bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of the operation of the turnstile support-fastening device during the transportation of a long-dimensional heavy load
Authors: Musayev Janat , Solonenko Vladimir , Zhauyt Algazy , Zhunisbekov Seitbek , Smailova Gulbarshyn , Buzauova Toty
Published: May 2023

The article analyzes the motion of a wheelset along a path of unequal length with shaft wear of the rails. The authors have studied the influence of an external disturbing force on the parametric system “wheel-rail”. The considered problem is solved on the basis of a mathematical model of interaction of a pair of wheels and an unequal rail, taking into account the additive effect of unequal stiffness on a rail vehicle. It is shown that taking into account the unequal elasticity of the track in the longitudinal direction allows to determine more precisely the resonance regions and to evaluate the decrease or increase of the acceleration level and the amplitudes of the impact of the unsprung mass of the rail vehicle.
Pitch stability of offshore waste collection platform hull with NACA fin stabilizers
Authors: Wen Ziqi , Si Mingqing , Wang Chun , Yang Fuqin
Published: May 2023

In view of the safety problems caused by the pitch stability of the offshore waste collection platform, the three-dimensional model of the collection platform hull was established by SolidWorks software, and the influence of the installation parameters of NACA fin stabilizers on the pitch stability of the collection platform hull was discussed based on three-dimensional potential flow theory. The results show that the installation parameters of NACA fin stabilizers have an essential influence on the pitch stability of the collection platform hull. The larger the positive installation angle and the farther away the bow fin is from the midship, the smaller the peak values of pitch motion response. While the tail fin is not suitable to be installed near 600 mm of midship to avoid severe longitudinal movement of the hull.
Dynamic response of tunnel through water-rich liquefiable layer based on UBC3D-PLM model
Authors: Feng Yi
Published: May 2023

This study investigates the dynamic response of tunnels crossing liquefiable layers, with a focus on the Chongming Line Project of Shanghai Rail Transit. Through numerical analysis using Plaxis2D geotechnical simulation software, the study shows that the UBC3D-PLM constitutive model effectively simulates pore pressure dynamic response in liquefiable layers. Furthermore, the study finds that drainage pile reinforcement on both sides of the tunnel limits liquefaction of liquefiable soil under dynamic load. The rate of EPR accumulation accelerates and the time to reach the peak of EPR ratio shortens with increasing dynamic load intensity. However, the accumulation growth pattern of EPR ratio in liquefiable soil layers remains the same after the dynamic load intensity reaches a certain threshold.
Impact of cement and filler-asphalt ratio on the properties of asphalt mortar
Authors: Song Mei , Zheng Suining , Mi Haichen , Xu Peng , Zhang Chongshang
Published: May 2023

Matrix and SBS modified asphalt mortar were prepared by replacing mineral powder with cement under different filler-asphalt ratios. The variation laws of ductility, softening point, penetration, cone penetration, and Brookfield rotational viscosity of the two kinds of pastes with filler-asphalt ratio were studied. The shear strength of the two kinds of asphalt mortar was calculated. And the viscosity-temperature curve was established. The best filler-asphalt ratio was recommended. The results show that the addition of cement and the increase of filler-asphalt ratio will reduce the ductility, penetration, and cone penetration of asphalt mortar, while improve the softening point, shear strength, and viscosity. In a specific range of filler-asphalt ratios, cement can improve the high-temperature performance of asphalt mortar without significant impact on the low-temperature performance.
Investigation on the flow-induced tangential force characteristic of labyrinth seals under different operation parameters
Authors: Gu Qianlei , Yang Jiangang
Published: May 2023

The flow-induced tangential force Ft is crucial for the annular gas seal stability. In this paper, a three-dimensional CFD model is established to study the Ft characteristics of the labyrinth seal. The overall Ft of the seal section is decomposed into each seal cavity. The Ft characteristic of each seal cavity versus rotation speed ω and inlet pressure pin is analyzed. The result shows that the sign of Ft in each seal cavity changes from the negative to the positive along the leakage direction, resulting in a specific crossing tooth number Nc at which Ft≈ 0 N. When the tooth number is smaller than Nc, the seal stability increases with the increase of ω and pin. When the tooth number is larger than Nc, the trend is reversed. When the tooth number equals Nc, the seal stability is in a critical state, showing no dependency to the ω and pin. The Nc is a novel index for the labyrinth seal stability.
Dynamics analysis of the nonlinear rotor system with Geislinger coupling
Authors: Wang Jinhong , Li Zhenping , Li Hongguang , Zhang Wendi , Bao Ke
Published: May 2023

Rotor systems with coupling consist of two rotors, rolling bearings, sealing components, and nonlinear coupling. Currently, rotor systems with coupling are widely used in marine engines, aerospace engines, and various vehicle engines. In studies of rotor systems with coupling, the coupling connecting both sides of the rotor are often regarded as a linear stiffness unit. But in actual engineering, the torsional stiffness of the coupling varies with the speed of the system, and the variation of the coupling stiffness will affect the dynamic characteristics of the rotor. Based on the above phenomena, this study establishes the rotor model of driveshaft-Geislinger coupling-driveshaft in diesel engines and obtains the modal, frequency, and transient response analysis results of the rotor system with nonlinear Geislinger coupling. The modal, frequency, and transient response analysis results of the nonlinear model are compared with those of the linear model. This study can provide theoretical support for the vibration analysis of nonlinear rotor systems with connected Geislinger coupling.
Fluid-induced vibration analysis of pipe based on the transfer matrix method and added mass, added damping analogy method
Authors: Gao Chao , Zhou Yulong , Zhang Shunfeng , Shi Shuangxia , Xiao Bin , Liu Zhigang
Published: May 2023

