bluuebunny/crossref_metadata_2025 huggingface dataset:
Differences of Salivary Ph, Feature, And Volume Of Children At Three Kindergartens With Different Socioeconomic Standard
Authors: Suwargiani Anne Agustina , Wardani Riana , Putri Fidya Meditia , Jasrin Tadeus Arufan , Sasmita Inne Suherna
Published: December 2020

Introduction: Saliva is the most important biological factor to protect against dental caries. When saliva flow is reduced, oral health problems such as dental caries and oral infections can develop. It was suggested that the effect of low salivary pH is more in plaque close to the area of susceptible tooth surface. The presence of saliva in pre-school age children is a significant indicator in oral health assessment oral health. There has been an association between salivary cortisol and socioeconomic variable. Descriptions above have encouraged us to examine the salivary pH, feature, and volume of pre-school-aged community. Thus, this study was aimed to describe the differences in salivary pH, feature, and volume of the children in the three pre-school with different location and socioeconomics aspect. Methods: Descriptive survey, with a population of preschool students in 3 different kindergartens with different socioeconomic environment. Inclusion criteria were the pre-school-aged community and got permission from parents. Exclusion criteria were a pre-school-aged community under medication treatment causes hyposalivation or hypersalivation and children who did not want to be involved in the study, with total sampling as the sampling technique, resulted in as much a 101 respondents as the study sample. The saliva was collected with unstimulated technique. Data analysis was performed using relative frequency distribution. Results: The salivary pH was slightly higher in male children than female by 0.1. The average pH value was 7.25. The salivary feature was mostly frothy bubbly, followed by thin and watery, and the sticky bubbly feature was found the least. The salivary volume of the pre-school-aged community was mostly in the very less category, followed by the less category, with no normal category was found. the p-values of salivary pH and salivary features were below 0.05 There are no significant differences between the salivary pH and salivary feature of children from the three studied kindergartens. However, there is a significant difference in the salivary volume found in children from kindergartens located in high socioeconomic standard and middle socioeconomic standard areas, which have a higher salivary volume than the children from kindergartens situated in areas with lower socioeconomic standard. Conclusion: since the reduced salivary volume was associated to children with lower socioeconomic standard, this association can justify the higher risk for caries described in the literature.
KEYWORDS
Salivary pH; Salivary feature; Salivary volume; Pre-school-aged children.
Terapias adicionais a plasmaférese como tratamento da púrpura trombocitopênica trombótica
Authors: Do Amaral Azevedo Brunna Rafaela , De Souza Mota Isabella , Júnior Milton Rego de Paula
Published: December 2020

A púrpura trombocitopênica trombótica (PTT) é uma doença rara que possui caráter adquirido ou congênito, tendo como características intrínsecas a ambas a oclusão difusa da microcirculação por trombos, distúrbios neurológicos, trombocitopenia, disfunção renal e anemia hemolítica microangiopática. A fisiopatologia da PTT é ocasionada pela presença de multímeros de Fator de Von Willebrand (FvW) de alto peso molecular e deficiência da metaloprotease ADAMTS13. As terapias para o PTT variam entre a infusão de plasma fresco congelado (PFC) ou plasma de 24 horas para corrigir a deficiência da ADAMTS13, plasmaférese para retirada de dos multímeros e autoanticorpos anti-ADAMTS13, pulsoterapia com corticoides, utilização de anticorpos monoclonais quiméricos visando a diminuição da produção de autoanticorpos, e anticorpos específicos para FvW.
Residências Artisticas Presenças - ações performáticas
Authors: Frange Lucimar Bello
Published: December 2020

O presente texto aborda as ações de fazer bolhas de sabão, consideradas como ações performáticas, e realizadas durante a quarentena de 2020. São atos de re-existências mantendo a vida em prosseguimento. As conexões são com poetas, filósofos e artistas trabalhados como exercício dessa práxis inventiva na arte contemporânea.
Towards Intelligent E-Learning Systems: A Hybrid Model for Predicatingthe Learning Continuity in Iraqi Higher Education
Authors: Kadhim Mohammed K. , Hassan Alia K.
Published: December 2020

E-Learning system gains a great attention in the past years; with advance of the internet and the information exchange techniques the importance to merge the traditional learning means with the internet-based learning methods became a must especially in Iraq, the Iraqi higher education is now coping with the new information and communication technologies and adopting a modern methods for upgrading their education and learning ways. There are great efforts to blend E-Learning systems with the educational process, in order to fulfill this purposes the proposed research is advancing E-Learning systems by suggesting a hybrid method that combines two Artificial Intelligence Techniques (AI) inside the design and the development of an intelligent E-Learning system for computer science department at university of technology. The utilization of Artificial Neural Networks algorithm (ANNs) especially Recurrent Neural Networks (RNN) is a way of implementing deep learning technique to predict the students' final out comes in virtual class room based on their grades and their learning behaviors. RNN is optimized by utilizing ADAM optimizer to lift the accuracy of the proposed algorithm, the dataset are gathered and processed to suite the education purposes and was divided into80% for training the model and 20% for testing the model, the results of the hybrid model are compared with other machine learning methods like Multi-Layer Perceptron (MLP), decision tree, naïve Bayesian, and random forest using WEKA environment, the results of the proposed model showed a promising accuracy when compared with the mentioned machine learning algorithms.
Effect of Interpersonal Communication and Motivation on Employee Work Effectiveness in BAPPEDA, Karawang Regency
Authors: in Sihabud , Mulyadi Dedi
Published: December 2020

