bluuebunny/crossref_metadata_2025 huggingface dataset:
Scoping the Role of LGBTQI+ Festivals in Regional Australia: A Local Community Perspective
Authors: Vorobjovas-Pinta Oscar , Pearce Joanna
Published: January 2024

Regional LGBTQI+ festivals and events are on the rise in Australia. They challenge the traditional perceptions of a regional destination that are often positioned and imagined as heteronormative, monoethnic, and monoindustrial. As the popularity of regional LGBTQI+ events
increases, there is a need to understand the local community’s perspectives on these events. As such, by focusing on the Broken Heel Festival, hosted in Broken Hill, a regional town in Australia, this research note scopes and initiates discussion around the broader understanding of how
regional LGBTQI+ events are transforming the traditional perceptions and values of and about the local community.
PENERAPAN E-COMMERCE PADA KARANG TARUNA KOMPLEK NUSA HIJAU
Authors: Anggreini Novita Lestari , Ekawati Nia , Tresnawati Shandy
Published: January 2024

The purpose of this community service is to increase community awareness of technology in the field of e-commerce and educate about how to utilize it through entrepreneurship. Nusa Hijau Complex has a Youth Organization which consists of junior high school and high school students. But even though the average Karang Taruna member is a school student, they always hold social activities such as sharing happiness with orphans, working together to clean up the complex environment, and holding studies on educational matters. The understanding of e-commerce in the community is certainly still limited, so from this the service team wants to provide enlightenment from the application of e-commerce itself. The target of the current service team is Karang Taruna Komplek Nusa Hijau, this service activity is well received by the service participants, so that the application of e-commerce can be implemented properly.
Development of an open-source solution to facilitate the use of one-button wearables in experience sampling designs
Authors: Volsa Selina , Lewetz David , Mlakic Vinka , Bertagnoli Chiara , Hochstöger Samantha , Rechl Martina , Sertic Hannah , Batinic Bernad , Stieger Stefan
Published: January 2024

The experience sampling method (ESM) allows for a high degree of ecological validity compared to laboratory research, at the cost of greater effort for participants. It would therefore benefit from implementations that reduce participant effort. In the present paper, we introduce a screenless wrist-worn one-button wearable as an unobtrusive measurement method that can be employed in ESM designs. We developed an open-source Android application to make this commercially available wearable easily configurable and usable. Over the course of six pilot studies, we explored the technical viability (e.g., battery life, reliability of inputs) of this wearable. We compared data quality between wearables and smartphones in a within-subjects design, exploring both the input options of using the number of button presses as a Likert scale, as well as using the angle of the device as a Physical Analogue Scale. Assessments of Extraversion made with either of these methods were highly correlated to comparable assessments made with comparable methods on a smartphone (i.e., Likert scale or a Visual Analogue Scale, respectively). Furthermore, in a preregistered ESM field experiment (N = 134, 4 weeks), we compared compliance to real-life event triggers between wearable devices and smartphones. We found higher numbers of logged events in the wearable group, indicating better adherence to the event-contingent scheduling. Overall, despite the device’s minimal capabilities and resulting limitations, one-button wearables can be beneficial for use in ESM designs.
What do we manipulate when reminding people of (not) having control? In search of construct validity
Authors: Bukowski Marcin , Potoczek Anna , Barzykowski Krystian , Lautenbacher Johannes , Inzlicht Michael
Published: January 2024

The construct of personal control is crucial for understanding a variety of human behaviors. Perceived lack of control affects performance and psychological well-being in diverse contexts – educational, organizational, clinical, and social. Thus, it is important to know to what extent we can rely on the established experimental manipulations of (lack of) control. In this article, we examine the construct validity of recall-based manipulations of control (or lack thereof). Using existing datasets (Study 1a and 1b: N = 627 and N = 454, respectively) we performed content-based analyses of control experiences induced by two different procedures (free recall and positive events recall). The results indicate low comparability between high and low control conditions in terms of the emotionality of a recalled event, the domain and sphere of control, amongst other differences. In an experimental study that included three types of recall-based control manipulations (Study 2: N = 506), we found that the conditions differed not only in emotionality but also in a generalized sense of control. This suggests that different aspects of personal control can be activated, and other constructs evoked, depending on the experimental procedure. We discuss potential sources of variability between control manipulation procedures and propose improvements in practices when using experimental manipulations of sense of control and other psychological constructs.
Integración de Tecnología y Educación Física en el Bachillerato General Unificado
Authors: Arias Escudero Álvaro Javier , Romero Granda Marjorie Fabiola , Murillo Noriega Daniel Eduardo , Guerra Arango Julio Andrés , Serrano Aguilar Jorge Luis
Published: January 2024

