bluuebunny/crossref_metadata_2025 huggingface dataset:
Piren Otu Yağı, Tüylü Adaçayı Yağı, Aynisafa Yağı, Zerdeçal Yağı ve Argan Yağının in Vitro Antibakteriyal ve Antifungal Özelliklerinin Belirlenmesi
Authors: GÜRER GİRAY Burcu
Published: August 2023

Son yıllarda gelişen antimikrobiyal direnç endişesiyle alternatif stratejiler geliştirmek amacıyla bitkisel yağların antimikrobiyal aktiviteleri araştırılmaktadır. Bu çalışmanın amacı; ticari olarak temin edilebilen beş farklı bitkisel yağın altı farklı standart bakteri suşu ile bir standart maya mantarı suşu üzerindeki minimum inhibitör konsantrasyonlarının (MİK) belirlenmesidir. Gram pozitif bakterilerden; Staphylococcus aureus (ATCC 29213), Enterococcus faecalis (ATCC 29212); Gram negatif bakterilerden Escherichia coli (ATCC 225923), Klebsiella pneumoniae (ATCC 13883), Pseudomonas aeruginosa (ATCC 27853) ve Acinetobacter baumannii (ATCC 49139) ile maya mantarlarından Candida parapsilosis (ATCC 22019) üzerindeki antimikrobiyal aktiviteleri belirlemek için, ticari olarak temin edilen piren otu (Tanacetum santolinoides) yağı, tüylü adaçayı (Salvia lanigera) yağı, aynısafa (Calendula officinalis) yağı, zerdeçal (Curcuma longa) yağı ve argan (Argania spinosa) yağı olmak üzere beş bitkisel yağ kullanılmıştır. Bitkisel yağların etkili MİK değerleri resazurin mikrotitre testi (REMA) tekniği kullanılarak tespit edildi. Tüm bitkisel yağlar, farklı konsantrasyonlarda standart bakteri suşları ve standart maya mantarı suşu üzerinde etkili olmuştur. Bitkisel yağların her bir suş üzerindeki etkili konsantrasyon aralığı şu şekildedir; C. parapsilosis (ATCC 22019), K. pneumoniae (ATCC 1388), E. faecalis (ATCC 29212) ve E. coli (ATCC 25923) için 62,5-250 µg/ml, A. baumannii (ATCC 49139) ve P. aeruginosa (ATCC 27853) için 125-250 µg/ml, S. aureus (ATCC 29213) için 62,5-125 µg/ml olarak saptanmıştır. Yapılan bu çalışmada standart bakteri suşlarına ve standart maya mantarı suşuna karşı etkileri incelenen bitkisel yağların antimikrobiyal etkinliğinin farklı düzeylerde olduğu gözlenmiştir. Sonuç olarak araştırılan bu bitkisel yağların, sergiledikleri yüksek antimikrobiyal etkileriyle yeni antimikrobiyal ilaç ve antimikrobiyal madde çalışmalarına katkı sağlayabileceği düşünülmektedir.
Dezavantajlı Bölgelerde Görev Yapan Okul Öncesi Öğretmenlerinin Bilim Şenliklerine İlişkin Görüşleri: Bursa 4007 Bilim Şenliği Örneği
Authors: ÖZHAN Muhammed Muzaffer , YALÇINTAŞ Esra
Published: August 2023

Bu çalışmada okul öncesi eğitiminin önemine ve bilim şenliklerinin bu eğitim için ne kadar önemli olduğuna odaklanmaktadır. Okul öncesi dönemi, dil, doğa ve çevresel etkileşimlerle birleştirerek çocukların gelişimini desteklemek için önemli bir fırsattır. Ancak, öğretmenlerin ve okul ortamının desteği gerekmektedir. Bu nedenle bilim şenlikleri gibi zengin öğrenme alanları, çocukların günlük hayatlarında gördükleri olay ve cihazların basit bir mantıkta gerçekleştiğini anlamalarına yardımcı olabilmektedir. Bu çalışmanın amacı, Bursa Bilim ve Teknoloji Merkezinde gerçekleştirilen “Bursa Bilim Şenliği Faz-1 Anasınıflarımızla 7’den 77’ye Bilimle Şenleniyoruz” isimli bilim şenliğine katılan dezavantajlı bölgelerdeki anaokullarındaki öğretmenlerin bilim şenliğine yönelik görüşlerini belirlemektir. 120 öğretmene yapılan anket sonucunda, bilim şenliği mekânı ve atölyelerinin öğretmenlere kişisel ve mesleki faydalar sağladığı belirtilmiştir. Şenlikte yürütülen etkinliklerin çocukların sosyal etkileşimleri üzerinde olumlu etki sağladığı ve öğretmen ve öğrencilerin özgüven kazandıkları tespit edilmiştir. Bulgular doğrultusunda, bilim şenliğinin dezavantajlı bölgelerde bulunan okul öncesi çocukları için çeşitli faydalar sağladığı ve sürekliliğinin desteklenmesi önerilmektedir.
A RESEARCH ON PSYCHOTECHNICAL TESTS USED IN HUMAN RESOURCES PRACTICES
Authors: ELCI Meral , MURAT EMINOGLU Gülay , SAN Anıl
Published: August 2023