This study aimed to determine, analyze, and explain the effect of interpersonal communication and motivation on work effectiveness at BAPPEDA Karawang Regency. Quantitative descriptive analysis methods, scale techniques, and path analysis, with the results of research, conducted it can be concluded:interpersonal Communication, in general, went well, motivation, in general, went well, work effectiveness of employees, in general, went well, the correlation coefficient between interpersonal communication and motivation has a correlation value of 0.352, the level of this relationship is included in the low criteria, but the value is positive, this means that if Interpersonal Communication is getting better, then the motivation of employees will also be better, the partial influence of interpersonal communication partially on work effectiveness of 0.369 or 36.9% which is a contribution from the direct effect of 0.5342 = 0.285 and indirect contribution of 0.534 x 0.352 x 0.445 = 0.084. While the partial influence of motivation on work effectiveness is 0.282, or 28.2% which is a contribution from the direct effect of 0.4452 = 0.198 and indirect contribution of 0.534 x 0.352 x 0.445 = 0.084, the simultaneous influence of Interpersonal communication and motivation on work effectiveness is 0.651 or 65.1% which is a contribution of partial influence of interpersonal communication on work effectiveness of 0.369 or 36.9% and the effect of partial motivation on effectiveness work of 0.282, or 28.2%, the remaining 34.39% is the contribution of other variables (ε) that are not examined.
The Principle of Consensualism and Freedom of Contract as a Reflection of Morality and Legal Certainty of Contract Laws in Indonesia
Authors: zi Tarmi
Published: December 2020

Differences in the civil law system in each country will substantially distinguish the legal principles adopted and the regulation of the treaty law. This study seeks to analyze the principles of law that exist in Indonesia in ensuring certainty in the implementation of contracts as a derivation of treaty law. In general, the basic principles of treaty law have been legalized in various forms of regulations and in the national legal system. Taking various perspectives on the main theories on justice and expediency, this study originally focused on the state's authority to guarantee the rights of citizens in agreements. The results of the study revealed that the principle of consensualism relating to the birth of the contract, the principle of freedom of contract relating to the contents of the contract and the principle of binding force relating to the effect of the contract of principles in carrying out the agreement absolutely must be fulfilled if the parties agree to bind themselves in carrying out legal actions.
Effective Job Execution in Hadoop Over Authorized Deduplicated Data
Authors: Thanekar Sachin Arun , Subrahmanyam K. , Bagwan A.B.
Published: December 2020

Existing Hadoop treats every job as an independent job and destroys metadata of preceding jobs. As every job is independent, again and again it has to read data from all Data Nodes. Moreover relationships between specific jobs are also not getting checked. Lack of Specific user identities creation and forming groups, managing user credentials are the weaknesses of HDFS. Due to which overall performance of Hadoop becomes very poor. So there is a need to improve the Hadoop performance by reusing metadata, better space management, better task execution by checking deduplication and securing data with access rights specification. In our proposed system, task deduplication technique is used. It checks the similarity between jobs by checking block ids. Job metadata and data locality details are stored on Name Node which results in better execution of job. Metadata of executed jobs is preserved. Thus by preserving job metadata re computations time can be saved. Experimental results show that there is an improvement in job execution time, reduced storage space. Thus, improves Hadoop performance.
Entrepreneurial Resilience and Performance of an Organization: A Survey of Small and Medium Enterprises in Asaba, Delta State, Nigeria
Authors: Emueje Ibini , Olannye Henry Odigwe , Olanye A.P.
Published: December 2020

Resilience is a vibrant process of adaptation which enables entrepreneurs to constantly direct a futuristic aspiration despite the volatile conditions of a market. The study examined entrepreneurial resilience on the performance of small and medium enterprises organization in Asaba, Delta State. The cross-sectional research survey research design method was employed. The study adopted the stratified random sampling technique. The sample size used was limited to 201 respondents. A structured questionnaire was the research instrument employed in the study. Descriptive statistics as well as multiple regression analysis was used to analyse the data collected. Findings showed overwhelmingly that resourcefulness, strategic diversity and pro-activeness has a substantial positive relationship with organizational performance. The study concluded that entrepreneurial resilience has a positive effect on organizational performance. The study result showed that resourcefulness has the highest affirmative effect on organizational performance. Thus, the study recommended that if enterprises understand the nature of the association amid the dimensions of entrepreneurial resilience, the failure rate of small and medium enterprises can be reduced.
A Low Computational Complexity Algorithm of PTS Technique for PAPR Reduction in the 4G and 5G Systems
Authors: Mugher Raghda Abdulbaqi
Published: December 2020