La propuesta de rediseño del bloque curricular en el bachillerato se basa en la evaluación del rendimiento físico estudiantil, con el fin de analizar su situación actual y proporcionarles las perspectivas y herramientas necesarias para llevar una vida activa, en línea con el perfil de egreso del bachiller ecuatoriano. La investigación comenzó con el análisis de datos derivados de pruebas físicas que abarcaron aspectos como velocidad, fuerza, frecuencia cardíaca, flexibilidad y coordinación motora.La muestra incluyó estudiantes de tercer año de bachillerato de instituciones fiscales y fiscomisionales, así como estudiantes del primer semestre de la Universidad Nacional de Chimborazo (UNACH). La evaluación se llevó a cabo mediante pruebas como velocidad 5 x 10 metros, test de Ruffier Dickson, lanzamiento de balón medicinal, abdominales por 30 segundos, salto horizontal, test de sit and reach y coordinación motora. Los resultados se registraron en una hoja de registro de datos, utilizando una tabla de baremos para jóvenes de 16 a 18 años en diversas pruebas físicas, clasificándolos en niveles del 1 al 10, donde 1 indica bajo rendimiento y 10 el rendimiento más alto. Se busca alcanzar un nivel promedio entre 5 y 6 en la tabla de baremos para cada estudiante.Los resultados revelaron deficiencias en el rendimiento en las pruebas, indicando carencias en el desarrollo de cada capacidad física. La propuesta busca que el bachiller incorpore aprendizajes relacionados con los movimientos corporales a través del ejercicio físico, con el objetivo de convertirse en un individuo activo tanto dentro como fuera del entorno educativo. Este enfoque fortalecerá el perfil de salida del bachiller, permitiéndole adquirir conocimientos prácticos sobre la actividad física.
Siringomielia. Generalidades, Evolución y Tratamiento
Authors: Montes Alcívar Franklin Saúl , Allaica Yubi Israel Frank , Moscoso Villegas Martin Alberto , Zurita Rodriguez Estevan Eduardo
Published: January 2024

Al día de hoy existe una extensa variedad de enfermedades y patologías que atacan al sistema nervioso afectando así la calidad de vida y el desarrollo de actividades comunes en quienes las padecen. Entre ellas destaca la Siringomielia, una enfermedad neurológica de progresión lenta que se caracteriza por la presencia de líquido cefalorraquídeo (LCR) en el interior de la médula espinal que origina la formación de un quiste llamado syrinx, este va creciendo lo que ocasiona la destrucción de la médula espinal en el área circunscrita lo que provoca síntomas como cefaleas, debilidad en los músculos de la espalda y las extremidades superiores e inferiores, además de la pérdida de la sensación de calor o frío. La finalidad de esta investigación es indagar en las generalidades de la siringomielia ya que al tratarse de una patología que afecta de manera directa a la médula espinal esta repercute negativamente en la vida de los pacientes. El estudio a continuación fue realizado con una metodología de tipo documental bibliográfico bajo control de una modalidad de revisión, ya que se trata de una recopilación de varias literaturas con relación al diagnóstico y tratamiento de la siringomielia como patología que afecta al sistema nervioso.
Network Pharmacology Study of Huangqi-Huangjing in the Treatment of Diabetic Nephropathy and Diabetic Cardiomyopathy
Authors: Lu Bohan , Huang Lei , Chen Xudong , Hong Jun , Jin Nake , Zhao Xuechen , Su Zhongmin , Rong Jiacheng
Published: January 2024

Objective: To systematically investigate the mechanism of Huangqi-Huangjing in the treatment of Diabetic Nephropathy (DN) and Diabetic Cardiomyopathy (DC) using network pharmacology and molecular docking analysis. To provide a theoretical basis for the development of new drugs for the treatment of DN and DC. Methods: The active ingredients and therapeutic targets of Huangqi-Huangjing, DN and DC were predicted and screened using TCMSP, GeneCards, DisGeNet and OMIM databases. Networks of active ingredients and targets were mapped using Cytoscape 3.8.2, Protein-Protein Interactions (PPI) were analyzed using the STRING database, and enrichment analysis of key targets was performed using “clusterProfiler” in R. Molecular docking of active ingredients and key targets was performed by Autodock vina. Results: A total of twenty-six active drug compounds, including diosgenin, formononetin, 7-O-methyl isomucronulatol, and 207 potential targets of Huangqi-Huangjing were obtained. PPI network analysis showed that targets such as AKT1, JUN, TP53, HSP90AA1 and RELA were associated with both huangqi-huangjing and DN-DC. GO and KEGG pathway analysis showed that most of these targets were involved in pathways such as Th17 cell differentiation, IL-17 signaling pathway, and AGE- RAGE signaling pathway in diabetic complications. Docking studies showed that diosgenin has ideal binding activity to TP53, RELA and AKT1. Conclusion: The active ingredients of Huangqi-Huangjing such as diosgenin may act on DN and DC through different targets such as TP53, RELA and AKT1, which can help to develop innovative drugs for effective treatment of DN and DC.
Antibiotics Sensitivity Against Staphylococcus aureus and Escherichia coli using Industrially Manufactured Sensitivity Disc
Authors: Khanam* Sabina
Published: January 2024

Staphylococcus aureus a gram-positive bacteria cause diseases through direct destruction and invasion of tissue by the production of toxins and Escherichia coli a gram-negative bacteria causes a variety of diseases. Testing of antibacterial susceptibility plays a major role in antibacterial treatment. Their are some factors which affects the results are quality, type and structure of a disks. This study was carried out with the aim to determine the Zone of inhibition of antibiotics against Staphylococcus aureus and Escherichia coli using industrially manufactured sensitivity disc. In positive test against Staphylococcus aureus the zone of inhibition was highest in antibiotic streptomycin (10mm/dm) and lowest in Amoxil (0mm/dm). In negative test against Staphylococcus aureus the zone of inhibition was highest in antibiotic Reflacine (10mm/dm) and lowest in Amplicin (2mm/dm). In positive test against Escherichia coli the zone of inhibition was highest in antibiotic Ciproflox (7mm/dm) and lowest in Amoxil (2mm/dm). There is no effect on antibiotic Norfloxacin, Erythromycin, Levofloxacin and Ampiclox. In negative test against Escherichia coli the zone of inhibition was highest in antibiotic Streptomycin (12mm/dm) and lowest in Tarivid (2mm/dm
The Value of Fetal Echocardiography for Early Detection of Congenital Heart Defects: A Report of our Experience in a Great Referral Heart Center in Iran
Authors: Sadeghian Hakimeh , Sadeghian Afsaneh , Semnani Farbod , Sheikhvatan Mehrdad , Abdolhossein Tabatabaie* Seyed
Published: January 2024

