bluuebunny/crossref_metadata_2025 huggingface dataset:
WORK-LIFE BALANCE IN THE POST-PANDEMIC WORLD
Authors: Hoffmann-Burdzińska Kinga , Austen Agata
Published: March 2021

The new reality resulting from COVID-19 has introduced changes in the functioning of many organizations, which has an impact on their employees. Observation of management practice shows the growing importance of remote work, often employees are also more workload due to the absence of colleagues. The new situation may also be accompanied by a higher than usual level of employees’ uncertainty about their jobs, especially when the activities of their companies have been limited or suspended. All of this is likely to affect the work-life balance of the employees. Qualitative empirical research has been carried out to understand the possible consequences of a (post) pandemic on work-life balance. Presented research make presents the potential effects of the new situation for the area of work and life of employees and work-life balance and indicate possible future directions of research in this field.
ASSESSING ATTITUDES OF STUDENTS REGARDING E-LEARNING DURING PANDEMIC
Authors: Grzeszczyk Tadeusz A.
Published: March 2021

The purpose of this paper is to present the results of research on assessing attitudes of Polish universities’ students regarding e-learning in conditions of coronavirus induced pandemic. Appropriate research methods have been used to achieve this purpose, i.e.: participant observation, semi-structured interview and comparative analysis. As part of this research, the following research hypothesis was positively verified: the elimination of traditional face-to-face education methods, in connection with the pandemic, and the introduction of only e-learning systems, did not cause discouragement to continue education and did not significantly reduce student satisfaction. The limitations of this study include i.e. conducting research only at a technical university, relatively high risk of bias due to the use of participant observation and a relatively small research sample.
PURCHASE DECISIONS IN THE AGE OF CRISIS. IMPACT OF COVID-19 PANDEMIC ON CONSUMER CHOICES
Authors: Hofman-Kohlmeyer Magdalena
Published: March 2021

Recently, we are facing a global COVID-19 pandemic crisis, present in Poland from March 2020. Many scholars pointed out that the COVID-19 crisis is a new field of research opportunity. In present paper the author presented results of online survey amongst polish consumers conducted between August, 7 and August 28 (N=206). The author also compare declared consumer behavior at the outbreak of pandemic and declared consumer behavior after 6 months period of time. The results shows that at the beginning of pandemic in Poland, more than a half (60%) of people were afraid about financial stability. This number decreased during 6 months period to 40,3%. Second, the fear of losing a job or income caused that some people are more incline to save and limited their purchases but more often
at the outbreak of pandemic then at the time of survey. Also 36,4% of respondents confirmed that resign from some purchase during COVID-19 pandemic.
CONDUCTING PERSONAL SALE’S ACTIVITIES ON B2B MARKETS IN CONDITIONS OF CORONAVIRUS PANDEMIC – SELECTED ASPECTS
Authors: Pabian Aleksander
Published: March 2021

Integrated marketing communication can be used to sufficiently increase demand for goods and services that are provided by a company on b2b market. Promotional activities can effectively influence decisions of potential institutional buyers by providing information, arguments, promises and prompting to buy or use promoted products and services. Promotional messages are also used to create a positive opinion about an enterprise or institution. One of the classic instruments of integrated communication is personal selling. It seems that in the conditions of the spread of the pathogen causing COVID-19 disease, the possibilities of using this tool are limited. In the article, however, the author presents a model whose implication can allow the benefits of the tool while maintaining security standards. The basis for consideration was a systematic review of the literature as well as an interview conducted using indirect communication with managers of companies that use the promotional tool characterized in the article on a daily basis.
Źródła inspiracji w architekturze. Cz. 1. METAFORA
Authors: Kossak Anna
Published: March 2021

W temacie poszukiwania źródeł inspiracji w architekturze metafora pełni kluczową, bo podwójną rolę. Z jednej strony bowiem sama (będąc osadzona -– z racji swej natury, ale i tradycyjnego jej postrzegania -– w świecie poezji, literatury, jak i mowy potocznej), może być niebanalnym źródłem inspiracji niebezpośredniej (abstrakcyjnej). Z drugiej strony stanowi podstawowe narzędzie do implikacji innych źródeł inspiracji niebezpośrednich (czyli tych spoza źródeł bezpośrednich, ściśle związanych z architekturą) do środowiska architektonicznego. Artykuł stanowi próbę przedstawienia skompensowanych informacji dotyczących jej definicji, formy, funkcji, interakcyjnej koncepcji metafory i jej znaczenia dla nauki oraz myślenia kreatywnego. Porusza problematykę funkcji metafory w architekturze, począwszy od procesu dydaktycznego po życie zawodowe architekta.
RELATO DE CASO: SÍNDROME NEUROLÉPTICA MALIGNA
Authors: Gardin Talissa Nakada , Medeiros Beatriz Gadel , Zacharias Raquel , Baracat Felipe Iankelevich
Published: March 2021

To report the case of a patient with bipolar affective disorder (BPD) in psychiatric care, who was diagnosed three times with Neuroleptic Malignant Syndrome by different antipsychotics (NMS). A 57-year-old female patient with previous diagnosis of BD was admitted to the hospital with fever, muscle stiffness, tremors, behavioral changes, lowering of consciousness level, increased CPK and leukocytosis, which were not clarified by another medical condition, then suspected of Neuroleptic Malignant Syndrome. The use of antipsychotics is essential for several psychiatric disorders, such as mania, personality disorders and dementia in general, and the onset of NMS is unpredictable. It is concluded that a depth knowledge of the disease is necessary for early diagnosis and treatment, which will result a better prognosis.
Thick-Section Epoxy Composites
Authors: Hou Yanan , Li Liguo , H. Koo Joseph
Published: March 2021