Psychotechnical tests are used in many areas such as the recruitment of employees, their placement in the appropriate job, and the evaluation of their performance in human resources practices. And with the use of these tests, it helps organizations to employ the right people for the job and to increase the performance of their employees and therefore organizations. One of the most used methods in psychotechnical evaluation is the Vienna Test System (VTS). Determination Test (DT) and Cognitrone Test (COG), two of the most used tests in VTS, were used as measurement tools in this study. While the COG test fundamentally measures attention, DT measures the speed and quality of response to stimuli. The aim of this study is to determine the success of the employees in the COG and DT, according to their educational status and age, and to determine whether there is a difference between them. For this purpose, tests were applied to 3222 blue-collar employees working in Kocaeli and Istanbul in Türkiye. According to the results obtained, as the education level of the employees increases, their success in these tests increases, and as their age increases, their success decreases. In line with these results, some suggestions were presented to managers and researchers.
DOES GENDER INFLUENCE THE RELATIONSHIP BETWEEN PERCEIVED ETHICAL LEADERSHIP AND EMPLOYEES AFFECTIVE COMMITMENT
Authors: DEMIR *Hasan Cem , ELCI Meral
Published: August 2023

The objective of this study is to address the research gap in the existing literature by examining the moderating influences of leaders' gender and employees' gender on the relationship between ethical leadership and employees' affective commitment to their organizations. The research sample consisted of 636 employees working in an industrially developed region in Turkey. Initially, factor analysis, correlation analysis, and reliability analysis were conducted for all variables. To test the hypotheses, the study investigated the various effects of gender-based variables through correlation and regression analyses. The correlation analysis revealed that the relationships between the gender of leaders and employees and all other variables were insignificant. In the regression analysis, when female leaders were selected from the sample, it was found that only the justice dimension significantly influenced affective commitment. In the remaining selections, both the morality and justice dimensions had a significant influence on affective commitment. In general, the moderation analyses indicated that neither leaders' nor employees' gender significantly moderated the relationship between the four dimensions of ethical leadership and affective commitment. Although the overall results did not yield significant implications, the findings related to women and the ethical leadership dimensions can shed light on future studies. This study contributes to the existing literature on employees' affective commitment, ethical leadership, and gender differences in organizations by examining the potential moderating variables that impact affective commitment. Additionally, the use of an unverified ethical leadership scale as an independent variable can be considered an original contribution to the methodology.
Nanobiosensing Based on Electro-Optically Modulated Technology
Authors: Li Shuang , Qin Ziyue , Fu Jie , Gao Qiya
Published: August 2023

At the nanoscale, metals exhibit special electrochemical and optical properties, which play an important role in nanobiosensing. In particular, the surface plasmon resonance based on precious metal nanoparticles, as a kind of tag free biosensor technology, has brought high sensitivity, high reliability and convenient operation to the sensor detection. By applying an electrochemical excitation signal on the nano plasma device, modulating its surface electron density and realizing electrochemical coupling surface plasmon resonance, it can effectively complete the joint transmission of electrical signals and optical signals, increase the resonance shift of the spectrum, and further improve the sensitivity of the designed biosensor. In addition, smartphone is playing an increasingly important role in portable mobile sensor detection systems. These systems typically connect sensing devices to smartphone to perceive different types of information, from optical signals to electrochemical signals, providing ideas for the portability and low-cost design of these sensing systems. Among them, electrochemiluminescence, as a special electrochemical coupled optical technology, has good application prospects in mobile sensing detection due to its strong anti-interference ability, which is not affected by background light. In this review, the surface plasmon resonance is introduced from nanoparticles, and its response process is analyzed theoretically. Then, the mechanism and sensing application of electrochemistry coupled surface plasmon resonance and electrochemiluminescence are emphatically introduced. Finally, it extends to the related research of electrochemical coupled optical sensing on mobile detection platforms.
The Mitochondrial Calcium Uniporter (MCU): Molecular Identity and Role in Human Diseases
Authors: D’Angelo Donato , Rizzuto Rosario
Published: August 2023

Calcium (Ca2+) ions act as second messenger, regulating several cell functions. Mitochondria are critical organelles for the regulation of intracellular Ca2+. Mitochondrial calcium (mtCa2+) uptake is ensured by the presence in the inner mitochondrial membrane (IMM) of the mitochondrial calcium uniporter (MCU) complex, a macromolecular structure composed of pore-forming and regulatory subunits. MtCa2+ uptake plays a crucial role in the regulation of oxidative metabolism and cell death. Many evidences demonstrate that dysregulation of mtCa2+ homeostasis can have serious pathological outcomes. In this review, we briefly discuss the molecular structure and the function of the MCU complex and then we focus our attention on human diseases in which a dysfunction in mtCa2+ has been showed.
Conducting Polymer Based Ink for Inkjet Printing: Formulation, Fabrication and Application
Authors: Arora Ekta Kundra , Sharma Vibha , Ravi Aravind , Shahi Akanksha , Jagtap Shweta , Adhikari Arindam , Dash Jatis Kumar , Kumar Pawan , Patel Rajkumar
Published: August 2023

