bluuebunny/crossref_metadata_2025 huggingface dataset:
La Politica Ambiental como Factor para Determinar el uso Adecuado de los Residuos Solidos
Authors: Solís Yépez Manuel Vicente , Zamalloa Mora. Zulemi
Published: July 2023

El constante aumento de la población a nivel mundial y las diversas actividades humanas, vienen generando un constante deterioro del mediante ambiente, lo cual se produce como consecuencia de los desechos que se producen por las actividades que deterioran considerablemente los ecosistemas existentes. Es así que, muchas organizaciones a nivel mundial, manifiestan que la degradación ambiental constituye una amenaza que engloba a todos los ciudadanos, La política ambiental en los municipios son las que se promueven con el propósito de regular y fomentar con ello la inversión pública fomentando para ellos los servicios ecosistémicos, proponiendo igualmente su metódica priorización con la intención de evidenciar la problemática ambiental en economía, la gobernabilidad y la visión de las municipalidades, la cual debe responder a las perspectivas ciudadanas, quienes a través de movimientos ciudadanos, quienes se encuentran dispuestos a demandar a los políticos a través de los medios de comunicación, que las políticas ambientales sean incluidas dentro de los planes de gobierno así como también en los debates electorales, de forma prioritaria, explicita y argumentada; solo así será mucho más fácil para los ciudadanos asimilar la importancia de una excelente gestión ambiental en los municipios, la cual merece nuestro país, puesto que es uno de los más diversos en recursos naturales en la orbe. El objetivo de la presente investigación es sistematizar las experiencias y evidencias de estudios y publicaciones respecto a las políticas ambientales y gestión de residuos sólidos en las municipalidades y conocer dentro de esto la “palabra clave de búsqueda” La metodología seleccionada para un mejor trato y selección de las investigaciones seleccionadas se utilizó la metodología PRISMA, definiendo los motores de búsqueda, la palabra clave de búsqueda, el idioma (español), así como la región donde fueron realizadas las investigaciones, lo cual nos lleva a tener 22 investigaciones útiles para esta.
Proyecto COIL: La práctica docente desde la interculturalidad
Authors: Gallego Hurtado Andrés Felipe , Meneses Castañeda María Érica , Cortes Fuentes Liliana
Published: July 2023

En la era de la Inteligencia Artifical los profesionales de la educación deben estar abiertos a los cambios generados por la globalización, es así como la interculturalidad desempeña un papel fundamental en la sociedad actual, donde la diversidad cultural y étnica es cada vez más evidente en los diferentes entornos de aprendizaje. En este contexto, las prácticas docentes juegan un papel crucial al abordar la importancia de la interculturalidad en el entorno educativo. Los docentes tienen la responsabilidad de crear ambientes de aprendizaje, innovadores, inclusivos, respetuosos y retadores que valoren y celebren las diferencias culturales de los estudiantes. Al fomentar la interculturalidad en las aulas, los docentes no solo promueven el respeto y la tolerancia, sino que también enriquecen el aprendizaje al incorporar perspectivas diversas y experiencias únicas. En linea a lo anterior, durante el año 2023 la Universidad del Noreste (México) y la Corporación Universitaria Minuto de Dios (Colombia), desarrollaron el proyecto colaborativo “La práctica educativa desde la interculturalidad” a partir de la metodología (COIL) Aprendizaje Colaborativo Internacional en línea (COIL), que permitió el desarrollo de habilidades blandas y competencias en los futuros profesionales de la educación mediadas por las TIC. Se planteó como objetivo general fomentar el desarrollo de competencias y habilidades en los profesionales en formación desde el COIL (Collaborative Online International Learning), promoviendo la interculturalidad y el analisis de los fenomenos sociales desde diferentes contextos. Desde el aspecto metodológico, la muestra es (n=43) que corresponde a los estudiantes de la Licenciatura en Educación Infantil de la Corporación Universitaria Minuto de Dios y Licenciatura en Educación Preescolar de la  Universidad del Noreste. Se aplica un método de investigación cualitativa, desde un tipo de investigación descriptiva, que permitio explicar y describir el desarrollo de habilidades por medio de dos instrumentos de recolección de datos: 1) entrevista y 2) encuesta.
Proponer Diseñar un Programa de Habilidades Sociales para el Fortalecimiento de la Convivencia Educativa en una Institución Educativa de una Ciudad Emergente
Authors: Limonchi Falen Ernesto Wenceslao , Abad Bautista. Leonor , Torres Linares Claudia Amparo , Limonchi Abad Enzo Vladirostov Wenceslao , Limonchi Abad Lileya Olenka
Published: July 2023

El presente trabajo de investigación tiene como objetivo general, Proponer diseñar un programa de habilidades sociales para el fortalecimiento de la convivencia educativa en una Institución Educativa de una ciudda emergente. La presente investigación es de tipo descriptiva proyectiva con un diseño no experimental, con enfoque cuantitativo que se realizó en una población de 117 estudiantes de en una Institución Educativa, teniendo como variable independiente, propuesta de un programa de habilidades sociales y variable dependiente, convivencia educativa. Para ellos se empleó la técnica de encuesta con la aplicación de un cuestionario como instrumento de recolección de datos. Asimismo, el dato de la variable en estudio fue recolectado, luego procesado y analizado, los resultados obtenidos de la muestra de estudiantes de en una Institución Educativa de una ciudad emergente, el nivel de la variable Convivencia Educativa se encuentra en la categoría Regular con un 64,10%, seguido de la categoría Bajo con un 24,79% y por último en la categoría Alto con un 11,11%. Se puede concluir que la variable dependiente como es la convivencia educativa necesita ser fortalecida, por tal razón se elaboró y se propuso el diseñar un programa de habilidades sociales.
Empoderamiento y Motivación de los Docentes de una Institución Educativa de Chiclayo, Año 2022
Authors: Limonchi Abad Enzo Vladirostov Wenceslao , Limonchi Falen Ernesto Wenceslao , Abad Bautista. Leonor , Malqui Calla Gladys Rocio , Torres Linares Claudia Amparo
Published: July 2023