Thick-section composites (TSC) are extensively demanded in many fields, such as aerospace, wind energy, and oil and gas industries. However, the manufacturing process of thick-section thermoset composites (TSSC) encounters significant complexities, such as variations of nonuniform resin flow, exothermal reaction and curing, and dimensional stability through the thickness direction. These process-related nonuniformities are expected to result in through-thickness gradients of mechanical properties and curing-induced deformations, leading to undesirable residual stresses and damage. This chapter introduces the application of TSC and issues related to its manufacturing processes. Methods of TSC are examined and analyzed. Fundamental characteristics of curing kinetics, thermal transfer, and residual stress in TSC will be explained. Research of detailed experiments will be referred for readers for further studies.
Real-Time Capable Sensor Data Analysis-Framework for Intelligent Assistance Systems
Authors: H.P. Fischer Ulrich , Hoppstock Sabrina , Kußmann Peter , Steuding Isabell
Published: March 2021

In the industrialized countries, the very old part of the population has been growing rapidly for many years. In the next few years in particular, the age cohort over 65 will increase significantly. This goes hand in hand with illnesses and other physical and cognitive limitations. In order to enable these people to remain in their own homes for as long as possible despite physical and cognitive restrictions, technologies are being used to create ambient assisted living applications. However, most of these systems are neither medically verified nor are latencies short enough, for example, to avoid falls. In order to overcome these problems, a promising approach is to use the new 5G network technology. Combined with a suitable sensor data analysis frame work, the fast care project showed that a real-time situation picture of the patient in the form of an Avatar could be generated. The sensor structure records the heart rate, the breathing rate, analyzes the gait and measures the temperature, the VOC content of the room air, and its humidity. An emergency button has also been integrated. In a laboratory demonstrator, it was shown that the infrastructure realizes a real-time visualization of the sensor data over a heterogeneous network.
The Impact of Exchange Rates on Stock Markets in Turkey: Evidence from Linear and Non-Linear ARDL Models
Authors: Çakır Mustafa
Published: March 2021

In this chapter we investigate the asymmetric impact of exchange rates on three major stock market indices in Turkey using four different ARDL models between 2003M1 and 2018M12. This chapter also attempts to differentiate the short-run and the long-run relationship between exchange rates and stock market indices namely BIST All shares, BIST National 100 index, and BIST National 30 index. Our motivating question is whether the relationship between exchange rates and three major stock market indices are symmetric or asymmetric in Turkey? To answer this, we first use the linear bivariate and multivariate models assuming the effects are symmetric. We then use the non-linear bivariate and multivariate models to examine whether exchange rate have symmetric or asymmetric effects on selected stock stock market indices in Turkey. The findings show that exchange rates have asymmetric effects on all three major stock market indices both in the short and long run. When we look at the long-run, the currency appreciation has positive and significant impact on selected stock markets but currency depreciation does not have an effect. This finding is in line with the understanding that Turkish sectors heavily depends on the import of raw and intermediate goods. The results also show that the economic activity has positive and significant effects on all stock markets implying that it is the main determinant in the long-run. Moreover, interest rates and volatility index were negative and significant in all markets. Thus, it has important implications for policy makers to provide stable prices and diverse investors.
Diversité des outils et des activités de percussionà la fin du MIS 9 dans le niveau 6 d’Orgnac 3(Ardèche, France)
Authors: MATHIAS Cyrielle , VIALLET Cyril , MOIGNE Anne-Marie
Published: March 2021

Layer 6 of Orgnac 3 corresponds to a cave occupation, dated to the end of MIS 9. It yielded numerous lithic and paleontological remains, and witnesses of diverse hominin activities. This paper aims to consider percussive activities from both lithic material and fauna, according to a technological and traceologicalological analysis. Knapping activities are dominant, based on the presence of hammerstones and retouchers (from bone and lithic materials). Recycling phenomena were also highlighted, with cores used as hammerstones. A flake-bulb presents also typical wear marks due to its use as retoucher (“éclat à bulbe piqueté”). These phenomena are usual during the Middle Palaeolithic and are here presented from the first stages of these lithic techno-complexes. Among the shaped pieces, a chopper bears macro-wear marks typical of use in launched percussion on a non-mineral hard material (bone?). Herbivorous remains present anthropic fractures for marrow extraction, diaphysis fragments being further punctually used as retouchers. Percussive activities have an important role in prehistoric lifeways (knapping activities, acquisition and transformation of raw materials linked to subsistence). The diversity of the percussive tool-kit testifies to a technological specialisation, while recycling shows the hominins adaptive skills to their environment.
Philadelphia and the Delaware Valley: A Geographically Distributed and Expanding Life Science Ecosystem
Authors: Gross Dennis
Published: March 2021

