bluuebunny/crossref_metadata_2025 huggingface dataset:
Pyramids, Mountains, and Sight Lines
Authors: Zou Yifan , Brittenham Claudia
Published: April 2023

Teotihuacan’s distinctive urban grid has long attracted scholarly investigation. This essay examines several aspects of how the monumental core and its relationship to surrounding mountains changed over time. Specifically, it discusses how two of the most notable geomantic alignments at Teotihuacan—that of the Moon Pyramid with Cerro Gordo and that of the Sun Pyramid with Cerro Patlachique—were gradually refined over the centuries. Marvin Trachtenberg’s model for premodern design processes, called Building-in-Time, with its emphasis on continual redesign, concatenation, and retrosynthesis, serves as analytical framework. First, the essay argues that the location of the front stair of the Moon Pyramid remained fixed in successive reconstructions of the building because it frames a particular visual relationship between the Sun Pyramid and Cerro Patlachique behind it. Second, it presents a north-south alignment between the summits of the Moon and Sun Pyramids that developed as the Moon Pyramid was enlarged. Finally, it considers how the structures of the Moon Plaza helped eclipse the view of Cerro Gordo during the final phases of the Moon Pyramid’s history. These sight lines shaped the viewers’ embodied experience in ways that reinforced social hierarchies, reminding us that monumental architecture in Teotihuacan’s center not only unified its subjects but also reified distinctions among them.
Feminist Histories
Authors: Rjeille Isabella
Published: April 2023

This Dialogues takes the 2017–18 exhibition Radical Women: Latin American Art, 1960–1985 as a starting point to discuss Latin American art today, addressing its history, legacy, and contribution to positive social change through the prism of feminism. Seeking to challenge hegemonic readings of the categories of “Latin America” and “feminism” while reinstating the contribution of Latin American women, Latina/Latinx, and Chicana/Chicanx artists to art and critical thought today, the exhibition Radical Women proposed novel ways of displaying art from the region by embracing multiplicity, attending to the particularity of different contexts, and bringing to the fore common threads of critical and creative practice. Building on that premise, these contributions expand on the original exhibition’s time frame and consider the persistence of feminism and its changing status in Latin American art after 1985. They explore recent artistic practices, curatorial projects, and art historical scholarship; reflect on strategies of display, audience engagement, societal concerns, and epistemological premises; and consider different ways of conceptualizing Latin American and feminist identities, legacies, and genealogies today. By doing so, this Dialogues seeks to enrich and diversify our understanding of past and current practices, as well as highlight the intricate connections and resonances that exist between the two. Contributions by curators (Fajardo-Hill, Rjeille), scholars (Fernández, Lamoni), and artists (Antivilo, Motta) span issues in political activism, ecology, technology, education, genealogy, colonization, heritage, and memory. What emerges is a sense of the field’s present concerns and the ways this is shaping the future direction of feminism in Latin American art and art history.
Investigation of the Usability of Biodiesel from Horse Oil in Diesel Engines
Authors: Aydın Fatih , Oğuz Hidayet , Öğüt Hüseyin
Published: April 2023

Biodiesel is an alternative diesel fuel produced from animal and vegetable oils. As an alternative and ecologically acceptable substitute for conventional fuel, biodiesel is produced from a wide variety of edible vegetable oils that are usually used for human consumption and whose prices are expected to rise in the future. In this context, reliable and low-cost raw materials are gaining increasing interest for biodiesel production, such as by-products of meat processing industries or waste animal fats. Biodiesel production from waste animal fat, and raw food does not compete with the industry and has a great potential for waste caused by the global decline. In our study, a potential alternative fuel was produced for diesel engines by using the non-food-grade fat portion of horse meat consumed in Middle Asia countries. Solid crude horse oil was liquefied, and its fatty acid components were analyzed and transformed into horse oil biodiesel by the transesterification method. It was determined whether the fuel properties of crude horse oil, horse oil biodiesel, and euro diesel fuel comply with the standard values, and their usability in diesel engines was investigated. As a result of the tests, it has been concluded that horse oil biodiesel does not meet the standards in terms of cold flow properties and can only be used at a rate of low volumetric ratios in diesel engines. This article will contribute to the use of horse oil biodiesel production stages and fuel properties in diesel engines and future studies.
Massive Pelvic Hematoma After Atrial Septal Defect Closure Via Femoral Vein Cannulation
Authors: Wang Shangshang
Published: April 2023

We report a rare case of pelvic hematoma caused by iatrogenic external iliac artery hemorrhage following transfemoral venipuncture for atrial septal defect closure. By means of urgent femoral arteriography, bleeding in the branches of the external iliac artery was confirmed and occlusion of the bleeding branches was performed, thus avoiding the need for surgical laparotomy. The patient recovered well, and the hematoma significantly was reduced 2 months after surgery.
Catalytic hydrogenolysis lignin to obtain phenols: A review of selective cleavage of ether bonds
Authors: Du Xiongjian , Wu Shubin , Li Penghui
Published: April 2023