In this paper, the 14-equations of pipeline system were written as matrix forms in frequency domain with Laplace transformation and further solved by transfer matrix method (TMM). Moreover, the added mass and added damping models were established and combined with the TMM for decoupling investigated the Turbulence-Induced Vibration (TIV) of clamped-clamped pipe system. Firstly, the feasibility of the TMM for analyzing the frequency responses of water-filled pipelines with free support boundary conditions and the added mass, added damping for decoupling investigation of TIV were finished verify. Then the frequency responses for Fluid-Structure Interaction (FSI) problems of pipeline with different flow velocities were acquired. The results indicate that the calculated frequencies agree well with corresponding data yield from Galerkin method. And the increasing flow velocity results in a decreased amplitudes of the frequency responses due to the effect of fluid added damping. Those results of the research in this paper implied that the decoupling method composed of the TMM that considered the added mass and added damping is validity and accuracy for frequency response analysis of the pipeline.
Dynamic modeling and analysis of a vibration-driven robot driven by a conical dielectric elastomer actuator
Authors: Wang Xiaojian , Li Hongguang
Published: May 2023

This article aims to establish a theoretical model of a vibration-driven robot driven by a conical dielectric elastomer actuator and analyze its characteristics, in order to make up for the lack of theoretical model construction and parameter evolution analysis for this type of robot. This article introduces a vibration-driven robot driven by a conical dielectric elastomer actuator, and then establishes its dynamic model based on its electromechanical coupling and viscoelastic characteristics. Subsequently, simulation research is conducted using this model. Overall, this article derived a dynamic equation that can be applied to this type of robot, analyzed its motion characteristics, studied the effects of different parameters on it, and discussed the influence of viscoelasticity on vibration-driven robots. The proposed dynamic model and evolution law of vibration robots can provide theoretical guidance for subsequent control and optimization.
Iğdır İlinde Görülen Arı Kolonisi Kayıplarında Viral ve Paraziter Etkenlerin Rolü
Authors: KIZILTEPE Şemistan , AKPINAR Rahşan , AKMAN Ayhan , KAYA Selma , ÇELİK Sema Nur
Published: May 2023

Bal arılarında görülen koloni kayıplarında bakım ve beslenme hataları, pestisitler, arı hastalıkları ve zararlıları, küresel ısınma ve stres gibi birçok faktör rol oynamaktadır. Arı hastalıkları arasında yer alan
viral ve paraziter enfeksiyonlar arı işletmelerinde önemli ekonomik kayıplara ve zaman zaman da kolonilerin sönmesine neden olabilmektedir. Bu çalışmada, Iğdır ilinde bulunan, koloni kaybı geçmişi olan 64 işletme belirlenmiş, bu işletmeleride görülen koloni kayıplarında viral, paraziter ve mikrosporodial etkenlerin rolü araştırılmıştır. Bu amaçla yedi viral etken; Akut arı felci virusu (Acute Bee Paralysis Virus-ABPV), kronik arı felci virusu (Cronic Bee Paralysis Virus-CBPV), siyah kraliçe hücre virusu (Black Queen Cell Virus-BQCV), deforme kanat virusu (Deforme Wing Virus-DWV), torba çürüklüğü virusu (SacBrood Virus-SBV), Kaşmir arı virusu (Kashmir Bee Virus-KBV), İsrail akut arı felci virusu (Israeli Acute Paralysis Virus-IAPV) ile nosemosis ve varroasis yönünden incelenmiştir. Araştırma sonunda viral etkenlerden ABPV, BQCV, CBPV, DWV, KBV, SBV ve IAPV sırasıyla %1.56, %76.56, %4.68, %50, %1.56, %81.25, %20.31 oranlarında; mikrosporodial hastalıklardan nosemosis % 60.93 oranında bulunmuştur. Nosemosise neden olan etken Nosema ceranae olarak belirlenmiştir. Ayrıca koloni kaybı gözlenen arı işletmelerinin hiçbirinde Varroa sp. tespit edilmemiştir. Sonuç olarak, koloni kaybı gözlenen arı işletmelerinde miks enfeksiyonların görüldüğü ve bu görülen miks enfeksiyonların koloni kayıplarında etkili olabileceği düşünülmektedir.
Determination Conservation Priority Areas and Taxa in Terms of Birds: The Case of Aksaray
Authors: ÇAKMAK Emel , AKIN PEKŞEN Çiğdem
Published: May 2023

Growing environmental challenges worldwide and the lack of resources to tackle them require conservationists to set priorities for action. As known; protected areas will be needed as species change their distribution over time due to global climate change, drought, and complete habitat destruction. Although; conservation targets have been met for most species, some conservation features remain unprotected, especially for threatened bird species. There are certain habitat types in Aksaray province where target species belonging to different bird groups are concentrated. Herein; we identify these priority areas for conservation for the current and future estimated distributions of bird species. For this purpose; field studies have been carried out for two years (2015-2017) to represent different habitat types besides bird species detected within the borders of the province. According to our findings; three different habitats (wetland, swamp, and steppe) rich in target species were determined as priority areas for protection. In addition, five different bird species (Vanellus vanellus, Limosa limosa, Numenius arquata, Circus macrourus, Streptopelia turtur) observed in these habitats are in the Vu (Vulnerable) and NT (Near Threatened) categories according to the International Union for Conservation of Nature (IUCN) Red List. As a result;both the protection and monitoring of the identified habitats and taxa that directly reflect the health of the habitat will facilitate the ustainability of priority areas in future. This study could be a resource for future regulation of conservation strategies
Histo-Anatomical Characteristics of Some Endemic Species of Linum (Linaceae)
Authors: ULCAY Sibel
Published: May 2023