Philadelphia has been considered by many to be the birthplace of the modern US pharmaceutical industry with Merck & Co. Inc.’s research division Merck Research Labs [originally called MSDRL] based in West Point and GSK’s primary US labs [originally SKF] now based in Collegeville. The City of Philadelphia is also home to two of the oldest medical schools in the US: Perelman School of Medicine at the University of Pennsylvania founded in 1765 and the Sydney Kimmel Medical College [formerly Jefferson Medical College] founded in 1824. The conjunction of those two touchpoints along with the other big pharma players, e.g., Johnson & Johnson/Janssen and emerging biotech entities in the wider Delaware Valley region is significant. Also noteworthy is the presence of other research intensive universities such as Drexel University, Temple University, Jefferson University and research institutes such as the Wistar Institute, Fox Chase Cancer Center [associated with Temple University School of Medicine], Lankenau Institute, Monell Chemical Senses Center and the Coriell Institute in Southern New Jersey.
The Effect of Schema-Based Instruction in Solving Mathematics Word Problems: An Emphasis on Prealgebraic Conceptualization of Multiplicative Relations
Authors: Xin Yan Ping
Published: March 2021

The purpose of this study was to examine the effects of a schema-based instructional strategy that emphasizes prealgebraic conceptualization of multiplicative relations on solving arithmetic word problems with elementary students with learning disabilities or problems (LP). Participants were 4 fifth graders with LP in a Midwestern urban public elementary school. An adapted multiple-probe-across-participants design was employed to assess the functional relation between the schema-based instructional strategy instruction and students' performance while solving word problems. The results of the study demonstrated the effectiveness of the schema-based instructional strategy with elementary students with LP. Introducing symbolic representation and algebraic thinking in earlier grades may facilitate a smoother transition from elementary to higher level mathematics learning and improve middle and high school mathematics performance.
Book Review: We Know More Than We Can Tell A Review of the Second Handbook of Research on Mathematics Teaching and Learning
Authors: Dossey John A.
Published: March 2021

Second Handbook of Research on Mathematics Teaching and Learning: A Project of the National Council of Teachers of Mathematics. (2 volumes). Frank K. Lester Jr. (Ed.) (2007). Charlotte, NC: Information Age Publishing, 1363 pp. ISBN 978-1-59311-176-2 (pb) $350.00 (U.S.) per set. ISBN 978-1-59311-177-9 (hb) $499.00 (U.S.) per set.
Violencia de género, seguridad de las víctimas desde la perspectiva psicosocial
Authors: Yugueros García Antonio Jesús
Published: March 2021

La violencia de género (Ley Orgánica 1/2004), constituye un problema social grave, ya que atenta contra los Derechos Humanos de las víctimas: mujeres y sus hijos e hijas, además, en el ámbito familiar impide una convivencia sana, perjudicando notablemente el desarrollo evolutivo de los menores. La familia, que debería ser para estos chicos y chicas un ambiente adecuado de socialización, cuando existen episodios de este tipo de violencia, puede causar en ellos problemas graves de diversa índole. Ante ello, para una intervención más eficaz con estas personas, los profesionales de los distintos ámbitos sociales: Psicología, Trabajo Social, Educación, Sanitario, Fuerzas de Seguridad y otros, deberán actuar de manera coordinada, ya que es una problemática multidisciplinar.

Con este trabajo se pretende, por un lado, visibilizar los sistemas de seguridad existentes en la actualidad en España, y por otro, proporcionar a los profesionales del ámbito de lo social antes descritos, que intervienen directamente con las víctimas de violencia de género, herramientas para que puedan informarles sobre estas medidas de seguridad, materia que les afecta considerablemente y, además, coadyuvaría a que se sientan más empoderadas para poder reclamar la asistencia que necesitan, al objeto de poder salir de la situación adversa en la que se encuentran.

Gender violence (Organic Law 1/2004) constitutes a serious social problem, since it violates the Human Rights of the victims: women and their sons and daughters, in addition, in the family environment, prevents healthy coexistence, notably damaging the evolutionary development of minors. The family, which should be an adequate socialization environment for these boys and girls, when there are episodes of this type of violence, can cause serious problems of various kinds for them. Given this, for a more effective intervention with these people, professionals from the different social areas: Psychology, Social Work, Education, Health, Security Forces and others, must act in a coordinated way, since it is a multidisciplinary problem.

This work aims, on the one hand, to make visible the security systems currently existing in Spain, and on the other, to provide the professionals in the social field described above, who intervene directly with victims of gender-based violence , tools so that they can inform them about these security measures, a matter that affects them considerably and, in addition, would help them feel more empowered to claim the assistance they need, in order to be able to get out of the adverse situation in which they find themselves .
Letteratura femminile in mitteleuropa. Un breve confronto tra scrittrici ebree, triestine e austriache
Authors: Neiger Giovanna
Published: March 2021

Il contributo che scrittrici triestine e austriache di origine ebraica hanno rispettivamente offerto alla cultura otto-novecentesca è oggetto del presente lavoro.

Si sono prese in esame e sottoposte ad analisi comparativa le opere di autrici ebree triestine e di altrettante scrittrici ebree austriache.

Tra le triestine, la cui identità ebraica si è affievolita, vi sono autrici che hanno svolto attività giornalistica, manifestato aspirazioni irredentistiche, scritto opere per un pubblico femminile e per l’infanzia, che non hanno superato l’usura del tempo. Diversamente dalle colleghe triestine, talune scrittrici austriache, femministe, giornaliste, pedagogiste o attiviste politiche hanno scritto testi che a tutt’oggi offrono spunti di riflessione. 

