bluuebunny/crossref_metadata_2025 huggingface dataset:
Unusual presentation of adenocarcinoma of lung with metastasis in a young female
Authors: Pandya Harshil V. , Pandya Hiren P.
Published: February 2021

Adenocarcinoma of lung remains the commonest subtype of lung cancer. Despite of recent advances, the presentation of carcinoma of lung is delayed many of the times until later stages. Here is a case of a young pregnant female with adenocarcinoma of lung with brain metastasis with unusual presentation.
Coping Strategies of Infertility Clients Attending Gynecological Clinic in South-Eastern Nigeria
Authors: Maduakolam Ijeoma Onyinyechi , Umeh Uchenna Anthony , Ndubuisi Ifeoma Francisca , Onyekachi-Chigbu Agnes Chinyere
Published: February 2021

Background:

Infertility is the failure of a couple to achieve pregnancy after 12 months or more of regular unprotected sexual intercourse. It causes psychological and social consequences for couples. This study aimed to ascertain the “Coping strategies of infertility clients attending gynecological clinic in South-eastern Nigeria.”

Subjects and Methods:

A cross-sectional descriptive survey was used. One hundred and twenty participants were drawn from a population of one hundred and fifty clients, using the power analysis formula of sample size calculation. Participants were selected using a purposive sampling technique. One hundred and seventeen participants were analyzed using the Statistical Package for the Social Sciences version 25. Descriptive and inferential statistics were used at a 0.05 level of significance. P < 0.05 was considered statistically significant.

Results:

Majority of the participants use self-controlling, positive reappraisal coping strategy, and social seeking support strategy. There is no significant difference in the mean responses of male and female participants with infertility on their use of coping strategies. The respondents used more self-controlling (86.3%) strategies than they used positive reappraisal (62.4%), escape-avoidance (59.8%), and other coping strategies (47.0%) and these showed statistical significance (P < 0.05). Even though they used social support seeking as much as they used self-controlling strategies, this finding was not significant (P > 0.05). Furthermore, gender was found to have a significant influence on the coping strategies among the study participants (P < 0.05).

Conclusion:

The couple's capacity to adapt to infertility-related stress depends on the coping strategies, which have different impacts on individuals' mental health. Hence, this study suggested the need for health-care providers to integrate psychological counseling into the care of clients with infertility challenges.
Cervical Hemilaminectomy in the Management of Degenerative Cervical Spine Myelopathy
Authors: Ndubuisi Chika Anele , Ndafia Ned Michael , Ohaegbulam Samuel Chukwunonyerem
Published: February 2021

Introduction:

Hemilaminectomy is one of the surgical options for managing cervical spondylotic myelopathy. However, it has not gained the expected popularity. This paper aims to review the utilization of hemilaminectomy, the outcome, and complications observed among patients managed with the procedure for advanced multilevel degenerative cervical myelopathy.

Methods:

Retrospective longitudinal analysis was done at a neurosurgical hospital in Enugu, Nigeria, between years 2010 and 2019. The Study analyzed 46 patients that had cervical hemilaminectomy for multilevel degenerative cervical myelopathy. Excluded from the study were patients offered cervical hemilaminectomy for other indications including tumor and trauma. Patients were assessed by comparing preoperative, and follow-up modified Japanese Orthopedic Association (mJOA) score and Cobb lordotic angles. The minimum postoperative follow-up period was for 1 year.

Results:

The mean age was 61 (43–88) years; male-to-female ratio was 3.6:1. Symptoms duration ranged from 6 months to 10 years, and 31 (67.4%) patients had significant comorbidities. The average operation time was 2 h 36 min (0.5–3.0 h). The mean blood loss was 260 mL (100–800 mL). Right hemilaminectomy was done for 37 (80.4%) patients. The average preoperative and postoperative Cobb lordotic angles were 10.90° ± 2.4° and 9.98° ± 2.1°. The mean preoperative mJOA was 8.2 ± 1.4. On follow-up 1 year after surgery, the mean mJOA score was 12.2 ± 1.1 (P = 0.0001). The neurological recovery rate at 1-year follow-up was 50.5%. One patient each experienced a transient postoperative drop in neurology, postoperative respiratory distress, and surgical site infection.

Conclusion:

Cervical hemilaminectomy for multilevel degenerative cervical spine myelopathy has the potential to achieve clinically satisfactory neurological improvement without significantly compromising stability and other serious long-term complications.
Testicular Atrophy Following Inguinal Hernia Repairs
Authors: Ogbetere Friday Emeakpor , Imoisili Udoka
Published: February 2021

Testicular atrophy is a rare complication of hernia repairs which often results in litigations. While early detection and treatment of ischemic orchitis obviate this grave complication, good communication and adequate counseling are known to minimize the associated litigations. Herein, we report two cases of testicular atrophy following herniorrhaphy. Both patients noticed scrotal pain and swelling within three days after the surgery and were given antibiotics and analgesia by the attending surgeons. They subsequently developed a gradual reduction in testicular volume after two months with severe atrophy of the affected testis. The objectives of this case series are to emphasize the need for immediate evaluation of genital symptoms such as scrotal pain, swelling, and redness after inguinal hernia repairs and the need to counsel patients for possible orchitis, atrophy, and testicular loss before any groin surgery.
Assessing Research Engagement of Resident Doctors in Training in Northwestern Nigeria
Authors: Umar Shehu Salihu , Babandi Zaharadeen Shuaibu , Suleiman Auwal Garba , Umar Umar Muhammad , Olorukooba Abdulhakeem Abayomi , Ahmad Aisha Jamila , Muhammad Bilqis O. , Umar Abubakar Ibrahim , Ahmad Adam , Obazenu Lawson O.
Published: February 2021

Background:

Residency training develops trainees to practice evidence-based medicine using knowledge acquired through researches. Resident doctors are not just expected to be consumers of good researches but are also expected to build their competencies in conducting researches in their fields of specialization. They are expected to engage in journal clubs as well as scientific paper presentations in local and international conferences under the mentorship and guidance of their trainers. In addition, trainers in residency training supervise the compulsory dissertation of senior residents under them.

