bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of T3 Administration on Ex Vivo Rat Hearts Subjected to Normothermic Perfusion: Therapeutic Implications in Donor Heart Preservation and Repair
Authors: Mourouzis Iordanis , Kounatidis Dimitris , Brozou Vassiliki , Anagnostopoulos Dimitris , Katsaouni Athanasia , Lourbopoulos Athanasios , Pantos Constantinos 
Published: February 2023

The present study investigated the effects of triiodothyronine (T3) administration in ex vivo model of rat heart normothermic perfusion. T3 is cardioprotective and has the potential to repair the injured myocardium. Isolated hearts were subjected to normothermic perfusion (NP) with Krebs-Henseleit for 4 h with vehicle (NP) or 60 nM T3 in the perfusate (NP + T3). Left ventricular end diastolic pressure (LVEDP), left ventricular developed pressure (LVDP), perfusion pressure (PP) and percentage of change of these parameters from the baseline values were measured. Activation of stress induced kinase signaling was assessed in tissue samples. Baseline parameters were similar between groups. LVEDP was increased from the baseline by 13% (70) for NP + T3 vs. 139% (160) for NP group, p = 0.048. LVDP was reduced by 18.2% (5) for NP + T3 vs. 25.3% (19) for NP group, p = 0.01. PP was increased by 41% (19) for NP + T3 vs.91% (56) for NP group, p = 0.024. T3 increased activation of pro-survival Akt by 1.85 fold (p = 0.047) and AMPK by 2.25 fold (p = 0.01) and reduced activation of pro-apoptotic p38 MAPK by 3fold (p = 0.04) and p54 JNK by 4.0 fold (p = 0.04). Administration of T3 in normothermic perfusion had favorable effects on cardiac function and perfusion pressure and switched death to pro-survival kinase signaling.
Atributos essenciais: fundamentalidade da avaliação para a qualidade da atenção primária à saúde
Authors: Da Silva Clarissa Bohrer , Dos Santos Edemilson Pichek , Gomes Lidiane dos Santos , Dos Santos Vilma Constancia Fioravante , Ferreira Gímerson Erick 
Published: February 2023

Objetivou-se analisar os atributos essenciais dos serviços de Atenção Primária à Saúde (APS) na perspectiva de usuários e estudantes de Enfermagem. A pesquisa foi desenvolvida em um município do Rio Grande do Sul, Brasil, no período de maio a novembro de 2017. Na fase quantitativa, realizou-se estudo transversal em aplicação do questionário PCATool-Brasil, versão adulto, com 272 usuários da APS, e posterior análise estatística descritiva. Na fase qualitativa, realizou-se análise documental, em apreciação a sete minutas oriundas de entrevistas grupais e registros de diários de campo de 28 avaliadores, os quais foram sumarizadas pelo Discurso do Sujeito Coletivo. Os resultados expõem situações preocupantes, em panorama aquém do ideal, com avaliações dos atributos abaixo da média considerada satisfatória, apontando para fragilidades na qualidade da APS, estas corroboradas pelo coletivo de avaliadores. As avaliações tecidas revelam um cenário da saúde comprometedor no que tange à qualidade das ações prestadas, e endossam a fundamentalidade da avaliação como componente estratégico da gestão em saúde, que favorece a mobilização para empreender em tempos de crise.
Study of the inhibitory effect of Lactobacillus strains and lysozyme on growth of Clostridium spp. responsible for cheese late blowing defect
Authors: Olivera Rodi Jorge , Gonz´ález Ramos Marcela Joan , Díaz Gadea Pedro , Reginensi Stella Maris 
Published: February 2023

Three strains of Lactobacillus were previously isolated from dairy products, Lactobacillus casei 26, Lactobacillus delbrueckii subsp. bulgaricus 76 and L. casei 95. Anti-costridial activities of these strains were evaluated against a collection of Clostridium isolates, belonging to species responsible for late blowing defect in cheese. The three strains of Lactobacillus inhibited the growth of all Clostridium isolates analyzed. The inhibitory effect of cell-free supernatant of each of these Lactobacillus strains combined with that of commercial strain L. casei BAL C, or with a solution of lysozyme, were compared by disc diffusion assay. Mixtures of cell-free Lactobacillus supernatants and lysozyme exhibited higher inhibitory activity than the supernatants and lysozyme solution separately (P < 0.05). Additionally, Lactobacillus strains were resistant to lysozyme concentrations usually used during cheese making process.
ZnO/graphene heterostructure for electrical interaction and application for CO2 gas sensing
Authors: Kim June Soo , Kwon Soon Yeol , Lee Jae Yong , Kim Seung Deok , Kim Da Ye , Kim Hyunjun , Jang Noah , Wang Jiajie , Jung Dong Geon , Lee Junyeop , Han Maeum , Kong Seong Ho 
Published: February 2023