In this study, endemic two species belonging to the genus Linum and distributed in Türkiye are investigated. The outermost layer of the Linum flavum subsp. scabrinerve (P.H. Davis) P.H. Davis root, according to its cross-section, is covered with epidermis cells. In the stem cross-section, the vascular bundles are in the form of a continuous ring and sclerenchyma cells are determined on it. The lower surface and the upper surfaces of leaf have 88 and 51 stomata respectively. It contains few glandular hairs. The root of Linum hirsutum subsp. pseudoanatolicum P. H. Davis have secondary growth. Periderm cells on the outside are oval or isodiametric in shaped. In the stem cross-section, vascular bundles are in the form of a continuous ring. The cortex layer, consists of oval or rectangular shaped 9-10 rows of parenchymatous cells. The lower surface and the upper surfaces of leaf have 48 and 46 stomata respectively. No glandular or non-glandular hairs are found on the epidermis. As a result, anatomical comparison of two different taxa belonging to the same genus was made with this study. According to the findings, the root structures of the species, the presence of sclerenchyma on the stem, the size of the stomata of the leaf, mesophyll types and the presence of glandular hairs are different from each other.
Derin Evrişimli Sinir Ağları Kullanılarak Pirinç Hastalıklarının Sınıflandırılması
Authors: VEZIROGLU Erkan , PACAL Ishak , COŞKUNÇAY Ahmet
Published: May 2023

Çeltik, temel bir gıda kaynağıdır ve endüstride sıkça kullanılan nadir bitkilerden biridir. Çeltik yaprak hastalıklarının erken teşhisi, ekin hasarını en aza indirmek için büyük önem taşımaktadır. Son yıllarda, derin öğrenme tabanlı bilgisayar destekli sistemler, ziraat sektöründe oldukça önem kazanmış ve çeşitli uygulamalarda etkin rol almıştır. Bu sistemler, hastalıkların erken teşhis edilmesine yardımcı olmakla kalmayıp, aynı zamanda tarım alanında çalışanlara da ikincil bir yardımcı olarak katkı sağlamaktadır. Bu çalışma, çeltik yapraklarında bulunan hastalıkların erken teşhisinde derin öğrenme yöntemlerinin etkinliğini araştırmayı amaçlamaktadır. Bu amaç doğrultusunda, VGG, ResNet, DenseNet, EfficientNet, Inception ve Xception gibi en popüler evrişimsel sinir ağları (CNN), halka açık Paddy Doctor veri seti üzerinde değerlendirilmiştir. Her bir modele, veri ön işleme, veri artırma, hiper-parametre optimizasyonu ve öğrenme aktarımı gibi güncel teknikler uygulanarak test setindeki teşhis doğruluğunun başarımı arttırılmıştır. Ayrıca her bir mimarideki modellerin birbirine ve diğer mimarilerdeki modellere göre çeltik yapraklarındaki hastalıkların teşhisindeki başarımları detaylı bir şekilde karşılaştırılmıştır. Deneysel sonuçlar, EfficientNetv2_Small modelinin %98.01 test doğruluğu ve %97.99 F1-skor değerleriyle tüm modellerden daha iyi performans sergilediğini ve literatürdeki diğer çalışmaları geride bıraktığını göstermiştir. Bu çalışma, CNN mimarilerinin yüksek bir performans gösterdiğini ve bu tür hastalıkların erken teşhisinde ziraat mühendislerine ve çiftçilere etkili bir şekilde yardımcı olabileceğini göstermektedir
Public-private partnership in the health care sector: The case of Albania
Authors:   University College Bedër, Ombashi Besa , Cepiku Denita ,   University of Rome Tor Vergata, Persiani Niccolò ,   University of Florence
Published: May 2023

This paper aims to analyse the implementation of public-private partnership in the healthcare sector as a way to use private financing and expertise to achieve public policy goals in Albania. The study consists of an overview of the four public-private partnerships in the healthcare sector and the detailed analysis of major charateristics of two of them. The healthcare sector as a study object was chosen due to the implemented reforms aimed to improve the public health system, and the quality of service. The case study is based on the data collected from the analysis of the contracts signed between the parties, reports, interviews and the documents on the management of these contracts. The research also relies on secondary sources of information focused on legislation and other government legal acts. The article highlights the need to adopt a long-term strategy in the field of healthcare as well as applicable standards of monitoring of the implementation procedures. During the COVID-19 pandemic time, the implementation of these contracts became even more important for a the country where the contracts were treated as a way to improve the quality of public services. A number of offered recommendations in the paper may encourage further research in this field of study.
Effects of raw water quality on the adsorptive removal of 2-methylisoborneol by powdered activated carbon under non-equilibrium conditions
Authors: Asada Yasuhiro , Hayasaka Shunichi , Miyoshi Taro , Tokuyasu Marina , Akiba Michihiro
Published: May 2023

