bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative biomechanical study of reversed less invasive stabilization system and proximal femoral nail antirotation for unstable intertrochanteric fractures
Authors: Chen Ying , Liu Shouyao , Lin Peng , Wang Yunting , Wang Jinhui , Tao Jianfeng , Cai Rongrong
Published: January 2024

Objective

Unstable intertrochanteric fractures (ITFs) are mostly treated by proximal femoral nail antirotation (PFNA), Inter-Tan, Asian Hip, and other new internal fixation devices. But for complex unstable fractures, such as crushed lateral wall of the greater trochanter, the loss of fixation point on lateral wall slightly reduces the fixing effect. This study aimed to compare the biomechanical strengths between reversed less invasive stabilization system (LISS) and PFNA for treatment of unstable ITFs.

Methods

Forty synthetic femurs were used to simulate unstable ITFs in vitro and were fixed using the reversed LISS or PFNA. These fractures were divided into two groups depending on whether the lateral wall of the greater trochanter is intact or not (AO classification: 31-A2.3 and 31-A3.3, respectively). The load-displacement of femur, stiffness, ultimate load, and cyclic fatigue resistance were detected using an incremental load test and a dynamic fatigue test through an MTS 858 test system.

Results

For both 31-A2.3 and 31-A3.3, the vertical sinking displacement (VSD) of the femoral head under 500 N load was insignificantly smaller after treatment with reversed LISS than with PFNA, and when the displacement was 5 mm, the femoral head bore insignificantly greater load. The fixation with reversed LISS resulted in greater axial stiffness of the femur but smaller ultimate load. During the same cycle in the dynamic fatigue test, the VSD was insignificantly smaller with the fixation of reversed LISS.

Conclusion

Reversed LISS and PFNA have similar biomechanical strength for unstable ITFs. This conclusion should be supported by additional large-size research on basic biomechanics and clinical application. This is the first comparative biomechanical study comparing reversed LISS and PFNA for unstable ITFs.
Surgical treatment of 21 patients with spinal metastases of differentiated thyroid cancer
Authors: Jiang Liang , Ouyang Hanqiang , Liu Xiaoguang , Wei Feng , Wu Fengliang , Dang Lei , Liu Zhongjun
Published: January 2024

Background

Differentiated thyroid cancer (DTC) is a common primary cancer for spinal metastases (SM). The treatments for DTC spinal metastases (SM) have evolved from simple surgery and radiotherapy to a multidisciplinary comprehensive therapeutic strategy of combined spinal surgery, general surgery, radiotherapy, nuclear medicine and endocrinology. The purpose of this study was to discuss the efficacy and prognosis associated with different surgical treatments of SM patients with DTC.

Methods

A total of 21 consecutive patients with SM of DTC that were treated between 1999 and 2013 were studied. Biopsy was routinely performed to achieve the pathological diagnosis before treatment. Three patients underwent total spondylectomy intralesionally or piecemeally, and 18 had curettage. Postoperative recurrence and survival times were analyzed by the Kaplan-Meier methods.

Results

Nineteen patients (90%) had an average of 42.7 months (range, 7-170 months) follow-up. The median visual analogue scale for pain reduced from 5 points to 1 point (P <0.01), and the median Karnofsky performance score increased from 70 to 90 points after surgery (P <0.01). Seventeen patients with neurological deficits attained improvements after surgeries, of at least one level according to the Frankel classification (P <0.01). Eight patients with curettage had recurrence. Four patients died of DTC, 12 patients lived with disease, and three patients were disease-free. No significant effects on postoperative recurrence or survival were observed between surgery combined with conservative treatment, total spondylectomy, the number of bone metastases and visceral metastasis.