Abstract
Recently, the concentration of CO2, one of the major air pollutants for greenhouse effect, is increasing due to the massive use of fossil fuels. Thus, research about gas sensors for monitoring CO2 gas has performed, and conventional methods have the challenge of requiring complex structures. Thus, research about gas sensors using nanomaterials has been conducted, and graphene-based gas sensors have been actively researched for its extraordinary conductivity. However, there are challenges that the gas absorption site is limited in chemically unstable sites. In this study, ZnO/graphene heterostructure to improve the gas absorption area with high conductivity through ZnO on graphene was presented. Each layer acted as a gas adsorption and a carrier conducting layer respectively, and the sensitivity by the thickness of ZnO and the effect of the annealing temperature were evaluated. This work exhibited a sensitivity of 78% at room temperature, and repeatability and selectivity were also studied.
Pembuatan Ignition System Pada Micro Turbojet Engine AERO–16
Authors: Alex Indirwan , Rabeta Bismil , Rosadi Imron 
Published: February 2023

Prinsip kerja mesin turbojet bergantung dari komponen utamanya. Komponen utama dari mesin turbojet yaitu kompresor, ruang bakar, turbin. Sebelumnya telah dilakukan pembuatan micro turbojet engine aero – 16 dimana masih ada kekurangan yang harus diperbaiki, salah satunya ignition system. Pada tugas akhir ini dilakukan pembuatan ignition system untuk menunjang proses pembakaran pada micro turbojet engine aero - 16. Ignition system tersebut mempunyai perbedaan dengan system turbojet lainnya secara umum. Ignition system berfungsi menciptakan percikan bunga api pada igniter plug sebagai pemicu terjadinya penyalaan alat yang sebelumnya dibuat, dimana secara fungsi dapat menyebabkan terjadinya ledakan pada combustion chamber. Ignition system merupakan bagian yang penting pada combustion chamber, karena tanpa ada system pengapian, pembakaran campuran udara dan fuel pada combustion chamber tidak akan pernah terjadi. Ignition system telah bekerja dan dapat diaplikasikan sebagai pelengkap sistem pada micro turbojet engine aero – 16 dengan parameter penyalaan di ruang bakar dapat dilakukan dengan minimum putaran potensio meter sebesar 12% dan Rpm minimum sebesar 847. Dimana set pada pressure gauge gas sebesar 1 dan mempunyai nilai laju aliran massa rata – rata sebesar 24 gram per menit selama tiga kali pengujian dengan set parameter yang sama.
Enhancing active reconfigurable intelligent surface
Authors: Khalil Muhammad 
Published: February 2023

<p> A Reconfigurable Intelligent Surface (RIS) panel comprises many independent Reflective Elements (REs). One possible way to implement an RIS is to use a binary passive load impedance connected to an antenna element to achieve the modulation of reflected radio waves. Each RE reflects incoming waves (incident signal) by using on/off modulation between two passive loads and adjusting its phase using a Phase Shifter (PS). However, this modulation process reduces the amplitude of the reflected output signal to less than unity. Therefore, recent RIS works have employed Reflection Amplifiers (RAs) to compensate for the losses incurred during the modulation process. However, these systems only improve the reflection coefficient for a single modulation state, resulting in suboptimal RE efficacy. Thus, this paper proposes a strategy for optimising RE by continuously activating the RA regardless of the switching load state. The performance of the proposed scheme is evaluated in two scenarios: (1) In the first scenario (Sc1), the RA only operates to compensate for high-impedance loads, and (2) in the second scenario (Sc2), the RA runs continuously regardless of the RE loads. To benchmark the performance of Sc1 and Sc2, various metrics are compared, including signal-to-noise ratio, insertion loss, noise figure, communication range, and power-added efficiency. Numerical examples are provided to demonstrate the effectiveness of the proposed scheme. It is found that the proposed system in Sc2 leads to better overall performance compared to Sc1 due to the increased gain of the RIS reflection.</p>
Wideband 3-D-Printed Metal-only Reflectarray for Controlling Orthogonal Linear Polarizations
Authors: Palomares-Caballero Ángel , Molero Jiménez Carlos , Padilla Pablo , García-Vigueras María , Gillard Raphaël 
Published: February 2023