Objectives:

We aimed to assess research engagement of resident doctors in training and pattern of submission and approval of their dissertation proposal.

Methodology:

It was a descriptive cross-sectional descriptive study involving resident doctors in accredited hospitals in Northwestern Nigeria. Electronic questionnaires were distributed to respondents via their verified electronic media contacts. Data were collected within a period of 1 month from July 10 to August 6, 2020. Data were analyzed using mean, standard deviation, simple tables as well as Z-test and Chi-square test. The level of significance was set at 0.05 for decision purposes.

Results:

A total of 120 questionnaires were completed. The mean age of respondents was 38.0 ± 3.8 years, with majority being males 88 (83.3%), and 107 (89.2%) being married. Only 12 (10%) and 44 (36.7%) respondents had published manuscript before and since commencement of residency training, respectively. There was a significant difference between manuscript publication before and since commencement of residency training (P = 0.012). Only 32% of the respondents who submitted their dissertation proposal to the colleges did so within 12 months of success in their Part 1 fellowship examination. There was no association between the publication of manuscript during residency training and submission of dissertation to either National Postgraduate Medical College of Nigeria (P = 0.190), West African College of Surgeons (P = 0.686), or West African College of Physicians (P = 0.317).

Conclusion:

Research engagement by resident doctors from this study was not satisfactory. Publication of manuscript by resident doctors was associated with prior publication before commencement of residency training and type of training hospital.
Dissociative experiences and health anxiety in panic disorder
Authors: Ray Sujoy , Ray Rajashree , Singh Neha , Paul Imon
Published: February 2021

Background:

Dissociative experiences and health anxiety are frequently encountered in anxiety disorders and contribute to the burden of illness.

Aim:

The aim was to assess and compare dissociative experiences and level of health anxiety in patients with panic disorder and normal individuals.

Materials and Methods:

We recruited forty eligible patients with panic disorder and forty healthy volunteers without any psychiatric diagnoses. Health anxiety was evaluated by the Short Health Anxiety Inventory and dissociative symptoms were assessed by the Dissociative Experiences Scale (DES).

Results:

Dissociative experiences were more frequently reported by patients with panic disorder compared to normal controls, but overall mean DES scores were lower in both groups compared to previous literature. A high level of health anxiety was also seen in panic disorder compared to normal individuals.

Conclusion:

Health anxiety and dissociative experiences, especially depersonalization-derealization, are commonly encountered in panic disorder and should be actively explored to understand how they influence psychopathology and treatment outcome.
Non-existence of conformally flat real hypersurfaces in both the complex quadric and the complex hyperbolic quadric
Authors: Yao Zeke , Yin Bangchao , Hu Zejun
Published: February 2021

In this paper, by applying for a new approach of the so-called Tsinghua principle, we prove the nonexistence of locally conformally flat real hypersurfaces in both the m-dimensional complex quadric
$Q^m$
and the complex hyperbolic quadric
$Q^{m\ast }$
for
$m\ge 3$
.
Positive solution to Schrödinger equation with singular potential and double critical exponents
Authors: Su Yu
Published: February 2021

In this paper, we consider the following Schrödinger equation with singular potential and double critical exponents:

-\Delta u + \frac{A}{|x|^{\alpha}}u = |u|^{2^{*}-2}u + |u|^{p-2}u + \lambda |u|^{2_{\alpha}^{*}-2}u,\quad x\in \mathbb{R}^{N},

where

N\geq 3

,

\alpha\in(0,2)

,

p\in(\frac{2N-4+2\alpha}{N-2},2^{*})

, and

A,\lambda>0

are two real constants, and

2^{*}=\frac{2N}{N-2}

is the Sobolev critical exponent, and

2_{\alpha}^{*}=2+\frac{4\alpha}{2N-2-\alpha}

is the critical exponent with respect to the parameter

\alpha

. First, using the refined Sobolev inequality, we establish the Lions type theorem. Second, we prove that any nonnegative weak solutions of above equation satisfy Pohozaev type identity. Finally, by using perturbation method, Pohozaev type identity and Lions type theorem, we show the existence of positive solution to above equation. We point out that the double critical exponents is an new phenomenon, and we are the first to consider it. Our result partial extends the results in Badiale and Rolando [Rend. Lincei Mat. Appl. 17 (2006)], and Su, Wang and Willem [Commun. Contemp. Math. 9 (2007)].
Higher differentiability for a class of obstacle problems with nearly linear growth conditions
Authors: Gavioli Chiara
Published: February 2021