The (OFDM) defined as orthogonal multiplex frequency distribution system is very popular of the design of waveforms for high speed data communication in 4G wireless technology. In addition, a filter-based waveform design, such as filtered OFDM (F-OFDM), has been proposed as a candidate for the 5G technology waveform in order to overcome the current weaknesses of OFDM. And 5G requirements. The high average peak ratio (PAPR) is taken as the main obstacle to OFDM and remains an inherent problem with F-OFDM since both systems support orthogonal transmission. In this study, a new efficient algorithm called groupings of complex variants of PTS (G-C-PTS) was proposed to reduce the level of high complexity in PTS. G-C-PTS can significantly reduce complexity with a slight decrease in PAPR performance compared to traditional PTS. In addition, comparisons were made between (OFDM) and (F-OFDM) systems based on the GC-PTS algorithm for PAPR, bit error rate (BER) and spectral power density (PSD) to validate the proposed algorithm. Partial transmit sequence (PTS) procedure is considered one of the production strategies to decrease the high peak-to-average power ratio (PAPR) in the 4G waveform plane, for example multiplex frames for symmetric repetition division (OFDM).
Performance of Indonesia's World-Class University Efficiency with Bibliometrics (Scientific Strength) Approach and Data Envelopment Analysis
Authors: Ibrahim Cecep , Fadhli Rahmat
Published: December 2020

University efficiency is one of the scientific measurement methods for evaluating the effectiveness and use of educational resources available explicitly to the productivity of research publications. This study aims to determine the university's efficiency, between the number of researchers /authors owned by the university and the amount of Scientific Strength (publications and citations) produced by universities in Indonesia with the data envelopment analysis. The universities in this study are nine universities in the top 1000 Qs world universities in 2020. This research method consists of problem identification, data collection, data processing, results, and discussion. The research data obtained from Scopus.com metadata in publication and citation data and the year limited from 2017-2019. While the data of active university researchers/authors obtained from the Higher Education Science and Technology Index and actual student data obtained from PDDikti data. Data were analyzed using the bibliometric approach (scientific strength) and the data envelopment analysis approach. This study analyzed 41869 Indonesian scientific works indexed by Scopus with a bibliometric approach (scientific strength) and data envelopment analysis. This study indicatesthat the highest efficiency values are the University of Indonesia and Diponegoro University with an efficiency value of 1,000 while the lowest efficiency value is IPB University with an efficiency value of 0.060.
Wybrane aspekty ograniczenia obrotu nieruchomościami rolnymi w prawie polskim w kontekście unijnej zasady swobody przepływu kapitału
Authors: Wojciechowski Paweł
Published: December 2020

Celem rozważań jest dokonanie oceny dopuszczalności ograniczeń w obrocie nieruchomościami rolnymi uregulowanych w ustawie o kształtowaniu ustroju rolnego w kontekście unijnej zasady swobody przepływu kapitału. W artykule przedstawione zostały zjawiska ekonomiczne i klimatyczne jakie mają miejsce na świecie, a w szczególności w UE, które powodują, że wprowadzanie rozwiązań prawnych ograniczających obrót nieruchomościami wydaje się nieuniknione. Omówiona została unijna zasada swobody przepływu kapitału, w tym przesłanki dopuszczalności ograniczenia tej zasady. W świetle tych ustaleń dokonana została ocena instrumentów, które ograniczają obrót nieruchomościami rolnymi, do których zalicza się przede wszystkim zasada nabywania nieruchomości rolnych przez rolników indywidualnych, zasada nakazująca prowadzenie gospodarstwa rolnego na nabywanej nieruchomości rolnej przez okres 5 lat i wprowadzająca zakaz zbywania nabytej nieruchomości w tym czasie bez uzyskania zgody dyrektora generalnego KOWR oraz prawo pierwokupu i nabycia przysługujące KOWR. Przeprowadzona w artykule analiza prowadzi do wniosku, że większość przyjętych rozwiązań przechodzi pozytywnie wypracowany w orzecznictwie TSUE test dopuszczalności wprowadzania ograniczeń, chociaż niektóre z tych ograniczeń budzą wątpliwości.
La Directiva (UE) 2019/633, en materia de prácticas comerciales desleales por una cadena de suministro agricola y alimentario más equilibrada
Authors: Sánchez Hernández Ángel
Published: December 2020

La Directiva (UE) 2019/633 representa una clara intervención de la UE en las prácticas comerciales desleales en las relaciones entre empresas en la cadena de suministro agrícola y alimentario, adoptando normas imperativas que prohíben determinadas prácticas comerciales desleales en la Cadena Alimentaria: retraso en el pago de productos agroalimentarios ya entregados, cancelación unilateral tardía de un pedido o su modificación retroactiva, el rechazo del comprador a formalizar por escrito un contrato con el proveedor, el uso incorrecto de información confidencial, amenazar al proveedor con dejar de comprar sus productos o rechazar los pagos si el poseedor presenta alguna reclamación, solicitar compensaciones económicas en caso de deterioro o pérdida de los productos una vez entregados, a menos que ese deterioro se deba a una negligencia del proveedor.
Recapitulation of stability diversity of microbial α-amylases
Authors: Gangadharan Dhanya , Jose Anu , Nampoothiri K. Madhavan
Published: December 2020

α-Amylases from a huge number of sources have been isolated and characterised but very few of them meet the demands of the industries. The industrial processes take place under conditions hostile to biocatalysts thus increasing the industrial demand for a highly stable enzyme in good titre level. Improved understanding of biomolecular aspects of α-amylases has led to the advanced understanding of their catalytic nature. Enzymes with high stability are obtained from extremophiles. Extensive studies have demonstrated the importance of regulating expression and catalytic efficiency of nonextremophiles through genetic engineering, directed evolution and chemical modifications. The inability to culture most microorganisms in the environment by standard methods has also led to the focus on the development of metagenomics for getting improved biocatalytic functions. The present review aims to compile the studies reported by researchers in manipulating nonextremophiles and improving stability through directed evolution, metagenomics and protein engineering.
BOOKS FOR FUTURE: Die Zukunft gestalten – nachhaltig!
Authors: Engel Karolina , Sailer Andrea
Published: December 2020