Conclusions

DTC-SM have a relatively favorable prognosis, and curettage and stabilization can effectively relieve the pain and improve the quality of life and neurological status of the patients. For patients with Tomita scores of ≤3, total spondylectomy may have better clinical outcomes. Comprehensive therapeutic strategies including surgery, radioiodine, external beam radiation therapy and embolization should be considered for most patients.
Allergic diseases, immunoglobulin E, and autoimmune pancreatitis: a retrospective study of 22 patients
Authors: Zhang Li , Guo Limei , Huang Yonghui , Wang Tianli , Shi Xueying , Chang Hong , Yao Wei , Huang Xuebiao
Published: January 2024

Background

Autoimmune pancreatitis (AIP) is a chronic inflammatory disease of pancreas. We evaluated the clinical manifestations, imaging, and histological presentations of AIP in Chinese patients, and investigated the roles of immunoglobulin E (IgE) and allergic diseases in the diagnosis and pathogenesis of AIP.

Methods

The clinical records of 22 patients diagnosed with AIP were reviewed and analyzed. All patients with AIP fulfilled the 2006 revised diagnostic criteria proposed by Japan Pancreas Society or the Korean Criteria for AIP.

Results

Half (11/22) of AIP patients had allergic diseases. Twenty-one patients had elevated serum IgE levels, and 14 patients had IgE levels more than 3 times that of normal. There were no significant differences between the patients with higher or lower IgE, with or without allergic disease, in clinical features, laboratory tests, diffuse or focal lesions, or the choice of treatment methods; however, more complaints of body weight loss were observed in patients with higher IgE levels. Patients with higher IgE levels and with allergic diseases were more likely to have onset in March, April, May, August, September, or October. IgE levels decreased after therapy, but increased again during recurrence. Increased number of mast cells was found in the pancreatic tissue in AIP.

Conclusions

IgE maybe a useful marker for monitoring therapeutic response and recurrence of AIP. Allergic processes may play an important role in the pathogenesis of AIP.
Adjacent segment disease after anterior cervical decompression and fusion: analysis of risk factors on X-ray and magnetic resonance imaging
Authors: Zhao Yanbin , Sun Yu , Zhou Feifei , Wang Shaobo , Zhang Fengshan , Pan Shengfa
Published: January 2024

Background

Adjacent segment disease (ASD) is common after cervical fusion. The aim of this study was to evaluate the risk factors for ASD on X-ray and magnetic resonance imaging (MRI).

Methods

Patients included in this study had received revision surgeries after developing symptomatic ASD following anterior decompression and fusion. A control group that had not developed ASD was matched 1:1 by follow-up time and fusion segments. Plate-to-disc distances (PDDs), developmental cervical canal stenosis on X-ray, cervical disc degeneration grading, and cervical disc bulge impingements on preoperative MRI were measured and compared between the ASD group and the control group.

Results

Thirty-four patients with complete radiographic data were included in the ASD group. The causative segments of ASD included nine cases of C3–4, 18 cases of C4–5, three cases of C5–6, and four cases of C6–7. The ASD occurred at the upper adjacent segments in 26 patients and at the lower adjacent segments in eight patients. PDD distributions were similar between the ASD group and the control group. Developmental cervical canal stenosis was a risk factor for ASD, with an odd ratio value of 2.88. Preoperative cervical disc degenerations on MRI were similar between the ASD group and the control group. In the upper-level ASD group, the disc bulge impingement was (19.7±9.7)%, which was significantly higher than that of the control group of (11.8±4.8)%.

Conclusions

ASD was more likely to develop above the index level of fusion. Developmental cervical canal stenosis and greater disc bulge impingement may be risk factors for the development of ASD.
Working conditions of bipolar radiofrequency on human articular cartilage repair following thermal injury during arthroscopy
Authors: Huang Yuelong , Zhang Yujun , Ding Xiaoquan , Liu Songyang , Sun Tiezheng
Published: January 2024

Background

The thermal injury during bipolar radiofrequercy results in chondrocyte death that limits cartilage repair. The purpose was to determine the effects of various factors of bipolar radiofrequency on human articular cartilage after thermal injury, offering suitable working conditions for bipolar radiofrequency during arthroscopy.