The recent years various, there huge interest to improve the efficiency of smart electronic and optoelectronic devices via developing emerging materials and printing technologies. However, printing technologies becomes one of the most interesting areas for researcher over a convenient coating method because it not only helps to improve the efficiency of device but also help for rapid, reproducible, and low-cost production which open as a new window for mass production for commercial use. Inkjet printing technology has become the most attractive among various printing technologies due to which it is acceptable in most of scientific and various of industrial applications. This review paper presents an overview of the investigations on formulation of the ink, fabrication, and the applications of conductive polymer via inkjet printing for variety of devices including supercapacitors, sensors, electrochromic devices, and patterning of conductive polymers on flexible substrates. The review covers the different conducting polymer explored for supercapacitors, sensors, electrochromic devices, and patterning of conductive polymers, their ink formulation, inkjet printing process and their keys features. This review also presented future perspectives for inkjet printing technology for advanced electronic, optoelectronic, and other conductive polymer-based devices. We believe this review provides new direction to next generation conductive polymer-based devices for various applications.
Fault Location Analysis of Optical Fiber Communication Link in High Altitude Area
Authors: Xu KeHang , Yuan ChaoWei
Published: August 2023

Breakage and damage of fiber optic cable fibers seriously affect the normal operation of fiber optic networks and it is important to quickly and accurately determine the type and location of faults when they occur. The advantages of wavelet transform in singular signal detection and signal filtering are used to analyze Optical Time Domain Reflectometer (OTDR) curve signal and the fault detection method of fiber communication link with no relay and large span in high altitude area is given, which realizes the accurate detection and location of optical fiber communication link fault events under strong noise. The theoretical analysis is basically consistent with the experimental data. The accuracy of optical fiber fault location has been greatly improved in performance. The method has been directly applied to the field detection of ultra-long optical fiber links in high altitude areas, which has certain significance for the future real-time monitoring of optical fiber cables.
Biosynthesis of Glucaric Acid by Recombinant Strain of Escherichia coli Expressing Two Different Urinate Dehydrogenases
Authors: Yang Xinchao , Niu Linlin , Ye Chunjiang , Wang Yuanxiu , Liu Yuehui , Wang Fang , Naxin Sun
Published: August 2023

D-Glucaric acid is an important bio-based building block of polymers and is a high value-added chemical that can be used in a variety of applications. In the present study, the Udh target genes from Pseudomonas putida and Pseudomonas syringae were used together to construct the expression vector pETDuet-2×Udh. The transformants of BL21(DE3) with vector pETDuet-2×Udh was applied to produce glucaric acid from glucuronic acid. After optimization of induction conditions, the highest Udh expression were achieved when 0.4 mmol L-1 isopropyl-β-d–thiogalactoside (IPTG) was added to cell cultures at an OD600 value of 0.6 followed by culture at 26℃ for 6 hours. The production of glucaric acid substantially reached 5.24 ± 0.015 g L-1 in fed-batch cultures in a 30 L tank. In the present study, a new system for glucaric acid production was established, which was more economic and friendly to environment.
Eco-Engineering Technologies and Achievements of Landscape Water Reconstructed from Aquaculture Ponds in Shanghai
Authors: Zhang Guowei , Zhang Qian , Shang Kankan
Published: August 2023

Post-evaluation of ecological redevelopment is a good method for its achievements. The eco-engineering technologies and achievements of landscape water reconstructed from aquaculture ponds in Shanghai Chenshan Botanical Garden have been introduced in this study. The sediments and water quality were also sampled and tested for basic physicochemical parameters and heavy metal concentration. The ecological redevelopment of landscape water reconstructed from aquaculture ponds was evaluated using the Nemero comprehensive pollution index method. The results shown that nutrients including organic matter, organic nitrogen and their ratio of sediment were found to be in a state of moderate pollution, while their ecological risk of heavy metals was low. Although total nitrogen and total phosphorus of water quality was really higher than that of other indexes, the decline trends of ammonia nitrogen, total nitrogen and total phosphorus was obvious presented over time. In general, this is a good example that redevelopment of water ecosystems from aquaculture ponds using eco-engineering technologies.
Functionalized Chiral Twisted Optical Fibers: A Review
Authors: Zhang Yifan , Li Boyao , Huang Tianrong , Zhou Guiyao , Liang Yaoyao
Published: August 2023

With the development of the volume of information exchange and perception increases, the demands for intelligent, miniaturized and integrated optical devices for information acquisition are also increasing. As the core component of optical networks for transmitting information, how to further optimize its structural characteristics to generate richer optical characteristics and apply them to information exchange and optical field control has become a key research hotspot. The introduction of chiral twist characteristics has led to new phenomena and applications in optical field transmission and transformation for traditional optical fibers or microstructured optical fibers (MOF). Therefore, this review mainly starts from the principle of chiral optical fibers, introduces their preparation and latest application scenarios, and finally looks forward to their potential future development prospects.
The Implicit Numerical Method for the Radial Anomalous Subdiffusion Equation
Authors: Błasik Marek
Published: August 2023

This paper presents a numerical method for solving a two-dimensional subdiffusion equation with a Caputo fractional derivative. The problem considered assumes symmetry in both the equation’s solution domain and the boundary conditions, allowing for a reduction of the two-dimensional equation to a one-dimensional one. The proposed method is an extension of the fractional Crank-Nicolson method, based on the discretization of the equivalent integral-differential equation. To validate the method, the obtained results were compared with a solution obtained through Laplace transform. The analytical solution in the image of the Laplace transform was inverted using the Gaver-Wynn-Rho algorithm implemented in the specialized mathematical computing environment, Wolfram Mathematica. The results clearly show the mutual convergence of the solutions obtained by the two methods.
Fenomena eksklave dan implikasinya terhadap pelayanan kesehatan di Kecamatan Colomadu, Karanganyar
Authors: Zaski Granaya Talitha Nindya , Pamardhi-Utomo Rizon , Permana Chrisna Trie Hadi
Published: August 2023