Lignin depolymerized phenolic compounds and biofuel precursors are ideal value-added products for lignin residues generated in biorefineries and modern paper pulp facilities. Hydrogenolysis of lignin is an efficient depolymerization method for the production of carbon-neutral sustainable fuels and platform chemicals. Lignin is underutilized due to its complex structure, mainly because of its complex interunit linkage crosslinks such as α-O-4, β-O-4, 4-O-5, and β-5. This paper centers on the hydrolysis reaction of three major ether bonds (α-O-4, β-O-4, 4-O-5) in lignin and lignin model compounds based on different catalysts for hydrogenative degradation and catalytic systems. The methods and strategies to inhibit the condensation reactions are summarized. In particular, density functional theory calculation of the reaction pathways are combined with isotopically labeled reaction pathways to deeply analyze the hydrogenation degradation mechanism of biomass and further improve the yield of monophenols during the hydrogenation degradation of lignin. Finally, a brief summary of the challenges and prospects of lignin hydrogenation degradation is proposed.
Self-assembly fundamentals in the reconstruction of lignocellulosic materials: A review
Authors: Hubbe Martin A. , Trovagunta Ramakrishna , Zambrano Franklin , Tiller Phoenix , Jardim Juliana
Published: April 2023

This review article considers processes by which the main components of wood have been reported to arrange themselves into various kinds of organized structures, at least to a partial extent. The biosynthesis of wood provides the clearest examples of such self-organization. For example, even before a cellulose macromolecule has been completely synthesized in a plant organism, the leading parts of the polymer chains already will have assembled themselves into organized crystals, i.e., nano-fibrils. This review then considers a challenge that faces industrial engineers: how to emulate the great success of natural systems when attempting to achieve favorable materials properties, process efficiency, and environmental friendliness when developing new engineered wood structures, barrier films, and other desired products composed of lignocellulosic materials. Based on the reviewed literature, it appears that the main chemical components of wood, even after they have been isolated from each other, still have a remnant of their initial tendencies to come back together in a somewhat non-random fashion, following mechanisms that can be favorable for the production of engineered materials having potentially useful functions.
Global dynamics of a dengue fever model incorporating transmission seasonality
Authors: Zhu Min , Feng Tingting , Xu Yong , Cao Jinde
Published: April 2023

The changes of seasons cause that the transmission of dengue fever is characterized by periodicity. We develop a dengue fever transmission model incorporating seasonal periodicity and spatial heterogeneity. Based on the well-posedness of solution for this model, we propose its basic reproduction number R0, and we discuss the properties of this number including its limiting form when the diffusion coefficients change. Moreover, the dynamical behavior of this model infers that if R0 ⩽ 1, then the disease-free periodic solution is globally asymptotically stable, and if R0 > 1, then the model possesses a positive periodic solution, which is globally asymptotically stable. These theoretical findings are further illustrated by the final numerical simulations. Additionally, we add that the similar problem has been investigated by M. Zhu and Y. Xu [A time-periodic dengue fever model in a heterogeneous environment, Math. Comput. Simul., 155:115–129, 2019] in which some dynamical results have been studied only on the cases R0 < 1 and R0 > 1. Our results not only include the scenario on the case R0 = 1, but also involve the more succinct conditions on the cases R0 < 1 and R0 > 1.
An analysis of approximate controllability for Hilfer fractional delay differential equations of Sobolev type without uniqueness
Authors: Johnson Murugesan , Kavitha Krishnan , Chalishajar Dimplekumar , Malik Muslim , Vijayakumar Velusamy , Shukla Anurag
Published: April 2023

This study focused on the approximate controllability results for the Hilfer fractional delay evolution equations of the Sobolev type without uniqueness. Initially, the Lipschitz condition is derived from the hypothesis, which is represented by a measure of noncompactness, in particular, nonlinearity. We also examined the continuity of the solution map of the Sobolev type of Hilfer fractional delay evolution equation and the topological structure of the solution set. Furthermore, we prove the approximate controllability of the fractional evolution equation of the Sobolev type with delay. Finally, we provided an example to illustrate the theoretical results.
Journalism: As Seen in the Eyes of Current Journalism and Digital Media Students
Authors: Aladdine Rana
Published: April 2023

The world of journalism is complex, multifaceted, and intricate. No consensus exists on the definition of journalism or its characteristics, skill set, and career choices. Differing perceptions stem from journalism’s shifts to new forms, practices, and ways of thought. The digital revolution has drastically transformed the understanding and definition of journalism. Journalists, journalism educators, and even social critics have all offered varying notions on the field. However, the students, a key element, are often neglected in this equation. This paper explores how students view journalism. The current generation is arguably highly equipped with digital media through regular practice, consumption, and exposure to digitization. Journalists-to-be are considered to be the future shareholders and may be the directors of the profession. The study focused on how journalism and digital media students specifically classified journalism characteristics, the educational background they found necessary for journalists, as well as their work aspirations. As journalism is evolving and, in particular, digital journalism is a key factor in the study, the student sample was limited to those registered in the Journalism and Digital Media department at Al Maaref University. Al Maaref University has been categorized as one of the first universities in Lebanon to include the term “digital media” in their journalism degree in hopes of reflecting the fast-changing industry. This study used a quantitative approach based on a survey questionnaire administered online to all students enrolled in the above-mentioned department. Findings showed that the majority of students considered the top characteristics of a journalist to include traditional journalism skills before any digital journalism skills. Students also expressed areas of study at times consistent with those skills and other times consistent with their career choices. Moreover, a majority of current journalism students aspire to work in front of the camera.
Determination of Elements Reliability for Power Plants Based on Internal Combustion Engines by Lowest Residual Entropy Method
Authors:   National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, Zaichenko Stefan V. , Pochka Kostiantyn I. ,   Kyiv National University of Construction and Architecture, Romasevych Yurii O. ,   National University of Life and Environmental Sciences of Ukraine, Shalenko Vadym O. ,   Kyiv National University of Construction and Architecture, Kulish Roman D. ,   National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, Balaka Maksym M. ,   Kyiv National University of Construction and Architecture
Published: April 2023