Dieser Beitrag zu den Zielen der Agenda 2030 beschreibt das mit dem Qualitätssiegel „Projekt Nachhaltigkeit 2020“ ausgezeichnete Konzept der Stadtbibliothek Homburg zur Erfüllung der Nachhaltigkeitsziele. Der Fokus liegt auf Angeboten für verschiedene Altersgruppen und in der Vernetzung mit den Schulen im Einzugsgebiet. Gleichzeitig werden Materialien konzipiert, die alle Lehrer des Bundeslandes für den Unterricht im Bereich „Bildung für nachhaltige Entwicklung“ ausleihen können.
Eine lohnende Mammutaufgabe – Rahmenbedingungen der digitalen Filmbenutzung im Bundesarchiv
Authors: Heftberger Adelheid
Published: December 2020

Dieser Beitrag beschreibt die momentan vorhandenen Möglichkeiten der digitalen Nutzung des Filmarchivs im Bundesarchiv, die aktuellen Entwicklungen der internen Filmdigitalisierung sowie das im Oktober 2020 anlaufende Projekt zur systematischen Rechteklärung. Neben der Digitalisierung werden weitere, damit zusammenhängende Aspekte der Online-Präsentation eines Filmbestands angerissen, z. B. die Notwendigkeit der Einbindung von Normdaten, die Entwicklungen im Bereich Linked Open Data und wie medienübergreifende Visualisierung die Zugänglichmachung von Archivbeständen im Bundesarchiv für Nutzer*innen in Zukunft unterstützen könnte.
The traceback method and the early constructicon: theoretical and methodological considerations
Authors: Koch Nikolas , Hartmann Stefan , Quick Antje Endesfelder
Published: December 2020

Usage-based approaches assume that children’s early utterances are item-based. This has been demonstrated in a number of studies using the traceback method. In this approach, a small amount of “target utterances” from a child language corpus is “traced back” to earlier utterances. Drawing on a case study of German, this paper provides a critical evaluation of the method from a usage-based perspective. In particular, we check how factors inherent to corpus data as well as methodological choices influence the results of traceback studies. To this end, we present four case studies in which we change thresholds and the composition of the main corpus, use a cross-corpus approach tracing one child’s utterances back to another child’s corpus, and reverse and randomize the target utterances. Overall, the results show that the method can provide interesting insights—particularly regarding different pathways of language acquisition—but they also show the limitations of the method.
From ODE to Open Markov Chains, via SDE: an application to models for infections in individuals and populations
Authors: Esquível Manuel L. , Patrício Paula , Guerreiro Gracinda R.
Published: December 2020

We present a methodology to connect an ordinary differential equation (ODE) model of interacting entities at the individual level, to an open Markov chain (OMC) model of a population of such individuals, via a stochastic differential equation (SDE) intermediate model. The ODE model here presented is formulated as a dynamic change between two regimes; one regime is of mean reverting type and the other is of inverse logistic type. For the general purpose of defining an OMC model for a population of individuals, we associate an Ito processes, in the form of SDE to ODE system of equations, by means of the addition of Gaussian noise terms which may be thought to model non essential characteristics of the phenomena with small and undifferentiated influences. The next step consists on discretizing the SDE and using the discretized trajectories computed by simulation to define transitions of a finite valued Markov chain; for that, the state space of the Ito processes is partitioned according to some rule. For the example proposed for illustration, the state space of the ODE system referred – corresponding to a model of a viral infection – is partitioned into six infection classes determined by some of the critical points of the ODE system; we detail the evolution of some infected population in these infection classes.
On some innovations in teaching the formal semantics using software tools
Authors: Steingartner William
Published: December 2020

In this work we discuss the motivation for innovations and need of a teaching tool for the visualization of the natural semantics method of imperative programming languages. We present the rôle of the teaching software, its design, development and use in the teaching process. Our software module is able to visualize the natural semantics evaluation of programs. It serves as a compiler with environment that can visually interpret simple programming language Jane statements and to depict them into a derivation tree that represents the semantic method of natural semantics. A formal definition of programming language Jane used in the teaching of formal semantics and production rules in natural semantics for that language are shown as well. We present, how the presented teaching tool can provide particular visual steps in the process of finding the meaning of well-structured input program and to depict complete natural-semantic representation of an input program.
Selected tools for Java class and bytecode inspection in the educational environment
Authors: Dobravec Tomaž
Published: December 2020

Java is not only a modern, powerful, and frequently used programming language, but together with Java Virtual Machine it represents a novel dynamic approach of writing and executing computer programs. The fact that Java programs are executed in a controlled environment has several important implications that define the nature of the language and makes it different from the traditional C-like languages. Knowing the detailed differences between the two types of languages and execution environments is a part of the holistic education of a computer engineer.