We establish higher differentiability results of integer order for solutions to a class of obstacle problems with nearly linear growth, provided that we assume a suitable extra integer differentiability property of Sobolev order on the gradient of the obstacle. Our results cover a large class of models for which the Lavrentiev phenomenon does not appear.
Pathology of essential spectra of elliptic problems in periodic family of beads threaded by a spoke thinning at infinity
Authors: Nazarov Sergei A. , Taskinen Jari
Published: February 2021

We construct ‘‘almost periodic’’ unbounded domains, where a large class of elliptic spectral problems have essential spectra possessing peculiar structure: they consist of monotone, non-negative sequences of isolated points and thus have infinitely many gaps.
Babalığın Anlamı ve Bakire Doğum Tartışması
Authors: DELANEY Carol
Published: February 2021

Babalık kavramı, insan toplumunun evrimi ve örgütlenmesi ile ilgili teorik tartışmaların merkezinde yer almıştır. Bu tartışmalar, bazı çağdaş “ilkellerin” babalığı kabul etmediği ortaya çıkınca yoğunlaştı. Onların doğurganlık inançları, Bakire Doğum ile birlikte, doğaüstü doğumun yaygın temasına örnek olarak sınıflandırıldı. Bu makalede babalık anlamını anlamayan, bu nedenle başkalarının inançlarını çarpıtan ve kendi çıkarımlarımızı gizleyen antropologlar olduğunu iddia ediyorum. Türkiye'deki saha çalışmasından yararlanarak babalığın ortaya çıkarmak, birincil ve yaratıcı rol anlamına geldiğini, anneliğin ise yetiştirme ve taşıma anlamına geldiğini gösteriyorum. Babalığın bu “monogenetik” (tekkaynakçı) anlamı Hristiyanlıkta açıkça belirtilmiştir ve Bakire Doğum tarafından örneklendirilmiştir ancak tek tanrılığın teolojik konseptiyle de tutarlıdır. Benzer şekilde Trobriand Adalılarının ve Avustralya Aborjinlerinin üreme inançları, kozmolojik inançlarıyla tutarlıdır. Bunlar farklı sistemlerdir ancak her ikisi de samimi ve nihai kaygıların tam ortasında, ikisiyle de bütünleşmiştir. Son olarak, babalığın 19. yüzyıldan günümüze kadar teorisyenler için neden bu kadar cazip olduğu sorulmuştur.
Approximate Model-based State Estimation in Simplified Receding Horizon Control
Authors: Redjimi Hemza , Tar József K.
Published: February 2021

Multiple variable systems often have to be so controlled that in the lack of appropriate sensors no satisfactory information is available for the complete estimation of their state variables. Normally only their certain components are kept under observation and control, while the other ones evolve according to the consequences of the exerted control signal. In control-based treatment of patients suffering from "Type 1 Diabetes Mellitus (T1DM)", the only directly measured quantity is the subcutaneous glucose concentration in the blood controlled by a single control signal, the insulin ingress rate. The applied model may use several components in the state variable. The traditional "Receding Horizon Controller (RHC)" requires the estimation of the complete state variable for the calculation of the control signal. In this paper preliminary simulations are persented in which the operation of the RHC is studied in the control of two vertically connected, oscillating masspoints so coupled by springs that only the state of the upper one is observed and directly controlled. Instead sensor-based observations, the lower point’s coordinate is calculated by the use of an available "rough" model. Preliminary calculations were made for a particular human glucose-insulin model, too. In the implementation of the RHC special simplifications were introduced. In our further work we wish to apply this method for investigating various T1DM treatment models.
Role Playing and Second Dialect Teaching in the West Indies
Authors: Wilson Don
Published: February 2021

In this paper one specific technique for developing language proficiency in our pupils will be discussed. This technique, role playing, has been found by this writer to be uniquely suited to fostering the development of the many kinds of language skills and attitudes to variations in language use, which our pupils need in order to function confidently in our peculiar language situation.
Revisión Sistemática de Literatura: Tendencias de los sectores educación, finanzas y salud en los procesos de implementación de Gobierno de Tecnologías de la Información
Authors: Pinargote Carlos Luis , Ramón López Carlos , Cruz Marely , Flores Pablo
Published: February 2021

El objetivo del presente estudio es determinar los modelos o estándares y herramientas computacionales utilizadas en los procesos de iniciativas de Gobierno de Tecnologías de la Información en los sectores de educación, finanzas y salud. Se utilizan los métodos de mapeo y revisión sistemática de literatura para evaluar e interpretar la información disponible en dos bases de datos de carácter científico como son SCOPUS y WEB of SCIENCE publicadas en los años comprendidos entre 2012 y 2017. Los resultados se registraron en un instrumento de extracción de información construido con dos enfoques, en el primero se registró información del contexto actual sobre Gobierno TI y en el segundo se ubicó información relacionada a las preguntas de investigación. La búsqueda encontró 619 documentos que cumplían los criterios de inclusión y exclusión. En estos trabajos se aplicó el método de mapeo para obtener el resumen de datos en cada una de las preguntas de investigación. Se concluye que el presente trabajo identificó los procesos de Gobierno de Tecnología de la Información que han tenido mayor relevancia en los sectores en educación, finanzas y salud dentro de los años objeto de la revisión de los documentos, permitiendo la orientación de futuros trabajos considerando los modelos investigados y probados.
La acreditación de idiomas en las universidades españolas: Un estudio cuantitativo en la Universidad de Córdoba.
Authors: Raigón Rodríguez Antonio , Larrea Espinar Ángela
Published: February 2021