The selection technique of diagnostic parameters for the creation of fault detection system of autonomous electric power sources based on gasoline and diesel engines is given in the paper. An analysis of the design features for autonomous electric power sources based on internal combustion engines, which are the most common on the Ukrainian market, was carried out. Thanks to this, a logical model of the research object, which establishes the relation between the main structural elements of the system and determines the possible states of the system, was developed. The effect of fault state initiation for each element on the other system elements was analyzed. An informative criterion – Shannon information entropy is proposed to determine the finite number of diagnostic parameters among the infinite number of possible combinations for physical parameters that characterize the system. The equal-probable cases of exit from operational state of each system elements are considered. The residual entropies of the system at the fault state for one of the autonomous power sources assembly are determined, having applied the concept of Shannon information entropy. The residual entropy value is the informative criterion. The application of this criterion allowed to determine the system elements that most effectively reduce the system uncertainty degree. Based on the residual entropy values, the system assemblies, the state of which should be primarily monitored by diagnostic system, are selected. The diagnostic parameters are determined for such elements, and the ways to obtain them are given
STUDY OF APPROACHES TO THE DEVELOPMENT OF A SCANNING DEVICE BASED ON A BRUSHLESS MAGNETOELECTRIC MOTOR OF RETURN-ROTARY MOTION
Authors:   Institute of Electrodynamics National Academy of Sciences of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Akinin K.P. , Kireyev V.G. ,   Institute of Electrodynamics National Academy of Sciences of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Filomenko A.A. ,   Institute of Electrodynamics National Academy of Sciences of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Lavrinenko V.A. ,   Institute of Electrodynamics National Academy of Sciences of Ukraine,  Peremohy Ave., 56, Kyiv, 03057, Ukraine, Vertelieva O.V. ,   Kyiv National Trade and Economics University,  Kyoto street, 19, Kyiv, 02156, Ukraine
Published: April 2023

The paper presents the results of studies of approaches to the development of a scanning device based on a specialized brushless magnetoelectric motor of return-rotary motion. The structures are described and a comparison is made of servo systems with motors both with an elastic magnetic coupling between the stator and the rotor, and without such coupling. The dependences of the accuracy of a given sawtooth signal processing and the stator current effective value on the parameters of the servo systems, the values of the coefficients of elasticity and viscosity of the motor, as well as the relative value of the duration of the linear interval of the reference sawtooth signal are determined. It is shown that the reduction of the stator current effective value is achieved by introducing an elastic magnetic coupling between the stator and the rotor, as well as limiting the second derivative when forming the process of resetting the reference sawtooth signal. References 8, figures 9, tables 3.
Respiratory Outcomes for Ventilator-Dependent Children With Bronchopulmonary Dysplasia
Authors: Manimtim Winston M. , Agarwal Amit , Alexiou Stamatia , Levin Jonathan C. , Aoyama Brianna , Austin Eric D. , Bansal Manvi , Bauer Sarah E. , Cristea A. Ioana , Fierro Julie L. , Garey Donna M. , Hayden Lystra P. , Kaslow Jacob A. , Miller Audrey N. , Moore Paul E. , Nelin Leif D. , Popova Antonia P. , Rice Jessica L. , Tracy Michael C. , Baker Christopher D. , Dawson Sara K. , Eldredge Laurie C. , Lai Khanh , Rhein Lawrence M. , Siddaiah Roopa , Villafranco Natalie , McGrath-Morrow Sharon A. , Collaco Joseph M.
Published: April 2023

OBJECTIVES

To describe outpatient respiratory outcomes and center-level variability among children with severe bronchopulmonary dysplasia (BPD) who require tracheostomy and long-term mechanical ventilation.

METHODS

Retrospective cohort of subjects with severe BPD, born between 2016 and 2021, who received tracheostomy and were discharged on home ventilator support from 12 tertiary care centers participating in the BPD Collaborative Outpatient Registry. Timing of key respiratory events including time to tracheostomy placement, initial hospital discharge, first outpatient clinic visit, liberation from the ventilator, and decannulation were assessed using Kaplan-Meier analysis. Differences between centers for the timing of events were assessed via log-rank tests.

RESULTS

There were 155 patients who met inclusion criteria. Median age at the time of the study was 32 months. The median age of tracheostomy placement was 5 months (48 weeks’ postmenstrual age). The median ages of hospital discharge and first respiratory clinic visit were 10 months and 11 months of age, respectively. During the study period, 64% of the subjects were liberated from the ventilator at a median age of 27 months and 32% were decannulated at a median age of 49 months. The median ages for all key events differed significantly by center (P ≤ .001 for all events).

CONCLUSIONS

There is wide variability in the outpatient respiratory outcomes of ventilator-dependent infants and children with severe BPD. Further studies are needed to identify the factors that contribute to variability in practice among the different BPD outpatient centers, which may include inpatient practices.
Prawna dopuszczalność stosowania instrumentarium zarządzania jakością przez jednostki samorządu terytorialnego
Authors:   Katolicki Uniwersytet Lubelski Jana Pawła II, Kisała Magdalena
Published: April 2023