Pola pembangunan dan faktor sejarah telah menyebabkan sebagian daerah terpisah dari wilayah induk administrasinya. Istilah ekslave muncul untuk menjelaskan fenomena di mana suatu wilayah terpisah dari daerah induk administrasinya, terhalang atau dikelilingi oleh wilayah administratif lainnya. Keadaan ini menyebabkan keterbatasan bagi penduduk daerah eksklave dalam mengakses pelayanan publik di daerah wilayah induk. Penelitian ini ditujukan untuk mengkaji implikasi eksklave dalam konteks pelayanan publik khususnya pelayanan kesehatan. Analisis terhadap implikasi eksklave dalam kerangka aksesibilitas dilihat dari tiga hal yakni lokasi dan radius pelayanan kesehatan, keterjangkauan transportasi, dan tingkat pelayanan kesehatan dengan kasus Kecamatan Colomadu, Kabupaten Karanganyar. Penelitian ini menggunakan pendekatan kuantitatif, dengan data yang diperoleh dari observasi lapangan, kuesioner terhadap 100 responden, serta tinjauan dokumen terkait dengan teknik analisis spasial dan deskriptif. Temuan memperlihatkan bahwa fenomena eksklave berimplikasi pada kecenderungan penyediaan pelayanan publik untuk penduduk daerah eksklave oleh daerah sekitar.
Peran sistem informasi geografis dalam pemetaan pandemi: studi kasus Kecamatan Banjarsari, Kota Surakarta
Authors: Rahayu Murtanti Jani , Rahayu Paramita , Putri Rufia Andisetyana , Rini Erma Fitria
Published: August 2023

Pandemi Covid-19 telah menjadi tantangan berat bagi Indonesia yang merupakan salah satu negara dengan jumlah kasus terkomfirmasi positif yang sangat tinggi. Pulau Jawa merupakan episentrum pandemi Covid-19 di Indonesia. Pemutakhiran data dan pemetaan data yang cepat sangat dibutuhkan untuk bisa memetakan kategorisasi zonasi Covid-19 pada skala administrasi yang paling kecil, yaitu kelurahan. Hal ini penting untuk memastikan strategi dan antisipasi yang tepat dapat diimplementasikan. Penelitian ini bertujuan untuk bagaimana sistem informasi geografis (SIG) dalam pemetaan data berperan dalam penanganan pandemi Covid-19. Penelitian ini menggunakan analisis regresi untuk mengkonfirmasi data-data yang penting untuk dipetakan secara spasial. Hasil analisis regresi menunjukkan bahwa kepadatan penduduk dalam suatu area permukiman, jumlah penduduk total, dan jumlah rumah tangga kurang mampu adalah variabel yang secara signifikan berpengaruh pada jumlah kasus terkonfirmasi Covid-19 pada empat belas kelurahan di Kecamatan Banjarsari. Dengan pemetaan variabel-variabel tersebut, dapat diidentifikasi kelurahan-kelurahan yang berisiko lebih tinggi dan memerlukan penanganan spesifik berdasarkan faktor kunci pada level kelurahan.
Perubahan pola mobilitas orang pada kawasan peri urban-urban pada masa pandemi: studi spasial pada wilayah Malang Raya
Authors: Aini Nurul , Cahyani Septi Dwi , Setyawan Pungky Eka
Published: August 2023

Kebijakan Pemberlakuan Pembatasan Kegiatan Masyarakat (PPKM) pada masa Pandemi Covid-19 berdampak terhadap kegiatan di berbagai sector yang mempengaruhi pergerakan masyarakat kawasan periurban ke kawasan urban untuk berbagai tujuan. Penelitian ini bertujuan menganalisis perubahan pola pergerakan masyarakat tersebut dengan menggunakan analisis deskriptif statistik. Data dikumpulkan melalui kuesioner dan dianalisis dengan matriks asal-tujuan untuk melihat perubahan pola dan karakteristik pergerakan sebelum dan saat pandemic berlangsung. Perubahan pola dan karakteristik perjalanan selanjutnya dianalisis dengan perspektif spasial berbasis GIS.  Hasil penelitian menunjukkan adanya perubahan pola pergerakan pada 38% masyarakat. Perubahan terbesar terjadi pada motif pergerakan bersekolah ke kawasan urban. Hasil dari penelitian diharapkan bisa berkontribusi sebagai salah satu dasar pertimbangan dalam merencanakan kebijakan, baik dalam aspek spasial, pembangunan fisik perkotaan serta perekonomian ketika menghadapi kembali sebuah pandemi.
Phase-modulated Rice model for statistical distributions of complex signals
Authors: Wilson D. , Ostashev Vladimir , Krackow Max
Published: August 2023

The basic Rice model is commonly used to describe complex signal statistics from randomly scattered waves. It correctly describes weak (Born) scattering, as well as fully saturated scattering, and smoothly interpolates between these extremes. However, the basic Rice model is unsuitable for situations involving scattering by random inhomogeneities spanning a broad range of spatial scales, as commonly occurs for sound scattering by turbulence in the atmospheric boundary layer and other scenarios. In such scenarios, the phase variations are often considerably stronger than those predicted by the basic Rice model. Therefore, the basic Rice model is extended to include a random modulation in the signal phase, which is attributable to the influence of the largest, most energetic inhomogeneities in the propagation medium. Various joint and marginal distributions for the complex signal statistics are derived to incorporate the phase-modulation effect. Approximations of the phase-modulated Rice model involving the Nakagami distribution for amplitude, and the wrapped normal and von Mises distributions for phase, are also developed and analyzed. The phase-modulated Rice model and various approximations are shown to greatly improve agreement with simulated data for sound propagation in the near-ground atmosphere.
The first record of Middle Jurassic serpulids from SE Turkey, equatorial Tethys
Authors: Vinn Olev , Hoşgör İzzet
Published: August 2023