La presente investigación denominada “Empoderamiento y motivación de los docentes de una Institución Educativa de Chiclayo, su propósito principal fue determinar la relación entre empoderamiento y motivación de los docentes de una institución educativa de Chiclayo, año 2022. La metodología que se aplicó en la investigación es de enfoque cuantitativo, de tipo básica, donde el nivel de investigación del estudio fue descriptivo correlacional y se basó en un diseño no experimental de corte transversal. Para recolectar la información fue utilizada la técnica de la encuesta, apoyándose de dos instrumentos ya aplicados, pero fueron nuevamente validados por expertos y con altos niveles de confiabilidad, los cuales fueron aplicados a una muestra de 70 encuestados para la recolección de datos. Teniendo como resultado una correlación de directa y positiva de ,842; entre la variable empoderamiento y la variable motivación, y significativa porque el p=0,00 siendo menor que 0,05. Llegando a la conclusión de una correlación alta entre empoderamiento y la motivación con un 0,842; donde podríamos afirmar que a mayor empoderamiento de los docentes mayor motivación de los docentes de una institución educativa de Chiclayo, año 2022.
Análisis de la aplicación de metodología DMAIC en procesos de producción de una empresa de alimento
Authors: Calla Huayapa Maxgabriel Alexis , Maldonado Mamani Ricardo Aníbal , Rodríguez San Román Carlos Manuel , Farfán Casapino Juan Wilbert , Quispe Bellido Nora Haydee
Published: July 2023

La presente investigación trata del análisis de los resultados de la aplicación de la metodología DMAIC en una empresa de alimentos, a fin de conocer el procedimiento de aplicación de esta alternativa, el estudio ayudar a identificar los principales problemas referente a la calidad no deseada en la entrega de productos. La metodología empleada se basa en el enfoque cuantitativo, a nivel descriptivo del problema y de los resultados. La población objeto de análisis son las unidades de producción, que son productos de 250 gramos, de los cuales se aplica una muestra para su pesado, esto para ver el control de los procesos. Con respecto a los resultados se ha tenido índices de 0.37 para la capacidad de proceso a nivel general y con la aplicación de la metodología DMAIC de ha logrado un ligero incremento a 1.07, sin embargo, se espera, con los posteriores análisis lograr un índice de la capacidad de proceso a 1.33, que es el promedio de calidad y control de los procesos. Como conclusiones se tiene que la metodología DMAIC, permite incrementar el control sobre los procesos, ya que, permite la identificación de las falencias en las actividades, procesos y tareas, permite establecer estrategias y acciones de mejora.
¿Inclusión, Reinserción o Resocialización? Generando Oportunidades bajo un modelo de Gestión Empresarial
Authors: Zapata Carnaqué Esperanza Marlene
Published: July 2023

¿Inclusión, Reinserción o Resocialización? Generando Oportunidades bajo un modelo de Gestión Empresarial
Program Tahfidzul Qur’an TPQ Al-Ikhlas Gunungan Dawarblandong Mojokerto
Authors: Yana Eka Endar Sari  , Nanang Abdillah
Published: July 2023

This study aims to: 1) Know the implementation of the Qur'an tahfidz program at TPQ Al-Ikhlas Gunungan Dawarblandong Mojokerto. 2) Knowing the obstacles to implementing the Qur'an tahfidz program at TPQ Al-Ikhlas Gunungan Dawarblandong. The type of research used in this study is a descriptive qualitative approach and the type of field research using the case study method. The results of this study are 1) In the implementation of the tahfidzul Qur'an program, there are 3 stages, namely the first planning. At the planning stage, the clerics prepare rote planning according to the predetermined curriculum. Then the implementation stage, the tahfidzul Qur'an program is carried out every day for private recitals. The last is the evaluation stage, with the tahfidzul Qur'an program making students more diligent in reading the Koran and reading the Koran. 2) The obstacles experienced when implementing the tahfidzul Qur'an program were that some students still had difficulty memorizing.
Implementasi Reward Dan Punishment Dalam Membentuk Kedisiplinan Sholat Dhuhur Berjamaah
Authors: Novika wahyu Hatutik  , Pristiwiyanto
Published: July 2023

The purpose of this study was to find out: 1) the process of implementing reward and punishment in forming the discipline of congregational midday prayers at SMA Negeri 1 Kedamean Gresik. 2) the results of the process of implementing reward and punishment in forming the discipline of praying dhuhr in congregation at SMA Negeri 1 Kedamean Gresik. Research conducted by the author using a qualitative descriptive method of field research using the case study method. The results of this study are 1) The process of implementing reward and punishment to be able to discipline students in congregational noon prayers at SMA Negeri 1 Kedamean Gresik is quite good. 2) By holding the Dhuhr prayer in congregation at SMA Negeri 1 Kedamean Gresik, it is hoped that all students can understand and have awareness of the obligation to pray, especially praying in congregation.
Program Unggulan Tahfidz al-Quran Madrasah Ibtidaiyah Miftahul Ulum Driyorejo Berbasis Metode Talaqqi
Authors: Umul Hazizah  , Muhammad Mahfud
Published: July 2023