Background: Prenatal diagnosis of cardiac defects in fetus is of paramount importance to enable a better monitoring of heart defects and to allow planning a proper management. We reported our experience on fetal heart echocardiography in a great referral heart center in Iran with the approach to assessment of the diagnostic value of this tool for detecting Congenital Heart Diseases (CHDs). Methods: This retrospective cohort study included 234 pregnant women attended at a great referral heart center in Tehran, Iran between 2012 and 2016 for heart abnormalities screening. All women were evaluated by trans-abdominal fetal echocardiography from 12 weeks of gestation to term and after birth. Results: Fetal echocardiography showed different types of CHDs in 5.9%. CHDs detected in 9.9% of neonates by echocardiography after birth. The most common heart abnormalities detected was VSD in 4.3%. Considering echocardiography findings after birth as the reference, fetal echocardiography had a sensitivity of 92.8%, a specificity of 66.6%, a positive predictive value of 59.8%, a negative predictive value of 86.6%, and an accuracy of 84.1% for detection of heart defects. Conclusion: Fetal heart echocardiography is a sensitive tool for detection of CHDs, but its specificity is moderate.
Long-term Pseudo-Hypertriglyceridemia due to Novel GK Splice Variant c.894+2T>C
Authors: Nogueira Enrique , del Olmo Betariz , Lobo Concepcion , Gonzalez Cecilia , Llovet Patricia , Martinez Cristina
Published: January 2024

We here report on a case of a 46-year-old male under evaluation for persistent long-term (for more than 20 years) Hypertriglyceridemia (HTG) submitted to us for a genomic study based in an exome analysis of a mixed dyslipidemia, with Hypercholesterolemia (HC) and HTG (in multiple serum determinations, in recent years on Abbott Alinity Chemistry Analyzers), with unequal response to treatment (with statins for HC, and fibrates for HTG), with a progressive decrease in cholesterol values (now at almost optimal values of LDL cholesterol, around 125 mg/dL) while with no effect on TGs measurements (commonly around 600 mg/dL).
Diffuse Pollution Pathways are not the same for N and P Compounds
Authors: Arauzo* Mercedes , Valladolid Maria
Published: January 2024

Macronutrient fluxes from diffuse sources can affect aquatic ecosystems' health and drinking water quality. These are critical issues covered in the sixth gal of the 2030 Agenda for Sustainable Development to ensure the availability and sustainable management of water and sanitation for all [1]. To promote water quality protection, we need a better understanding of the hydrogeochemical, ecological and anthropogenic factors affecting diffuse pollution by Nitrogen (N) and Phosphorus (P) compounds generated by human activities.
Unraveling the Role of GPX4 Pathway in Ferroptosis and its Implications for Gastric Cancer Management
Authors: Zhao Mengran , Xu Junxuan , Zhu Shengquan , Li* Peng
Published: January 2024

Gastric Cancer (GC) presents a significant global health concern due to its high incidence and mortality rates. Despite advancements in medical treatments, drug resistance poses a major challenge in managing GC. Ferroptosis, a form of programmed cell death driven by iron-dependent lipid peroxidation, has emerged as a key contributor to treatment resistance in GC. The pivotal role of GPX4, a regulator of ferroptosis, has garnered considerable attention in cancer research. GPX4 synthesis and expression are subject to regulation at multiple levels, including transcription, translation, and posttranslational modifications. Ongoing development of pharmacological therapeutics targeting GPX4 aims to induce ferroptosis in cancer cells. This review provides an overview of the GPX4 pathway’s involvement in GC, shedding light on the implications of ferroptosis induction in combatting cancer resilience. These findings emphasize the therapeutic potential of GPX4 in managing gastric cancer and other malignancies, presenting novel opportunities to address the challenges of treatment resistance.
Colestasis intrahepática drepanocítica a propósito de un caso y revisión de la literatura
Authors: Calderón Yehey , Linares Kenia , Pichardo Mabel , Gomera García Lenin , Williams Eliza , Canela Marisol
Published: January 2024

La enfermedad de células falciformes (ECF) o anemia drepanocítica, es el trastorno hereditario más frecuente en los glóbulos rojos, y la enfermedad con más complicaciones en diferentes órganos, lo que provoca múltiples presentaciones de una misma enfermedad., se hace revisión literatura sobre ECF y colestasis intrahepática drepanocítica, y se describe un caso presentado en el Hospital General y de Especialidades Nuestra Señora de la Altagracia de Higüey Republica Dominicana en el año 2022. Es un varón de 24 años, con diagnóstico de ECF, que se complicó con una colestasis intrahepática drepanocítica muy severa que se manejó con hemodiálisis. El objetivo de publicar este caso es revisar la información respecto a la incidencia y la morbimortalidad de esta complicación, teniendo en cuenta que fue tratado por un equipo multidisciplinario usando la hemodiálisis como alternativa terapéutica.
Personal Comfort System Approach Associated with Fan Usage: A Review
Authors: Fakhrizal Akbar Ilmiawan  , Sheikh Ahmad Zaki  , Ahmad Faiz Mohammad  , Farah Liana Mohd Redzuan  , Mohd Radzi Ali  , Hom Bahadur Rijal
Published: January 2024