Natural organic matter contained in natural water inhibits the adsorptive removal of 2-methylisoborneol (2-MIB) by powdered activated carbon (PAC). We investigated the relationship between water-quality indices and the adsorptive removal of 2-MIB by PAC. We collected three different raw water (i.e., two lake water and one river water) samples twice per month for 10 months. We characterized the raw water using total organic carbon concentration, ultraviolet absorption at 254 nm, electrical conductivity, and excitation–emission matrix analysis. The results were compared with 2-MIB removal rates evaluated from PAC adsorption experiments and revealed that there was no universal indicator that could explain the trends of the 2-MIB removal rate during the overall experimental period. The correlation trends between 2-MIB removal rates and water-quality indices differed significantly between the high and low water-temperature periods. Several water-quality indices related to the organic matter associated with biological processes, especially algal activities (i.e., soluble microbial products, chlorophylls, and phycocyanin), exhibited significant correlations with the 2-MIB removal rates (|R| > 0.7) under certain conditions (e.g., high lake-water temperature). Both the parallel factor (PARAFAC) analysis and fluorescence regional integration (FRI) method could evaluate such behaviors after including the regions associated with algal organic matter in the calculation.
Process performance evaluation of faecal matter treatment via black soldier fly
Authors: Achieng Oyoo Valary , Riungu Joy Nyawira , Dey Prasanta , Kirimi James Gitonga , Matheka Rosemary M.
Published: May 2023

Sustainable management of faecal matter is a prevailing global challenge. In this study, we assessed black soldier fly (BSF) process performance during co-treatment of faecal matter using kitchen waste (FM:KW) to formulate five feeding substrates. About 1 kg of each feed substrate was treated utilizing 5 g of 5-day-old BSF larvae after which 100 larvae were randomly picked at 3-day intervals from each treatment to monitor the larval weight gain across the treatment process. Larval days to 50% pupation, mean pupal yield, waste reduction rate (WR), bioconversion rates (BRs), and feed conversion rates (FCRs) were monitored for the process performance. Study results showed that the substrate 1:1 attained the best measures of high WR, waste reduction index (WRI), BR, FCR, and overall pre-pupal yield within a shorter development time. Further, we modelled the BSF larval weight gain using the modified Gompertz model to assess the least time for optimal biomass conversion for animal feed processing. The BSF larvae exhibited an S-shaped growth curve and the modified Gompertz model adequately quantified the BSF larval growth performance. In the future, our methodology will pave the way for effective treatment and valorization of faecal matter from onsite sanitation facilities, manage organic municipal wastes and provide alternative animal feed and bio-fertilizer.
Anti-obesity Properties of Phytochemicals: Highlighting their Molecular
Mechanisms against Obesity
Authors: Poulios Efthymios , Koukounari Stergia , Psara Evmorfia , Vasios Georgios K. , Sakarikou Christina , Giaginis Constantinos
Published: May 2023

Obesity is a complex, chronic and inflammatory disease that affects more than
one-third of the world’s population, leading to a higher incidence of diabetes, dyslipidemia,
metabolic syndrome, cardiovascular diseases, and some types of cancer. Several
phytochemicals are used as flavoring and aromatic compounds, also exerting many benefits
for public health. This study aims to summarize and scrutinize the beneficial effects
of the most important phytochemicals against obesity. Systematic research of the current
international literature was carried out in the most accurate scientific databases, e.g.,
Pubmed, Scopus, Web of Science and Google Scholar, using a set of critical and representative
keywords, such as phytochemicals, obesity, metabolism, metabolic syndrome,
etc. Several studies unraveled the potential positive effects of phytochemicals such as berberine,
carvacrol, curcumin, quercetin, resveratrol, thymol, etc., against obesity and
metabolic disorders. Mechanisms of action include inhibition of adipocyte differentiation,
browning of the white adipose tissue, inhibition of enzymes such as lipase and amylase,
suppression of inflammation, improvement of the gut microbiota, and downregulation
of obesity-inducing genes. In conclusion, multiple bioactive compounds-phytochemicals
exert many beneficial effects against obesity. Future molecular and clinical studies
must be performed to unravel the multiple molecular mechanisms and anti-obesity activities
of these naturally occurring bioactive compounds.
LncRNA GAS5 as an Inflammatory Regulator Acting through Pathway in
Human Lupus
Authors: Xiao Jianping , Wang Deguang
Published: May 2023

Aims:

To investigate the contribution of GAS5 in the pathogenesis of SLE.

Background:

Systemic Lupus Erythematosus (SLE) is characterized by aberrant activity of the immune system,
leading to variable clinical symptoms. The etiology of SLE is multifactor, and growing evidence has
shown that long noncoding RNAs (lncRNAs) are related to human SLE. Recently, lncRNA growth arrest-specific
transcript 5 (GAS5) has been reported to be associated with SLE. However, the mechanism between
GAS5 and SLE is still unknown.

Objective:

Find the specific mechanism of action of lncRNA GAS5 in SLE.

Methods:

Collecting samples of the SLE patients, Cell culture and treatment, Plasmid construction, and transfection,
Quantitative real-time PCR analysis, Enzyme-linked immunosorbent assay (ELISA), Cell viability analysis,
Cell apoptosis analysis, Western blot.

Results:

In this research, we investigated the contribution of GAS5 in the pathogenesis of SLE. We confirmed
that, compared to healthy people, the expression of GAS5 was significantly decreased in peripheral monocytes
of SLE patients. Subsequently, we found that GAS5 can inhibit the proliferation and promote the apoptosis of
monocytes by over-expressing or knocking down the expression of GAS5. Additionally, the expression of
GAS5 was suppressed by LPS. Silencing GAS5 significantly increased the expression of a group of
chemokines and cytokines, including IL-1β, IL-6, and THFα, which were induced by LPS. Furthermore, it was
identified the involvement of GAS5 in the TLR4-mediated inflammatory process was through affecting the activation
of the MAPK signaling pathway.