The purpose of this study was to describe the implementation of the flagship program of Tahfidz al-Quran Madrasah Ibtidaiyah Miftahul Ulum Driyorejo based on the talaqqi method. The method used in this study is a descriptive method with a qualitative approach. Data collection techniques used are interview, observation, and documentation techniques. The data sources in this study consisted of four primary data sources and four secondary data sources. The results showed that Madrasah Ibtidaiyah Miftahul Ulum Driyorejo had successfully implemented the tahfidz al-Quran flagship program based on the talaqqi method. This success can be seen from the mentoring process that is in accordance with the syntax of the talaqqi method. Even the mentors carry out various methods of mentoring. During the mentoring process the participants also showed a change in character for the better. they become more patient, responsible, and work hard. The impact of this excellent program was also felt by the school by winning various competitions related to the Koran, both tahfidz competitions, tartil competitions, and al-Quran syarh competitions.

ABSTRAK

Tujuan penelitian ini adalah untuk mendeskripsikan pelaksanaan program unggulan Tahfidz al-Quran Madrasah Ibtidaiyah Miftahul Ulum Driyorejo berbasis metode talaqqi. Metode yang digunakan dalam penelitian ini adalah metode deskriptif dengan pendekatan kualitatif. Teknik pengumpulan data yang digunakan adalah teknik wawancara, observasi, dan dokumentasi. Sumber data dalam penelitian terdiri terdiri dari empat orang sumber data primer dan empat orang sumber data sekunder. Hasil penelitian menunjukkan bahwa Madrasah Ibtidaiyah Miftahul Ulum Driyorejo telah berhasil mengimplementasikan program unggulan tahfidz al-Quran berbasis metode talaqqi. Keberhasilan ini dapat diketahui dari proses pembimbingan yang sudah sesuai dengan sintaks metode talaqqi. Bahkan para pembimbing melakukan berbagai variasi metode dalam pembimbingan. Selama proses pembimbingan para peserta juga menunjukan perubahan karakter yang lebih baik. mereka menjadi lebih sabar, bertangung jawab, dan bekerja keras. Dampak dari program unggulam ini juga dirasakan sekolah dengan menjuarai berbagai lomba yang berkaitan dengan al-Quran baik lomba tahfidz, lomba tartil, maupun lomba syarh al-Quran.
Edukasi Moralitas Anak: Kajian Atas QS. Luqman Ayat 12-19 Perspektif Tafsir Al-Misbah
Authors: Khoirul Muthrofin
Published: July 2023

Education is a humanizing process. This concept indicates that there is no education if morality is fragile. This article aims to analyze the narrative of surah Luqman verses 12-19, which contains essential themes in moral education for children. Through a literature study, data were obtained by searching written documents based on the text of the commentary of al-Misbah by M. Quraish Shihab. As for data analysis, the researcher used Spradley's notion of componential-taxonomy analysis to make finding meaningful and relevant themes easier. The results of this study found that the concept of moral education in surah Luqman contains content about monotheism, devotion to both parents, and calls for doing various virtues while trying to prevent evil. This study also found that in the text of surah Luqman, there are at least three main points of moral education: spiritual morals, individual morals, and social morals. This research contributes to a more contextual interpretation of educational discourse on children facing social realities in their future lives. At the same time, the concept of amar ma'ruf is education-oriented toward harmony, while nahi munkar is an educational effort oriented towards efforts to avoid communal conflict.
PELAKSANAAN GERAKAN LITERASI BAC PELAKSANAAN GERAKAN LITERASI BACA- TULIS DISEKOLAH DASAR NEGERI 022 MUARA MAHAT BARU
Authors: Indra Deswita
Published: July 2023

This study aims to see what literacy programs are implemented in elementary schools. Schools and teachers foster literacy through the GLS (School Literacy Movement) program. This study aims to see the extent to which literacy literacy programs are implemented in elementary schools. This type of research is a qualitative research with a descriptive approach. The instruments used in this study were interview guides, observations, and documentation. Interviews were conducted with class 1 homeroom teachers where this research was conducted at SDN 022 Muara Mahat Baru. The results of the research show that the program implemented at this school is (1) reading for fifteen minutes (2) reading corner (3) reading in the library or the teacher bringing a reading basket to class which can be done depending on when the teacher applies it. And in implementing literacy programs we need to carry out three stages, namely habituation, development, and learning.
Experimental Investigation of Direct Solar Photovoltaics that Drives Absorption Refrigeration System
Authors: Jawad Khudhur  , Abdulrazzak Akroot  , Ahmed Al-Samari
Published: July 2023

Renewable energy used for refrigeration applications has become essential very recently due to the fossil fuel crisis and the global warming problem. Moreover, using photovoltaic PV to generate electricity than using inverters and energy storage represents a high-cost process. This study aims to investigate the opportunity of using PV output directly to operate a refrigeration system. The absorption refrigeration system uses heat as an energy source for the generator that drives the system. Moreover, the absorption refrigeration system doesn't have a compressor but a generator. As a result, the novel aspect of this study is the use of PV electricity's DC output to power the heater that provides the needed heat for the generator without the use of an inverter that provides AC electricity. The essential very difference here is that the compressor needs a consistent and steady electric supply. However, using DC electricity for heating is not very restricted if the voltage fluctuates a bit. A 580 W PV was used to power a refrigerator with a capacity of 70 liters. During several tests, the freezer of the fridge reached -26 C and the cabin temperature was around 10 C. This finding was similar to the performance of this fridge on a conventional heater.
Kết quả phẫu thuật cắt phần xa dạ dày nội soi hoàn toàn, phục hồi lưu thông tiêu hóa kiểu Finsterer điều trị ung thư dạ dày
Authors: Lương Cương
Published: July 2023

TÓM TẮT

Mục tiêu: Đánh giá kết quả sớm của phẫu thuật cắt phần xa dạ dày nội soi hoàn toàn, phục hồi lưu thông tiêu hóa theo kiểu Finterer tại Bệnh viện Trung ương Quân đội 108.