<p>This paper presents a metal-only reflectarray that enables the control of incident orthogonal polarizations in a large bandwidth. The proposed reflectarray is based on a unit cell whose tuning elements allow the independent control of the reflection phase value for the vertical and horizontal impinging polarizations. Due to the symmetry of the unit cell, the same performance is produced by each polarization when its reflection phase response is modified. The proposed unit cell provides a fairly linear phase response along the frequency with a phase variation in the orthogonal polarization of ±1°. The performance under oblique incidence and the frequency limitation of the unit cell are also investigated. From this unit cell, a metal-only reflectarray that produces circular polarization from a linear polarization is designed. The reflectarray presents a simulated directivity greater than 27 dBi with an axial ratio below 1.5 dB from 32 GHz to 50 GHz (43.9% of bandwidth). A prototype is fabricated and the measured results agree well with the simulated ones. The obtained aperture efficiency is between 56% and 41% in the considered frequency band. The measured realized gain ranges from 27 dBi to 30.3 dBi where the achieved radiation efficiency is greater than 97% </p>
Patch-wise 3D Segmentation Quality Assessment Combining Reconstruction and Regression Networks
Authors: Zaman Fahim Ahmed , Roy Tarun Kanti , Sonka Milan , Wu Xiaodong 
Published: February 2023

<p>In this article, we propose a novel deep learning framework to identify location-specific inaccurate segmentation for medical images to aid downstream analyses. The proposed method relies directly on the extracted segmentation related features and does not need to use the independent standard during the inference phase to identify erroneous regions in the computed segmentation. This is significant because image segmentation plays an indispensable role for automated quantitative analysis in modern precision medicine and the absence of case-by-case ground truth for medical images limits the segmentation quality assessment. Moreover, in contrast to our approach, to the best of our knowledge, current deep learning-based segmentation quality assessment models evaluate the segmentation quality globally and may ignore significant local segmentation errors in locations where diseases are prevalent. For the purpose of disease diagnosis and/or prognosis, it is critical to identify inaccurate segmentation in local regions. We used two publicly available datasets to evaluate our method and show that our method is robust and works well to localize small but significant inaccurate segmentation in the cases of both good and bad overall segmentation results for different imaging modalities. </p>
ThermoSurf: Thermal display technology for dynamic and multi-finger interactions
Authors: Peters Luka , Serhat Gokhan , Vardar Yasemin 
Published: February 2023

<p>Thermal feedback has been proven to enhance user experience in human-machine interactions. Yet state-of the-art thermal technology has focused on the single finger or palm in static contact, overlooking dynamic and multi-finger interactions. The underlying challenges include incompatible designs of conventional interfaces for providing salient thermal stimuli for such interactions and, thereby, a lack of knowledge on human thermal perception for relevant conditions. Here we present the ThermoSurf, a new thermal display technology that can deliver temperature patterns on a large interface suitable for dynamic and multi-finger interactions. We also investigate how user exploration affects the perception of the generated temperature distributions. Twenty-three human participants interacted with the device following three exploration conditions: static-single finger, dynamic-single finger, and static-multi finger. In these experiments, the individuals evaluated 15 temperature differences ranging from -7.5 °C to +1.5 °C with an initial temperature of 38 °C. Our results showed that human sensitivity against thermal stimuli is significantly greater for static-single finger contact compared to the other tested conditions. In addition, this interaction type resulted in higher thermal discrimination thresholds than the ones reported in the literature. Our findings offer new perspectives on providing salient and consistent thermal feedback for future tactile interfaces. </p>
On modules over the mod 2 Steenrod algebra and hit problems
Authors: Võ Phúc Đặng 
Published: February 2023