Con la implantación casi generalizada de requisitos lingüísticos en los grados de las universidades españolas, la acreditación de los niveles de competencia en lenguas extranjeras ha tomado una relevancia esencial. Dentro de este trabajo, presentaremos una visión global del estado de la cuestión en España, para más tarde centrarnos en el análisis de la acreditación lingüística del alumnado de la Universidad de Córdoba. Nuestro estudio estadístico, basado en un grupo de más de dos mil alumnos, nos proporcionará datos con los que dibujar un panorama aproximado del nivel de acreditación idiomática en nuestra universidad, teniendo en cuenta variables tales como la nota de acceso, la macroárea, el sexo o el idioma seleccionado para cumplir con el requisito a la hora de egresar. Asimismo, podremos dilucidar si caminamos hacia una Europa más plurilingüe o no.
Creating a Sustainable Competitive Advantage for Organizations Through the Implementation of Knowledge Management with the help of Modern Information Technology
Authors: Hajimohammadi Mohammad , Bazrkar Ardeshir , Vafaei Sajad
Published: February 2021

Hoy, los rápidos cambios ambientales, organizativos y tecnológicos han creado un entorno competitivo complejo para las organizaciones. La tecnología de la información es una herramienta y una estrategia para que las organizaciones interactúen con estas complejidades y cambios. El presente estudio evalúa el papel mediador de la tecnología de la información moderna en relación con la gestión del conocimiento y la ventaja competitiva sostenible. Para verificar las hipótesis, se utilizaron dos valores críticos (CR y P) sustentado en el modelo de ecuación estructural. Basado en el nivel de significancia del 5%, el valor crítico debe ser mayor que 1.96. De acuerdo, con los resultados, para todas las hipótesis de investigación, este valor fue más de 1.96 y el valor de P fue menor al 5%. Se puede concluir que la tecnología de la información y la gestión del conocimiento tienen un impacto positivo y significativo en la creación y el desarrollo de una ventaja competitiva sostenible para las organizaciones. Por ultimo, se encontró que la tecnología de la información moderna es un importante papel mediador en la relación entre la gestión del conocimiento y la ventaja competitiva sostenible.
La sustitución de los trabajadores huelguistas por medios tecnológicos
Authors: Cordero Gordillo Vanessa
Published: February 2021

Las tecnologías de la información y la comunicación están teniendo una incidencia decisiva en las relaciones de trabajo tanto en el plano individual como en el plano colectivo. Atendiendo a esta última perspectiva, uno de los ámbitos en los que el impacto de los avances tecnológicos se está manifestando con especial intensidad es en el derecho de huelga. En concreto, uno de los principales retos que se plantean es el relativo a la sustitución de los trabajadores huelguistas mediante medios técnicos, lo cual se ha denominado esquirolaje tecnológico. Con estas premisas, el presente trabajo aborda la problemática subyacente a este tipo de prácticas, partiendo de la obsolescencia de la regulación del derecho de huelga en nuestro ordenamiento jurídico y su necesaria adaptación a las nuevas realidades sociales, así como de las resoluciones judiciales que hasta el momento se han pronunciado sobre esta cuestión. Todo ello con la finalidad de formular propuestas que puedan contribuir a dar solución a los dilemas interpretativos que surgen en estos supuestos.
La prevención de riesgos laborales en Chile: algunas reflexiones sobre la deuda de seguridad empresarial
Authors: Núñez González Cayetano
Published: February 2021

La prevención de riesgos laborales es un derecho básico de los trabajadores, por su evidente conexión con el derecho a la vida y a la salud. Su relevancia y complejidad jurídica merecen conocer cómo se regula el deber de seguridad en el ordenamiento jurídico chileno, cuáles son sus características más relevantes y cuál es el alcance de esta obligación empresarial.
Doctrina consolidada sobre el recargo de prestaciones por omisión de medidas de seguridad y la incidencia de la actuación temeraria (a propósito de la STSJ Extremadura, de 15 de mayo de 2018, rec. 200/2018)
Authors: Poquet Catalá Raquel
Published: February 2021

En este trabajo se realiza un estudio de los requisitos del recargo de prestaciones de Seguridad Social por omisión de las medidas de seguridad y salud, especialmente de la infracción de las medidas de seguridad por parte del empresario cuando éstas tienen lugar por omisión de las mismas, como es el caso de no dar formación, no haber realizado evaluación de riesgos y no ofrecer protección alguna a los trabajadores, en situaciones en las que el más elemental nivel de diligencia es omitido conscientemente por parte del empresario.
Trabajo precario en empresas multiservicios: una propuesta de solución legal
Authors: López Balaguer Mercedes
Published: February 2021

El presente trabajo plantea una propuesta de solución a la situación de precariedad en la que prestan servicios miles de personas trabajadoras que son contratadas por empresas multiservicios que las ponen a disposición de otras empresas en el marco de una contrata de servicios que se sitúa en la frontera de la cesión ilegal
Retos y compromisos internacionales para la consolidación del Estado social y democrático de derecho en España
Authors: Salcedo Beltrán Carmen
Published: February 2021