Đối tượng, pháp nghiên: Nghiên cứu tiến cứu. Gồm 108 trường hợp ung thư dạ dày được phẫu thuật cắt phần xa dạ dày nội soi hoàn toàn, phục hồi lưu thông tiêu hóa theo kiểu Finterer, tại Bệnh viện Trung ương Quân đội 108 từ 01/2019 đến 11/2020.

Kết quả: Tuổi trung bình là 59,49 ± 12,10 (26 - 86 tuổi); BMI trung bình 20,96 ± 2,31. Giai đoạn bệnh: giai đoạn IA (33,3%); giai đoạn IB (13,0%); giai đoạn IIA (11,1%); giai đoạn IIB (16,7%); giai đoạn IIIA (15,7%); giai đoạn IIIB (9,3%); giai đoạn IIIC (0,9%). Số hạch vét được trung bình: 27,15 ± 10,39 hạch. Thời gian phẫu thuật trung bình: 167,64 ± 42,99 phút; thời gian trung tiện trung bình: 3,38 ± 1,25 ngày; thời gian nằm viện trung bình: 8,68 ± 4,12 ngày. Biến chứng sớm sau phẫu thuật 6 (5,6%) trường hợp, trong đó: rò tiêu hóa 02 (1,9%); tắc ruột sớm 04 (3,7%); không có trường hợp nào tử vong sau sau phẫu thuật. Biến chứng muộn 04 (3,7%) trường hợp trong đó: thoát vị nội 02 (1,9%); rò dạ dày - đại tràng 01 (0,9%); tắc ruột do bã thức ăn 01 (0,9%).

Kết luận: Phẫu thuật cắt phần xa dạ dày nội soi hoàn toàn, phục hồi lưu thông tiêu hóa theo kiểu Finsterer có thể thực hiện an toàn và hiệu quả trong điều trị ung thư dạ dày.

ABSTRACT

RESULTS OF TOTALLY LAPAROSCOPIC DISTALGASTRECTOMY, FINSTERER - STYLE RESTORATION OF GASTROINTESTINAL CIRCULATION IN GASTRIC CANCER PATIENTS

Objective: To evaluate of early results of totally laparoscopic distal gastrectomy, Finterer - style restoration of gastrointestinal circulation at 108 Military Central Hospital.

Methods: This is a prospective and descriptive study. For this study 108 cases of gastric cancer diagnosed and totally laparoscopic distal gastrectomy, Finterer - style restoration of gastrointestinal circulation, at 108 Military Central Hospital from January 2019 to November 2020

Results: The mean age was 59.49 ± 12.10 (26 - 86 years old); Mean BMI was 20,96 ± 2.31. Disease stage: stage IA (33.3%); stage IB (13.0%); stage IIA (11.1%); stage IIB (16.7%); stage IIIA (15.7%); stage IIIB (9.3%); stage IIIC (0.9%). Number of haversted lymph nodes in average was 27.15 ± 10.39 nodes. Mean operative time was 167.64 ± 42.99 minutes. Mean time to first flatus was 3.38 ± 1.25 days. Mean postoperative hospital stay was 8.68 ± 4.12 days. Early postoperative complication 04 (5,6 %) cases including: 02 (1.9%) gastroenteric fistula, 04 (3.7%) cases of intestinal obstruction and none of death. Late complications 04 (3.7%) cases in which: 02 (1.9%) internal hernia, 01 (0.9%) gastro - colic fistula, 01 (0.9%) intestinal obstruction due to food residue.

Conclusion: Totally laparoscopic distal gastrectomy, Finsterer - style restoration of gastrointestinal circulation can be performed safely and effectively in the treatment of gastric cancer.
Criterios para el manejo del sombrío en sistemas agroforestales con café
Authors: León-Burgos Andrés Felipe , Rendón José Raúl , Jaramillo-Jiménez Alexander , Salazar Hugo Mauricio
Published: July 2023

Este Avance Técnico tiene como finalidad: resaltar la importancia de la regulación del sombrío y su efecto sobre la producción de café; y dar a conocer de manera detallada, el proceso de planificación del mantenimiento de los árboles de sombrío, con alcance al cumplimiento de los requisitos legales que hoy el caficultor debe considerar al momento de realizar el manejo de los sistemas agroforestales con café en Colombia.
A Pentecostal Reflection on Christianity and Extremism: Christianity and Book Burnings in the Late Antiquity
Authors: Agyapong Kwasi Atta
Published: July 2023

This historiographical research sought to cognize why religious extremism has thrived globally through an enquiry into Christian book burnings in the late antiquities. The study posited that the ritual of book burning is a form of oppression and persecution exerted by intolerant religious fundamentalists in their pursuit to shape reading habits, exhume idolatry, and magic, and censure philosophical ideologies that challenge a religious belief through prohibition, control, and sanctions. The discussion established that Book burnings in the twenty-first century are religious radicalism and immoderation skewed towards a myopic dimension. Christian Book burnings throughout four historical periods were graphed to deduce the implications of the ritual in the historic-socio cultural setting. The study through historical, philosophical and critical analysis of the ritual attempted to demystify religious opinions which levy sanctions on others who have deviating ideas. The study acclaimed that the use of violence to drive a religious opinion in any context must be despised. The philosophical supposition of this study was founded on these principles: If God is indeed peaceful as His followers uphold, then he will act peaceably and fairly by deterring his devotees from brutishness purportedly intended to censure, chastise and obliterate nonbelievers and their belongings: Nonetheless, if some religious group uses violence to propel their religious impulses, it is barefaced that, they have lost touch with the God of peace, or have malevolently ignored the values of the God of peace. The study contributes to knowledge by probing into a primordial Christian ritual that is detrimental to the peace and sustainability desired in the twenty-first century to serve a piecemeal notice to all religious extremists to denounce excesses.