The Jurassic platform margin succession in the Hezan area, called the "Hezan Unit" (Diyarbakır), on the north of the Arabian platform in southeastern Turkey includes five formations of carbonate-dominated rocks. The most interesting is the upper part of the Hezan unit (the Kuran Formation) that contains unique layers of oolitic and clayey limestone. A first record of the calcareous polychaete tubeworm Propomatoceros lumbricalis is described from the Middle Jurassic lower part of the Kuran Formation of the Hezan area. Most knowledge of fossil serpulids is centered on European material, and little has been done on Middle East fossil calcareous tubes. The taxonomic information recorded as a result of this study will add to our understanding of the biogeographic history of the Middle Jurassic calcareous polychaete associations and help to interpret the structure and paleoecology of its marine communities.
Assessment of Rabies Control Attitudes During the COVID-19 Pandemic through Partial Least Square-Structural Equation Modeling
Authors: Purnama Sang Gede , Utami Ni Wayan Arya , Subrata Made , Pradnyani Putu Erma , Agustina Karang , Swacita IBN
Published: August 2023

The COVID-19 pandemic disrupts rabies control activities in the community. A new approach is needed to control rabies during the COVID-19 pandemic through digital health interventions by conducting digital surveillance and education. This study aimed to determine key attitude indicators in controlling rabies during the COVID-19 pandemic. A cross-sectional study on 166 participants in Denpasar City with a total of 31 indicators measuring five variables: perceptions of the benefits of rabies control (6 indicators), perceptions of rabies risk (6 indicators), perceptions of obstacles to rabies control (5 indicators), perceptions of the need for technology (7 indicators), and attitudes toward rabies control (7 indicators) were analyzed using partial least square-structural equation modeling. The results revealed that 80.7% of participants owned a dog, and sources of rabies information were from social media (45%), the internet (33.7%), and rabies volunteers (33%). The model explained that perception of the benefits of rabies control and the need for technology had a direct effect on attitudes toward rabies control (p-value <0.001 and 0.015). In brief, perceived benefits and the need for technology influence attitudes toward rabies control during the COVID-19pandemic.
Reshaping Healthcare: A Bibliometric Analysis of Lessons Learned in Post-COVID-19 Health Policy
Authors: Azizan Azliyana , Abdullah Khairul Hafezad , Rahayu Sri Ratna , Rusli Nadia Safirah , Azizah Nurona , Tarmidzi Nornajehah
Published: August 2023

The COVID-19 pandemic has profoundly impacted health policy globally, leading to heightened concern and urgency. However, previous studies have been hampered by limited resources and insufficient discussions on the long-term implications for health policies following multiple COVID-19 waves. Thus, this study examined the evolution of international studies on post-COVID-19 health policy. A comprehensive analysis used well-known literature databases Scopus and Web of Science to explore parameters including publication growth, participating countries, areas of interest, and keyword analysis of topics such as"COVID-19" and "Health Policy." The United States emerged as an active participant, focusing on "Computer science." Key themes included "COVID-19 Pandemic," "Public health policy," and "Epidemiology," highlighting current trends. It emphasized the significance of global cooperation and knowledge exchange in addressing the complex challenges posed by the pandemic and shaping resilient health policies for the future. The contribution of this study lies in providing a comprehensive overview of post-COVID-19 health policy research and its implications for the health field.
Production Profiles Recorded Using Fiber-Optic Technology in Wells with Electrical Submersible Pump Lift System
Authors: Ramirez Palacio Gabriel Jaime , Almario Felipe , Castro Chacon Alexander , Meza Rojas Eliana , Hernandez Nini Johana , Valencia Maria
Published: August 2023

Fiber-optic distributed sensor technology has rapidly evolved over the past 30 years, becoming very useful in the hydrocarbon sector for different operations, such as pipeline leak monitoring, production and injection logging, fracture monitoring, vertical seismic profiling, and steam injection, among others. Monitoring temperature is a critical aspect of reservoir development and a well’s life cycle, given its broad range of applications. Temperature profiling is commonly used in production logging, often in conjunction with other sensors to quantify and identify fluids. This paper discusses two prevalent scenarios encountered in the Llanos Orientales region of Colombia, where 28 wells with electrical submersible pump (ESP) lifting systems were impacted. During the execution of these fiber-optic logs, two conditions of particular interest were explored: wells with low-flow rates below 500 barrels per day and wells with mechanical limitations that preclude monitoring with conventional sensors due to the presence of stainless-steel bands at the bottom of the well. The fiber-optic string provided access to the drilling zone, enabling temperature and pressure monitoring of the production intervals. To interpret the data, a probabilistic model based on enthalpy balance, mass, and conservation of momentum was used to determine the well’s production profile.
UV and IR divergence-free calculation of the vertex function at arbitrary values of its arguments
Authors: Mashford John
Published: August 2023