El presente estudio se dedica a mostrar la desestabilización y amenaza que adolece en España uno de los hitos más importantes de la humanidad, como es el Estado Social y Democrático de Derecho y la necesidad de su restablecimiento y consolidación por la vía del respeto de los compromisos internacionales asumidos, en particular, respecto del Pacto de Derechos Económicos, Sociales y Culturales y de la Carta Social Europea.A lo largo del mismo, se examinan los déficits existentes, puestos de manifiesto con las violaciones de derechos sociales constatadas y comunicadas por los respectivos órganos supranacionales de control de su cumplimiento, que deben ser corregidas y acatadas, como interpretación auténtica y vinculante, en cumplimiento del art. 96 de la Constitución Española y de la Ley 25/2014, de 27 de noviembre, de Tratados y otros Acuerdos Internacionales, así como los ineludibles retos a asumir.Con ello, se fortalecería la legitimidad del país, se incrementaría la confianza de la sociedad en el Estado al atender las exigencias de los ciudadanos y, por derivación, la justicia social.
Guamán Hernández, A., González Moreno, G., Empresas Transnacionales y Derechos Humanos. La necesidad de un instrumento vinculante. Bomarzo, Albacete, 2018
Authors: Gil Sánchez Guacimara
Published: February 2021

El presente texto es una recensión del libro de Adoración Guamán y Gabriel Moreno, dedicado a analizar las diferentes aristas socio-políticas y fundamentalmente jurídicas de la relación conflictual entre las empresas transnacionales y los derechos humanos. La obra afirma, tras un amplio repaso a las diferentes normas e instrumentos no vinculantes existentes para enmarcar la cuestión, la necesidad y la posibilidad avanzar hacia la aprobación del llamado Binding Treaty, el Instrumento Internacional Jurídicamente Vinculante sobre Empresas Transnacionales y otras empresas de negocios con respecto a los derechos humanos que está siendo negociado siguiendo el mandato de la Resolución 26/9 en el marco del Consejo de Derechos Humanos de Naciones Unidas
INFLUENCE OF THE PHOTODIODE SPECTRAL SENSITIVITY ON THE TEMPERATURE ESTIMATION BY SXR USING THIN FILTERING FOILS IN URAGAN-3M
Authors: Dreval M.B. , Turianska O.V. , Pahur A.S.
Published: February 2021

Soft X-ray (SXR) diagnostics is routinely used in Uragan-3M (U-3M) torsatron. One of the SXR diagnostic applications is based on the plasma temperature estimation. The ratio of SXR signals passed through two different foils depends only on the plasma temperature and can be used for its estimation. An influence of spectral sensitivity of the photodiode on the two foils temperature estimations technique is considered in present work numerically. The influence is negligible in the case of the flat sensitivity in the energy range 5…500 eV in the case of thin 1.5/2.25 μm Al foils. In the opposite case of very low spectral sensitivity in 5…500 eV range and its increase at the 1 keV range the signals ratio can be very high. This result can explain high signals ratio experimentally observed in Uragan-3M stellarator, where photodiodes with unknown spectral sensitivity were used.
EFFECTS OF ARGON ATOMS IN EXCITED STATES ON PROPERTIES OF ARGON-ACETYLENE DUSTY PLASMA
Authors: Denysenko I.B. , Ivko S. , Azarenkov N.A. , Burmaka G.
Published: February 2021

It is studied how dissociation and ionization of acetylene molecules in their collisions with argon atoms in excited states Ar* may affect properties of argon-acetylene plasma with growing inside of plasma volume dust particles. The study is carried out using a volume-averaged model. To analyze the effects of Ar* atoms on the electron and ion densities, the effective electron temperature and the densities of radical and nonradical neutral species, the values of ionization and dissociation rates for collisions of acetylene molecules with Ar* atoms are varied in numerical calculations. It is found that the collisions of Ar* atoms with acetylene molecules affect essentially the argon-acetylene dusty plasma.
SLOW SURFACE ELECTROMAGNETIC WAVES AT THE METASURFACE / DISSIPATIVE DIELECTRIC INTERFACE
Authors: Galaydych V.K. , Sporov A.E. , Olefir V.P. , Azarenkov N.A.
Published: February 2021

The possibilities of the slow surface electromagnetic waves propagation along the flat boundary of a metasurface with a dissipative dielectric are studied. The metasurface is a thin flat slab of metamaterial with simultaneously negative permittivity and permeability with "amplification". All media were assumed to be isotropic. Dispersion dependences are obtained for the eigenmodes of such a waveguide structure. The possibility of full compensation of the energy losses of surface waves by the appropriate choice of the “gains” values is demonstrated.
TO THE DISTRIBUTION OF THE DISPERSION EQUATION ROOTS FOR THE PARAMETRIC CHERENKOV RADIATION
Authors: Tkachenko V.I. , Tkachenko I.V. , Tolstoluzhsky A.P. , Khizhnyak S.N.
Published: February 2021

Distribution of the roots of dispersion equation of the parametric Cherenkov radiation (PCR) excited by uniformly moving charged particle in an ideally conducting metal waveguide filled with a spatially periodic layered dielectric is studied. The study both in long wavelengths range and in the range of wavelengths comparable and smaller than the period of non-uniformity is presented. It is shown that in the case of long wavelengths the dependence of the frequency of the excited PCR on the particle velocity is monotonic. For the case of wavelengths comparable and shorter than the non-uniformity period the spectrum of PCR is more complicated. Its characteristic features are determined.
ANOMALOUS TRANSPORT OF TRANSVERSELY ACCELERATED IONS IN LOWER HYBRID CAVITIES
Authors: Azarenkov N.A. , Chibisov A.D. , Chibisov D.V.
Published: February 2021