Conclusion:

In general, the decreased GAS5 expression may be a potential contributor to the elevated production
of a great number of cytokines and chemokines in SLE patients. And our research suggests that GAS5 contributes
a regulatory role in the pathogenesis of SLE, and may provide a potential target for therapeutic intervention.
Medicinal Chemistry for Sustainable Development
Authors: da S.M. Forezi Luana , Ferreira Patricia G. , de Carvalho Alcione Silva , de C. da Silva Fernando , Ferreira Vitor F.
Published: May 2023

Pharmaceutical chemistry has many industrial processes that must be studied and adapted to a new reality where the environment must be the focus of all production chains. Thus, new tech-nologies that are cleaner and use renewable sources of raw materials still need to be developed and applied to materials that go to the market, and they need to reach a level that is less harmful to the environment. This applies especially in areas related to the pharmaceutical industries since chemical products are used in the production of medicines and used in many other areas of everyday life and are included in the Sustainable Development Goals proposed by the United Nations. This article in-tends to provide insight into some relevant topics that can stimulate researchers toward medicinal chemistry that can contribute to a sustainable future of the biosphere. This article is structured around four interconnected themes that influence how green chemistry can be important for a future where science, technology and innovation are key to mitigating climate change and increasing glob-al sustainability.
The Voyage of Natural Chalcone: Isoliquiritigenin
Authors: Rani Himanshu
Published: May 2023

This review aims to provide a comprehensive summary of the pharmacological effects of
isoliquiritigenin, a natural chalcone. The data was gathered from a variety of research papers published
till 2022. The extensive pharmacological features of ISL, including its anti-inflammatory,
anti-influenza, anti-tyrosinase, anti-bacterial, anti-sarcoma, anti-oxidative, anti-leiomyoma, anticholera,
anti-asthma, anti-diabetic, and anti-cancer activity, neuroprotective, hepatoprotective, and
cardioprotective effects, may explain its practical applicability in the treatment and prevention of
many illnesses. However, to confirm the target-organ toxicity or side effects, more research is required.
The creation and design of new ISL analogues based on previously discovered techniques
may benefit from this review.
Birth Order and its Effect on Children’s Dental Anxiety and Behavior during Dental Treatment
Authors: Alabdullatif Mujtaba Mohammed , Sabbagh Heba Jafar , Aldosari Fawziah Musaad , Farsi Najat Mohammed
Published: May 2023

Objectives:

To investigate the association between dental anxiety and birth order among children seeking dental treatment at King Abdulaziz University Dental Hospital, Jeddah, Saudi Arabia.

Methods:

A total sample of 306 children aged 6-12 years were enrolled in a cross-sectional descriptive study. Demographic background data on the family and childbirth order were collected using a validated questionnaire. The Abeer dental anxiety scale (ADAS) was used to assess the dental anxiety level, while the Frankl scale was used to assess behavior during dental treatment. Binary Regression analysis was carried out to evaluate the effect of sociodemographic factors on the child’s anxiety and behavior according to the ADAS and Frankl scale, respectively.

Results:

The childbirth order had a significant effect on the anxiety score (p<0.0001). The ADAS score in middle-born children was statistically significantly lower than that of only children, first-borns and last-borns (p=0.018). Further, there was a statistically significant effect of childbirth order on behavior according to the Frankl scale (p<0.0001).

Conclusion:

The presence of siblings and childbirth order are significant indicators of children’s behavior and anxiety during dental treatment. This study provides valuable information that can help pediatric dentists plan behavior management for children.
Color Stability and Degree of Conversion of Light-cured Resin Cements
Authors: Andreucci Ana Carolina , Baroudi Kusai , Freitas Maiara Rodrigues , Amaral Marina , Aguiar Flavio Baggio , Zanatta Rayssa Ferreira , Liporoni Priscila Christiane Suzy
Published: May 2023

Objective:

To evaluate the color stability and degree of conversion of light-cured resin cement with different activator-initiator systems using LED lights with different wavelengths (polywave x monowave).

Materials and Methods:

Sixteen resin cement samples were made using a circular silicone matrix (7 mm diameter, 0.5 mm thickness) for each of the following tested materials: Variolink Esthetic LC (Ivoclar, color Light+); RelyX Veneer (3M ESPE, color A1); Filtek Z350XT flow resin (3M ESPE, color A1); Allcem Veneer APS (FGM, color A1); NX3 Light cure (Kerr, color A1). Half of the samples were photocured with a monowave LED light (Elipar Deep Cure), and the other half with a polywave LED light (Valo Grand). The initial color of each cement was measured using a high translucency ceramic sample simulating ceramic venner. Color measurements were performed with a reflectance colorimetric spectrophotometer and the data was collected according to the CIE L* a* b* system in two steps. The degree of conversion was measured using an infrared spectrometer by Fourier transform (FTIR / ATR) and the absorbance method. Statistical analysis was performed using ANOVA repeated measures and Tukey’s post hoc tests (p <0.05).

Results:

For the color analysis, there were no significant differences between the cement related to time versus light curing (p = 0.084) and also related to time versus cement versus light curing (p = 0.142). Among the factors, there was only a statistically significant difference for the type of cement (p <0.01). In contrast, for the photocuring device (p = 0.504) and the interaction between them (p = 0.738), there was no significant difference. For the degree of conversion analysis, it showed a statistically significant difference for both factors, resin cements (p <0.01) and light curing units (p <0.01).