Methods

Osteochondral explants from 28 patients undergoing total knee arthroplasty (TKA) in Department of Orthopaedic, Peking University Reople's Hospital from October 2013 to May 2014, were harvested and treated using bipolar radiofrequency in a light contact mode under the following conditions: various power setting of levels 2, 4 and 6; different durations of 2 seconds, 5 seconds and 10 seconds; irrigation with fluids of different temperatures of 4°C, 22°C, and 37°C; two different bipolar radiofrequency probes ArthroCare TriStar 50 and Paragon T2. The percentage of cell death and depth of cell death were quantified with laser confocal microscopy. The content of proteoglycan elution at different temperatures was determined by spectrophotometer at 530 nm.

Results

Chondrocyte mortality during the treatment time of 2 seconds and power setting of level 2 was significantly lower than that with long duration or in higher level groups (time: P=0.001; power: P=0.001). The percentage of cell death after thermal injury was gradually reduced by increasing the temperature of the irrigation solutions (P=0.003), the depth of dead chondrocytes in the 37°C solution group was significantly less than those in the 4°C and 22°C groups (P=0.001). The proteoglycan elution was also gradually reduced by increasing the temperature (P=0.004). Compared with the ArthroCare TriStar 50 group, the percentage of cell death in the Paragon T2 group was significantly decreased (P=0.046).

Conclusions

Thermal chondroplasty with bipolar radiofrequency resulted in defined margins of chondrocyte death under controlled conditions. The least cartilage damage during thermal chondroplasty could be achieved with lower power, shorter duration, suitable temperature of irrigation solutions and chondroprotective probes. The recommendations for the use of bipolar radiofrequency to minimize cartilage damage could be achieved with a power setting of level 2, treatment duration of 2 seconds, suitable fluid temperature (closer to body temperature of 37°C) and chondroprotective Paragon T2 probes.
Clinical value of optimized magnetic resonance imaging for evaluation of patients with painful hip arthroplasty
Authors: He Chuan , Lu Yong , Jiang Meihua , Feng Jianmin , Wang Yi , Liu Zhihong
Published: January 2024

Background

The imaging evaluation of pain in patients who have had a hip arthroplasty (HA) is challenging, and traditional imaging techniques, including magnetic resonance imaging (MRI) and computerized tomography (CT), are limited by metallic artifact. The purpose of the present study was to investigate the use of modified MRI techniques to visualize periprosthetic soft tissues and the bone-implant interface, and to evaluate the value of MRI for the assessment of patients with painful hip arthroplasty.

Methods

Fifty-six painful hips in fifty-six patients following primary HA were assessed using optimized MRI, CT and standardized radiographs. The diagnosis of MRI was correlated with intraoperative findings as well as with microbiological and histological examinations (when available). The sensitivity and the specificity of MRI diagnosis were determined according to final diagnosis. The chi-square test was performed to detect a difference between MRI and final diagnosis.

Results

Forty-eight patients have received revision surgery and final diagnosis were established. MRI was demonstrated high sensitivity and specificity in detecting aseptic loosening (93% and 95%), periprosthetic infection (94% and 97%), adverse local tissue reaction (100% and 100%) and periprosthetic fracture (100% and 100%). MRI was determined to be the most sensitive technique in detecting implant loosening for any reason, with a sensitivity of 93.8% for acetabular shell and 97.1% for femoral stem, compared to 81.3% and 80.0% on CT, 75.0% and 77.1% on radiographs.

Conclusions

Optimized MRI was effective for the assessment of the periprosthetic soft tissues and bone. The use of modified magnetic resonance imaging parameters provided a useful adjunct to conventional examinations for the evaluation of patients with painful hip arthroplasty.
Çağdaş Futbolun Güncel Yüzü (101 Soruda Futbol Yönetimi ve Stratejileri)
Authors: Samur Serdar
Published: January 2024

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Abay’ın Ölümle İmtihanı
Authors: Yılmaz Fatih Sultan
Published: January 2024

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Tecnologías de la Información y Gestión de Calidad en el Turismo: Evaluación integral e implicancias
Authors: Figueroa Quito Silvia Isabel , Norabuena Mendoza César Hernán , Toledo Quiñones Ricardo Enrique , Toledo Quiñones Carlos Julián
Published: January 2024