The subject of the considerations is the use of quality management instruments by local government units. The analysis of their activities shows that in their practice they implement quality-oriented measures in different areas. This fact is confirmed by public information available on the BIP website, describing, for example, the implementation of a given system or the use of a specific methodology or quality management tool. The legal bases for the use of quality management tools by local and regional authorities need to be examined in order to determine the content of the legal provision giving them the power to implement quality-related measures. Consequently, the article reaffirms the thesis on the legal admissibility of using the instruments of quality management by local government units, indicates its scope and formulates the concept of quality management instruments in the context of the functioning of local government.
The Accusation of Disinformation as a Pretext to Limit the Freedom of Speech at the Time of the Covid-19 Pandemic
Authors:   Uniwersytet Technologiczno-Humanistyczny im. Kazimierza Pułaskiego w Radomiu, Składanek Bartłomiej
Published: April 2023

The COVID-19 pandemic made the authorities of many countries take extraordinary steps to prevent the new disease from spreading. They were not limited to improving the operation of healthcare but also extended to a range of areas of social and political life. That resulted in restrictions to fundamental human and civil rights and freedoms. A number of doubts voiced in the public debate in this connection encourage a scientific consideration of the legal aspects of restricting the rights and freedoms in connection with the pandemic. This paper is aimed at presenting disinformation as a hazard to the right to the freedom of speech, constitutionally protected in democratic states.
Structure and tensile fracture mechanism of aluminum matrix composites produced by internal oxidation
Authors: Mylnikov V. V. , Chernyshov E. A. , Romanov A. D. , Mylnikova M. V. , Zakharychev E. A. , Ryabov N. A.
Published: April 2023

This article presents experimental results of resistance against fracture upon static tension of cast aluminum matrix composites based on aluminum with various content of Al2O3 strengthening phase. The cast aluminum matrix composite materials were produced by the technology based on burnout of aluminum melt upon interaction with oxygen. Two batches of ingots with various content of solid phase were smelted for tests of static strength. The average particle size of strengthening phase of predominantly prismatic morphology was 60–80 μm, and their content varied from 15 to 25 %. The fracture surfaces obtained upon static uniaxial tension of the considered samples were studied on the samples destroyed at maximum stress. The fracture surfaces were analyzed using an optical microscope with expanded options due to improved long-focus system and digital processing of images based on unique procedure of 3D structure analysis. For indepth analysis of characteristic fracture region a scanning electron microscope was used equipped with energy and wavelength dispersive elemental analyzers. It was established in the studies that in the samples with lower content of dispersed phase, the fracture is characterized by mixed heterogeneous in terms of macrogeometry pattern. This can be interpreted as dry fibrous fracture with visible crystalline pimples and breakaways. With an increase in the solid phase, a mixed, sufficiently homogenous in terms of macrogeometry, fracture pattern of fanlike fibrous structure can be observed. Crystalline pimples were also detected of a different fracture surface area, as well as breakaways of other geometrical sizes. The features of changes in the relief of fracture surface and the fracture mechanisms of the obtained composites have been detected and described.
Karakteristik pepton dari limbah jeroan ikan sidat (Anguilla bicolor) sebagai nutrien untuk pertumbuhan bakteri
Authors: Nurhayati Tati , Wirayudha Raden Hilman , Suptijah Pipih
Published: April 2023

Limbah jeroan ikan sidat (Anguilla bicolor) dari hasil samping produksi umumnya tidak dimanfaatkan dengan baik. Pemanfaatan limbah jeroan ikan sidat perlu dilakukan karena proteinnya cukup tinggi, sehingga memiliki potensi untuk dimanfaatkan menjadi salah satu produk yang memiliki nilai ekonomis tinggi yaitu pepton ikan. Penelitian ini bertujuan untuk menentukan kondisi hidrolisis optimum hidrolisat jeroan ikan sidat menggunakan enzim papain, menentukan karakteristik kimia pepton jeroan ikan sidat serta mengaplikasikan pepton jeroan ikan sidat sebagai medium pertumbuhan bakteri untuk dibandingkan dengan pepton komersial. Pepton dibuat dengan proses hidrolisis menggunakan enzim papain dengan waktu 5 jam dan suhu 60oC. Konsentrasi optimum didapat pada penggunaan enzim papain 1.000 U/mg/g. Pepton jeroan ikan sidat mengandung protein 82,1 % dan lemak 0,93%. Pepton jeroan ikan sidat memiliki kelarutan 99,9%; total nitrogen 13,12%; kadar garam 0,15%; dan pH 6. Pepton jeroan ikan sidat dapat digunakan sebagai nutrien pada media pertumbuhan bakteri Escherichia coli dengan nilai optical density (OD) yang lebih tinggi jika dibandingkan dengan pepton komersial bactopeptone, namun lebih rendah nilai pertumbuhannya jika digunakan pada media pertumbuhan untuk bakteri Staphylococcus aureus.
Peningkatan volume pemurnian minyak ikan tuna (Thunnus sp.) dari hasil samping pengalengan
Authors: Aprillia Adenia Cahyatie , Suseno Sugeng Heri , Ibrahim Bustami
Published: April 2023