Keywords: Religion, Extremism, Book Burning, Censorship, Late Antiquity, Pentecostalism.
Revealing the Dynamic Magnetoionic Environments of Repeating Fast Radio Burst Sources through Multiyear Polarimetric Monitoring with CHIME/FRB
Authors: Mckinven R. , Gaensler B. M. , Michilli D. , Masui K. , Kaspi V. M. , Su J. , Bhardwaj M. , Cassanelli T. , Chawla P. , Dong F. (Adam) , Fonseca E. , Leung C. , Li D. Z. , Ng C. , Patel C. , Pearlman A. B. , Petroff E. , Pleunis Z. , Rafiei-Ravandi M. , Rahman M. , Sand K. R. , Shin K. , Stairs I. H. , Tendulkar S.
Published: July 2023

Fast radio bursts (FRBs) display a confounding variety of burst properties and host-galaxy associations. Repeating FRBs offer insight into the FRB population by enabling spectral, temporal, and polarimetric properties to be tracked over time. Here, we report on the polarized observations of 12 repeating sources using multiyear monitoring with the Canadian Hydrogen Intensity Mapping Experiment (CHIME) over 400–800 MHz. We observe significant rotation measure (RM) variations from many sources in our sample, including RM changes of several hundred radians per square meter over month timescales from FRBs 20181119A, 20190303A, and 20190417A, and more modest RM variability (ΔRM ≲ few tens of radians per square meter) from FRBs 20181030A, 20190208A, 20190213B, and 20190117A over equivalent timescales. Several repeaters display a frequency-dependent degree of linear polarization that is consistent with depolarization via scattering. Combining our measurements of RM variations with equivalent constraints on DM variability, we estimate the average line-of-sight magnetic field strength in the local environment of each repeater. In general, repeating FRBs display RM variations that are more prevalent and/or extreme than those seen from radio pulsars in the Milky Way and the Magellanic Clouds, suggesting repeating FRBs and pulsars occupy distinct magnetoionic environments.
Dust Properties of 870 μm-selected Galaxies in GOODS-S
Authors: McKay S. J. , Barger A. J. , Cowie L. L. , Bauer F. E. , Rosenthal M. J. Nicandro
Published: July 2023

We analyze the dust properties of 57 870 μm-selected dusty star-forming galaxies in GOODS-S using new deep Atacama Large Millimeter/Submillimeter Array 1.2, 2, and 3 mm continuum imaging together with other far-infrared through millimeter data. We fit the spectral energy distributions (SEDs) with optically thin modified blackbodies to constrain the emissivity indices and effective dust temperatures, finding a median emissivity index of

β
=

1.78

−
0.25

+
0.43

and a median temperature of

T

d

=

33.6

−
5.4

+
12.1

K. We observe a negative correlation between β and T

d
. By testing several SED models, we determine that the derived emissivity indices can be influenced by opacity assumptions. Our temperature measurements are consistent with no evolution in dust temperature with redshift.
On Wave Interference in Planet Migration: Dead Zone Torques Modified by Active Zone Forcing
Authors: Chametla Raúl O. , Chrenko Ondřej , Lyra Wladimir , Turner Neal J.
Published: July 2023

We investigate planetary migration in the dead zone of a protoplanetary disk where there is a set of spiral waves propagating inward due to the turbulence in the active zone and the Rossby wave instability, which occurs at the transition between the dead and active zones. We perform global 3D unstratified magnetohydrodynamical simulations of a gaseous disk with the FARGO3D code, using weak gradients in the static resistivity profiles that trigger the formation of a vortex at the outer edge of the dead zone. We find that once the Rossby vortex develops, spiral waves in the dead zone emerge and interact with embedded, migrating planets by wave interference, which notably changes their migration. The inward migration becomes faster depending on the mass of the planet, due mostly to the constructive (destructive) interference between the outer (inner) spiral arm of the planet and the destruction of the dynamics of the horseshoe region by means of the set of background spiral waves propagating inward. The constructive wave interference produces a more negative Lindblad differential torque, which inevitably leads to an inward migration. Lastly, for massive planets embedded in the dead zone, we find that the spiral waves can create an asymmetric, wider, and deeper gap than in the case of α-disks and can prevent the formation of vortices at the outer edge of the gap. The latter could generate a faster or slower migration compared to the standard type-II migration.
All-sky Faint DA White Dwarf Spectrophotometric Standards for Astrophysical Observatories: The Complete Sample
Authors: Axelrod Tim , Saha Abhijit , Matheson Thomas , Olszewski Edward W. , Bohlin Ralph C. , Calamida Annalisa , Claver Jenna , Deustua Susana , Holberg Jay B. , Hubeny Ivan , Mackenty John W. , Malanchev Konstantin , Narayan Gautham , Points Sean , Rest Armin , Sabbi Elena , Stubbs Christopher W.
Published: July 2023