Due to the significant energy consumption of the air conditioner (AC), an alternative energy-saving method is required. To achieve this objective, the design of a building's heating, ventilation, and air conditioning (HVAC) systems must comply to the energy consumption criteria without sacrificing occupant comfort. In this instance, the personal comfort system (PCS) provides a promising means of meeting the demand. This paper aims to summarize the recent discoveries and research on personal comfort systems combined with fan usage. The PCS in conjunction with fan use, which is regarded as the most prevalent thermal adaptation behaviour, offers advantages in terms of conditioning the indoor thermal environment, modulating the person's interaction with the surrounding environmental control system, and reducing the excessive use of energy on HVAC.
Rasio keuangan, ukuran perusahaan, dan arus kas aktivitas operasi mempengaruhi return saham: Investigasi pada perusahaan sektor properti dan Real Estate, Tbk
Authors: Setijadi Narwastu Angelia , Indrawati Trisa
Published: January 2024

This study aims to test and analyze financial ratios consisting of liquidity ratios (current ratio), profitability ratios (return on assets), solvency ratios (debt to equity ratio), and activity ratios (total asset turnover), company size, and cash flow operating activities to stock returns. This type of research is quantitative research and the data used is secondary data. The selection of the sample used in this study is the purposive side. The number of samples obtained were 22 property and real estate companies with a total of 5 years of observation so that the total sample was 110 property and real estate companies. The data analysis technique used is multiple linear regression analysis with the help of the IBM SPSS program. The results of the study partially show that the current ratio, debt to equity ratio, total asset turnover, and company size have no significant effect on stock returns, while return on assets and cash flow from operating activities have a significant effect on stock returns. Simultaneously the current ratio, return on assets, debt to equity ratio, total asset turnover, company size and cash flow from operating activities have a significant effect on stock returns.
Analisis kinerja keuangan PT Kereta Api Indonesia (Persero) dengan metode DuPont system
Authors: Rabbani Rafid Azmi , Yasmin Annisa , Nurita Dea , Lestari Lela
Published: January 2024

Company financial performance is a benchmark to increase the value of a company. The existence of Covid-19 pandemic has caused the economy in Indonesia to decline which has had an impact on the financial performance of several companies, one of which is PT KAI (Persero). This research aims to determine the financial performance of PT KAI (Persero) in 2016-2021 as measured through financial statement analysis using the DuPont system. The research method used is descriptive quantitative. The data source used is secondary data, in the form of PT KAI (Persero) financial reports in the form of time series. The analytical technique used is the DuPont system. The results showed that the financial performance of PT KAI (Persero) in 2016-2021 was in a good position. Fluctuating NPM has a major impact on ROE, resulting in PT KAI (Persero) having to be vigilant and immediately innovate because their financial performance is not yet stable enough. The company expected to be able to optimize their financial management, especially in increasing sales volume accompanied by a high level of net profit and good asset management to create a good NPM and TATO for the company's ROI and ROE.
Pengaruh Citra Merek Dan Labelisasi Halal Terhadap Keputusan Pembelian Produk Pizza Hut Di Kota Pasuruan
Authors: Agustina Silvia
Published: January 2024

Abstrak : Permintaan konsumen saat ini terhadap makanan cepat saji (fast food) mengalami peningkatan. Restoran cepat saji menjadi salah satu perusahaan penyedia makanan yang diminati oleh konsumen di kota-kota besar, salah satunya restoran dengan merek asing. Namun hal tersebut berbanding terbalik dengan masyarakat yang ada di Kota Pasuruan, disana restoran dengan brand luar negeri terkadang mendapat respon yang kurang baik, dikarenakan munculnya skeptisme masyarakat yang mempertanyakan akan kehalalan suatu produk. Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh citra merek dan labelisasi halal terhadap keputusan pembelian produk pizza hut di kota pasuruan. Populasi yang digunakan masyarakat Kota Pasuruan yang pernah membeli produk pizza hut lebih dari 1x. Teknik yang digunakan purposive sampling dengan jumlah 60 responden. Berdasarkan hasil dari persamaan regresi linear berganda yakni Y= - 0.247+0.734X1+0.289X2 , Maka hasil penelitian ini menunjukkan bahwa citra merek dan labelisasi halal memiliki nilai Fhitung > F tabel yaitu 75.457 > 3.155 dan nilai sig. 0.000 < 0.05. Variabel citra merek memiliki nilai thitung > ttabel yaitu 11.744 > 2.002 dengan nilai sig 0.000 < 0.05 sedangkan labelisasi halal memiliki nilai thitung > ttabel yaitu 8.867 >  2.002 dengan nilai sig. 0.000 < 0.05. Berdasarkan hasil penelitian ini disimpulkan bahwa citra merek dan labelisasi halal berpengaruh secara signifikan terhadap keputusan pembelian.
THE ROLE OF THE SUFFIX -ISM IN THE WORD FORMATION OF NEOLOGISMS
IN THE JAPANESE LANGUAGE
Authors: Strelnikov I. A. , Bobrovskaya E. S.
Published: January 2024