<p>Let us consider the prime field of two elements, $\mathbb F_2\equiv \mathbb Z_2.$ It is well-known that the classical "hit problem" for a module over the mod 2 Steenrod algebra $\mathscr A$ is an interesting and important open problem of Algebraic Topology, which asks a minimal set of generators for the polynomial algebra $\mathcal P_m:=\mathbb F_2[x_1, x_2, \ldots, x_m]$ on $m$ variables $x_1, \ldots, x_m,$ each of degree one, regarded as a connected unstable $\mathscr A$-module. The algebra $\mathcal P_m$ is the cohomology with $\mathbb F_2$-coefficients of the product of $m$ copies of the Eilenberg-MacLan complex $K(\mathbb F_2, 1).$ Although the hit problem has been thoroughly studied for more than 3 decades, solving it remains a mystery for any $m\geq 5.$ In this article, we develop our previous work [Commun. Korean Math. Soc. 35 (2020), 371-399] on the hit problem for $\mathscr A$-module $\mathcal P_5$ in generic degree $n:=n_s = 5(2^{s}-1) + 18.2^{s}$ with $s$ an arbitrary non-negative integer. As a direct result, a local version of Kameko's conjecture, which concerns the dimension of the cohit space $\mathbb F_2\otimes_{\mathscr A}\mathcal P_m$ associated with weight vectors, has been shown to be true for $m = 5$ and degree $n_s.$ Also, we show that this conjecture also holds for any $m\geq 1$ and degrees $\leq 12.$ Two applications of interest associated with this study are: establishing the dimension result for the cohit space $\mathbb F_2\otimes_{\mathscr A}\mathcal P_m$ for $m = 6$ in generic degree $5(2^{s+4}-1) + n_1.2^{s+4}$ with $s > 0,$ and describing the modular representations of the general linear group of rank $5$ over $\mathbb F_2.$ From this we are able to prove that the algebraic transfer, defined by W. Singer [Math. Z. 202 (1989), 493-523], is an isomorphism in bidegrees $(5, 5+n_s)$ with $s\geq 0.$ Besides, a new result on the behavior of this algebra transfer for all homological degrees $m$ is also obtained. Specifically, we have demonstrated that Singer's transfer is a trivial isomorphism in bidegree $(m, m+12)$ for arbitrary $m > 0.$ </p>
Power Efficient Designs of CNTFET-Based Ternary SRAM
Authors: Gadgil Sharvani , Sandesh Goli Naga , Kumar V chetan 
Published: February 2023

<p>This paper presents three new power-efficient designs of ternarySRAM using carbon-nanotube-field-effect transistors (CNTFETs). Two of the proposed ternary SRAM designs are cycle-operator based and the third design is buffer-based. </p>
Gamification as a tool for learning and assessment of soft skills at school
Authors: Altomari Natalia , Valenti Antonella 
Published: February 2023

Learning and assessing new skills is a challenge in education that teachers must take up primarily, playing a key role in the educational success of each student. With this perspective, soft skills (or transversal skills) are often considered of secondary importance, instead, if developed properly, they are among the skills required in the world of work, as well as in the purely educational world. Such skills, activated and enhanced through an innovative tool such as gamification, could be an answer to this gap. Serious games, in fact, are not only a means of entertainment or playfulness but are increasingly finding their place in the educational field.

La gamification come strumento di apprendimento e di valutazione delle competenze trasversali a scuola.
L’apprendimento e la valutazione di nuove abilità rappresentano una sfida nel settore educativo che deve essere colta principalmente dai docenti, giocando, questi, un ruolo fondamentale nel successo formativo di ciascuno studente. In quest’ottica, le soft skills (o abilità trasversali) vengono spesso considerate di secondaria importanza, invece, se sviluppate adeguatamente, rientrano tra le competenze richieste nel mondo del lavoro, oltre che in quello prettamente scolastico. Tali abilità, attivate e potenziate attraverso uno strumento innovativo quale la gamification, potrebbero rappresentare una risposta a questa lacuna. I serious game, infatti, non sono solo un mezzo di intrattenimento o ludico ma trovano sempre più spazio in ambito educativo.
CONSECUENCIAS DEL APRENDIAZAJE A DISTANCIA EN EDUCACIÓN EN EDUCACIÓN BÁSICA:
Authors: Cortez Soto Angélica Janeth , Heredia Escorza Yolanda 
Published: February 2023