In this paper, we present some behind-the-scene details about the Java Virtual Machine and we show how these details could be used in the educational process to demonstrate the differences and to emphasise the advantages of the dynamic programming approach when compared to the static one. After presenting some information about class files and about the internal structure and operation of the Java Virtual Machine we demonstrate the usage of public domain programs that could be used in the educational process to put these theoretical concepts into practice.
Non-invasive detection and discrimination of breast tumors at early stage using spiral antenna
Authors: Singh Rukmani , Priye Vishnu
Published: December 2020

In this paper, an Archimedean spiral antenna-based biosensor has been proposed for the early detection of breast tumor. By monitoring the variation of S11 over 1–3.5 GHz frequency range, the proposed scheme can identify the tumor location, as well as distinguish the types of tumor (benign or malignant) based on shapes and dielectric properties contrast. To validate the concept, full wave simulation using CST microwave suite are performed along with VNA based experimental measurements on breast phantoms and tumors, prepared by easily available materials like glass, petroleum jelly, mixture of water and wheat flour. The demonstrated device is able to detect the tumor of less than 1 mm in radius and positioned anywhere in 5 × 5 × 5 cm of breast fat. The proposed method is easy to use, low cost, safe, comfortable, non-invasive and non- ionizing in nature.
From practical nurse to bachelor of nursing student: bridging the transition
Authors: Chachula Kathryn M. , Hyndman Kathryn J. , Smith Mary E.
Published: December 2020

Background

A streamlined academic approach for career advancement is needed that allows practical or enrolled nurses to obtain a Bachelor of Nursing (BN) degree. One strategy in this approach is offering college-prepared Practical Nurses (PNs) the opportunity to transition into a baccalaureate program through a bridging course. Bridging initiatives serve as professional development opportunities for learners with personal growth and financial advantages on degree completion and enhance health and human resources for health care systems within national and international landscapes.

Objective and methods

A curricular model and strategies on how such a bridging course can be constructed are discussed in this article. The model integrates teaching and learning strategies as well as course sequencing, structure, and assessment strategies.

Results and conclusion

This innovative bridging curriculum offers Canadian and international nurse educators a programmatic guideline to create educational pathways for practical or enrolled nurses to obtain a baccalaureate degree. Completion of the bridging curriculum and BN program allow graduates to assume the RN role following a successful pass on the National Council Licensure Examination (NCLEX).
Analytical predictor–corrector entry guidance for hypersonic gliding vehicles
Authors: Chen Huatao , Zhao Kun , Guirao Juan L.G. , Cao Dengqing
Published: December 2020

For the entry guidance problem of hypersonic gliding vehicles (HGVs), an analytical predictor–corrector guidance method based on feedback control of bank angle is proposed. First, the relative functions between the velocity, bank angle and range-to-go are deduced, and then, the analytical relation is introduced into the predictor–corrector algorithm, which is used to replace the traditional method to predict the range-to-go via numerical integration. To eliminate the phugoid trajectory oscillation, a method for adding the aerodynamic load feedback into the control loop of the bank angle is proposed. According to the quasi-equilibrium gliding condition, the function of the quasi-equilibrium glide load along with the velocity variation is derived. For each guidance period, the deviation between the real-time load and the quasi-equilibrium gliding load is revised to obtain a smooth reentry trajectory. The simulation results indicate that the guidance algorithm can adapt to the mission requirements of different downranges, and it also has the ability to guide the vehicle to carry out a large range of lateral maneuvers. The feedback control law of the bank angle effectively eliminates the phugoid trajectory oscillation and guides the vehicle to complete a smooth reentry flight. The Monte Carlo test indicated that the guidance precision and robustness are good.
Streamlining IoT system development with open standards
Authors: Korkan Ege , Kaebisch Sebastian , Steinhorst Sebastian
Published: December 2020

The Internet of Things (IoT) is bringing Internet connectivity to a wide range of devices which results in an increasing number of products for smart home, industry 4.0 and/or smart cities. Even though IoT has the ambition to reach an increasing amount of devices and be scalable across different domains, lack of interoperability inhibits this scope to be attained. Recent standardization efforts by the World Wide Web Consortium (W3C) are addressing the interoperability problem by the means of Thing Description (TD) that allows humans and machines to understand the capabilities and communication interfaces of IoT devices. In this paper, we show a more systematic and streamlined development of IoT devices and systems that relies on the TD standard. We introduce three different complementary methods that can be applied independently in the different stages of the development, or as a framework to streamline the development of IoT devices and systems. As a result of using the TD standard, interoperability between IoT devices of various stakeholders is ensured from early stages and the time to market is reduced.
Extensions of coefficient estimates for new classes of bi-univalent functions defined by Sǎlǎgean integro-differential operator
Authors: Páll-Szabó Ágnes Orsolya
Published: December 2020

In this paper, we introduce and investigate three new general classes of bi-starlike and bi-convex functions of Ma–Minda type defined by the Sǎlǎgean integro-differential operator. Bounds of the first three coefficients

|

a
2

|

{\lvert a_{2}\rvert}

,

|

a
3

|

{\lvert a_{3}\rvert}

and

|

a
4

|

{\lvert a_{4}\rvert}

are given.
On the stabilisers of points in groups with micro-supported actions
Authors: Francoeur Dominik
Published: December 2020