The object of this work is the contribution offered to the culture of XIX and XX centuries by women writers from Trieste and Austria.The works by Jewish authors from Trieste and Austria have been examined and a comparative analysis has been carried out.Among the women writers from Trieste, whose identity was wakened, there are authors who carried out journalism, shown irredentism aspiration, wrote works for women and for children that didn’t overcome the passing of time. Unlike other colleagues from Trieste, some Austrian authors, who were feminists, journalists, pedagogists or political activists, wrote some text that, even nowadays, are offering some reflections
Las mujeres y las ingenierías
Authors: Lucas Bermúdez María José , Kahale Carrillo Djamil Tony , Miguel Hernández Beatriz
Published: March 2021

Es necesario reflexionar sobre la preocupación existente de por qué las mujeres prefieren carreras de tipo Sanitario, Ciencias Sociales o Jurídicas a las carreras  STEM, acrónimo de Science, Technology, Engineering and Mathematics. Son varias las cuestiones que debemos plantearnos para entender cuáles son los motivos por los cuales las mujeres prefieren estas carreras a las carreras STEM, entre ellos, se encuentran  la cuestión cultural; por otro lado, están los estereotipos establecidos desde el nacimiento, el papel que juega el entorno familiar en el apoyo que puedan  encontrar, el que juegan los centros educativos. Resulta fundamental que desde los institutos los orientadores y el profesorado apoyen a las chicas a estudiar aquellas disciplinas; otra cuestión es la falta de referentes femeninos y la visibilidad que se le da a la mujer científica, así como su reconocimiento, incluso la discriminación laboral existente frente a los hombres, o la baja posibilidad de conciliación de la vida laboral y personal en el entorno industrial.  Por tanto, es primordial motivar a las adolescentes al fomentar las vocaciones STEM y para ello es necesario establecer políticas encaminadas a impulsar dichas vocaciones, divulgar y dar a conocer mujeres científicas, matemáticas, ingenieras o arquitectas.

It is necessary to reflect on the existing concern as to why women prefer careers in Health, Social Sciences or Law to STEM careers, an acronym for Science, Technology, Engineering and Mathematics. There are several questions that we must ask ourselves in order to understand the reasons why women prefer these careers to STEM careers, among them, the cultural question; on the other hand, there are the stereotypes established from birth, the role played by the family environment in the support they can find, the role played by educational centers. It is essential that from the institutes the guidance counselors and teachers support girls to study those disciplines; another issue is the lack of female references and the visibility given to women scientists, as well as their recognition, even the existing labor discrimination against men, or the low possibility of reconciling work and personal life in the industrial environment.  Therefore, it is essential to motivate teenage girls by promoting STEM vocations and for this it is necessary to establish policies aimed at promoting such vocations, disseminating and making known women scientists, mathematicians, engineers or architects.
Forord
Authors: Bro Henning
Published: March 2021

Denne bog er skrevet af Henning Bro, udgives som et temanummer af det digitale tidsskiftet METROPOL, som udgives af Metropolhistorisk Netværk, og udlægges som METROPOL 2021, nr. 1. i følgende dele:

 Indledning

DEL I: De historiske forudsætninger

DEL II: Sommerhusbyer: Mellemkrigstid og 40´erne

DEL III: Sommerhusbyernes storhedstid: Første efterkrigstid

DEL IV: Planlagt sommerhusbyer: Sidste efterkrigstid

Hovedkonklusion

APPENDIX

 Styregruppen for Metropolhistorisk Netværk
Indledning
Authors: Bro Henning
Published: March 2021

Indledning til temanummret af METROPOL 2021, nr. 1
DEL II: Sommerhusbyer: Mellemkrigstid og 40´erne
Authors: Bro Henning
Published: March 2021

Del II belyser hovedstadsmetropolens sommerhusbyer i mellemkrigstiden og 40, de regionale udfordringer, der fulgte deraf, og hvorledes offentlige myndigheder forsøgte at inddæmme dem.
Hovedkonklusion m.m.
Authors: Bro Henning
Published: March 2021

Denne del omfatter hovedkonklusion samt oversigt over anvendt litteratur og kildemateriale
Les lieux du Capital
Authors: Clain Olivier
Published: March 2021

Les distinctions entre les travaux particuliers et le travail général, d’une part, et entre la plus-value et les formes particulières de l’accroissement de la valeur, d’autre part, constituent deux innovations théoriques majeures du Capital. L’article examine leur portée dans la critique de l’économie politique classique et illustre la thèse selon laquelle elles attestent d’un déplacement des topoï du discours dialectique qui concernent le lieu d’effectuation du procès dialectique et le statut des idéalités, celui des idéalités théoriques en particulier. Il montre que dans l’ensemble de l’oeuvre ces déplacements touchent également les opérateurs du discours dialectique que sont la négation, la contradiction, l’unité de l’identité et de la différence ou encore la manière de différencier les moments du procès dialectique. Bref l’article pose que l’avancée théorique de Marx consista à reconfigurer le noyau dialectique de la critique. Il soutient que c’est par là qu’il serait destiné à demeurer notre contemporain.
Ar nanoizmēra dzelzs oksīdiem uzlabota inovatīva alkīda emulsijas kompozīcija termiski modificētas koksnes aizsardzībai āra apstākļos
Authors:   , Sansonetti Errj
Published: March 2021