El objetivo del estudio era explorar la conexión entre el empleo de las Tecnologías de la Información y Comunicación (TIC) y la Gestión de la Calidad en las empresas de servicios turísticos en Huaraz. Se buscó describir el estado actual en aspectos clave: la infraestructura y el acceso a las tecnologías, el uso y habilidades tecnológicas, el impacto y las estrategias de las TIC; describir el control de procesos, la mejora continua en la tecnología y la satisfacción del cliente para gestionar la calidad de las empresas turísticas. El enfoque de la investigación fue cuantitativo, con un diseño no experimental, descriptivo y correlacional. La población del estudio incluyó 94 empresas de servicios turísticos, y la muestra consistió en 75 responsables de estas empresas, seleccionados mediante un muestreo aleatorio simple. La recopilación de datos se realizó a través de un cuestionario. Para establecer y confirmar la fuerza y la dirección de la relación entre variables, se utilizó el estadístico d de Somers. Se llegó a la conclusión de que existe una relación directa entre el uso de las TIC y la Gestión de la Calidad en las empresas de servicios turísticos. Sin embargo, los resultados también sugieren que hay oportunidades de mejora tanto en el uso y las competencias tecnológicas como en la implementación de prácticas efectivas de gestión de la calidad.
Falencias Normativas y Principales Desafíos Empresariales del Trabajo a Distancia en Colombia
Authors: Viviel González Jorge Enrique
Published: January 2024

En Colombia, la pandemia causada por el COVID-19 impulsó la incorporación de alternativas laborales de trabajo a distancia, tales como el trabajo en casa, el trabajo remoto y el teletrabajo; sin embargo, al revisar el marco legal de estas figuras, se pueden identificar algunas falencias o vacíos, sumado al hecho de que las normas no ofrecieron esquemas adecuados de flexibilización de las relaciones laborales que además abrieran la puerta a poder abordar apropiadamente el nomadismo digital. Además, en la práctica, aquellas compañías que han implementado estos modelos han identificado desafíos corporativos que también suponen obstáculos para su correcta adopción.  Este artículo propone un análisis del contexto normativo que rodea a los modelos de trabajo a distancia en Colombia, identificando aquellos aspectos que no fueron tenidos en cuenta, seguido de una descripción de los retos corporativos de la puesta en marcha del trabajo a distancia, junto con una interpretación de los resultados derivados de los datos proporcionados por el Departamento Administrativo Nacional de Estadística (DANE) y de las encuestas realizadas a empleadores en Colombia. Esto se hace con el fin de evidenciar las numerosas falencias que enfrentan los modelos de trabajo a distancia y su estado actual.
Metal Military Equipment from Tepecik Settlement at Patara
Authors: Şahin Feyzullah
Published: January 2024

The subject matter of this work is the metal military equipment that was found in the military settlement of Tepecik, situated on a natural rock north of the Patara city center and east of the inner harbor. Construction activities for defense purposes can be traced back to the 6th century B.C. in the settlement. During the excavations conducted in recent years, a garrison was unearthed, that had been built in the middle of the 4th century B.C. and remained in use until the end of the 3rd century B.C. with some architectural transformation.

The metal military equipment comprises a pilum, arrowheads, bolt-heads / spear butts, javelin heads, a catapult trigger mechanism part, sling bullets and a dagger. A limited number of metal military tools are dated to the 6th/5th century B.C. Apart from these, the great majority of the weapons pertain to the period to the middle of the 4th century B.C. and the 3rd century B.C. with a few other examples dating to the 2nd century B.C. All the metal equipment accords well with the history of Patara and strengthens the data on various architectural phases detected in the Tepecik settlement. Furthermore, we can say that certain weapons found among the military equipment stand out as rarely seen specimens: A pilum and a curved dagger which are known to have very few examples in Anatolia. A lead sling bullet inscribed with the names of Philip II of Macedon and Alexander the Great is the one and only example of this specimen in Anatolia. The trigger claw of a catapult is also of capital importance since it provides evidence for a much-debated mechanism.
Vacunación de BCG en el medio rural y la importancia del conocimiento de sus beneficios
Authors: Abecasis Deborah , Cantera Andrea , Ostoich Veronika , García Luisa
Published: January 2024