The mathematics of covariant spectral regularization for covariant matrix valued measures with one Lorentz index on open subsets of Minkowski space is described. This is then applied to the case of the vertex function and expressions for the densities associated with the vertex function in the t channel and the s channel with respect to Lebesgue measure on Minkowski space are obtained. These densities are well defined, non-divergent and analytic over their domains of definition and are obtained without using renormalization or needing to consider final state radiation. The limit of the expression for the vertex function in the t channel at low energy and low momenta is computed resulting in the classical result for the leading order (LO) contribution to the anomalous magnetic moment of the electron. Also the density for the vertex function in the s channel is used to compute the NLO vertex correction contribution to the high energy limit of the cross section for the process e+ e−→µ + µ−.
Self-filtering Low Noise Horn Antenna Using Bi-omega Particle
Authors: KVBL DEEPTHI , CH Sravani , M Sreelekha , K Sruthi
Published: August 2023

A unique self-filtering low-noise horn antenna is presented in this research. The purpose of this design is to lower the WR-62 horn antenna's operating bandwidth so that it can self-filter the noise it picks up while operating. A broadband radiator is a horn antenna. In the microwave frequency range of 30 to 40 GHz, known as the ka band, the proposed design is simulated. As a result, the high-frequency band experiences good return losses. The right supplementary components, such as biomega particles that are often employed as the filter, are normally required to limit the noise captured by the antenna, which typically affects the performances in the receiving mode. Comparing the basic WR-62 horn antenna's bandwidth with and without biomega particles. Additionally, comparisons are drawn between single and double slits. The effectiveness of the suggested design, which can be successfully used in receiving satellite communication systems, has been verified by a proper set of numerical simulations and experiments.
Stable Blue Quantum Dot LED with 23% external quantum efficiency
Authors: Zhang Wenjing , Li Bo , Chang Chun , Chen Fei , Zhang Qin , Lin Qingli , Wang Lei , Yan Jinhang , Wang Fangfang , Chong Yihua , Du Zuliang , Fan Fengjia , Shen Huaibin
Published: August 2023

The efficiency and stability of red and green quantum dot light-emitting diodes (QD-LEDs) have already met the requirements for displays. However, the performances of blue QD-LEDs, particularly pure blue QD-LEDs, are far inferior to that of their counterparts, hindering the commercialization of full-color QD-LED technology. Severe electron and hole accumulation at the hole transport layer (HTL) and quantum dot (QD) interface are the causes of efficiency loss and poor stability. Here, we propose inserting a protective layer (PBO (Poly-p-phenylene benzobisoxazole)) between the HTL and QD layer to suppress the accumulation of electrons and holes at the HTL/QD interface, reducing electron leakage and alleviating the damage to the HTL. This strategy enables us to achieve a record peak external quantum efficiency (EQE) of up to 23% and a record T50 operational lifetime of more than 41000 h with an initial brightness of 100 cd m-2 in pure blue QD-LEDs (emitting at 458 nm). The mitigated electron and hole accumulation at the HTL/QD interface is confirmed by capacitance-voltage characteristics and electro-absorption spectra.
The investigation of SNP in SOCS2 gene associated with mastitis resistance, milk composition, and quality in Awassi sheep.
Authors: hasan mubeen Ul , Ceyhan Ayhan
Published: August 2023

Background

Mastitis is commonly known as udder infection in dairy animals which in severe cases can cause death in livestock. Farmers face financial losses yearly because milk yield and components such as milk fat are reduced due to mastitis incidence. The milk products obtained from sheep milk all over the world rely on its high-fat content and increased milk yield. However, the incidence of clinical mastitis is a reason for increased somatic cell count. The milk fat content and yield are severely affected by the increased somatic cell count. Our study aimed to investigate the presence of a particular SNP rs868996547, which is related to milk somatic cell count, fat, and yield.

Methods

In this study, lactation data obtained from 210 healthy Awassi ewes were used. The milk content data, fat, protein, lactose, milk solids, and somatic cell count were collected. The DNA extraction was done by using a blood DNA extraction kit from Qiagen. To validate the presence of SNP we sent our SNP id number to Thermofisher Scientific for designing a custom SNP detection Assay.

Conclusion

Our results showed that SNP was present in some Awassi ewes while it was absent in others. The study results showed that there was a significant association between the SNP presence and SCC and milk fat content and milk yield.
Subclinical low vitamin D related to systemic sclerosis and resistant to long-term oral supplementation rapidly improves after two intramuscular injections of ergocalciferol: a retrospective observational case series.
Authors: Mallat Farid , Aoun Maroun , Jabbour Rita , Hachem Samir , Soutou Boutros , Helou Josiane
Published: August 2023

Background
Low vitamin D level is common in patients with systemic sclerosis since synthesis comprises cutaneous, gastrointestinal, hepatic, and renal steps. Oral supplementation brought less than a third of patients to a normal level. No study has yet reported effective alternatives.
Aims
The objective was to assess the response to intramuscular vitamin D in patients not responding to oral supplementation.
Methods
A retrospective series included patients, with systemic sclerosis and a history of subclinical poor vitamin D status that was resistant to at least 6 months of oral supplementation, to whom intramuscular vitamin D2 was administered. File data were collected for disease characteristics, vitamin D2 posology, and 25(OH)D serum levels.
Results
Twelve patients were identified, with a mean age of 51.9 years. All were women. Five had diffuse systemic sclerosisand seven had localized systemic sclerosis. The mean duration of the disease was 17.9 years, with a mean modified Rodnan skin score of 14. All patients were twice injected, at a 15-day interval, 300,000 IU of ergocalciferol into the anterior gluteus muscle. The mean serum level of 25(OH)D increased from 12.9 ng/mL before the first injection, to 23 ng/mL two weeks after the first injection, and 37.1 ng/mL four weeks after the second injection. No side effects were observed.
Conclusions
It is the first report of safely normalizing vitamin D levels with intramuscular ergocalciferol in patients with a connective tissue disease and a low vitamin D level refractory to oral supplementation.
Visual Field Progression Patterns in the Ocular Hypertension Treatment Study Correspond to Vulnerability Regions of the Disc
Authors: Leshno Ari , Bommakanti Nikhil , De Moraes Carlos Gustavo , Gordon Mae , Kass Michael , Cioffi George , Liebmann Jeffrey
Published: August 2023