One of the word-formation models of neologisms in the modern Japanese language are words with the affixal suffixation -ism. The article presents factors of the word formation process in comparison of three language systems in historical retrospect. Trends in the development of word formation in the Japanese language have been identified, reflecting the emerging needs of society in consolidating a new conceptual apparatus in the sphere of social relations, engineering and technology, science and culture. The analysis of the publication material is based on data from foreign authors with the aim of high-quality training of orientalist teachers and specialists in the field of oriental languages and culture.
MEASUREMENT OF ELECTRICAL CONDUCTIVITY AND RESISTIVITY OF CU-NB18% MICROCOMPOSITE CONDUCTOR AND ITS WELDED JOINT
Authors: Beinoras Paulius , Višniakov Nikolaj
Published: January 2024

Systems generating strong magnetic fields are widely used in modern fundamental and applied research as well as in the most innovative industrial processes. These devices generate magnetic fields that reach 5–100 T and the conductors are subjected to a huge Lorentz force, so the conductor material must be extremely strong (UTS ≥ 700 MPa) and have a good specific electrical conductivity (IACS ≥ 60%). Since traditional conductors such as copper, aluminum, gold, and silver cannot withstand such loads, microcomposite materials have been developed that are characterized by such high strength and good specific electrical conductivity. This paper reviews the specific electrical conductivity and specific electrical resistance characteristics of conductor and factors affecting them, methods of measuring these electrical characteristics as well as properties of Cu-Nb18% microcomposite conductor. This paper also describes the methodology for measuring the specific electrical conductivity and specific electrical resistance of the Cu-Nb18% microcomposite conductor solid and with welded joint (welded by using butt welding). The comparison of application possibilities of used methodologies and obtained characteristics was carried out.
Sensitivity of Polarization to Grain Shape. I. Convex Shapes
Authors: Draine B. T.
Published: January 2024

Aligned interstellar grains produce polarized extinction (observed at wavelengths from the far-ultraviolet to the mid-infrared) and polarized thermal emission (observed at far-infrared and submm wavelengths). The grains must be quite nonspherical, but the actual shapes are unknown. The relative efficacy for aligned grains to produce polarization at optical versus infrared wavelengths depends on particle shape. The discrete dipole approximation is used to calculate polarization cross sections for 20 different convex shapes, for wavelengths from 0.1 to 100 μm, and grain sizes a
eff from 0.05 to 0.3 μm. Spheroids, cylinders, square prisms, and triaxial ellipsoids are considered. Minimum aspect ratios required by the observed starlight polarization are determined. Some shapes can also be ruled out because they provide too little or too much polarization at far-infrared and submm wavelengths. The ratio of 10 μm polarization to integrated optical polarization is almost independent of grain shape, varying by only ±8% among the viable convex shapes; thus, at least for convex grains, uncertainties in grain shape cannot account for the discrepancy between predicted and observed 10 μm polarization toward Cyg OB2-12.
MAMMOTH-Subaru. V. Effects of Cosmic Variance on Lyα Luminosity Functions at z = 2.2–2.3
Authors: Ma Ke , Zhang Haibin , Cai Zheng , Liang Yongming , Kashikawa Nobunari , Li Mingyu , Wu Yunjing , Li Qiong , Fan Xiaohui , Johnson Sean D. , Ouchi Masami
Published: January 2024

Cosmic variance introduces significant uncertainties into galaxy number density properties when surveying the high-redshift Universe with a small volume. Such uncertainties produce the field-to-field variance σ

g
of galaxy numbers in observational astronomy, which significantly affects the luminosity function (LF) measurement of Lyα emitters (LAEs). For most previous Lyα LF studies, σ

g
is often adopted from predictions by cosmological simulations, but barely confirmed by observations. Measuring cosmic variance requires a huge sample over a large volume, exceeding the capabilities of most astronomical instruments. In this study, we demonstrate an observational approach for measuring the cosmic variance contribution for z ≈ 2.2 Lyα LFs. The LAE candidates are observed using the narrow band and broad band of the Subaru/Hyper Suprime-Cam in eight independent fields, making the total survey area ≃11.62 deg2 and a comoving volume of ≃8.71 × 106 Mpc3. We report a best-fit Schechter function with parameters α = −1.75 (fixed),

L

Ly
α

*

=

5.95

−
0.96

+
1.22

×

10

42

erg s−1, and

ϕ

Ly
α

*

=

5.26

−
1.27

+
1.65

× 10−4 Mpc−3 for the overall Lyα LFs. After clipping out the regions that may bias the cosmic variance measurements, we calculate σ

g
by sampling LAEs within multiple pointings on the field image. We investigate the relation between σ

g
and survey volume V, and fit a simple power-law

σ

g

=
k
×

V

10

5

Mpc

3

β

. We find best-fit values of

−

1.399

−
0.156

+
0.160

for β and

1.249

−
0.193

+
0.213

for k. We compare our measurements with predictions from simulations and find that the cosmic variance of LAEs is likely larger than that of general star-forming galaxies.
A Simultaneous Dual-frequency Scintillation Arc Survey of Six Bright Canonical Pulsars Using the Upgraded Giant Metrewave Radio Telescope
Authors: Turner Jacob E. , Joshi Bhal Chandra , McLaughlin Maura A. , Stinebring Daniel R.
Published: January 2024