Industri pengalengan ikan menghasilkan produk samping berupa minyak ikan yang mengandung bahan non minyak dengan mutu rendah di bawah standar IFOS (International Fish Oil Standard), sehingga perlu dilakukan pemurnian dengan netralisasi dan bleaching menggunakan sentrifugasi untuk mendapatkan minyak ikan yang sesuai dengan kebutuhan pangan. Hasil penelitian terdahulu umumnya terbatas pada skala yang kecil, kuantitas, dan kualitas minyak tuna yang dihasilkan bervariasi, sehingga penerapannya di lapangan pada Usaha Kecil Menengah (UKM) tidak dapat langsung diadopsi. Tujuan penelitian adalah untuk memperoleh proses pemurnian minyak ikan tuna yang sesuai dengan standar IFOS. Penelitian ini menggunakan metode eksperimen rancangan acak lengkap (RAL) dengan taraf perlakuan volume pemurnian (5; 7,5; 10)L menggunakan sentrifugasi dengan kecepatan 10.000 rpm selama 10 menit. Analisis pengujian yang dilakukan meliputi kadar asam lemak bebas (FFA), nilai peroksida (PV), nilai p-anisidin (p-Anv), total oksidasi (totoks), nilai kejernihan, nilai rendemen, kandungan logam berat, dan profil asam lemak. Total asam lemak jenuh (SFA) pada minyak ikan tuna kasar sebesar 22,46%. Asam lemak tak jenuh tunggal (MUFA) yaitu 25,38%, sedangkan asam lemak tak jenuh majemuk (PUFA) yaitu 25,01%. PUFA didominasi oleh DHA yaitu 15,57%, sementara kandungan asam lemak EPA yaitu 3,15%. Perlakuan terbaik didapatkan pada perlakuan volume pemurnian 10 L dengan parameter oksidasi yakni asam lemak bebas (FFA) 0,36±0,05%, bilangan peroksida (PV) 6,87±0,09 mEq/kg, bilangan p-anisidin (p-AnV) 6,28±0,1 mEq/kg; nilai total oksidasi (totoks) 20±0,29 mEq/kg, parameter fisika yakni kejernihan 91,88±0,04%, dengan nilai rendemen yakni 87±1,70%.
Evaluasi tingkat keasinan relatif dan profil sensori garam rumput laut menggunakan metode magnitude estimation dan rate-all-that-apply (RATA)
Authors: Seulalae Anggrei Viona , Prangdimurti Endang , Adawiyah Dede Robiatul , Nurjanah Nurjanah
Published: April 2023

Garam rumput laut berpotensi sebagai alternatif garam rendah natrium yang dapat dikonsumsi penderita hipertensi. Parameter sensori terutama tingkat keasinan dan profil sensori berbasis konsumen menjadi salah satu kriteria penting untuk pengembangan garam rumput laut ke depan. Penelitian ini bertujuan untuk menentukan tingkat keasinan relatif dan profil sensori garam rumput laut melalui metode berbasis konsumen. Penelitian ini terdiri atas preparasi rumput laut, pembuatan garam rumput laut Sargassum polycystum dan Ulva lactuca, dan evaluasi tingkat keasinan relatif dengan metode magnitude estimation (ME) dan profil sensori dengan metode rate-all-that-apply (RATA). Data dianalisis menggunakan independent sample t-test dengan taraf kepercayaan 95%. Hasil penelitian menunjukkan garam S. polycystum dan U. lactuca memiliki karakteristik kadar NaCl 43,77±0,30% dan 18,98±0,29%. Tingkat keasinan relatif larutan garam rumput laut lebih rendah dibandingkan larutan garam NaCl 0,54% sehingga diperlukan konsentrasi yang lebih tinggi untuk dapat memberikan stimulus yang sama dengan garam NaCl 0,54%. Garam S. polycystum dapat dirasakan rasa asin yang setara dengan sampel reference garam NaCl 0,54% pada konsentrasi 0,85% dan garam U. lactuca pada konsentrasi 0,89%. Garam rumput laut memiliki atribut sensori dominan, yaitu salty, umami, bitter, dan eggy/sulfur. Garam S. polycystum memiliki profil sensori yang lebih netral dan lebih disukai.
Penambahan ekstrak lamun (Enhalus acoroides) dan gonad bulu babi (Diadema setosum) sebagai formulasi sediaan moisturizer body lotion
Authors: Badriyah Lailatul , Asih Eka Nurrahema Ning , Ni’amah Siti Nihayatun , Ningrum Reza Hidayah , Mardiyanti Yuniar , Wulansari Destin Retno
Published: April 2023

Kulit merupakan bagian tubuh yang sensitif terhadap perubahan suhu akibat aktivitas di dalam dan di luar ruangan. Salah satu produk kosmetik yang dapat mengatasi kulit kering dan bersisik akibat perubahan suhu adalah moisturizer body lotion berbahan lamun dan gonad bulu babi. Tujuan dari penelitian ini adalah menentukan formulasi yang optimal pada sediaan moisturizer body lotion berdasarkan karakteristik stabilitas fisik, hubungan indeks iritasi dengan hasil uji kesukaan panelis, serta kandungan fitokimia pada sediaan moisturizer body lotion dari ekstrak lamun (Enhalus acoroides) dan gonad bulu babi (Diadema setosum). Penelitian ini terdiri dari pembuatan ekstrak, pembuatan produk tanpa penambahan ekstrak lamun dan gonad bulu babi (kontrol) serta dengan penambahan (2:1, 1:2, dan 3:3), uji stabilitas, uji iritasi, dan uji fitokimia. Hasil penelitian menunjukkan bahwa terdapat perbedaan warna pada empat formulasi body lotion yaitu putih (kontrol), seledri (2:1), sage (1:2) dan zaitun (3:3) dengan bau khas blossom. Kisaran pH pada sediaan yaitu 6,31-8,05 dan rentang daya sebar sebesar 3,2-6,7 cm. Hasil uji indeks iritasi dari 32 panelis terdeteksi sebanyak 3% terindikasi gejala iritasi edema parah (bengkak) dan indeks rasa panas terdeteksi sebanyak 1%. Nilai uji kesukaan panelis tertinggi untuk indikator warna, aroma dan tekstur terdapat pada sediaan tanpa penambahan ekstrak lamun dan gonad bulu babi (kontrol). Sediaan moisturizer body lotion mengandung senyawa alkaloid dan tanin. Fomulasi terbaik yaitu perbandingan ekstrak lamun dan gonad bulu babi 2:1 yang ditandai dengan tingginya uji hedonik (warna), tidak adanya indeks iritasi edema, dan rasa panas.
Pengaruh konsentrasi dan waktu perendaman NaOH terhadap karakteristik gelatin kulit ikan patin
Authors: Putri Erin Apriliani Wulandari , Hermanianto Joko , Hunaefi Dase , Nurilmala Mala
Published: April 2023