Given a group 𝐺 of homeomorphisms of a first-countable Hausdorff space 𝒳, we prove that if the action of 𝐺 on 𝒳 is minimal and has rigid stabilisers that act locally minimally, then the neighbourhood stabilisers of any two points in 𝒳 are conjugated by a homeomorphism of 𝒳.
This allows us to study stabilisers of points in many classes of groups, such as topological full groups of Cantor minimal systems, Thompson groups, branch groups, and groups acting on trees with almost prescribed local actions.
Cell – extracellular matrix interaction in glioma growth. In silico model
Authors: Kalinin Vladimir
Published: December 2020

The study aims to investigate the role of viscoelastic interactions between cells and extracellular matrix (ECM) in avascular tumor growth. Computer simulations of glioma multicellular tumor spheroid (MTS) growth are being carried out for various conditions. The calculations are based on a continuous model, which simulates oxygen transport into MTS; transitions between three cell phenotypes, cell transport, conditioned by hydrostatic forces in cell–ECM composite system, cell motility and cell adhesion. Visco-elastic cell aggregation and elastic ECM scaffold represent two compressible constituents of the composite. Cell–ECM interactions form a Transition Layer on the spheroid surface, where mechanical characteristics of tumor undergo rapid transition. This layer facilitates tumor progression to a great extent. The study demonstrates strong effects of ECM stiffness, mechanical deformations of the matrix and cell–cell adhesion on tumor progression. The simulations show in particular that at certain, rather high degrees of matrix stiffness a formation of distant multicellular clusters takes place, while at further increase of ECM stiffness subtumors do not form. The model also illustrates to what extent mere mechanical properties of cell–ECM system may contribute into variations of glioma invasion scenarios.
Conditional stability in a backward Cahn–Hilliard equation via a Carleman estimate
Authors: Shang Yunxia , Li Shumin
Published: December 2020

We consider a Cahn–Hilliard equation in a bounded domain Ω in

ℝ
n

{\mathbb{R}^{n}}

over a time interval

(
0
,
T
)

{(0,T)}

and discuss the backward problem in time of determining intermediate data

u
⁢

(
x
,
θ
)

{u(x,\theta)}

,

θ
∈

(
0
,
T
)

{\theta\in(0,T)}

,

x
∈
Ω

{x\in\Omega}

from the measurement of the final data

u
⁢

(
x
,
T
)

{u(x,T)}

,

x
∈
Ω

{x\in\Omega}

. Under suitable a priori boundness assumptions on the solutions

u
⁢

(
x
,
t
)

{u(x,t)}

, we prove a conditional stability estimate for the semilinear Cahn–Hilliard equation

∥

u
⁢

(
⋅
,
θ
)

∥

L
2

⁢

(
Ω
)

≤

C
⁢

∥

u
⁢

(
⋅
,
T
)

∥

H
2

⁢

(
Ω
)

κ
0

,

\lVert u(\,\cdot\,,\theta)\rVert_{L^{2}(\Omega)}\leq C\lVert u(\,\cdot\,,T)%
\rVert_{H^{2}(\Omega)}^{\kappa_{0}},

and a conditional stability estimate for the linear Cahn–Hilliard equation

∥

u
⁢

(
⋅
,
θ
)

∥

H
β

⁢

(
Ω
)

≤

C
⁢

∥

u
⁢

(
⋅
,
T
)

∥

H
2

⁢

(
Ω
)

κ
1

,

\lVert u(\,\cdot\,,\theta)\rVert_{H^{\beta}(\Omega)}\leq C\lVert u(\,\cdot\,,T%
)\rVert_{H^{2}(\Omega)}^{\kappa_{1}},

where

θ
∈

(
0
,
T
)

{\theta\in(0,T)}

,

β
∈

(
0
,
4
)

{\beta\in(0,4)}

and

κ
0

,

κ
1

∈

(
0
,
1
)

{\kappa_{0},\kappa_{1}\in(0,1)}

. The proof is based on a Carleman estimate with the weight function

e

2
⁢
s
⁢

e

λ
⁢
t

{\mathrm{e}^{2s\mathrm{e}^{\lambda t}}}

with large parameters

s
,
λ

∈

ℝ
+

{s,\lambda\in\mathbb{R}^{+}}

.
Full duplex dispersion compensating system based on chromatic dispersion in analog RoF links
Authors: Dileep Deyitha , Sindhu Supriya S. , Zacharias Joseph
Published: December 2020

Radio over Fiber technology is a promising solution for next-generation wireless communication networks. In radio over fiber systems, signal distortions caused by modulator nonlinearity is a major concern. In this paper, a full duplex dispersion compensating system using chromatic dispersion is proposed. A system using 16 QAM OFDM signal transmission is presented. Distortion compensation is observed when a required amount of dispersion is added. Bit Error Rate (BER) and constellation diagrams for different amount of dispersion are analyzed and its comparison is presented. Since the framework utilizes just a single persistent wave laser for upstream and downstream transmission the base station is additionally disentangled and it diminishes the general framework cost. Signal distortions are reduced when the dispersion is adjusted to 640 ps/nm for uplink transmission and 760 ps/nm for downlink transmission.
Measuring clock jitter and data signals for bit error detection in optical transceiver systems
Authors: Eid Mahmoud M. A. , Rashed Ahmed Nabih Zaki , Kabir Md. Anowar , Hassan Md. Mehedi
Published: December 2020

This work demonstrates how to measure jitter using the eye diagram Analyzer histogram feature. Bit sequence generator is employed with the NRZ Pulse generator with the electrical jitter in order to measure the signal amplitude level. We have modulated the light signal from CW Laser with the electrical signal by Mach-Zehnder Modulator through 5 km fiber cables. The signal can be amplified with a gain of 7 dB with the presence of transimpedence amplifier. The combination of electrical signal and signal from noise source can be filtered by using the low pass Gaussian filter.
Prepubescent unilateral gynecomastia secondary to excessive soy consumption
Authors: Sea Jessica L. , Abramyan Mikayel , Chiu Harvey K.
Published: December 2020

Objective

We present a case of an unusual cause of prepubertal gynecomastia.