We use the upgraded Giant Metrewave Radio Telescope (uGMRT) to measure scintillation arc properties in six bright canonical pulsars with simultaneous dual-frequency coverage. These observations, at frequencies from 300 to 750 MHz, allowed for detailed analysis of arc evolution across frequency and epoch. We perform more robust determinations of frequency dependence for arc curvature, scintillation bandwidth, and scintillation timescale, and comparison between arc curvature and pseudo-curvature than allowed by single-frequency-band-per-epoch measurements, which we find to agree with theory and previous literature. We find a strong correlation between arc asymmetry and arc curvature, which we have replicated using simulations, and attribute to a bias in the Hough transform approach to scintillation arc analysis. Possible evidence for an approximately week-long timescale over which a given scattering screen dominates signal propagation was found by tracking visible scintillation arcs in each epoch in PSR J1136+1551. The inclusion of a 155-minute observation allowed us to resolve the scale of scintillation variations on short timescales, which we find to be directly tied to the amount of interstellar medium sampled over the observation. Some of our pulsars showed either consistent or emerging asymmetries in arc curvature, indicating instances of refraction across their lines of sight. Significant features in various pulsars, such as multiple scintillation arcs in PSR J1136+1551 and flat arclets in PSR J1509+5531, that have been found in previous works, were also detected. The simultaneous multiple-band observing capability of the upgraded GMRT shows excellent promise for future pulsar scintillation work.
Growth of Massive Molecular Cloud Filament by Accretion Flows. I. Slow-shock Instability versus Ambipolar Diffusion
Authors: Abe Daisei , Inoue Tsuyoshi , Inutsuka Shu-ichiro
Published: January 2024

The Herschel Gould Belt Survey showed that stars form in dense filaments in nearby molecular clouds. Recent studies suggest that massive filaments are bound by the slow shocks caused by accretion flows onto the filaments. The slow shocks are known to be unstable to corrugation deformation of the shock front. Corrugation instability could convert the accretion flow's ram pressure into turbulent pressure that influences the width of the filament, which, according to theory, determines the self-gravitational fragmentation scale and core mass. In spite of its importance, the effect of slow-shock instability on star-forming filaments has not been investigated. In addition, the linear dispersion relation obtained from ideal magnetohydrodynamics (MHD) analysis shows that the most unstable wavelength of shock corrugation is infinitesimally small. In the scale of dense filaments, the effect of ambipolar diffusion can suppress the instability at small scales. This study investigates the influence of ambipolar diffusion on the instability of the slow shock. We perform two-dimensional MHD simulations to examine the linear growth of the slow-shock instability, considering the effect of ambipolar diffusion. The results demonstrate that the most unstable scale of slow-shock instability is approximately 5 times the length scale of ambipolar diffusion ℓ
AD calculated using post-shock variables, where ℓ
AD corresponds to the scale where the magnetic Reynolds number for ambipolar diffusivity is unity.
Investigating Period Variability Mechanisms in Eclipsing Binary Stars through Eclipsing Time Variation Analysis: A Case Study of TZ Bootis
Authors: Zervas Konstantinos , Christopoulou Panagiota-Eleftheria , Papageorgiou Athanasios
Published: January 2024

We present an effective strategy for extensive analysis of eclipsing time variations (ETVs) using modern and sophisticated optimization methods that comprise a set of tools to investigate period variability mechanisms in eclipsing binary stars such as the light-time effect, the Applegate mechanism, and mass transfer. We implement these methods for the first time assuming that the above mechanisms can act simultaneously in the puzzling W UMa–type binary star TZ Bootis by using archival and new TESS data spanning 75 yr and reexamining the up-to-date ETVs. Preliminary analysis of the TESS data revealed for the first time the presence of a second binary in agreement with previous spectroscopic data and astrometric results from Gaia DR3. We consider the most credible scenario for the ETV: two stellar circumbinary companions of minimum masses M
3 = 0.5 M
☉ and M
4 = 0.14 M
☉ in highly eccentric orbits e
3 = 0.70 and e
4 = 0.82 with periods P
3 = 38 yr and P
4 = 20 yr along with a 24 yr magnetic activity of the secondary component and a long-term period increase (dP/dt = 1.2 × 10−8 days yr−1), interpreted as a conservative mass transfer from the secondary to the primary component at a rate of dM
1/dt = 3.7 × 10−9 days yr−1. Further spectroscopic observations, analytical modeling of the second pair, and ETV analysis of both pairs are needed to investigate the quadruple nature of the system.
Spectroscopic Imaging of the Sun with MeerKAT: Opening a New Frontier in Solar Physics
Authors: Kansabanik Devojyoti , Mondal Surajit , Oberoi Divya , Chibueze James O. , Engelbrecht N. E. , Strauss R. D. , Kontar E. P. , Botha G. J. J. , Steyn P. J. , Nel Amoré E.
Published: January 2024

Solar radio emissions provide several unique diagnostics to estimate different physical parameters of the solar corona, which are otherwise simply inaccessible. However, imaging the highly dynamic solar coronal emissions spanning a large range of angular scales at radio wavelengths is extremely challenging. At gigahertz frequencies, MeerKAT radio telescope is possibly globally the best-suited instrument at present for providing high-fidelity spectroscopic snapshot solar images. Here, we present the first published spectroscopic images of the Sun made using the observations with MeerKAT in the 880–1670 MHz band. This work demonstrates the high fidelity of spectroscopic snapshot MeerKAT solar images through a comparison with simulated radio images at MeerKAT frequencies. The observed images show extremely good morphological similarities with the simulated images. Our analysis shows that below ∼900 MHz MeerKAT images can recover essentially the entire flux density from the large angular-scale solar disk. Not surprisingly, at higher frequencies, the missing flux density can be as large as ∼50%. However, it can potentially be estimated and corrected for. We believe once solar observation with MeerKAT is commissioned, it will enable a host of novel studies, open the door to a large unexplored phase space with significant discovery potential, and also pave the way for solar science with the upcoming Square Kilometre Array-Mid telescope, of which MeerKAT is a precursor.
JWST Imaging of Edge-on Protoplanetary Disks. II. Appearance of Edge-on Disks with a Tilted Inner Region: Case Study of IRAS04302+2247
Authors: Villenave Marion , Stapelfeldt Karl R. , Duchêne Gaspard , Ménard François , Wolff Schuyler G. , Perrin Marshall D. , Pinte Christophe , Tazaki Ryo , Padgett Deborah L.
Published: January 2024