Koksnei piemīt liels potenciāls lietošanai āra apstākļos, taču vides faktoru (saules starojums, mitrums, sēnes, kukaiņi utt.) iedarbības rezultātā tās virsma var viegli degradēties. Koksnes aizsardzība ir ļoti aktuāls pētījuma temats, un tas ir arī šī promocijas darba objekts. Galvenais darba mērķis ir iegūt emulsijas veida alkīda pārklājumu uz ūdens bāzes, uzlabot tā kompozīciju ar nepieciešamām piedevām, īpaši ar nanoizmēra sarkanā dzelzs oksīda pigmentu, kas var nodrošināt termiski modificētas koksnes dekoratīvo īpašību saglabāšanu āra ekspluatācijas laikā. Darbā zinātniskās literatūras apskatā apkopota informācija par galvenajiem koksnes noārdīšanos izraisošiem faktoriem un to ietekmi uz koksnes struktūru un īpašībām. Apskatīti koksnes aizsardzībai paredzētu pārklājumu veidi un izaicinājumi jaunu pārklājumu izstrādāšanā, kas radušies stingrāku noteikumu dēļ, kas ievērojami ierobežo organisko šķīdinātāju lietošanu un atbalsta zaļākas alternatīvas, piemēram, pārklājumus uz ūdens bāzes. Eiropā to nosaka Direktīva 2004/42/EC par gaistošo organisko savienojumu (GOS) saturu ierobežojumiem krāsās un pārklājumos. Pirmajā darba eksperimentālajā daļā pētīta optimāla alkīda emulsijas kompozīcija un piedevu ietekme uz pārklājuma plēves īpašībām. Ņemtas vērā izmaiņas termiski modificētas koksnes ķīmiskajās un fizikālajās īpašībās, salīdzinot ar nemodificētu koksni. Pēc termiskās modifikācijas koksne kļūst hidrofobāka, un šīs izmaiņas noteiktas un analizētas, mērot virsmas enerģijas. Rezultāti parādīja, ka, paaugstinoties termiskās modifikācijas temperatūrai, samazinās koksnes virsmas enerģijas polārais komponents. Otrajā darba eksperimentālajā daļā veikti mākslīgās un āra novecināšanas testi, lai noteiktu piemērotāko sarkanā dzelzs oksīda nanodaļiņu koncentrāciju, kas var nodrošināt labāko termiski modificētas koksnes aizsardzību pret fotodegradāciju. Rezultāti liecina, ka 8 % sarkanā dzelzs oksīda pigmentu koncentrācija ir efektīva koksnes virsmas aizsardzībai pret krāsas izmaiņām. Āra novecināšanas testa laikā alkīda emulsijas efektivitāte tika pārbaudīta, salīdzinot to ar alkīda pārklājumu uz šķīdinātāja bāzes. Rezultāti apstiprina, ka alkīda emulsija dod labāku termiski modificētas koksnes virsmas aizsardzību nekā pārklājums uz šķīdinātāja bāzes. Tas pierāda, ka, aizvietojot organisko šķīdinātāju ar ūdeni, var iegūt līdzvērtīgu produktu ar līdzīgu vai labāku efektivitāti termiski modificētas koksnes aizsardzībai āra ekspluatācijā.
On a class of quartic Diophantine equations
Authors:   Urmia University, Izadi F. , Baghalaghdam M. ,   Azarbaijan Shahid Madani University, Kosari S. ,   Guangzhou University
Published: March 2021

In this paper, by using elliptic curves theory, we study the quartic Diophantine equation (DE) { \sum_{i=1}^n a_ix_{i} ^4= \sum_{j=1}^na_j y_{j}^4 }, where a_i and n\geq3 are fixed arbitrary integers. We try to transform this quartic to a cubic elliptic curve of positive rank. We solve the equation for some values of a_i and n=3,4, and find infinitely many nontrivial solutions for each case in natural numbers, and show among other things, how some numbers can be written as sums of three, four, or more biquadrates in two different ways. While our method can be used for solving the equation for n\geq 3, this paper will be restricted to the examples where n=3,4. Finally, we explain how to solve more general cases (n\geq 4) without giving concrete examples to case n\geq 5.
The character sum of polynomials with k variables and two-term exponential sums
Authors:   Xi’an Innovation College of Yan’an University, Xu Xiaoling , Zhang Jiafan ,   Northwest University, Zhang Wenpeng ,   Northwest University
Published: March 2021

The main purpose of this paper is using the properties of the classical Gauss sums and the analytic methods to study the computational problem of one kind of hybrid power mean involving the character sums of polynomials with k variables and the two-term exponential sums, and give an identity and asymptotic formula for it.
On Münchhausen numbers
Authors:   Brno University of Technology, Kureš Miroslav
Published: March 2021

The remarkable property of the number 3435, namely 3435 = 3^3 + 4^4 + 3^3 + 5^5, was formalized to the notion of Münchhausen numbers. Properties of these numbers are studied and it is showed that although there are only finitely many Münchhausen numbers in a given base b, there are infinitely many Münchhausen numbers of the length 2 in all bases. A certain reversion in the definition gives the notion of so-called anti-Munchhausen numbers, search for them is computationally more effective.
A note on Mersenne Padovan and Perrin numbers
Authors:   Purdue University Northwest, Kafle Bir , Rihane Salah Eddine ,   Abdelhafid Boussouf University, Togbé Alain ,   Abdelhafid Boussouf University
Published: March 2021

In this paper, we determine all the Mersenne numbers which are in the sequences of Padovan and Perrin numbers, respectively.
On new arithmetic function relative to a fixed positive integer. Part 1
Authors:   EDPNL & HM Laboratory, ENS of Kouba, Algiers, Algeria, Mittou Brahim , Derbal Abdallah ,   EDPNL & HM Laboratory, ENS of Kouba, Algiers, Algeria
Published: March 2021

The main purpose of this note is to define a new arithmetic function relative to a fixed positive integer and to study some of its properties.
Bi-unitary multiperfect numbers, IV(b)
Authors:   Tampere University, Finland, Haukkanen Pentti , Sitaramaiah Varanasi
Published: March 2021