Hot DA white dwarfs (DAWDs) have fully radiative pure hydrogen atmospheres that are the least complicated to model. Pulsationally stable, they are fully characterized by their effective temperature T
eff and surface gravity

log

g

, which can be deduced from their optical spectra and used in model atmospheres to predict their spectral energy distributions (SEDs). Based on this, three bright DAWDs have defined the spectrophotometric flux scale of the CALSPEC system of the Hubble Space Telescope (HST). In this paper we add 32 new fainter (16.5 < V < 19.5) DAWDs spread over the whole sky and within the dynamic range of large telescopes. Using ground-based spectra and panchromatic photometry with HST/WFC3, a new hierarchical analysis process demonstrates consistency between model and observed fluxes above the terrestrial atmosphere to <0.004 mag rms from 2700 to 7750 Å and to 0.008 mag rms at 1.6 μm for the total set of 35 DAWDs. These DAWDs are thus established as spectrophotometric standards with unprecedented accuracy from the near-ultraviolet to the near-infrared, suitable for both ground- and space-based observatories. They are embedded in existing surveys like the Sloan Digital Sky Survey, Pan-STARRS, and Gaia, and will be naturally included in the Large Synoptic Survey Telescope  survey by the Rubin Observatory. With additional data and analysis to extend the validity of their SEDs further into the infrared, these spectrophotometric standard stars could be used for JWST, as well as for the Roman and Euclid observatories.
The Next Generation Virgo Cluster Survey (NGVS). XXXV. First Kinematical Clues of Overly Massive Dark Matter Halos in Several Ultradiffuse Galaxies in the Virgo Cluster
Authors: Toloba Elisa , Sales Laura V. , Lim Sungsoon , Peng Eric W. , Guhathakurta Puragra , Roediger Joel , Wang Kaixiang , Mihos J. Christopher , Côté Patrick , Durrell Patrick R. , Ferrarese Laura
Published: July 2023

We present Keck/DEIMOS spectroscopy of the first complete sample of ultradiffuse galaxies (UDGs) in the Virgo cluster. We select all UDGs in Virgo that contain at least 10 globular cluster (GC) candidates and are more than 2.5σ outliers in scaling relations of size, surface brightness, and luminosity (a total of 10 UDGs). We use the radial velocity of their GC satellites to measure the velocity dispersion of each UDG. We find a mixed bag of galaxies, from one UDG that shows no signs of dark matter, to UDGs that follow the luminosity–dispersion relation of early-type galaxies, to the most extreme examples of heavily dark matter–dominated galaxies that break well-known scaling relations such as the luminosity–dispersion or U-shaped total mass-to-light ratio relations. This is indicative of a number of mechanisms at play forming these peculiar galaxies. Some of them may be the most extended version of dwarf galaxies, while others are so extreme that they seem to populate dark matter halos consistent with that of the Milky Way or even larger. Even though Milky Way stars and other GC interlopers contaminating our sample of GCs cannot be fully ruled out, our assessment of this potential problem and simulations indicate that the probability is low and, if present, unlikely to be enough to explain the extreme dispersions measured. Further confirmation from stellar kinematics studies in these UDGs would be desirable. The lack of such extreme objects in any of the state-of-the-art simulations opens an exciting avenue of new physics shaping these galaxies.
Interplanetary Shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations
Authors: Hajra Rajkumar , Tsurutani Bruce T. , Lakhina Gurbax S. , Lu Quanming , Du Aimin , Shan Lican
Published: July 2023

The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ∼0.3 and 1.0 au from the Sun. With increasing heliocentric distance (r
h), the plasma speed is found to increase at ∼34–40 km s−1 au−1 and the density exhibits a sharper fall (

r

h

−
2

) compared to the magnetic field magnitude (

r

h

−
1.5

) and the temperature (

r

h

−
0.8

). Using all available solar wind plasma and magnetic field measurements, we identified 68 and 39 fast interplanetary shocks encountered by H1 and H2, respectively. The overwhelming majority (85%) of the shocks are found to be driven by interplanetary coronal mass ejections (ICMEs). While the two spacecraft encountered more than 73 solar wind high-speed streams (HSSs), only ∼22% had shocks at the boundaries of corotating interaction regions (CIRs) formed by the HSSs. All of the ICME shocks were found to be fast forward (FF) shocks; only four of the CIR shocks were fast reverse shocks. Among all ICME FF shocks (CIR FF shocks), 60% (75%) are quasi-perpendicular with shock normal angles (θ
Bn) ≥ 45° relative to the upstream ambient magnetic field, and 40% (25%) are quasi-parallel (θ
Bn < 45°). No radial dependences were found in FF shock normal angle and speed. The FF shock Mach number (M
ms), magnetic field, and plasma compression ratios are found to increase with increasing r
h at the rates of 0.72, 0.89, and 0.98 au−1, respectively. On average, ICME FF shocks are found to be considerably faster (∼20%) and stronger (with ∼28% higher M
ms) than CIR FF shocks.
Morphologies of Galaxies at z ≳ 9 Uncovered by JWST/NIRCam Imaging: Cosmic Size Evolution and an Identification of an Extremely Compact Bright Galaxy at z ∼ 12
Authors: Ono Yoshiaki , Harikane Yuichi , Ouchi Masami , Yajima Hidenobu , Abe Makito , Isobe Yuki , Shibuya Takatoshi , Wise John H. , Zhang Yechi , Nakajima Kimihiko , Umeda Hiroya
Published: July 2023