We present James Webb Space Telescope imaging from 2 to 21 μm of the edge-on protoplanetary disk around the embedded young star IRAS04302+2247. The structure of the source shows two reflection nebulae separated by a dark lane. The source extent is dominated by the extended filamentary envelope at ∼4.4 μm and shorter wavelengths, transitioning at 7.7 μm and longer wavelengths to more compact lobes of scattered light from the disk itself. The dark lane thickness does not vary significantly with wavelength, which we interpret as an indication for intermediate-sized (∼10 μm) grains in the upper layers of the disk. Intriguingly, we find that the brightest nebula of IRAS40302 switches side between 12.8 and 21 μm. We explore the effect of a tilted inner region on the general appearance of edge-on disks. We find that radiative transfer models of a disk including a tilted inner region can reproduce an inversion in the brightest nebula. In addition, for specific orientations, the model predicts strong lateral asymmetries, which can occur for more than half possible viewing azimuths. A large number of edge-on protoplanetary disks observed in scattered light show such lateral asymmetries (15/20), which suggests that a large fraction of protoplanetary disks might host a tilted inner region. Stellar spots may also induce lateral asymmetries, which are expected to vary over a significantly shorter timescale. Variability studies of edge-on disks would allow us to test the dominant scenario for the origin of these asymmetries.
Comparative Analysis of Type III Radio Bursts and Solar Flares: Spatial Localization and Correlation with Solar Flare Intensity
Authors: Krupar Vratislav , Kruparova Oksana , Szabo Adam , Nemec Frantisek , Maksimovic Milan , Martinez Oliveros Juan Carlos , Lario David , Bonnin Xavier , Vecchio Antonio , Pulupa Marc , Bale Stuart D.
Published: January 2024

We present a comprehensive study of type III radio bursts and their association with solar flares of magnitude M1.0 and larger, as observed by four widely separated spacecraft (Parker Solar Probe, Solar Orbiter, STEREO-A, and Wind). Our main focus is the introduction and validation of two methods for localizing radio bursts using the available multispacecraft data. The first method utilizes intensity fitting with a circular Gaussian distribution, while the second method is based on the time arrival of radio bursts. We demonstrate the effectiveness of these methods through the analysis of a single type III burst event and compare their results with the traditional radio triangulation technique. Furthermore, we conduct a statistical study of 17 type III bursts associated with M- and X-class solar flares in years 2020–2022. Our findings suggest a possible correlation between solar flare intensities and longitudes, with east limb flares tending to be weaker than west limb flares. We also observe a systematic drift of radio burst longitudes toward the east, potentially explained by a poleward component of the local density gradient. Our results suggest a strong correlation between solar flare intensities and radio burst properties, enhancing our understanding of the relationship between solar flares and type III radio bursts.
Small-scale Cosmic-Ray Anisotropy Observed by the GRAPES-3 Experiment at TeV Energies
Authors: Chakraborty M. , Ahmad S. , Chandra A. , Dugad S. R. , Goswami U. D. , Gupta S. K. , Hariharan B. , Hayashi Y. , Jagadeesan P. , Jain A. , Jain P. , Kawakami S. , Koi T. , Kojima H. , Mahapatra S. , Mohanty P. K. , Moharana R. , Muraki Y. , Nakamura T. , Nayak P. K. , Nonaka T. , Oshima A. , Pant B. P. , Pattanaik D. , Paul S. , Pradhan G. S. , Rameez M. , Ramesh K. , Saha S. , Sahoo R. , Scaria R. , Shibata S. , Tabata T. , Takamaru H. , Tanaka K. , Varsi F. , Yamazaki K. , Zuberi M.
Published: January 2024

GRAPES-3 is a mid-altitude (2200 m) and near-equatorial (11.°4N) air shower array, overlapping in its field of view for cosmic-ray observations with experiments that are located in the Northern and Southern Hemispheres. We analyze a sample of 3.7 × 109 cosmic-ray events collected by the GRAPES-3 experiment between 2013 January 1 and 2016 December 31 with a median energy of ∼16 TeV for study of small-scale (<60°) angular-scale anisotropies. We observed two structures, labeled A and B, that deviate from the expected isotropic distribution of cosmic rays in a statistically significant manner. Structure A spans 50°–80° in R.A. and from −15° to 30° in decl. The relative excess observed in structure A is at the level of (6.5 ± 1.3) × 10−4 with a statistical significance of 6.8 standard deviations. Structure B is observed in the R.A. range 110°–140° and at decl. from −10° to 30°. The relative excess observed in this region is at the level of (4.9 ± 1.4) × 10−4 with a statistical significance of 4.7 standard deviations. These structures are consistent with those reported by Milagro, ARGO-YBJ, and HAWC. These observations could provide a better understanding of the sources of cosmic rays, their propagation, and the magnetic structures in our Galaxy.
Studying the Spheromak Rotation in Data-constrained Coronal Mass Ejection Modeling with EUHFORIA and Assessing Its Effect on the B

z
Prediction
Authors: Sarkar Ranadeep , Pomoell Jens , Kilpua Emilia , Asvestari Eleanna , Wijsen Nicolas , Maharana Anwesha , Poedts Stefaan
Published: January 2024