Conclusion:

The color stability of RelyX cement is low compared to other cements, while Variolink cement presented the best degree of the conversion value.
Improved DevOps Lifecycle by Integrating a Novel Tool V-Git Lab
Authors: Mishra Anurag , Sharma Ashish
Published: May 2023

Aims:

We propose a tool that can automatically generate datasets for software defect prediction
from GitHub repositories

Background:

DevOps is a software development approach that emphasizes collaboration, communication,
and automation in order to improve the speed and quality of software delivery.

Objective:

This study aims to demonstrate the effectiveness of the tool, and in order to do so, a series
of experiments were conducted on several popular GitHub repositories and compared the performance
of our generated datasets with existing datasets

Method:

The tool works by analyzing the commit history of a given repository and extracting relevant
features that can be used to predict defects. These features include code complexity metrics,
code churn, and the number of developers involved in a particular code change.

Result:

Our results show that the datasets generated by our tool are comparable in quality to existing
datasets and can be used to train effective software defect prediction models.

Conclusion:

Overall, the proposed tool provides a convenient and effective way to generate highquality
datasets for software defect prediction, which can significantly improve the accuracy and
reliability of prediction models.
ZnO Thin Films: Fabrication Routes, and Applications
Authors: Pirposhte M.A.
Published: May 2023

Thin films have become a hot topic in the field of nanotechnology. Due to their optical and electrical characteristics, thin-film semiconductor oxides are among the semiconductor oxides with the greatest range of applications. The most popular semiconductor component is zinc oxide (ZnO). ZnO, a wide bandgap semiconductor (Eg = 3.37 eV at room temperature), have been widely used in electronic, optoelectronic, and information technology device platforms. Nano-ZnO thin films have a wide range of applications due to their remarkable properties. There are several methods for developing a thin layer of the ZnO nanomaterial. Sputtering, chemical vapor deposition (CVD), molecular beam epitaxy, pulsed laser deposition (PLD), and spray pyrolysis are among these methods. Although sputtering is the most commonly used method for high-quality applications, chemical vapor deposition and spray pyrolysis are also popular due to their low cost and ease of use. This chapter provides a brief overview of the various fabrication routes, characterization techniques, and applications of ZnO thin films, allowing us to investigate the chemical, structural, optical, and electrical properties of ZnO thin films, as well as their various applications.
Anti-suicide themes in popular Ghanaian music
Authors: Adinkrah Mensah
Published: May 2023

The current article presents the results of a content analysis of a popular Ghanaian gospel song with anti-suicide themes and lyrics that have great potential to prevent suicidal behavior among listeners. The analysis was conducted against a backdrop of public intimations that suicide rates in the country were rising. The results of the analysis show that several lines in the lyrical text implore the listener to resist suicide while offering messages of patience, hope and encouragement, that can serve as preventative to suicide. It is impossible to quantify the full impact of the song on listeners and there is no way of knowing how many suicides have been prevented by the lyrical text of the song and the accompanying video presentation of events captured in the video. That the song has had a powerful impact on people who listen to it is evident in the listeners/viewers comments left at the site of the song/video. The final segment of the article provides excerpts from some individuals’ experiences with the song. The message of hope in the song, that things will get better has had a major effect on people.
The Effects of Loneliness on the Aged: A Review
Authors: rokach ami
Published: May 2023

Social support has been shown to have many positive effects on our lives, health, and ability to grow and flourish. Lack, or diminished social support results in loneliness. This thematic review focuses on the elderly, and the loneliness that is part of the life of many of them. The review highlights the social connections and the expectations that the elderly may have of them, and how being connected to others may alleviate, loneliness. Loneliness is known to negatively affect one’s health, social life, familial relationships, and feelings, and their effect on the elderly is described. We all yearn for social support, and the review examines what are the elderly’s expectations from their social support network. Expectations which will significantly affect their commitment to that network, and feeling fulfilled by it. The review concludes with a focus on successful aging and how they can control and minimize their loneliness and feelings of isolation.
IRONMAN® Hawaii is the fastest race course for age group triathletes (Preprint)
Authors: Knechtle Beat , Valero David , Villiger Elias , Thuany Mabliny , Nikolaidis Pantelis , Cuk Ivan , Andrade Marilia , Forte Pedro , Weiss Katja
Published: May 2023

BACKGROUND

The IRONMAN® triathlon is a popular multi-sport, where age group athletes often strive to qualify for the IRONMAN® World Championship in Hawaii. The aim of the present study was to investigate the location of the fastest IRONMAN® racecourses for age group triathletes. This knowledge will help IRONMAN® age group triathletes find the best racecourse, considering their strengths and weaknesses, to qualify.

OBJECTIVE

To determine the fastest IRONMAN® racecourse for age group triathletes using the machine learning XG Boost algorithm.

METHODS

We collected and analyzed 677,702 age group finishers' records from 228 countries participating in the IRONMAN® competitions held between 2002 and 2022 across 67 event locations. A predictive model was built with the race finish time as the predicted variable and the triathlete’s gender, age group, country of origin, and event location as predictors. The model was trained with 75% of the available data and was validated against the remaining 25%. Several model interpretability tools were used to explore how each predictor contributed to the model's predictive power, from which we intended to infer whether one or more predictors were more important than the others.

RESULTS

The XG Boost Regressor model analysis indicated that the IRONMAN® Hawaii course was the fastest racecourse and that male athletes aged 35 years and younger were the fastest. Most of the finishers were competing in IRONMAN® triathlons held in the USA, such as IRONMAN® Wisconsin, Florida, Lake Placid, Arizona, and Hawaii, where the IRONMAN® World Championship takes place. Still, the fastest average times were achieved in IRONMAN® Hawaii, Austria, Copenhagen, Brazil Florianopolis, and Barcelona. Most of the successful IRONMAN® finishers originated from the United States of America, followed by athletes from the United Kingdom, Canada, Australia, Germany, and France. The best mean IRONMAN® race times were achieved by athletes from Austria, Germany, Belgium, Switzerland, Finland, and Denmark.