Objetivo General: Establecer nivel de conocimiento sobre tuberculosis y vacuna, BCG., de padres y representantes, en Ambulatorio Gabriel Trompiz, Tucacas, Estado Falcón. Metodología: Es un estudio descriptivo de tipo transversal, con una muestra poblacional de 180 madres, padres y representantes entre octubre y diciembre de 2022. Se utilizaron encuestas, formularios elaborados y validados en estudios anteriores; la información fue procesada con el programa estadístico Microsoft Excel. Resultados: la mayor parte de la población respondió que la tuberculosis es una enfermedad producida por un virus, con respecto a la importancia de las inmunizaciones, un 20% desconocía la importancia de la vacunación. El 77% conocía información básica acerca de la vacuna BCG. En cuanto a las enfermedades prevenibles por esta vacuna, un 54% respondió que se trataba sobre la tuberculosis, mientras que casi la mitad de la población estudiada tenía la creencia que tenía que ver con el resfriado común. El 72% de la población considera que la fiebre es una contraindicación para la aplicación de la vacuna BCG. Se demostró que existía una gran desinformación con respecto a la vacunación en la población infantil en el medio rural venezolano.
The Influence of Organizational Culture on Employee Engagement: The Role of Organizational Commitment As An Intervening Variable
Authors: Siswanto Agus
Published: January 2024

The purpose of this paper is to determine the influence of Organizational Culture on employee engagement with organizational commitment as an intervening variable. This research used a quantitative approach to reveal the relationship between research variables with Structural Equation Modeling (PLS-SEM) as a data analysis tool. The findings of this research are Organizational Culture has a positive and significant influence on employee engagement. Organizational commitment has a positive and significant influence on mediating Organizational Culture to employee engagement. This research provides a new perspective on Human Resource Management with KSPPS BMT UGT Nusantara as the research object.
Proactive personality and Innovative Work Behavior A META-ANALYSIS
Authors: Lailla Nor , Nuraeni Nuraeni
Published: January 2024

Objective from study This is explore between Innovative Work Behavior and Proactive personality through meta analysis for provide alternative offers more knowledge_ Good about literature Innovative Work Behavior in development organization. Based on exposure results findings search the articles above related meta analysis study Proactive personality and Innovative Work Behavior can concluded a number of study confirm connection positive between Proactive personality and Innovative Work Behavior. With thus, research This conducted in 7 journals with 25 studies for test magnitude connection between Proactive personality and Innovative Work Behavior, and For see influence to connection between Proactive personality and Innovative Work Behavior. From the results discussion connection between Innovative Work Behavior and Proactive personality with meta analysis concluded that the average effect proactive personality increase Innovative Work Behavior of 0.43 or 43% which is included category low. While 57% is influenced by variables other.
Bibliometric Analysis of Cooperative Leadership Using Vosviewer Application
Authors: Rosmayati Siti , Maulana Arman
Published: January 2024

This study aims to systematically analyze and demonstrate bibliometric analysis of data step by step using VOSViewer. A step-by-step analysis is provided to make first-time users access and utilize VOSViewers more easily. This study provides data analysis regarding Cooperative leadership so far by utilizing the mapping tool in VOSViewer. The method used is descriptive qualitative to describe the performance of bibliometric analysis by producing network visualizations of selected topics. From the search results, 25 relevant journals were found that were published in the last three years, which were then grouped into three categories according to the year of publication. After grouping journal data, researchers found that the number of articles published on the topic of cooperative leadership from 2019 to 2023 was 114 items. As a result, it is concluded that cooperative leadership is a field that can be combined with other fields to be studied. It's a way of showing lots of opportunities to discover new things to define a theme. Furthermore, this analysis is expected to be a source for researchers to conduct research and determine research themes.
Impact of The Covid-19 Pandemic on The Effectiveness of Ship Crew Schedule at PT Surf Marine Indonesia
Authors: Damayanti Putu Ayu , Sihombing Derma Watty , Herawati Susi
Published: January 2024