We present morphologies of galaxies at z ≳ 9 resolved by JWST/NIRCam 2–5 μm imaging. Our sample consists of 22 galaxy candidates identified by stringent dropout and photo-z criteria in GLASS, CEERS, SMACS J0723, and Stephan’s Quintet flanking fields, one of which has been spectroscopically identified at z = 11.44. We perform surface brightness (SB) profile fitting with GALFIT for six bright galaxies with a signal-to-noise ratio = 10–40 on an individual basis and for stacked faint galaxies with secure point-spread functions (PSFs) of the NIRCam real data, carefully evaluating systematics by Monte Carlo simulations. We compare our results with those of previous JWST studies, and confirm that the effective radii r
e of our measurements are consistent with those of previous measurements at z ∼ 9. We obtain r
e ≃ 200–300 pc with the exponential-like profiles, Sérsic indexes of n ≃ 1–1.5, for galaxies at z ∼ 12–16, indicating that the relation of r
e ∝ (1 + z)
s
for

s
=
−

1.22

−
0.16

+
0.17

explains cosmic evolution over z ∼ 0–16 for

∼

L

z
=
3

*

galaxies. One bright (M
UV = −21 mag) galaxy at z ∼ 12, GL-z12-1, has an extremely compact profile with r
e = 39 ± 11 pc that is surely extended over the PSF. Even in the case that the GL-z12-1 SB is fit by active galactic nuclei + galaxy composite profiles, the best-fit galaxy component is again compact,

r

e

=

48

−
15

+
38

pc, which is significantly (>5σ) smaller than the typical r
e value at z ∼ 12. Compared with numerical simulations, we find that such a compact galaxy naturally forms at z ≳ 10, and that frequent mergers at the early epoch produce more extended galaxies following the r
e ∝ (1 + z)
s
relation.
The Radial Distribution of Ion-scale Waves in the Inner Heliosphere
Authors: Liu Wen , Zhao Jinsong , Wang Tieyan , Dong Xiangcheng , Kasper Justin C. , Bale Stuart D. , Shi Chen , Wu Dejin
Published: July 2023

Determining the mechanism responsible for plasma heating and particle acceleration is a fundamental problem in the study of the heliosphere. Due to efficient wave–particle interactions of ion-scale waves with charged particles, these waves are widely believed to be a major contributor to ion energization, and their contribution considerably depends on the wave occurrence rate. By analyzing the radial distribution of quasi-monochromatic ion-scale waves observed by the Parker Solar Probe, this work shows that the wave occurrence rate is significantly enhanced in the near-Sun solar wind, specifically 21%–29% below 0.3 au, in comparison to 6%–14% beyond 0.3 au. The radial decrease of the wave occurrence rate is not only induced by the sampling effect of a single spacecraft detection, but also by the physics relating to the wave excitation, such as the enhanced ion beam instability in the near-Sun solar wind. This work also shows that the wave normal angle θ, the absolute value of ellipticity ϵ, the wave frequency f normalized by the proton cyclotron frequency f
cp, and the wave amplitude δ
B normalized by the local background magnetic field B
0 slightly vary with the radial distance. The median values of θ, ∣ϵ∣, f, and δ
B are about 9°, 0.73, 3f
cp, and 0.01B
0, respectively. Furthermore, this study proposes that the wave mode natures of the observed left-handed and right-handed polarized waves correspond to the Alfvén ion cyclotron mode wave and the fast magnetosonic whistler mode wave, respectively.
Environmental Dependence of the Mass–Metallicity Relation in Cosmological Hydrodynamical Simulations
Authors: Wang Kai , Wang Xin , Chen Yangyao
Published: July 2023

We investigate the environmental dependence of the gas-phase metallicity for galaxies at z = 0 to z ≳ 2 and the underlying physical mechanisms driving this dependence using state-of-the-art cosmological hydrodynamical simulations. We find that, at fixed stellar mass, central galaxies in massive halos have lower gas-phase metallicity than those in low-mass halos, while satellite galaxies residing in more massive halos are more metal-rich. The combined effect is that massive galaxies are more metal-poor in massive halos and low-mass galaxies are more metal-rich in massive halos. By inspecting the environmental dependence of other galaxy properties, we identify that the accretion of low-metallicity gas is responsible for the environmental dependence of central galaxies at high z, whereas the AGN feedback processes play a crucial role at low z. For satellite galaxies, we find that both the suppression of gas accretion and the stripping of existing gas are responsible for their environmental dependence, with negligible effect from the AGN feedback. Finally, we show that the difference of gas-phase metallicity as a function of stellar mass between protocluster and field galaxies agrees with recent observational results, for example from the MAMMOTH-Grism survey.
Scattering of Ions at a Rippled Shock
Authors: Gedalin Michael , Pogorelov Nikolai V. , Roytershteyn Vadim
Published: July 2023

In a collisionless shock the energy of the directed flow is converted to heating and acceleration of charged particles, and to magnetic compression. In low-Mach number shocks the downstream ion distribution is made of directly transmitted ions. In higher-Mach number shocks ion reflection is important. With the increase of the Mach number, rippling develops, which is expected to affect ion dynamics. Using ion tracing in a model shock front, downstream distributions of ions are analyzed and compared for a planar stationary shock with an overshoot and a similar shock with ripples propagating along the shock front. It is shown that rippling results in the distributions, which are substantially broader and more diffuse in the phase space. Gyrotropization is sped up. Rippling is able to generate backstreaming ions, which are absent in the planar stationary case.
Void Lensing in Cubic Galileon Gravity
Authors: Su Chen , Shan Huanyuan , Zhang Jiajun , Zhao Cheng , Yu Jiaxi , Wang Qiao , Xiao Linfeng , Liu Xiangkun , Zhao An
Published: July 2023