CONCLUSIONS

Age group athletes who have better placements in faster events and intend to qualify for IRONMAN® Hawaii may participate in IRONMAN® Austria, Copenhagen, Brazil Florianopolis, and Barcelona in order to achieve a fast race time to qualify for the IRONMAN® World Championship in Hawaii.

CLINICALTRIAL

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Living in sheltered Accommodation
Authors: - Anon
Published: May 2023

None
Aplicación ultractiva de la caducidad minera del artículo 127 del Código de Minería de 1932
Authors: Mozó Moreno Sebastián
Published: May 2023

This work comments on a ruling of the Santiago Court of Appeals dated January 23th, 2019, confirmed by the Supreme Court in November 2020, which decided the expiration of a mining concession under the basis of the automatic expiration or ipso iure from the article 127 of the Mining Code of 1932. It is concluded that the Court makes an erroneus analysis when declaring the expiration of the mining concession, since it applies a repealed rule in an ultractively way without a judgment declaring forfeiture, reverses the burden of proof and it does not recognize the probative value of acts of authority.
¿Un mundo sin antibióticos? Conoce la resistencia antimicrobiana
Authors: Ortiz Brizuela Edgar , Ordinola Navarro Alberto , López Luis Bruno Ali
Published: May 2023

Los antibióticos son medicamentos utilizados desde hace mucho tiempo. Su descubrimiento ha permitido tratar enfermedades que hace algunas décadas eran consideradas mortales, con excelentes resultados, por lo que son un recurso invaluable. Sin embargo, en los últimos años se empieza a escuchar con mayor frecuencia el término “resistencia antimicrobiana”. La resistencia antimicrobiana es de interés para todo el público. Se ha estimado que, a nivel global, el uso indiscriminado de antibióticos podría ocasionar que en el año 2050 tengamos 300 millones de muertes prematuras por bacterias resistentes. En este documento describimos un poco de la historia de los antibióticos y el cómo se genera la resistencia a estas sustancias.
LA PALOMA ALA BLANCA (Zenaida asiatica), UN NUEVO REPORTE ESPECÍFICO EN LA DIETA DE Ctenosaura similis (SQUAMATA: IGUANIDAE)
Authors: Astorga-Acuña Juan de Dios , Mora José Manuel
Published: May 2023

El garrobo (Ctenosaura similis) se encuentra principalmente en ambientes xéricos en la vertiente del Pacífico de Mesoamérica. La especie ha sido considerada omnívora, con un cambio ontogenético en su dieta; los juveniles son insectívoros y los adultos son principalmente herbívoros. El garrobo consume diferentes tipos de materia vegetal y animal, sin embargo, hay pocos informes de eventos concretos de depredación. Aquí reportamos la depredación de la paloma ala blanca (Zenaida asiatica) por el garrobo en Costa Rica. Una paloma adulta fue capturada en el nido por un garrobo, y el único volantón del nido fue depredado por otro garrobo hembra cuando cayó al suelo después del evento de depredación. La paloma ala blanca ha incrementado su distribución y abundancia y explota principalmente hábitats abiertos donde anida incluso en infraestructuras de humanos, donde queda expuesta a depredadores que habitan principalmente en este tipo de hábitat como el garrobo. Discutimos el contexto de este evento de depredación y agregamos a la paloma ala blanca a una lista basada en la recopilación de presas reportadas como consumidas por el garrobo tanto en su área de distribución natural como en sitios donde ha sido introducido.
THE SPETACLED CAIMAN (Caiman crocodilus, CROCODYLIA, ALLIGATORIDAE) AS A PREDATOR OF THE AMAZON SAILFIN-CATFISH (Pterygoplichthys pardalis, SILURIFORMES, LORICARIDAE)
Authors: Souza Franciele Cristina de , Oda Fabrício Hiroiuki , Morais Alessandro Ribeiro de
Published: May 2023

We report an event of a Caiman crocodilus consuming the catfish Pterygoplichthys pardalis. A list of known prey items of C. crocodilus was also compiled from the literature, including known vertebrate and invertebrate items for this species. The predation event was observed at the margin of a lagoon in Reserva Florestal Adolpho Ducke, located in the municipality of Manaus, Amazonas state, Brazil, during a fieldwork study in 2020. The literature survey revealed 250 distinct prey items for this caiman, of which 150 are invertebrates (89 Insecta, 24 Crustacea, 14 Mollusca,10 Arachnida, 10 Myriapoda, 2 Annelida, and 1 Platyhelminthes) and 100 are vertebrates (53 fishes, 16 reptiles, 11 amphibians, 10 birds, and 10 mammals). Among fishes, only three Siluriformes have been taxonomically identified as C. crocodilus preys: Hoplosternum littorale, Clarias batrachus, and Ameiurus nebulosus. Therefore, the catfish P. pardalis represents a new prey specie for C. crocodilus. Our field observation and the presented literature review reinforce the view of C. crocodilus as a generalist predator, with fish as the most important vertebrate prey in the diet of this species.
AMPLIACIÓN DEL ÁREA DE DISTRIBUCIÓN DE LA RANA MINADORA, Hamptophryne boliviana (PARKER, 1927) (AMPHIBIA: ANURA: MICROHYLIDAE), EN EL NOROCCIDENTE AMAZÓNICO, COLOMBIA
Authors: Rojas Morales Julián Andrés , Cabrera Vargas Fabián Andrés
Published: May 2023