Case Presentation

Enlargement of breast tissue in males, or gynecomastia, is a rare condition in prepubescent boys. We describe an 8-year-old male who developed unilateral gynecomastia secondary to marked dietary soy consumption. While the majority of cases are idiopathic, soy products, particularly those consumed by our patient, can contain high levels of phytoestrogens, which have been documented in limited case studies to contribute to abnormal development of breast tissue in adolescent and adult males. To our knowledge, this is the first documented case of gynecomastia occurring in a prepubescent patient resulting from excessive intake of dietary soy. Importantly, we also report a complete resolution of gynecomastia upon exclusion of dietary products containing significant amounts of soy.

Conclusion

While soybeans and soy-derived products can be an important source of nutrition for some, those with abnormal sensitivity to phytoestrogens may benefit from limiting dietary soy consumption to avoid potential adverse effects, including gynecomastia.
Coexistence of dyschondrosteosis associated to SHOX deficiency, pseudohypoparathyroidism 1B, and chronic autoimmune thyroiditis: a case report
Authors: Marin Fernando , Jodar Esteban , Sánchez del Pozo Jaime
Published: December 2020

We present an unusual case of SHOX deficiency associated with Léri-Weill dyschondrosteosis (LWD), Hashimoto’s thyroiditis and pseudohypoparathyroidism 1B in a young woman. To our knowledge, this is the first ever report of these disorders coexisting. At the age of nine years, the proband was diagnosed of hypothyroidism due to Hashimoto’s thyroiditis, and developed biochemical abnormalities consistent with hyperphosphatemia, mild hypocalcemia and elevated parathyroid hormone without any clinical symptoms except short stature. Replacement therapy with levothyroxine, calcium and alphacalcidol was initiated. The diagnosis of pseudohypoparathyroidism 1B was confirmed at the age of 17.5 years with the demonstration of methylation alteration at the GNAS locus. At the age of 16 years, 3.5 years after her menarche, she presented clear features of LWD. A large deletion of the SHOX gene was confirmed. Family genetic tests were not doable since she was adopted. We discuss the diagnostic challenges of these coexisting rare endocrinopathies.
Effect of vitamin D3 supplementation during pregnancy on high risk factors — a randomized controlled trial
Authors: Xiaomang Jiang , Yanling Wei
Published: December 2020

Objectives

Vitamin D plays an important role in the release of the placenta and implantation, and low levels are a risk factor for pre-eclampsia. Studies have also shown that symptomatic treatment of vitamin D3 deficiency can effectively reduce the risk of pre-eclampsia. In this study, vitamin D3 supplementation was performed on the risk of pre-eclampsia to observe its effect.

Methods

From January 2016 to December 2018, 450 women with maternal treatment and delivery in our hospital underwent an open-label randomized study. The pregnant women were divided into low-dose, medium-dose, and high-dose groups. Compare the incidence of pre-eclampsia and the dose effect of vitamin D levels.

Results

In the maternal and perinatal periods of the 450 maternal women, the 25[OH] index of the three groups of pregnant women was significantly increased, while the high-dose increase index was more obvious. The relative risk reduction rate was significantly lower. Compared with the low-dose and middle-dose groups, the high-dose group had a significantly lower incidence of pre-eclampsia, while the IUGR index was lower, and other obstetric indicators were comparable.

Conclusion

Vitamin D supplementation can effectively reduce the incidence of pre-eclampsia, while reducing the IUGR index, which has important value and significance in its clinical application.
Comparative study of a new commercial recombinant line assay and two immunoassays for detection of SARS-CoV-2 IgG antibodies in PCR-confirmed outpatients
Authors: Wellinghausen Nele , Ivanova Ralitsa , Deininger Susanne , Götz Andrea
Published: December 2020

Objectives

Commercially available immunoassays have been developed for detection of antibodies against SARS-CoV-2. However, equivocal and discrepant results between different immunoassay can occur requiring further assessment by confirmatory tests.

Methods

We investigated the new commercial line assay recomLine SARS-CoV-2 IgG (Mikrogen, containing the antigens S1, receptor-binding domain of the spike protein, and nucleocapsid protein (NP) of SARS-CoV-2) within a collection of well characterized serum samples from COVID-19 outpatients (n=49) and SARS-CoV-2-PCR-positive asymptomatic contact persons (n=6) in comparison to two commercial immunoassays, the S1 antigen based Anti-SARS-CoV-2-ELISA IgG by Euroimmun and the NP based Elecsys® Anti-SARS-CoV-2 by Roche.