The transport of particles and heat for transversely accelerated ions in lower hybrid cavities due to drift turbulence is investigated. The transport equations for the conditions of lower hybrid cavities are obtained. It is shown that the anomalous transport of particles and heat across the geomagnetic field in the lower hybrid cavities is caused to the scattering of ions by random pulsations of drift turbulence. It was found that the diffusion and thermal diffusion of accelerated ions in the cavity occurs in a time comparable to the time of filling the cavity with the back ground plasma.
PiCOPIC: 2.5-D PARTICLE-IN-CELL CODE, OPTIMIZED FOR SIMULATION OF BEAM-PLASMA INTERACTIONS
Authors: Vynnyk O.K. , Anisimov I.O.
Published: February 2021

Original code optimized forsimulation of interactions between plasma and charged particles beams and bunches, based on particle in cell method described. The code is electromagnetic and fully relativistic with 2.5D axial symmetric geometry. Binary coulomb particle collisions are taken into account. The code is fully parallelized and designed for computer systems with shared memory. Ability to extend supported platforms to systems with distributed memory (like computer clusters or grids) is embedded into code architecture.
TRANSILLUMINATION OF THE DENSE PLASMA BARRIER BY THE STRONG BEAM OF ELECTROMAGNETIC WAVES: COMPUTER SIMULATION
Authors: Mykhailenko B.R. , Anisimov I.O.
Published: February 2021

Transillumination of a dense plasma barrier by a strong electromagnetic wave beam has been studied via simulation using the PIConGPU software package. Formation of the channel with reduced plasma density, predicted theoretically and detected experimentally, was observed. For a higher power incident beam, plasma turbulent dynamics has been observed, which leads to its "fast" transillumination. The simulation results didn’t confirm the theoretically proposed mechanisms of "fast" transillumination.
AN ATTEMPT FOR INCREASING THE EFFICIENCY OF PENNING SOURCE OF Н- IONS WITH A METAL HYDRIDE CATHODE
Authors: Sereda I. , Ryabchikov D. , Hrechko Ya. , Babenko Ie.
Published: February 2021

The possibility of increasing the current of negative hydrogen ions extracted in the longitudinal direction from a Penning discharge with a metal hydride cathode by reducing the anode-cathode distance is shown. The features of Н– ions emission have been revealed depending on the electric shift on the metal hydride cathode and the external magnetic field. The power parameters of the electromagnetic filter have been optimized for the separation of negative ions from the extracted flux of charged particles. The current of H– ion beam was obtained at the level of 16 μA with hydrogen supply only from the metal hydride cathode and at the level of 0.1 mA at external supply from the balloon.
APPLICATION OF DIELECTRIC BARRIER DISCHARGE AND PLASMA-CHEMICAL REACTOR FOR WATER PURIFICATION FROM NH4OH
Authors: Taran V.S. , Garkusha I.E. , Krasnyj V.V. , Taran A.V. , Lozina A.S. , Chechelnitskyi O.G. , Boldyriev I.M. , Romaniuk S.P.
Published: February 2021

Water purification from ammonium hydroxide was carried out by using two methods of processing: treatment with ozone generated by a dielectric barrier discharge (DBD) as well as processing in plasma-chemical reactor equipped with a water electrode and a diaphragm, where the main oxidation factors were OH hydroxyl radicals. The volume of the treated aqueous solution was 300 ml and the NH4OH concentration was 0.025 ml in both cases. The phenolphthalein test was used for visual analysis of the content of an aqueous solution of ammonia in water. The ozone concentration was about 5.8 mg/l in water with ozone injection from an ozone generator and 0.7 mg/l in a plasma-chemical reactor, respectively. The analysis of OH and NO radicals in the water-air gap of the plasmachemical reactor was carried out using a spectrometer operated in the range of 200...800 nm.
DC GAS BREAKDOWN AND TOWNSEND DISCHARGE IN CO2
Authors: Lisovskiy V.A. , Dudin S.V. , Platonov P.P. , Yegorenkov V.D.
Published: February 2021

We report the breakdown curves and current-voltage characteristics (CVC) of the Townsend mode DC discharge we have measured in carbon dioxide. We compare the breakdown curves measured with two different techniques. With the first technique we regard as breakdown voltage the maximum voltage which we can apply across the electrodes without igniting the discharge with fixed values of the inter-electrode distance and the gas pressure. With the second technique we register the CVC of the Townsend mode in the μA-mA range and then extrapolate them to zero current. We reveal that in the nA-μA range the CVCs of the Townsend mode may have a complicated behavior due to the formation of the space charge. Therefore the second technique furnishes incorrect values of the breakdown voltage.
DISCHARGE CHARACTERISTICS OF COMBINED LOW ENERGY ION
SOURCE – MAGNETRON SPUTTERING SYSTEM
Authors: Zykov A. , Yefymenko N. , Dudin S. , Yakovin S.
Published: February 2021

The discharge characteristics of a new combined low energy magnetron-ion-source sputtering system are presented. The ignition curves, current-voltage characteristics of the system in dependence on gas pressure, magnitude and topology of magnetic field have been researched both for autonomous operation of the planar magnetron discharge and Hall type ion source in plasma mode and for their combination. Spatial distributions of ion current are also presented.
PLASMA-SURFACE INTERACTION OF ELECTRIC ARC DISCHARGE
BETWEEN COMPOSITE Cu-Cr ELECTRODES
Authors: Murmantsev A. , Veklich A. , Boretskij V. , Bartlová M. , Dostál L. , Píška J. , Šimek D. , Gajdos A. , Tolochyn A.
Published: February 2021