A divisor d of a positive integer n is called a unitary divisor if \gcd(d, n/d)=1; and d is called a bi-unitary divisor of n if the greatest common unitary divisor of d and n/d is unity. The concept of a bi-unitary divisor is due to D. Surynarayana (1972). Let \sig^{**}(n) denote the sum of the bi-unitary divisors of n. A positive integer n is called a bi-unitary multiperfect number if \sig^{**}(n)=kn for some k\geq 3. For k=3 we obtain the bi-unitary triperfect numbers. Peter Hagis (1987) proved that there are no odd bi-unitary multiperfect numbers. The present paper is part IV(b) in a series of papers on even bi-unitary multiperfect numbers. In parts I, II and III we considered bi-unitary triperfect numbers of the form n=2^{a}u, where 1\leq a \leq 6 and u is odd. In part IV(a) we solved partly the case a=7. We proved that if n is a bi-unitary triperfect number of the form n=2^{7}.5^{b}.17^{c}.v, where (v, 2.5.17)=1, then b\geq 2. We then solved completely the case b=2. In the present paper we give some partial results concerning the case b\ge 3 under the assumption 3\nmid n.
Action detection using a neural network elucidates the genetics of mouse grooming behavior
Authors: Geuther Brian Q , Peer Asaf , He Hao , Sabnis Gautam , Philip Vivek M , Kumar Vivek
Published: March 2021

Automated detection of complex animal behaviors remains a challenging problem in neuroscience, particularly for behaviors that consist of disparate sequential motions. Grooming is a prototypical stereotyped behavior that is often used as an endophenotype in psychiatric genetics. Here, we used mouse grooming behavior as an example and developed a general purpose neural network architecture capable of dynamic action detection at human observer-level performance and operating across dozens of mouse strains with high visual diversity. We provide insights into the amount of human annotated training data that are needed to achieve such performance. We surveyed grooming behavior in the open field in 2457 mice across 62 strains, determined its heritable components, conducted GWAS to outline its genetic architecture, and performed PheWAS to link human psychiatric traits through shared underlying genetics. Our general machine learning solution that automatically classifies complex behaviors in large datasets will facilitate systematic studies of behavioral mechanisms.
Cortical astrocytes independently regulate sleep depth and duration via separate GPCR pathways
Authors: Vaidyanathan Trisha V , Collard Max , Yokoyama Sae , Reitman Michael E , Poskanzer Kira E
Published: March 2021

Non-rapid eye movement (NREM) sleep, characterized by slow-wave electrophysiological activity, underlies several critical functions, including learning and memory. However, NREM sleep is heterogeneous, varying in duration, depth, and spatially across the cortex. While these NREM sleep features are thought to be largely independently regulated, there is also evidence that they are mechanistically coupled. To investigate how cortical NREM sleep features are controlled, we examined the astrocytic network, comprising a cortex-wide syncytium that influences population-level neuronal activity. We quantified endogenous astrocyte activity in mice over natural sleep and wake, then manipulated specific astrocytic G-protein-coupled receptor (GPCR) signaling pathways in vivo. We find that astrocytic Gi- and Gq-coupled GPCR signaling separately control NREM sleep depth and duration, respectively, and that astrocytic signaling causes differential changes in local and remote cortex. These data support a model in which the cortical astrocyte network serves as a hub for regulating distinct NREM sleep features.
Kinetic analysis of ASIC1a delineates conformational signaling from proton-sensing domains to the channel gate
Authors: Vullo Sabrina , Ambrosio Nicolas , Kucera Jan P , Bignucolo Olivier , Kellenberger Stephan
Published: March 2021

Acid-sensing ion channels (ASICs) are neuronal Na+ channels that are activated by a drop in pH. Their established physiological and pathological roles, involving fear behaviors, learning, pain sensation, and neurodegeneration after stroke, make them promising targets for future drugs. Currently, the ASIC activation mechanism is not understood. Here, we used voltage-clamp fluorometry (VCF) combined with fluorophore-quencher pairing to determine the kinetics and direction of movements. We show that conformational changes with the speed of channel activation occur close to the gate and in more distant extracellular sites, where they may be driven by local protonation events. Further, we provide evidence for fast conformational changes in a pathway linking protonation sites to the channel pore, in which an extracellular interdomain loop interacts via aromatic residue interactions with the upper end of a transmembrane helix and would thereby open the gate.
Tri-Band Slot-Loaded Microstrip Antenna for Internet of Things Applications
Authors: Refaat S. Mohamed , Abdalaziz A. , Hamad E. K. I.
Published: March 2021

A new design of a multiband microstrip patch antenna using slots in the patch as well as defected ground structures (DGS) implemented in the ground plane is proposed. Multi resonance response was obtained by etching the DGS shapes in the ground plane of a Traditional patch operates at 5.2 GHz, which is the common frequency for the Internet of Things (IoT) applications. The novel outcome of this work is a compact antenna that resonates at three bands, viz. 2.42, 5.22 and 5.92 GHz. Different shapes of slots were used to improve the antenna performance at the different resonances. The antenna used the inset feeding technique to improve impedance matching. Rogers RO3003 substrate of 3 relative dielectric constant, 0.0013 loss tangent, and 1.5 mm thickness was used to build the antenna. The designed antenna was simulated using HFSS software. The good consistency between simulations and measurements confirmed the antenna's ability to improve the benefits for IoT applications at the three different frequencies.
A Case of Pseudoepitheliomatous Keratotic and Micaceous Balanitis with Verrucous Carcinoma
Authors: Yang Yu-hua , Chen Ren-he , Zhang Ru-zhi
Published: March 2021