En Colombia habitan 17 de las 738 especies de ranas minadoras de la familia Microhylidae conocidas actualmente. Entre estas, Hamptophryne boliviana es una especie distribuida ampliamente en la cuenca Amazónica, pero con escasos registros en este país. En este trabajo presentamos dos nuevos registros, ampliando su área de distribución en más de 100 km lineales, al noroccidente de la localidad más cercana conocida (municipio de Solano, Caquetá, Colombia). Los nuevos registros se ubican en fragmentos de bosque húmedo tropical, ubicados en el piedemonte Andino-Amazónico (< 500 m s.n.m.) del departamento de Caquetá, en una de las áreas con mayor tasa de deforestación Colombia. Se discute la distribución geográfica de la especie en el noroccidente de la Amazonía.
REDATION ATTEMPTS OF THE GRAY FOX (Urocyon cinereoargenteus) AND THE NEOTROPICAL OTTER (Lontra longicaudis) BY THE CENTRAL AMERICAN BOA CONSTRICTOR (Boa imperator) IN THE NORTHERN PORTION OF THE SELVA LACANDONA, CHIAPAS, MEXICO
Authors: Melgar-Martínez Ana Iris , Tarano-González Rafael , García- Padilla Elí , Villalobos Juárez Ivan , Lavariega Mario C. , Lazcano-Villareal David
Published: May 2023

Predator-prey interactions in the wild are scarcely observed or photo documented. This kind of natural history information is vital to understanding trophic chains and the ecology of the species involved. We present relevant new information regarding the diet of the Mesoamerican Boa (Boa imperator) in the northern region of the Selva Lacandona in Chiapas, Mexico. We expect that this information will be beneficial for the understanding of trophic webs in this multicultural and biodiverse region from southern Mexico.
LOS REPTILES DE SINALOA: NUEVOS REGISTROS MUNICIPALES Y LISTADO DE ESPECIES RARAS
Authors: Aguirre Zazueta Mauro , Jacobo González José David , Castro Bastidas Héctor Alexis
Published: May 2023

El estado de Sinaloa en México es una región con escaso trabajo de campo en el estudio de la herpetofauna. Aquí presentamos cuatro nuevos registros municipales de Coniophanes lateritius, Mastigodryas cliftoni, Salvadora deserticola y Tantilla yaquia para el municipio de Cosalá. Además, proporcionamos un listado de especies raras con más de 50 años sin registros en Sinaloa. De las 122 especies de reptiles registradas en Sinaloa, 19 (15%) requieren verificación de su presencia en el estado para aclarar su estado de conservación. Para tener éxito en la búsqueda de estas especies el esfuerzo de campo por sí solo es insuficiente, por lo tanto, sugerimos que el trabajo de campo debería estar dirigido apropiadamente en consideración de la distribución geográfica de las especies y de la búsqueda en localidades históricas, preferencias del hábitat, la dinámica fenológica reproductiva, así como muestreos en los sitios inexplorados con hábitats similares que potencialmente pueden mantener poblaciones de dichas especies.
NUEVOS REGISTROS DE ANFIBIOS Y REPTILES PARA EL CENTRO DE MÉXICO
Authors: Villalobos Juárez Ivan , García-Padilla Elí
Published: May 2023

Documentamos formalmente nuevos registros estatales para tres entidades federativas del centro-norte de México, entre los que se encuentran la Lagartija caimán Gerrhonotus infernalis para Jalisco, la Serpiente ciega Virgotyphlops braminus para San Luis Potosí, así como la Rana arborícola mexicana Agalychnis dacnicolor para Zacatecas. Asimismo, reportamos las ampliaciones del rango de distribución de la Boa occidental Boa sigma y de la Lagartija de cola larga Sceloporus utiformis para el municipio de Jalpa; la culebra ciega Virgotyphlops braminus y la lagartija de collar Crotaphytus collaris para el municipio de Loreto, ambos municipios pertenecientes al estado de Zacatecas.
DEPREDACIÓN DE LA VÍBORA DE CASCABEL DEL PACÍFICO Crotalus helleri caliginis POR EL HALCÓN PEREGRINO Falco peregrinus EN LA ISLA CORONADO SUR, BAJA CALIFORNIA MÉXICO.
Authors: Villalobos Juárez Ivan , García-Padilla Elí , Sigala-Rodríguez José Jesús , Carrillo-Martínez Daniel Alexander
Published: May 2023

Registramos la depredación de la serpiente de cascabel Crotalus helleri caliginis, endémica de la Isla Coronado Sur, Baja California, basados en el hallazgo de restos óseos de dos serpientes en las egagrópilas del Halcón peregrino Falco peregrinus. Este registro representa la primera depredación confirmada para la serpiente isleña y amplía el conocimiento de la dieta del Halcón peregrino en la isla.
El derecho a un ambiente sano que vulnera a los animales domésticos en México
Authors: Baena Sánchez Teresa
Published: May 2023

A partir de mediados del siglo pasado la preocupación por un medio ambiente sano ha ido en incremento y ha hecho que la regulación ambiental sea analizada por los Estados a partir de sus Constituciones y leyes federales. Realizaré un análisis breve del artículo 4o. constitucional para reflexionar en qué estatus se encuentran los animales cuando se habla del derecho a un medio ambiente sano, ya que es en el medio ambiente donde nacen, crecen y se reproducen los animales y, en general, todos los seres vivos.