In this work the plasma of electric arc discharges between Cu-Cr composite electrodes, which material were pressured and sintered at different temperatures 750 or 1050°С, are investigated by Optical Emission Spectroscopy (OES). The Scanning Electron Microscopy (SEM) with Energy-Dispersive X-ray Spectroscopy (EDXS) are used to study the working surface of electrodes, modified by thermal effect of breaking electrical arc in the air atmosphere. The erosion intensity of electrodes’ material due to plasma-surface interaction is estimated in indirect way by determination of metal vapours content in the discharge gap in an assumption of local thermodynamic equilibrium (LTE). The plasma composition is calculated in this case on the base of experimentally determined plasma
parameters: temperature and electron density.
HIGH-INTENSITY CESIUM ION BEAMS FOR HIBP DIAGNOSTICS
Authors: Krupnik L.I. , Barcala J. , Chmyga O.O. , Deshko G.M. , Drabinskiy M.A. , Eliseev L.G. , Hidalgo C. , Khabanov Ph.O. , Kharchev N.K. , Khrebtov S.M. , Komarov O.D. , Kozachok O.S. , Melnikov A.V. , Molinero A. , de Pablos J.L. ,   TJ-II team
Published: February 2021

The goal of the research is to expand the capabilities of the heavy ion beam probing (HIBP) diagnostic. HIBP is a unique diagnostic, capable to measure plasma potential, density and their fluctuations, as well as the poloidal magnetic field fluctuations in the core and edge plasmas. The sensitivity of the diagnostic is determined by the level of the output signal related to the instrumental noise. The level of the probing beam current should be as high as possible, especially for measurements at the periphery with low output signal due to low plasma density, and in the core, where the beam is attenuated due to the high plasma density. Optimization experiments have shown the possibility of ion beam forming in the current range from 40 to 800 µA.
HEAVY ION BEAM PROBING CONCEPTUAL DESIGN FOR THE
GLOBUS-M2 TOKAMAK
Authors: Khabanov Ph.O. , Melnikov A.V. , Minaev V.B. , Komarov A.D.
Published: February 2021

The paper discusses the application of the heavy ion beam probe (HIBP) diagnostic to the Globus-M2 spherical tokamak. Probing beam trajectory calculations were conducted to find the optimal position for HIBP primary and secondary beam-linesin the realistic machine geometry. Three configurations of the vacuum vessel ports of Globus-M2
were considered for the regime with toroidal magnetic field Btor=0.7 T and plasma current Ipl=0.5 MA. The optimal probing scheme with the widest area of the plasma cross-section covered by the detector grid was selected. For this scheme, the secondary beam-line was proposed.
EXCITATION TEMPERATURES IN PLASMA OF UNDERWATER
DISHARGES BETWEEN IRON GRANULES
Authors: Murmantsev A. , Veklich A. , Boretskij V.
Published: February 2021

This paper deals with development of optical emission spectroscopy techniques for diagnostic of underwater discharge plasma between iron granules. The difficulties in selection of iron spectral lines, as well as the approximation of their profiles for determination of excitation temperature are discussed. A method of spectral lines resolving with close wavelengths is considered. Simulation of a narrow rangeof the plasma emission spectrum is carried out to estimate the excitation temperatures in underwater discharge plasma.
Waste to Wealth Perspective: Identifying Waste Potentials for Small Scale Business Development in Ogun State, Nigeria
Authors: Adetola O. B , Odunlami D , Fasanmi S. A. , Yinusa G. O. , Adedeji I. A. , Solaja M. O. , Popoola D. , Ogede S. , Ogunbote O. , Sunmola B.
Published: February 2021

The paper addresses the possibility of wealth creation in the real sense of it beyond theoretical postulations, which abound from previous studies on waste in Nigeria. Among such previous studies referenced, majority did not delve into the real process of turning waste to wealth for the purpose of creating actual wealth. This study therefore intends to achieve actual wealth creation from waste by throwing entrepreneurial challenge to the indigenous talented and skillful individuals. The study discovered six ‘waste’ items, that is, maize husk, pure water nylon, banana stem, pineapple leaves, sisalina leaves and areca leaves that are convertible manually into new products such as maize-husk paper products; paving stones/slabs from pure water-nylon; banana stem, pineapple leaves and sisalina fibre for weaving products such as caps, bags, cloths, floor mats, table mats, decorations, and areca-leaves into -nut plates and spoons useful at parties, restaurants and bukas in Nigeria and Africa.
Newspaper Framing of Issues in the 1999 Yoruba-Hausa Inter-ethnic Conflict in Sagamu
Authors: Bello Semiu , Oso Lai
Published: February 2021

This study examines the characterisation of issues in the 1999 Yoruba-Hausa inter-ethnic conflict in Sagamu, south-western Nigeria. The occurrence of the1999 Yoruba-Hausa conflict in Sagamu had some historical significance. It was the first inter-ethnic conflict that occurred two months after the enthronement of democracy in Nigeria in 1999. Furthermore, it was the first inter-ethnic conflict between the Yoruba and the Hausa in Sagamu community after many centuries of peaceful co-existence. Therefore, the authors investigate how four major Nigerian national newspapers, National Concord, The Guardian, The Punch and Nigerian Tribune reported and characterised issues during this conflict. The study triangulates between indepth interview and content analysis research methods for data gathering in order to unpack issues embedded in the research questions. Theoretically, the study explicates framing theory given its relationship and appropriateness to the characterisation of issues in the selected newspapers in relation to the conflict. This study finds that the largest number of the stories analysed were characterised and framed around disunity and disintegration while death and economy dominate the themes that were reported in the selected newspapers over other themes. Therefore, the study concludes that, the strategic position of a newspaper is a considerable factor that should propel journalists to place high premium on social responsibility, public service and accountability in conflict reporting.
Aesthetics in Biripo Musical Performance
Authors: Omosule Segun
Published: February 2021