Pseudoepitheliomatous Keratotic and Micaceous Balanitis (PKMB) is a rare chronic inflammatory disease characterised by hardened, hyperkeratotic plaques on the glans of the penis of older men. Although PKMB is described as benign, there is growing evidence that it has the potential to become cancerous. authors hereby report a case of 55 year old male who was initially characterised by white sclerosis and atrophy at the glans. Without treatment, verrucous keratinising organisms appeared after two years and were misdiagnosed as viral warts. The patient received four cryotherapy treatment with liquid nitrogen, which completely removed the warts, but the rash recurred about two months after cryotherapy. The patient received histopathological examinations which showed obvious hyperkeratosis with incomplete keratosis in the epidermis, papilloma-like and pseudoepithelioma-like hyperplasia appeared in the spinous layer, flattening of rete ridges, squeezing growth into the dermis, disordered arrangement of basal cells and frequent mitoses. A few squamous masses were seen in the dermis and the formation of squamous fossa could be seen.There were more lymphocyte infiltrations in the superficial layer of the dermis and around blood vessels. After being diagnosed with PKMB with verrucous carcinoma, the patient finally chose to undergo surgery in the Urology Department of another hospital. Unfortunately, we lost the follow-up. Our case supports the view that PKMB can develop into a malignant disease, which suggests that early detection, treatment and follow-up of the disease are essential.
Farro 57 Rice Cultivar: A Comparative Study of the Nutritional Composition of its Parboiled Milled Rice, Brown Rice and Germinated Brown Rice
Authors: Ukpong E. S. , Onyeka E. U. , Omeire G. C. , Ogueke C.
Published: March 2021

This work analyzed the nutritional composition of germinated brown rice (GBR)  produced from FARRO 57 rice cultivar and compared it with that of ungerminated brown rice (UBR) and ungerminated parboiled milled/white rice (UWR) from the same cultivar which were used as controls. The aim was to evaluate and compare the nutritional composition of UBR, UWR and GBR of the rice cultivar. The experimental design used was a completely randomized design. GBR was produced by soaking brown rice grains in distilled water for 24 h and then made to germinate in a laboratory incubator at 35° C for 12, 24 and 36 h. The parameters determined included proximate composition, energy value, minerals, vitamins, total starch, amylose and total reducing sugar contents and they were determined in triplicates. It was found that GBR had significantly higher contents of protein (14.54-15.01%), ash (3.36.98%), total dietary fibre (9.23-9.31), phosphorus (130.55-187.15 mg/100 g), iron (6.22-9.94 mg/100 g), calcium (455.0-560.0 mg/100 g), zinc (2.51-2.72 mg/100 g), selenium (92.10-107.50 µg/100 g), vitamin B2 (2.35-2.92 mg/100 g) and vitamin E (1.82-2.68 mg/100g) than UBR and UWR. Furthermore, there was no significant difference between the contents of vitamins A (19.45-19.72 IU), B1 (0.33-0.34 mg/100g) and B6 (1.00-1.10 mg/100g) of GBR and UBR samples, however they were all significantly higher than that of UWR. The GBR also had significantly lower amount of total carbohydrate (64.21-71.09%), total starch (54.91-60.92%), amylose (22.05-28.14%), and total reducing sugar (5.14-11.23%) than UBR and UWR. Amongst the GBR samples, the ash, protein, and the minerals increased with increase in duration of germination while the total carbohydrate, starch and amylose decreased with increase in duration of germination. GBR was recommended over UBR and UWR due to its optimum levels of the nutrients.
Hydrochemical Characterization of Groundwater Quality in Nkalagu District, Southeastern Nigeria
Authors: Onwe I. M. , Akudinobi B. E. B. , Chizoba C. J. , Ifeanyichukwu K. A.
Published: March 2021

Hydrochemical characterization of groundwater quality in Nkalagu District, southeastern Nigeria was carried to determine the main factors controlling the chemistry of groundwater and its suitability for drinking and irrigation purposes. Sixty (60) groundwater samples collected from boreholes and hand-dug wells in different parts of the area were analyzed for a range of physiochemical parameters and heavy metal constituents. The results show that concentration of the major ions were in the order Cl->HCO3->SO42->NO3- and Na>Ca2+>Mg2+>K+. The groundwater samples are slightly acidic with pH of 5.28 to 8.04; moderately hard with TH of 112.88 to 467.78 mg/l. The district is mainly controlled by carbonate and silicate mineral weathering based on the available result. Three main flow regimes were identified with Q-mode cluster analysis. Based on the WQIanalysis results, the groundwater quality in the district was classified, generally as ‘poor’ to ‘excellent’ for drinking purpose. Groundwater quality for drinking purpose were noted to deteriorates as one move from west towards the east of the district, while the north and south part pf the study area indicated the best quality in the district. Groundwater quality for irrigation purpose showed excellent quality based on the United States Salinity Laboratory and Wilcox diagrams. For future use of groundwater resource in the district we recommend implementation rules and guidelines in the area to enhance health and preserve groundwater sources in the district.
The Effects of Different Natural Anesthesia on Survival of Juvenile Sang kuriang Catfish (Clarias gariepinus) on Closed Wet System Transportation
Authors: Almumtaz Mukhammad Rifqi , Haetami Kiki , Grandiosa Roffi , Lili Walim
Published: March 2021