Gelatin banyak digunakan dalam bidang pangan dan non pangan, sehingga kebutuhannya terus meningkat. Kebutuhan gelatin di Indonesia masih bergantung pada impor dari negara lain. Gelatin komersial umumnya berasal dari babi dan sapi yang menjadi kekhawatiran bagi beberapa agama terkait kehalalan dan terdapat larangan untuk mengonsumsi babi atau sapi. Oleh karena itu, diperlukan sumber bahan baku alternatif untuk mengatasi hal tersebut yaitu dengan memanfaatkan sumber dari hasil perikanan, salah satunya kulit ikan patin. Gelatin dibuat dengan beberapa proses tahapan antara lain praperlakuan, ekstraksi, dan pengeringan. Proses praperlakuan dapat dilakukan dengan cara basa, asam, atau kombinasi basa dan asam. Kombinasi basa dan asam dapat meningkatkan sifat gelatin yang dihasilkan. Konsentrasi dan lama waktu perendaman yang digunakan menjadi faktor yang dapat memengaruhi gelatin yang dihasilkan. Oleh karena itu, penelitian ini bertujuan menganalisis pengaruh konsentrasi dan waktu perendaman NaOH terhadap sifat fisikokimia gelatin. Rancangan dalam penelitian ini menggunakan Rancangan Acak Lengkap Faktorial dengan 2 faktor. Perlakuan yang digunakan yaitu konsentrasi NaOH (0,1 M: 0,2 M: dan 0,3 M) dan waktu perendaman NaOH (1 jam dan 3 jam). Analisis data dilakukan menggunakan ANOVA satu arah dengan uji lanjut Duncan pada selang kepercayaan 95% (p<0,05). Hasil penelitian menunjukkan konsentrasi NaOH dan waktu perendaman NaOH yang berbeda memberikan pengaruh nyata terhadap parameter rendemen, pH, kekuatan gel, dan viskositas, sedangkan interaksi antara perlakuan konsentrasi NaOH dan waktu perendaman NaOH yang berbeda tidak berpengaruh terhadap kadar air dan kadar abu. Hasil gelatin kulit ikan patin pada semua perlakuan memiliki karakterikstik (kadar air, kadar abu, pH, kekuatan gel, dan viskositas) yang telah sesuai dengan standar gelatin menurut SNI 8622-2018 dan GMIA 2019.
Fault Damage Zone Effects on Ground Motions during the 2019 Mw 7.1 Ridgecrest, California, Earthquake
Authors: Yeh Te-Yang , Olsen Kim B.
Published: April 2023

We have simulated 0–3 Hz deterministic wave propagation in the Southern California Earthquake Center Community Velocity Model (CVM) version CVM-S4.26-M01 for the 2019 Mw 7.1 Ridgecrest earthquake. A data-constrained high-resolution fault zone model (Zhou et al., 2022) is incorporated into the CVM to investigate the effects of the near-fault low-velocity zone (LVZ) on the resulting ground motions, constrained by strong-motion data recorded at 161 stations. The finite-fault source used for the simulation of the Ridgecrest event was obtained from the Liu et al. (2019) kinematic inversion, enriched by noise following a von Karman correlation function above ∼1 Hz with a f−2 high-frequency decay. Our results show that the heterogeneous near-fault LVZ inherent to the fault zone structure significantly perturbs the predicted wave field in the near-source region, in particular by more accurately generating Love waves at its boundaries. The fault zone decreases the 0.1–0.5 Hz mean absolute Fourier amplitude spectrum bias to seismic recordings for all sites in the model and in the Los Angeles basin area (∼200 km from the source) by 16% and 26%, respectively. The fault zone structure generally improves modeling of the long-period features in the data and lengthens the coda-wave trains, in better agreement with observations. The favorable fit to data was obtained with a model including high-resolution surface topography, a 700-m-thick geotechnical layer and frequency-dependent anelastic attenuation in the model domain, with QS=0.1VS and QS(f)=0.1VSf0.5 (VS in m/s) for frequencies lower and higher than 1 Hz, respectively. We recommend that a data-constrained fault zone velocity structure, where available, be included in ground-motion modeling to obtain the least-biased fit to observed seismic data.
Geomechanical Modeling of Ground Surface Deformation Associated with Thrust and Reverse-Fault Earthquakes: A Distinct Element Approach
Authors: Chiama Kristen , Chauvin Benjamin , Plesch Andreas , Moss Robb , Shaw John H.
Published: April 2023