Objectives

To determine the locations on the 24-2 visual field (VF) testing grid that are most likely to progress in patients with ocular hypertension (OHTN). Based on a structural model of superior and inferior areas of relative vulnerability at the optic disc, we hypothesized that the nasal and paracentral regions are more prone to show a reduction in sensitivity.

Methods

This is a posthoc analysis of the data from a randomized controlled clinical trial. Data collected from patients enrolled in the Ocular Hypertension Treatment Study (OHTS) Phases 1 and 2 were used. A pointwise analysis was applied to determine the progression patterns in the early and delayed treatment groups. Each group's progression rate and frequency were calculated for each of the 52 locations corresponding to the 24-2 VF strategy, using trend- and event-based analyses, respectively.

Results

For the event-based analysis, the events were most commonly found in the nasal and paracentral regions. The same regions, with some modest variation, were found to have the fastest rates of progression (ROP) measured with trend analysis. A similar pattern of progression was observed in both the early and delayed treatment groups.

Conclusions

Development of VF loss in ocular hypertensive eyes is consistent with the vulnerability zones previously described in glaucomatous eyes with established VF loss. This suggests that these locations need to be most carefully monitored.
CILPA: An Overlapping Community Detection Algorithm Based on Label Propagation and Node Information
Authors: Liu Hongtao , Shen Yanxiu
Published: August 2023

With the proliferation of complex networks, a large number of effective community detection methods have been developed. Of these, the label propagation-based approach for community detection has proven to be very suitable for community detection. However, it should be noted that this approach is stochastic and unstable. To address these issues, a CILPA method is proposed based on label Propagation and node information to identify a more rational community. First, we obtain the local influence reflecting the local spatial location of nodes based on their neighbourhood relationships. The importance of the nodes is subsequently obtained by combining topological information and local influence. Secondly, a label propagation strategy with preference selection is introduced to obtain stable overlapping communities based on neighbourhood information. More importantly, a label checking strategy is articulated to reduce the impact of sparse connections. Extensive experiments on the LFR benchmark network and real-world networks demonstrate that the approach is both stable and effective.
Economic and Psychosocial Impact of Covid-19 Vaccine non-compliance amongst Australian Healthcare Workers.
Authors: McDonald Charles I , Parry Peter , Rhodes Peter
Published: August 2023

Background In September 2021 public health employees in the state of Queensland, Australia, were directed to accept Covid-19 vaccination, or risk disciplinary procedures, suspension and termination of employment. We hypothesised those non-compliant with this mandate would suffer economic hardship, psychosocial harm and possible suicide risk. Wider ramifications might include loss of highly skilled personnel from the workforce. Methods In early 2023 an online survey was disseminated through social media. This consisted of 63 questions on employment; exemptions; natural immunity; disciplinary action; appeals; economic and psychosocial harms. Results Of 369 participants, the majority were female (85.9%) and of nursing profession (55%). We found a reduction in income (reported by 94.4%). The majority (94.9%) believed psychosocial harm was caused as a direct result of state government policy. Anxiety and depression were experienced by 92.1% while 34.1% had had thoughts of suicide. Conclusion This survey of staff disciplined for non- compliance with Covid-19 vaccine mandates in the state of Queensland, Australia, found significant harm. Impact was biased against females and single parent households. Natural immunity was dismissed by authorities. The disciplinary processes failed to consider economic or psychological damage. The devastation caused could have intergenerational impact beyond that revealed in this study.
Tenacious Fish Swarm Optimization Based Hidden Markov Model (TFSO-HMM) for Augmented Accurate Cotton Leaf Disease Identification and Yield Prediction
Authors: Govindasamy S , Jayaraj D
Published: August 2023

This research presents an innovative approach called Tenacious Fish Swarm Optimization based Hidden Markov Model (TFSO-HMM) for augmented accurate cotton leaf disease identification and yield prediction. Cotton leaf diseases significantly threaten crop productivity, requiring timely detection and precise prediction for effective disease management. The proposed TFSO-HMM framework combines the strengths of Tenacious Fish Swarm Optimization (TFSO) and the Hidden Markov Model (HMM) to address the challenges associated with disease identification and yield prediction in cotton plants. TFSO, a nature-inspired optimization algorithm, optimizes the classification process, enhancing the accuracy of disease identification. By harnessing the collective intelligence of fish swarms, TFSO intelligently explores the search space to identify the optimal solution. The selected information is then incorporated into the HMM framework, which captures the temporal dependencies in disease progression and yield prediction. HMM's sequential modelling approach facilitates understanding the dynamic behaviour of cotton leaf diseases over time, leading to more accurate predictions. Experimental results on a comprehensive dataset demonstrate the superior performance of the TFSO-HMM method over existing approaches in terms of accuracy and predictive capability. The augmented accuracy achieved through TFSO-HMM enables early detection and precise prediction of cotton leaf diseases, enabling timely interventions for disease management and maximizing crop yield.
Multiple System Atrophy With Intractable Fever: A Case Report
Authors: yu dandan , Li He , Tang Wei , Wang Wei
Published: August 2023