El Covid-19 ocasionó el cierre de las escuelas; profesores, alumnos y padres de familia tuvieron que adaptarse a este proceso. En el regreso a las clases presenciales ocurrido en el 2021, se observaron afectaciones psicológicas y en el rendimiento educativo de los alumnos. Es necesario cuantificar el nivel de estrés excesivo en los docentes (burnout) y saber su opinión sobre las afectaciones en los alumnos derivados de los dos años de educación a distancia. Utilizando una metodología mixta, mediante el Inventario de Burnout Copenhague, se obtuvo un burnout promedio moderado en la dimensión personal, mientras que en las dimensiones laborales y en lo relacionado con el alumno, el burnout promedio fue bajo. Los docentes han experimentado estrés con el cambio de modalidad de clases, del modelo a distancia hacia la presencialidad, esto debido a las condiciones laborales y a las deficiencias educativas que el confinamiento causó. Además, existe un indicio de rezago escolar en los alumnos pertenecientes a la educación básica.
ANALISIS SISTEM PELAYANAN PUBLIK DI KANTOR KECAMATAN PADANGSIDIMPUAN BATUNADUA
Authors: Juniasih Tri Eva , Marpaung Indra Syahputra 
Published: February 2023

Pelayanan publik dapat dinilai berdasarkan kualitas sistem pelayanan tersebut dan tingkat kepuasan masyarakat terhadap pelayanan yang diperoleh. Adapun tujuan dari penelitian ini adalah untuk mengetahui kualitas system pelayanan publik yang dilakukan oleh kantor kecamatan Padangsidimpuan Batunadua, faktor penghambat dan faktor pendukung, tingkat kepuasan masyarakat terhadap pelayanan, serta solusi dalam peningkatan pelayanan. Metode yang digunakan dalam penelitian ini adalah analisis deskriptif kualitatif. Hasil penelitian diperoleh bahwa sistem pelayanan pegawai yang dialami masyarakat termasuk dalam kategori Cukup dimana masyarakat memberikan tanggapan positif terhadap sistem pelayanan dengan persentase 73,8% dan pegawai 87,2% kategori Baik. Terdapat faktor pendukung dalam pelayanan publik di kantor kecamatan padangsidimpuan batunadua yaitu motivasi, sadar dengan tanggungjawab, dan adanya kesempatan untuk naik jabatan dan reward. Melalui observasi, wawancara, dan angket yang dibagikan diperoleh kesimpulan bahwa masyarakat merasa puas dengan peyananan yang diterima. Solusi untuk peningkatan kualitas sistem pelayanan publik di kantor kecamatan Padangsidimpuan Batunadua yaitu upaya pemberian pelatihan kepada pegawai, membuat prosedur pelayanan yang sesuai standar, melakukan kegiatan pengembangan budaya agar pegawai sadar dengan nilai-nilai kelembagaan, serta membuka ruang dan waktu kepada masyarakat untuk mampu menggali potensi kewirausahaan melalui program kerja kantor kecamatan.
The theoretical aspects of adaptive management of the implementation of the ecological innovations in economy
Authors: Stepanenko Anatolii V. , Omelchenko Alla A. 
Published: February 2023

The purpose of the article is the development of the adaptive management of the implementation of the ecological innovations in economy on the basis of the strategy of adaptation and creation of the combination of the most profitable directions of the actions with taking into consideration situations of instability and uncertainty in the conditions of market relations.
The essence of the adaptive management was enlightened by implementation of the ecological innovations, the lack of development of the methodological and methodical aspects of the problem and the lack of the wide usage of the methods of adaptive planning, due to the complex entities that create the informational systems.
It was proved that the appearance of the adaptive management is connected with the need of taking into consideration the instability and inconsistency during the development of the economic relations. The content of the adaptive model of the management system is revealed and it is considered that the creation and implementation of the ecological innovations will help to overcome the contradictions between economic growth and guaranteeing of the ecological safety. The bases of the adaptive mechanism for the development and implementation of environmental innovations that provide coherent interaction between the instruments and the methods of state regulation and stimulation of environmentally-oriented innovative activity are formed.
Adaptive management is considered as the process of purposeful change of the parameters, structure and properties of an economic object in response to the changes taking place both in the external environment of the object's activity and within it, as well as the maintenance of the internal stability in the constantly changing environment. Among the priority areas of the formation of the complex adaptive mechanism for the provision of the ecological innovations, management of the creation and commercialization of the innovations, we should include: the improving of the system of the ecological norms, formation of the adaptive organizational and economic mechanism for stimulation of the innovation and environmental protection spheres; revision of the existing environmental protection system, as well as the system of environmental responsibility for the subjects of economic activity.