A key challenge in space weather forecasting is accurately predicting the magnetic field topology of interplanetary coronal mass ejections (ICMEs), specifically the north–south magnetic field component (B

z
) for Earth-directed CMEs. Heliospheric MHD models typically use spheromaks to represent the magnetic structure of CMEs. However, when inserted into the ambient interplanetary magnetic field, spheromaks can experience a phenomenon reminiscent of the condition known as the “spheromak tilting instability,” causing its magnetic axis to rotate. From the perspective of space weather forecasting, it is crucial to understand the effect of this rotation on predicting B

z
at 1 au while implementing the spheromak model for realistic event studies. In this work, we study this by modeling a CME event on 2013 April 11 using the European Heliospheric Forecasting Information Asset. Our results show that a significant spheromak rotation up to 90° has occurred by the time it reaches 1 au, while the majority of this rotation occurs below 0.3 au. This total rotation resulted in poor predicted magnetic field topology of the ICME at 1 au. To address this issue, we further investigated the influence of spheromak density on mitigating rotation. The results show that the spheromak rotation is less for higher densities. Importantly, we observe a substantial reduction in the uncertainties associated with predicting B

z
when there is minimal spheromak rotation. Therefore, we conclude that spheromak rotation adversely affects B

z
prediction in the analyzed event, emphasizing the need for caution when employing spheromaks in global MHD models for space weather forecasting.
An Efficient Algorithm for Astrochemical Systems Using Stoichiometry Matrices
Authors: Motoyama Kazutaka , Krasnopolsky Ruben , Shang Hsien , Aida Kento , Sakane Eisaku
Published: January 2024

Astrochemical simulations are a powerful tool for revealing chemical evolution in the interstellar medium. Astrochemical calculations require efficient processing of large matrices for the chemical networks. The large chemical reaction networks often present bottlenecks for computation because of time derivatives of chemical abundances. We propose an efficient algorithm using a stoichiometry matrix approach in which this time-consuming part is expressed as a loop, unlike the algorithm used in previous studies. Since stoichiometry matrices are sparse in general, the performances of simulations with our algorithm depend on which sparse-matrix storage format is used. We conducted a performance comparison experiment using the common storage formats, including the coordinate format, the compressed column storage format, the compressed row storage (CRS) format, and the sliced ELLPACK format. Experimental results showed that the simulations with the CRS format are the most suitable for astrochemical simulations and about a factor of 2 faster than those with the algorithm used in previous studies. In addition, our algorithm significantly reduces not only the computation time but also the compilation time. We also explore the beneficial effects of parallelization and sparse-matrix reordering in these algorithms.
Bug Found in Gaia query_object Functions of Astroquery’s Python Package
Authors: Sweeney David , Krone-Martins Alberto
Published: January 2024

This research note addresses a bug in the Gaia functionality of the astroquery Python package. The bug, which results in sources in the Gaia catalog not being returned, affects the Gaia.query_object() and Gaia.query_object_async() functions. These rely on the deprecated ADQL BOX function if width or height are specified. These functions are used in published research and as such the bug could affect peer-reviewed results. We advise any researchers using these functions to instead use the Gaia.cone_search() counterparts to these functions or the Gaia.launch_job() functions. The Gaia helpdesk have been contacted and have confirmed the behavior and may update the astroquery documentation in the coming months.
Bioverse: The Habitable Zone Inner Edge Discontinuity as an Imprint of Runaway Greenhouse Climates on Exoplanet Demographics
Authors: Schlecker Martin , Apai Dániel , Lichtenberg Tim , Bergsten Galen , Salvador Arnaud , Hardegree-Ullman Kevin K.
Published: January 2024

Long-term magma ocean phases on rocky exoplanets orbiting closer to their star than the runaway greenhouse threshold—the inner edge of the classical habitable zone—may offer insights into the physical and chemical processes that distinguish potentially habitable worlds from others. The thermal stratification of runaway planets is expected to significantly inflate their atmospheres, potentially providing observational access to the runaway greenhouse transition in the form of a habitable zone inner edge discontinuity in radius–density space. Here, we use Bioverse, a statistical framework combining contextual information from the overall planet population with a survey simulator, to assess the ability of ground- and space-based telescopes to test this hypothesis. We find that the demographic imprint of the runaway greenhouse transition is likely detectable with high-precision transit photometry for sample sizes ≳100 planets if at least ∼10% of those orbiting closer than the habitable zone inner edge harbor runaway climates. Our survey simulations suggest that, in the near future, ESA’s PLATO mission will be the most promising survey to probe the habitable zone inner edge discontinuity. We determine the survey strategies that maximize the diagnostic power of the obtained data and identify as key mission design drivers: (1) a follow-up campaign of planetary mass measurements and (2) the fraction of low-mass stars in the target sample. Observational constraints on the runaway greenhouse transition will provide crucial insights into the distribution of atmospheric volatiles among rocky exoplanets, which may help to identify the nearest potentially habitable worlds.