Background
Multiple system atrophy (MSA) is a rare neurodegenerative disease with rapid progression and poor prognosis. It mainly affects the extrapyramidal system, cerebellum and autonomic nervous system as well as the hypothalamus.
Case presentation:
A 71-year-old woman who had a fever for two months. Although there were evidence of urinary tract infection and pulmonary infection, her temperature did not decrease after treatment. Six years ago, she gradually developed dysuria, unstable walking and bradykinesia. Magnetic resonance imaging (MRI) revealed the atrophy of the brainstem and cerebellum. Hot-cross-bun sign (HCB) in pons indicated that she was diagnosed with possible multiple system atrophy. The involvement of the hypothalamus lead to the disorder of thermoregulation and hormone secretion. Her condition improved after the treatment of bromocriptine.
Conclusions
Our case adds to the number of cases of multiple system atrophy as a rare symptom of intractable fever. It also provides a new treatment idea for multiple system atrophy.
Endoscopic injection of N-butyl-2-cyanoacrylate with Lauromacrogol causing tiny emboli formation in the right atrium: a case report
Authors: Hu W. J. , Hu J. Q. , Lv D.N. , Han B.
Published: August 2023

Background In previous case reports, ectopic embolism caused by endoscopic cyanoacrylate injection was identified and diagnosed several days after the patient had undergone treatment. It is rare for an embolus to be observed in time for the patient to undergo endoscopic treatment. This may be the first case report in which emboli were immediately observed during endoscopic cyanoacrylate injection.Case presentation A male patient in his mid-40s with gastric variceal hemorrhage developed a decreased blood pressure immediately after cyanoacrylate injection with Lauromacrogol. The patient’s blood pressure was restored after repeated administration of phenylephrine. Multiple tiny emboli entering the pulmonary circulation through the right atrium were observed on echocardiography, which were presumed to have contributed to the patient’s intraoperative hypotension. Postoperatively, the patient did not show any clinical signs of ectopic embolism and was safely discharged on postoperative day 8.Conclusions Hemodynamic fluctuations after endoscopic cyanoacrylate injection suggest the possibility of microemboli entering the pulmonary circulation. Transthoracic echocardiography can help to promptly detect microemboli.
Compartmentalized Mitochondrial Ferroptosis Converges with Optineurin-mediated Mitophagy to Impact Airway Epithelial Cell Phenotypes and Asthma Outcomes
Authors: Wenzel Sally
Published: August 2023

A stable mitochondrial pool is crucial for healthy cell function and survival. Altered redox biology adversely affects mitochondria through activation of a variety of cell death and survival pathways, yet the understanding of mitochondria and their dysfunction in human disease states is modest. Ferroptosis, an iron dependent, oxidative stress associated programmed cell death pathway, is tightly associated with the generation of reactive hydroperoxy-phospholipids and development of mitochondrial abnormalities. Mitophagy is a programmed phospholipid-membrane associated process to preserve mitochondria and prevent cell death. This report identifies a lipoxygenase orchestrated, mitochondrially compartmentalized ferroptotic process, not associated with cell death, but with fewer and/or dysfunctional mitochondria. This ferroptosis tightly couples with Optineurin-PINK-PARKIN mediated mitophagy which limits actual mitochondrial loss and protects against cell death. These combined processes lead to markedly altered epithelial cell phenotypes which associate with worsened asthma severity. Targeted interventions in the ferroptotic portion of this process could preserve mitochondria, reverse cell phenotypic changes and improve disease outcomes.
Temporal and spatial variation characteristics of lakes in Qilian Mountains from 1990 to 2020 and analysis of meteorological factors
Authors: Zhao Tingting , Zhang Xiaoping , Li Zongxing , Chen Hu , Li Jiayao
Published: August 2023

Lakes are sensitive indicators of climate change. Based on the lake dataset and Landsat remote sensing data, we analyzed the changes in area and number of lakes(>1km2) in the Qilian Mountains from 1990 to 2020, as well as the boundary changes of lakes(>100km2). In addition, we discussed the impact of climate change on lake area. The results showed that: (1) From 1990 to 2020, the total area and total number of lakes in the Qilian Mountains showed an overall increasing trend, with a total area increase of 492.47km2 and a total number increase of 10. Among them, Qinghai Lake, Hala Lake, Xiao Qaidam Lake, and Nauru Nor Lake showed an overall expansion trend, while Caka Salt Lake and Da Caidam Lake showed an overall shrinking trend. (2)The main reasons for the expansion of Qinghai Lake and Hala Lake was the increase in precipitation, while the main reason for the expansion of Xiao Qaidam Lake and Nauru Nor Lake was the increase in temperature and precipitation. The main reason for the shrinkage of Caka Salt Lake was the enhancement of evapotranspiration. (3) Lakes in the Qilian Mountains were mainly expanding, which has a good promoting effect on improving the ecological environment of this region and even larger area. However, we should also pay attention to problems such as floods and salt-alkali land caused by lake expansion in a timely manner. In addition, governments and all sectors of society should take corresponding measures to alleviate further shrinkage of Caka Salt Lake.