Results

The recomLine assay was positive in all samples which had an equivocal or positive result for SARS-CoV-2 antibodies in at least one of the two immunoassays. It showed high agreement with the overall results of the immunoassays (94.5% [Cohen’s kappa = 0.85] and 92.7% [Cohen’s kappa 0.81] to the ELISA by Euroimmun and the assay by Roche, respectively). In addition, high agreement of the reactivity to the specific antigens S1 and NP in the recomLine assays compared to the results of the S1 based ELISA and NP based Elecsys® assay, was found (90.9% [Cohen’s kappa 0.78] and 96.4% [Cohen’s kappa 0.91] for S1 and NP, respectively).

Conclusions

The new recomLine SARS-CoV-2 IgG assay may be used as an additional tool for investigation of equivocal or discrepant results of Anti-SARS-CoV-2 immunoassays and for antigen-specific detection of SARS-CoV-2 IgG antibodies.
A new kumaraswamy generalized family of distributions: Properties and applications
Authors: Hussain Muhammad Adnan , Tahir Muhammad Hussain , Cordeiro Gauss M.
Published: December 2020

The Kumaraswamy generalized family of distributions proposed by Cordeiro and de-Castro (2011), has received increased attention in modern distribution theory with 624 google citations, and more than 50 special models have been studied so far. We define another generator, and then propose a new Kumaraswamy generalized family of distributions by inducting this new generator. Some useful properties of the proposed family are obtained such as quantiles, linear representation of the density, moments and generating function. The method of maximum likelihood is used for estimating family parameters. The properties of a special model of the family, called new Kumaraswamy-Burr XII distribution, are reported. A simulation study is conducted to assess the performance of maximum likelihood estimates of the proposed model. Two real-life data sets are analyzed to illustrate the flexibility of proposed model.
A common fixed point theorem for non-self mappings in strictly convex menger PM-spaces
Authors: Nikolić Rale M. , Ristić Vladimir T. , Ćirović Nataša A.
Published: December 2020

In this paper we prove existence and uniqueness of a common fixed point for non-self coincidentally commuting mappings with nonlinear, generalized contractive condition defined on strictly convex Menger PM-spaces proved.
On the Possibility of and Justification for a Philosophical Interpretation of Kabbalah: The Scholem-Gordin Correspondence
Authors: Werdiger Ori
Published: December 2020

This article introduces and discusses a short correspondence that took place in November 1931 between Gershom Scholem and Jacob Gordin. Gordin was a Russian-Jewish philosopher of religion, an expert on Hermann Cohen, and a founding figure of the postwar Paris School of Jewish Thought. The initial motivation for the correspondence was Scholem’s wish to produce a critical edition of the 17th century kabbalistic work, Shaar Hashamayim by Abraham Cohen Herrera, for which he asked for Gordin’s help. A close reading of Gordin’s response to Scholem and Scholem’s belated response to Gordin highlight the respective views of these thinkers regarding the relationship between kabbalah and Western philosophy in the modern era, and in German idealism in particular. The article is followed by a translation of the correspondence.
Combining Zn0.76Co0.24S with S-doped graphene as high-performance anode materials for lithium- and sodium-ion batteries
Authors: Lin Yemao , Huang Jintao , Shi Ludi , Cong Guangtao , Zhu Caizhen , Xu Jian
Published: December 2020

An easy and facile hydrothermal method is presented to synthesize hybrid materials of hollow mesoporous Zn0.76Co0.24S nanospheres anchored on reduced graphene oxide (rGO) sheets (Zn0.76Co0.24S@N/S-rGO), in which the obtained Zn0.76Co0.24S nanospheres are composed of numerous nanoparticles. Being evaluated as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs), the Zn0.76Co0.24S@N/S-rGO composites exhibited a high reversible capacity of 804 and 605 mA h g−1 at the current density of 1 A g−1 after 500 cycles for LIBs and SIBs, respectively. The excellent electrochemical performance of Zn0.76Co0.24S@N/S-rGO composites originates from the synergistic effect between hollow Zn0.76Co0.24S nanospheres and reduction graphene, as well as the void spaces between the neighbouring nanoparticles of Zn0.76Co0.24S providing large contact areas with electrolyte and buffer zone to accommodate the volume variation during the cycling process.
Internetbezogene Störungen: Wo kann Prävention ansetzen?
Authors: Müller Kai W. , Schneider Kristin , Wölfling Klaus
Published: December 2020

Internetbezogene Störungen umfassen unterschiedliche Onlineaktivitäten, die exzessiv entgleiten, das Leben Betroffener dominieren und zu nachhaltigen negativen Folgen führen können. Da internetbezogene Störungen einen chronischen Verlauf nehmen und eine erhöhte psychopathologische Symptombelastung bedingen können, sind wirksame Interventionsprogramme und evaluierte Präventionsangebote dringend notwendig.
Die Opioid-Krise in den USA
Authors: Lohmann Katrin , Röbbelen Alice , Krumm Stephan
Published: December 2020

Die freigiebige Verschreibung und einfache Verfügbarkeit opioidhaltiger Arzneimittel bewirkten in den USA vielfach einen missbräuchlichen Konsum und Opioidabhängigkeiten. Dies wiederum führte zu strikteren Verordnungen, wodurch illegale Rauschgifte an Bedeutung gewannen – einhergehend mit einer Erhöhung der Anzahl der Drogentoten. In Deutschland zeichnet sich bisher keine ähnliche Entwicklung ab, allerdings ist ein enges Monitoring der Entwicklung notwendig, um frühzeitig reagieren zu können.