This research aims to understand the effect of the different natural anesthesia on the survival rate of sangkuriang catfish juvenile which was transported using closed wet system fish transportation. We discussed selected natural anesthesia for effectiveness, induction times and recovery times in the application of anesthesia for transportation. The benefits of this research were as a reference to choose the best natural anesthesia for catfish juvenile transportation. This research used the experimental method on Completely Randomized Design (CRD) with 4 treatments (clove oil, nutmeg oil, lemongrass oil, and control) with 3 replications. Measured parameters were survival rate after fish transportation, survival rate after aquaculture for 7 days, induction times, recovery times,and water quality such as temperature, dissolved oxygen (DO), pH, and ammonia. The result was clove oil had high survival rate after fish transportation and cultivated for 7 days which is 98,67% and 87,33%. This treatment had quicker time for induction of catfish juvenile than other treatments which was 12.59 minutes although recovery time (10.34) minute was assumed lower than other treatments.
The Effect of using Fine Bubbles (FBS) on the Growth of Catfish Seeds (Pangasianodon hypopthalmus) with Different Stocking Density on Aquaponic System Using Fine Bubble
Authors: Bahtiar Rafli , Iskandar . , Rosidah . , Hamdani Herman
Published: March 2021

This study aims to determine the stocking density that can increase the survival rate of catfish seeds and to analyze the growth rate of catfish seeds in aquaponics systems using FBs. The catfish seeds used in this study were 4-5 cm in size with a weight of 0.5-1.0 g. The types of plants used were ground water spinach from the seedlings themselves and the FBs used had a pressure of 5.5 atm. The method used was an experimental method with a completely randomized design consisting of treatment A 375 fish, treatment B 450 fish, treatment C 525 fish, and treatment D 600 fish with a volume of water of each treatment is 150 L. Catfish seeds were maintained for 35 days. The results of statistical tests showed no significant difference and SR was also not significantly different. Statistically, the aquaponics system using FBs was able to support stocking densities of up to 600 individuals/150 L.
Assessment of the Knowledge and Practice of Handwashing among Healthcare Workers in a Tertiary Hospital in Ekiti, Southwestern Nigeria
Authors: Oyekale Oluwalana Timothy , Adegbile Samsudeen Adeniran , Ojo Oluwatosin Bola , Oguntunmbi Damilola Esther , Oyekale Oluwatoyin Ige
Published: March 2021

Background: The most common means of transmission of Healthcare-Associated Infections (HAIs) is the contaminated hand of Healthcare Workers (HCWs), proper handwashing by HCWs is the best method of halting this transmission, however, there is poor adherence to the practice of the simple handwashing procedure in many health facilities.

Aims: To assess the knowledge and practice of proper handwashing, to identify the factors impeding adherence to its good practice among HCWs and to identify the handwashing and hand drying facilities available to these HCWs.

Study Design: This is a descriptive cross-sectional study.

Place and Duration of Study: The study was carried out at Federal Teaching Hospital, Ido-Ekiti (FETHI), Southwestern Nigeria between July 2020 and December 2020.

Methods: The study involved 328 randomly selected HCWs. Data was collected using pretested self administered questionnaires, entered into Microsoft Excel 2016 and analyzed by SPSS version 23.

Results: Only 31.10% of respondents had good knowledge of handwashing while 80.18% had good practice of handwashing. Longer stay in service and being a doctor or nurse were associated with good knowledge and good practice of handwashing. Only 16.46% of respondents had previous training on handwashing within 3 years prior to this study. Previous training on handwashing was associated with good knowledge of handwashing (P=.001). Up to 68.60% of respondents used stored water and soap for handwashing. The most common hand drying facility reported in the study was common towel, no respondent ever used paper towel. The most common reason given for poor adherence to handwashing practices was the busy schedule.

Conclusion: Hospital managers must prioritize the regular provision of handwashing and hand drying facilities for their centre, in addition to organizing regular hand hygiene training for HCWs, to improve their knowledge and practice of handwashing and thus reduce the rate of HAIs
Forage Value of Some Popcorn (Zea mays L. everta) Genotypes
Authors: Oktem Abdullah , Kahramanoglu Yıldız
Published: March 2021

In this study, it was aimed to determine forage yield and yield characteristics of some popcorn (Zea mays L. everta) genotypes and find out the using possibilities of popcorn as a feed material. Study was carried out during the second crop growing season under Sanliurfa, Turkey climatic conditions in 2017. The experiment was designed complete randomized blocks design with three replicates. In the research 13 popcorn new genotypes were used as a crop material. In the study, tassel flowering duration values ranged from 52.0 day to 58.0 day, plant height from 161.23 cm to 210.20 cm, leaf number from 11.16 to 13.90 number ear-1, stem diameter from 21.12 mm to 25.39 mm. Also, another characteristic such as height of fist ear value values were between 74.1 cm and 111.4, biomass yield between 5092.9 kg da-1 and 8069.28 kg da-1. Dry matter yield values varied from 1812.28 to 3333.54 kg da-1, harvest index from 17.72% to 41.64%. When the plant height, biomass yield and dry matter yield values evaluated together for forage value of popcorn genotypes it was determined that 5YTR1305, AYCİN R-997, KUM1347 and 235EAD05 popcorn genotypes was found better than others. It was observed that biomass yield in popcorn plant reached 8 tons da-1 and dry matter yield over 3 tons da-1. It has been seen that popcorn can be used as a feed source for livestock animals.