Music is a universal language. Biripo music, even when restricted to a group of people in the Ikale/Ilaje/Apoi milieux, is an embodiment of the consciousness of the folks that combines the art of the people with entertainment as a major cultural thrust, achieving religious indoctrination, and entrenching ethical values in the environment. This paper attempts an analysis of the musical performance of Zeblon Omoranmowo entitled: word hangs loose and bursts (Oro Ma Se Dugbe Dugbe o Be o) through an examination of the subject matter, themes and analogies that may constitute veritable sources of conflicts to the larger society and internal disquietude to individuals. The paper explores the stage performance through an examination of the persona, competence, interaction, talent and reception. While relying on aesthetics as a tool of explication, the study unveils the response of the audience finding expression in dancing, clapping and offer of monetary gift to band members and concludes that the musical performance fulfils the yearning of the folks for entertainment.
A Pragmatic Analysis of Selected Obituaries In Nigerian Newspapers
Authors: Akinbode Oluwole
Published: February 2021

Since the inception of Pragmatics as an independent approach to meaning has independent linguistic study, the approach to meaning has encountered an enormous change. Meaning has been perceived beyond the sentence level. The aim of this paper was to do a pragmatic analysis of selected obituaries in Nigerian newspapers; Nigerian Tribune, The Nation and The Punch. These papers were purposively selected because obituaries were regularly published and publicized through them in a mournful manner and this called for a critical linguistic study by analyzing the mournful use of language with a view to finding out their effects on the decoders. The study of language has been extended significantly beyond mere description of linguistic properties to the various ways which individual communicators convey meanings in different socio-cultural contexts. The theoretical framework for this study is pragmatics. This is because pragmatics has been able to account for social meanings and give new insights to the understanding of literary texts and thus, helping in formulating strategies for the teaching and learning of language. Three Nigerian newspapers namely Nigerian Tribune, The Nation and the Punch were purposively selected for data collection. Relevant texts on obituaries were extracted from them and were critically analyzed for the purpose of this study. It was found out that relatives and friends of the deceased publicized the death of the deceased as memories and sympathy for the departed souls. It is recommended that obituaries should be used for the teaching and learning of English as a Second Language because funerals and obituaries are a significant aspect of African culture.
Analysis of Savings and Investment Patterns Among Rural Farming Households in Yewa Division, Ogun State, Nigeria
Authors: Akerele E. O. , Akerele E. F. , Onasanya A. S. , Akomolede L. A. , Ilori A. R.
Published: February 2021

This study examined the analysis of savings and investment patterns among rural farming households in Yewa Division of Ogun State, Nigeria. The study was based on primary data obtained in a cross-section of 120 farming households drawn by multi- stage random sampling.Results showed that 44.2% were males with age bracket 31 – 40 years. The famers were mostly married 90.8% and 52.5% practice Islamic religion. The percentage of those that were educated was 64.2% and majority of these farmers (37.5%) had a farming experience of about 6-10years. The income level earned by these farmers was majorly between N20,000.00–N40,000.00 which is approximately (50%) of the entire sampled households.The Regression 2 Analysis of the determinants of savings among the respondents revealed an Adjusted R value of 0.579 which implies that 57.9% of the variation in dependent variable (Y) which is farm output is accounted for by the selection of socio-economic variables (X -X ) included in the model.Evidence from the study shows that 1 8 age, marital status and return on investment are statically significant in determining the investment pattern of the farmers in the survey area. It is therefore recommended that support should be given for the establishment of farm service centres reasonably close to the farmers, through which they may be able to gain access to modern inputs
The Efficacy of Chamomile (Matricaria chamomilla l.) Oil as a Promising Anaesthetic Agent for Two Freshwater Aquarium Fish Species
Authors: Can E. , Kizak V , Özçiçek E , Sehaneyildiz C
Published: February 2021

The efficacy of anesthetic chamomile oil (from Matricaria chamomilla L.) was evaluated in two freshwater aquarium fish species, Electric Blue Hap (Sciaenochromis fryeri) and Yellow Princess (Labidochromis caeruleus). Fish were exposed to ten concentrations of anesthetic (0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 ml/L). The optimal doses identified as 0.6 ml/L for deep anesthesia (A5) for both two species. The minimal sedative dose at the stage of loss of equilibrium (A3) was found to be 0.3 ml/L. The induction time generally decreased significantly with increasing concentrations of chamomile oil for all treatment groups. Recovery time tended to increase with increased chamomile oil at concentrations lower than 0.7 ml/L, but after this concentration it decreased. Chamomile oil proved to be effective as an anesthetic for both ornamental fish species. These findings suggest that chamomile oil is a promising anesthetic agent for aquaculture. However, further studies should be focused on species based investigations on the effect of temperature, transfer of fish, and their effect on antioxidant and oxidant status, in order to gather further information.