We seek to improve our understanding of the physical processes that control the style, distribution, and intensity of ground surface ruptures on thrust and reverse faults during large earthquakes. Our study combines insights from coseismic ground surface ruptures in historic earthquakes and patterns of deformation in analog sandbox fault experiments to inform the development of a suite of geomechanical models based on the distinct element method (DEM). We explore how model parameters related to fault geometry and sediment properties control ground deformation characteristics such as scarp height, width, dip, and patterns of secondary folding and fracturing. DEM is well suited to this investigation because it can effectively model the geologic processes of faulting at depth in cohesive rocks, as well as the granular mechanics of soil and sediment deformation in the shallow subsurface. Our results show that localized fault scarps are most prominent in cases with strong sediment on steeply dipping faults, whereas broader deformation is prominent in weaker sediment on shallowly dipping faults. Based on insights from 45 experiments, the key parameters that influence scarp morphology include the amount of accumulated slip on a fault, the fault dip, and the sediment strength. We propose a fault scarp classification system that describes the general patterns of surface deformation observed in natural settings and reproduced in our models, including monoclinal, pressure ridge, and simple scarps. Each fault scarp type is often modified by hanging-wall collapse. These results can help to guide both deterministic and probabilistic assessment in fault displacement hazard analysis.
Electrodiagnosis of Multiple Cranial Neuropathies and Lumbosacral Polyradiculopathy in Tuberculous Meningitis: A Case Report
Authors: Hong Sunmok , Jeon Jihui , Chang Won Kee
Published: April 2023

Cranial neuropathy and radiculopathy are common complications of tuberculous meningitis. However, the co-occurrence of these complications and the corresponding electrodiagnostic findings have rarely been reported. We report a patient diagnosed with tuberculous meningitis who presented with difficulty in smelling, facial paralysis, hearing loss, and severe weakness in the bilateral lower extremities. A neurological examination confirmed impaired function of the olfactory nerves. Electrodiagnostic studies, including a nerve conduction study, electromyography, and brainstem auditory evoked potential, revealed multiple cranial neuropathies involving the left facial nerve and bilateral vestibulocochlear nerves, as well as bilateral lumbosacral polyradiculopathies. In patients with tuberculous meningitis, multiple cranial neuropathies and polyradiculopathies can occur simultaneously as complications, and electrodiagnostic studies can enable an accurate diagnosis of these complications and an assessment of their severity.
Novel Pathogenic Variant in PIEZO2 in a Korean Patient with Distal Arthrogryposis
Authors: Kim Taewon , Lee Seung-Ah , Choi Won Ah , Kang Seong-Woong , Choi Young-Chul , Park Hyung Jun
Published: April 2023

Alterations in PIEZO2 can result in distal arthrogryposis, which is characterized by non-progressive contracture in two or more areas of the body prior to birth. Here, we present a 29-year-old man born with multiple joint contractures and cleft palate. He showed short stature, low-set ears, macrotia, hearing impairment, micrognathia, a triangular face, blepharophimosis, deep-set eyes, high arched eyebrows, decreased facial expressions, retrognathia, arachnodactyly, absent phalangeal crease, shortening of the first and fifth toes, short stature, pectus excavatum, epicanthus, bilateral ptosis, and ophthalmoplegia. He also complained of dyspnea and severe kyphoscoliosis. Pulmonary function tests showed a severe restrictive pattern. An electrodiagnostic study did not reveal any neurogenic or myogenic features. Next-generation sequencing revealed a novel de novo heterozygous pathogenic variant in PIEZO2 (c.7251G>T; p.Trp2417Cys). Our study is the first report of a pathogenic variant in PIEZO2 in a Korean patient with distal arthrogryposis.
Vasculogenic Myoclonus of Peripheral Origin after Whiplash Injury: A Case Report
Authors: Choi Woo In , Kim Hyoung Seop
Published: April 2023

Based on the neuroanatomical origin of the electrical discharge, myoclonus could be classified in terms of its etiology as cortical, subcortical, spinal, or peripheral. A 29-year-old female patient experienced a continuous involuntary rhythmic twitching movement of the right elbow for 6 months. This myoclonus occurred immediately after a whiplash injury caused by a rear-end car accident. The patient had no radiological, clinical, or electrophysiological evidence for central nervous system origin. Concentric needle electromyography recordings of the right biceps, brachioradialis, and triceps muscles presented bursts of spontaneous rhythmic activity synchronous to the clinical myoclonus. Doppler ultrasound on the right arm revealed that the biceps and triceps contraction coincided with the vascular pulsation of the brachial artery and vein. This result suggested that myoclonus was caused by vascular stimulation, similar to the pathophysiology of hemifacial spasms. A whiplash injury around the neck or arm may have affected the vascular structures in the upper and middle trunks, resulting in vasculogenic myoclonus. Electromyography can be used to determine the classification and distribution of myoclonic jerks.
Mujeres en la economía gig: resultados de una encuesta sobre condiciones socioeconómicas y financieras a trabajadoras que operan con plataformas de la economía gig
Authors: Fernández Díez María Carmen , Támola Alejandro , Joachín Arturo , Azar Karina , Coloma María Gabriela , Herrera Diego
Published: April 2023

Las plataformas de la economía gig tienen el potencial de contribuir a mejorar la inclusión financiera de las mujeres. En esta publicación se presentan los resultados de una encuesta sobre las condiciones socioeconómicas y financieras realizada a cerca de 1,000 trabajadoras de la economía doméstica de cuatro plataformas en Argentina, Chile, Colombia y México. Se presenta el marco muestral, ficha técnica y principales resultados en perfil socioeconómico, relación con la plataforma, ingresos, inclusión financiera, y perspectivas de ahorro y crédito.
A produção de texto como prática centrada no aluno: sujeito da aprendizagem
Authors: Andrade Benedita Vieira de
Published: April 2023