Weak-lensing studies via cosmic voids are a promising probe of modified gravity (MG). The excess surface mass density (ESD) is widely used as a lensing statistic in weak-lensing research. In this paper, we use the ray-tracing method to study the ESD around voids in simulations based on cubic Galileon (CG) gravity. With the compilation of an N-body simulation and the ray-tracing method, changes in structure formation and deflection angle resulting from MG can both be considered, making the extraction of lensing signals more realistic. We find good agreements between the measurement and theoretical prediction of ESD for CG gravity. However, the lensing signals are much less affected by the change in the deflection angle than by the change in the structure formation, indicating a good approximation of the ESD (statistics) as the projection of the 3D dark matter density field. Finally, we demonstrate that it is impossible to distinguish CG and general relativity in our simulation, but in the next-generation survey, thanks to the large survey area and the increased galaxy number density, detecting the differences between these two models is possible. The method employed in this paper, which combines an N-body simulation and the ray-tracing method, can be a robust way to measure the lensing signals from simulations based on the MGs, and especially on that which significantly modifies the deflection angle.
Lepto-hadronic Interpretation of 2021 RS Ophiuchi Nova Outburst
Authors: De Sarkar Agnibha , A. J. Nayana , Roy Nirupam , Razzaque Soebur , Anupama G. C.
Published: July 2023

Very-high-energy (VHE; 100 GeV < E ≤ 100 TeV) and high-energy (HE; 100 MeV < E ≤ 100 GeV) gamma rays were observed from the symbiotic recurrent nova RS Ophiuchi (RS Oph) during its outburst in 2021 August by various observatories, such as the High Energy Stereoscopic System (HESS), Major Atmospheric Gamma Imaging Cherenkov (MAGIC), and Fermi-Large Area Telescope (LAT). The models that have been explored so far tend to favor a hadronic scenario of particle acceleration over an alternative leptonic scenario. This paper explores a time-dependent lepto-hadronic scenario to explain the emission from the RS Oph source region. We have used simultaneous low-frequency radio data observed by various observatories along with the data provided by HESS, MAGIC, and Fermi-LAT to explain the multiwavelength spectral energy distributions corresponding to 4 days after the outburst. Our results show that a lepto-hadronic interpretation of the source not only explains the observed HE-VHE gamma-ray data but the corresponding model synchrotron component is also consistent with the first 4 days of low-radio-frequency data, indicating the presence of nonthermal radio emission at the initial stage of the nova outburst. We have also calculated the expected neutrino flux from the source region and discuss the possibility of detecting neutrinos.
Richardson–Lucy Deconvolution with a Spatially Variant Point-spread Function of Chandra: Supernova Remnant Cassiopeia A as an Example
Authors: Sakai Yusuke , Yamada Shinya , Sato Toshiki , Hayakawa Ryota , Higurashi Ryota , Kominato Nao
Published: July 2023

Richardson–Lucy (RL) deconvolution is one of the classical methods widely used in X-ray astronomy and other areas. Amid recent progress in image processing, RL deconvolution still leaves much room for improvement under realistic situations. One direction is to include the positional dependence of a point-spread function (PSF), so-called RL deconvolution with a spatially variant PSF (RLsv). Another is the method of estimating a reliable number of iterations and their associated uncertainties. We developed a practical method that incorporates the RLsv algorithm and the estimation of uncertainties. As a typical example of bright and high-resolution images, the Chandra X-ray image of the supernova remnant Cassiopeia A was used in this paper. RLsv deconvolution enables us to uncover the smeared features in the forward/backward shocks and jet-like structures. We constructed a method to predict the appropriate number of iterations using statistical fluctuation of the observed images. Furthermore, the uncertainties were estimated by error propagation from the last iteration, which was phenomenologically tested with the observed data. Thus, our method is a practically efficient framework to evaluate the time evolution of the remnants and their fine structures embedded in high-resolution X-ray images.
An Astrometric Mass Estimate for (624) Hektor
Authors: Kretlow Mike
Published: July 2023

Jupiter Trojans are remnants of the early solar system. In this research note I present and discuss the mass and the bulk density of the largest Jovian Trojan (624) Hektor, obtained from its gravitational interaction with (437759) 2014 GG47.
Synergistic combination of aztreonam and ceftazidime/avibactam against resistant Stenotrophomonas maltophilia on pancreatitis
Authors: De Almeida Torres Natália , Morales Junior Ronaldo , Bueno Lopes Luis Fernando , Zeigler Rogério , Everson Uip David
Published: July 2023

Introduction: Stenotrophomonas maltophilia is a Gram-negative, opportunistic pathogen associated with a high morbidity and mortality rate. We report our clinical experience in treating a patient with infected pancreatic necrosis caused by multidrug-resistant (MDR) S. maltophilia with a novel drug combination.
Case report: A 65-year-old male with history of type II diabetes was admitted with acute pancreatitis, voluminous ascites, and signs of sepsis after undergoing an echo-endoscopy procedure with pancreas biopsy to investigate a Wirsung duct dilatation. Retroperitoneal fluid culture revealed S. maltophilia resistant to colistin and with intermediate susceptibility to trimethoprim-sulfamethoxazole and levofloxacin. The synergy between aztreonam (ATM) and ceftazidime/avibactam (CZA) was demonstrated using the combined disk pre-diffusion test.
Conclusions: There are sparse data providing guidance on the optimal regimen against MDR S. maltophilia infections. Although in this case a surgical excision was essential, combination of ATM and CZA provided effective synergistic antimicrobial treatment with clinical cure of severe acute pancreatitis infected with S. maltophilia. The combined disk pre-diffusion test with ATM and CZA requires no special equipment and can be routinely performed in clinical microbiology labs. Combination of ATM with CZA should be considered for cases of MDR S. maltophilia infections with limited treatment options.