanoparticles
Authors: Mesbahi Asghar , Verdipoor Khatibeh , Zolfagharpour Farhad , Alemi Abdolali 
Published: December 2019

Abstract
The aim of the current research was to study the radiation shielding properties of polyurethane-based shielding materials filled with B4C, BeO, WO3, ZnO, and Gd2O3 particles against fast neutrons. The macroscopic cross sections of composites containing micro- and nanoparticles with a diameter of 10 µm and 50 nm were calculated using MCNPX (2.6.0) Monte Carlo code. The results showed that adding nano-scaled fillers to polyurethane matrix increases attenuation properties of neutron shields compared to micro-scaled fillers for intermediate and fast neutrons. Among the studied composites, WO3 and Gd2O3 nano-composites presented higher neutron cross section compared to others.
Janus – A New Approach to Air Combat Pilot Training
Authors: Bridel Georges , Goraj Zdobyslaw , Kiszkowiak Lukasz , Brévot Jean-Georges , Devaux Jean-Pierre , Szczepanski Cezary 
Published: December 2019

Abstract
Advanced jet training still relies on old concepts and solutions that are no longer efficient when considering the current and forthcoming changes in air combat. The cost of those old solutions to develop and maintain combat pilot skills are important, adding even more constraints to the training limitations. The requirement of having a trainer aircraft able to perform also light combat aircraft operational mission is adding unnecessary complexity and cost without any real operational advantages to air combat mission training.
Thanks to emerging technologies, the JANUS project will study the feasibility of a brand-new concept of agile manoeuvrable training aircraft and an integrated training system, able to provide a live, virtual and constructive environment. The JANUS concept is based on a lightweight, low-cost, high energy aircraft associated to a ground based Integrated Training System providing simulated and emulated signals, simulated and real opponents, combined with real-time feedback on pilot’s physiological characteristics: traditionally embedded sensors are replaced with emulated signals, simulated opponents are proposed to the pilot, enabling out of sight engagement. JANUS is also providing new cost effective and more realistic solutions for “Red air aircraft” missions, organised in so-called “Aggressor Squadrons”.
Validation of Numerical Models Used for Designing the Composite Blade for ILX-27 Rotorcraft
Authors: Wilk Jakub , Guzikowski Radosław 
Published: December 2019

Abstract
The paper presents the validation procedure of the model used in the analysis of the composite blade for the rotor of the ILX-27 rotorcraft, designed and manufactured in the Institute of Aviation, by means of numerical analyses and tests of composite elements. Numerical analysis using finite element method and experimental studies of three research objects made of basic materials comprising the blade structure – carbon-epoxy laminate, glass-epoxy composite made of roving and foam filler – were carried out. The elements were in the form of four-point bent beams, and for comparison of the results the deflection arrow values in the middle of the beam and axial deformations on the upper and lower surfaces were selected. The procedure allowed to adjust the discrete model to real objects and to verify and correct the material data used in the strength analysis of the designed blade.
Theoretical and Experimental Review of Applied Mechanical Tests for Carbon Composites with Thermoplastic Polymer Matrix
Authors: Bona Anna 
Published: December 2019

Abstract
This article has a theoretical and experimental character. It presents the characteristics of two main thermoplastics used in the aerospace industry – poly ether ether ketone (PEEK) and poly phenylene sulphide (PPS). The selected materials are compounds for the production of thermoplastic polymer matrix composites. The paper presents a literature review of the application of thermoplastic polymer matrix composite materials in aviation. Additionally, the paper focuses on the characteristics of carbon fibre-reinforced polymer (CFRP) which plays an important role in the production of aerospace components. Testing methods have been chosen on the basis of the type of composite matrix. The article contains the most important mechanical properties and general characteristics of thermoplastics used as a matrix for CFRP type composites used in the aerospace industry. Individual test procedures which allow for the evaluation of mechanical properties of composite materials on a thermoplastic polymer matrix, have been described. Mechanical tests such as static tensile test and bending of short beams were carried out in order to examine CFRP composites.
Comparative Analysis of Macro- and Microstructure of Printed Elements in the FDM, SLS and MJ Technologies
Authors: Majca-Nowak Natalia , Kluska Ewelina , Gruda Piotr 
Published: December 2019

Abstract
The article presents research conducted with the project: ‘Additive manufacturing in conduction with optical methods used for optimization of 3D models’’ [2]. The article begins with the description of properties of the materials used in three different additive technologies – Fused Deposition Modelling (FDM), Selective Laser Sintering (SLS) and Material Jetting (MJ). The next part focuses on the comparative analysis of macro- and microstructure of specimens printed in order to test selected materials in additive technologies mentioned above. In this research two types of specimens were used: dumbbell specimens and rectangular prism with hole specimens. In order to observe macrostructure specimens, they were subjected to load test until it broke. In the case of observing microstructure, they were cut in some places. Each of described additive technologies characterizes by both different way of printing and used materials. These variables have a significant influence on macro- and microstructure and fracture appearance. FDM technology specimens printed of ABS material characterized by texture surface appearance. SLS technology specimens printed of PA12 material characterized by amorphous structure. MJ technology specimens printed of VeroWhite Plus material characterized by fracture appearance which had quasi- fatigue features. The microstructure of these specimens was uniform with visible inclusions.
Acute traumatic presentation of Chiari I malformation with central cord syndrome and presyrinx in an infant
Authors: Young Christopher C. , Ellenbogen Richard G. , Hauptman Jason S. 
Published: December 2019

Background:
Chiari I malformation (CM-I) typically presents in late childhood and early adulthood. Often these lesions are asymptomatic and discovered incidentally. Patients typically present with tussive headaches and focal neurological findings, especially when associated with syringomyelia. Here, an 11-month-old child with a severely symptomatic CM-I required surgery (e.g., suboccipital craniectomy and C1/2 laminectomy) within the 1st year of life.

Case Description:
An 11-month-old infant presented with acute bilateral upper extremity weakness following a ground-level fall. The magnetic resonance imaging of the cervical spine showed crowding at the craniocervical junction with 7 mm of cerebellar tonsillar herniation/descent, and swelling/edema of the cervical spinal cord with a presyrinx. The patient underwent an urgent suboccipital craniectomy and C1/2 laminectomy under intraoperative neuromonitoring; the motor evoked potentials in the upper and lower extremities partially recovered intraoperatively. One day postoperatively, bilateral upper extremity strength improved; 4 weeks later, he recovered full neurological function. The follow-up MR also showed complete resolution of the previously noted presyrinx.

Conclusion:
Acute neurological deficits may occur in infants with CM-I who, following trauma, sustain the equivalent of a central cord syndrome. Neurosurgical evaluation with MR should prompt timely/appropriate surgical decompression (e.g., suboccipital craniectomy and C1/2 laminectomy).