Neste trabalho, apresenta-se uma abordagem da escrita numa visão interacionista, que concebe a linguagem como uma forma de interação entre os interlocutores nas situações comunicativas de que participam. Nessa perspectiva, a escrita é concebida como prática discursiva que se materializa em situações sociais de interação. Assim, são contemplados alguns princípios que fazem da escrita uma atividade interlocutiva, como o que dizer, a quem dizer, por que dizer e como dizer. Esses princípios orientam uma prática de escrita centrada no aluno como sujeito da aprendizagem, instaurador da atividade de interlocução. São apresentados também alguns fatores que podem auxiliar  na manutenção da linha argumentativa do texto, progressão temática, articulação e coerência de seus argumentos.
Aplicação de uma topologia de conversor monofásico-trifásico de baixo custo como filtro ativo paralelo em sistemas monofásicos
Authors: Dias José Artur Alves , Santos Junior Euzeli Cipriano dos , Rocha Nady
Published: April 2023

O objetivo deste artigo é apresentar uma nova abordagem de filtro paralelo para uma topologia de conversor monofásico trifásico de baixo custo. Tal topologia foi proposta a princípio para acionamento de motores trifásicos. O conversor é controlado para corrigir o fator de potência da carga e reduzir os harmônicos, melhorando assim a qualidade de energia no sistema monofásico. Entre os benefícios pode-se destacar aumento indireto da capacidade do sistema, liberando a capacidade dos condutores e transformadores; menores níveis de harmônicos de tensão no PCC (ponto de conexão comum), diminuindo os harmônicos de tensão para os consumidores. Apresentação, análise, simulação e resultados experimentais são mostrados no presente artigo.
Diagnóstico da manutenção preventiva das instalações prediais de água fria do CEFET-PB, unidade João Pessoa
Authors: Leal Claudiana Maria da Silva , Batista Ana Paula Da Silva , Fusari Dayelly Gonçalves , Padilha Wilton Wilney Nascimento
Published: April 2023

A manutenção preventiva das instalações hidráulicas prediais de água fria contribui para o uso correto dos recursos naturais, especificamente da água, como também favorece a continuidade de funcionamento. Este artigo apresenta o diagnóstico das condições de manutenção preventiva nas Instalações Prediais de Água Fria do CEFET-PB, Unidade João Pessoa. O estudo seguiu o método de abordagem indutiva, estatístico-descritivo, e utilizou a técnica da documentação direta do tipo pesquisa de campo. Elaborou-se um “Check-List”, utilizado para identificar “in loco” todos os pontos de água das áreas molhadas, identificando os defeitos mais freqüentes. Verificaram-se as formas de intervenção na manutenção preventiva pela instituição. Os resultados das entrevistas evidenciaram que no tocante ao gerenciamento da manutenção, houve 80% para o atendimento às emergências; o pavimento térreo apresenta mais defeitos (66,67%) e como área molhada, os banheiros (66,67%); a limpeza das caixas de águas é realizada semestralmente (60%); inexistem profissionais qualificados para atuar no que concerne à execução da manutenção. Ao “Check-List” constataram-se 552 pontos de água, sendo 30,80% com defeito e 69,20% sem defeito. Concluiu-se que a manutenção preventiva é inexistente na Instituição, sendo necessário de início aplicar a manutenção corretiva de urgência, para então planejar a implantação da manutenção preventiva dessas instalações.
O design de interiores como objeto de consumo na sociedade pós-moderna
Authors: Maior Mônica Maria Souto , Storni Maria Otília Telles
Published: April 2023

Este artigo visa fazer uma análise da produção e uso do design de interiores como objeto de consumo na sociedade pós-moderna, mostrando esse processo como forma de produção simbólica, identificação e estratificação social. Chegamos à conclusão de que o consumo distintivo tanto pode ser de dentro para fora - no caso de tentar descobrir o que as pessoas querem expressar-comunicar com o seu estilo de vida e de decoração - como de fora para dentro, quando as indústrias de decoração querem propor formas de design que também são formas de ser e de se distinguir na sociedade.
Projeto e análise de antenas patch compactas com contornos fractais de Koch
Authors: Silva Paulo Henrique Da Fonseca , Oliveira Elder Eldervitch Carneiro de , Silva Sandro Gonçalves da
Published: April 2023

Este artigo apresenta uma proposta para a miniaturização de antenas em microfita, do tipo inset-fed patch retangular, através da aplicação de curvas fractais de Koch aos seus contornos retilíneos. Em comparação com as antenas em microfita convencionais, as antenas patch com contornos fractais apresentam frequências de ressonância inferiores, possibilitando a fabricação de estruturas ainda mais compactas. A técnica inset-fed é investigada pela primeira vez para o casamento de impedâncias das antenas fractais, que são alimentadas através de linhas de microfita com reentrâncias. Na fase de projeto, as dimensões das antenas foram otimizadas com o auxílio do software Ansoft DesignerTM, usado para a análise precisa do comportamento eletromagnético das antenas através do método dos momentos. A partir destas simulações, vários protótipos de antenas foram construídos através da aplicação de dois tipos de contornos fractais de Koch: triangular e retangular. Para a validação da metodologia empregada, um estudo comparativo dos resultados medidos e simulados foi realizado. As simulações indicaram que as antenas fractais propostas apresentam diagramas de radiação do tipo ‘broadside’, que são similares ao de um patch retangular. Em relação à área ocupada por uma antena patch retangular, verificou-se que: para uma mesma frequência de operação, a antena fractal de Koch triangular ocupa uma área até 28,6% menor, enquanto a antena fractal de Koch retangular ocupa uma área até 40,8% menor.