Health is very important for all humans, because without good health it will be difficult to carry out daily activities. According to the Health Law Number 36 Year 2009 Article 1 "Health is a healthy state, both physically, mentally, spiritually and socially that allows everyone to live socially and economically productive". In the world of work, health is one of the main things that workers must have to do their work. Including in the world of shipping both on land and at sea. Workers at sea, especially ship crews at work, must be in good health so that they can carry out activities on board as much as possible. Before the ship's crew boarded the ship, the ship's crew had to do a medical check-up as a mandatory requirement to board the ship. Every three or six months the ship's crew will make a crew change because the work contract has expired and the ship will look for a replacement crew to work on the ship. During the Covid-19 pandemic, crew changes experienced obstacles because the spread of this virus was quite fast. All regions in the world are currently implementing strict health protocols to deal with the COVID-19 pandemic. Especially for ship crews, they also implement strict procedures to deal with Covid-19. During a pandemic. During this pandemic, the challenges faced by the manning division are very high where the process of changing ship crews is very difficult to carry out, while the crew on board the ship has expired. Another challenge faced when changing crews is that there is no standby crew so that the crew's working period on the ship is not in accordance with the previously agreed Sea Work Agreement.
The Model of Digital Communication and Supply Chains For The Tourism Industry
Authors: Komar Priatna Deden , Roswinna Winna
Published: January 2024

This research aims to understand the effects of digital communication, supply chain services and tourism on the decision to visit Indonesia. A quantitative approach was used to gather data through 400 survey participants. This study took the form of a methodology, design and approach framework. It analyzed the effect of digital communication, supply chain services and tourism with Quantitative data collected from Indonesia tourists and social media users. Probability sampling was used to collect data in a random manner. This method was used in a study that used Structural Equation Modeling and the SEM-PLS method. Results showed that digital supply chain and communication services had a significant positive impact on the interest of visitors. This led to a significant increase in their choice to visit a location. Additionally, this led to a significant increase in the impact of their decision on whether or not to visit.
Completeness of Delivery and Accuracy of Delivery Diagnosis Code On The Smooth Verification of BPJS Claims in Hospital
Authors: Heltiani Nofri , Nababan Lolli , Nababan Lolli , Putri Liza
Published: January 2024

The completeness of the files and the accuracy of the diagnostic code have an important role in the smooth verification of claims and are the basis for the approval of fee billing by BPJS to Hospitals. From the results of initial observations of 10 samples of claim files for delivery cases submitted to BPJS, it was found that 4 (40%) files passed verification and 6 (60%) files were pending due to incomplete claim files such as no supporting reports and DPJP signatures and coding information which are not in accordance with BPJS Health, resulting in delays in the claim payment process which causes material losses for the Hospital. The purpose of this study was to determine the completeness of the file and the accuracy of the delivery diagnosis code for the smooth verification of BPJS claims. this type of research is observational with a descriptive design. The population in this study was 137 files with 58 samples taken by simple random sampling which were processed univariately using a frequency distribution. The results of the study were claim files for complete and smooth delivery cases 31(53%), complete claim files but not smooth verification 22(38%) and incomplete claim files and not smooth verification 5(9%), while the delivery diagnosis code was accurate and smooth verification 31(53%), diagnostic codes accurate but verification not smooth 5(9%) and diagnostic codes inaccurate and verification not smooth 22(38%). It is recommended that the Hospital should make efforts to improve the accuracy of the diagnostic code through training, monitoring and regular evaluation to minimize the occurrence of claim returns.
Beyond Price and Prosmotions: Uncovering the Drivers of Guest Choice at V Hotel and Residence Bandung
Authors: Fenny Fenny , Suryati Lili
Published: January 2024

The purpose of this study to determine how the price, product, promotion, purchasing decisions, and how much influence the price, the product, and promotions on consumer purchasing decisions This research is a census, the number of objects in a population of 100. The research method used in this research is descriptive analysis method. The data analysis technique used is the technique of correlation analysis and path analysis techniques. Correlation analysis techniques to determine the relationship between variables, while the technique of path analysis to determine how much influence the independent variables on the dependent variable. The software used to process and analyze the data of this study was SPSS version 23. The results showed that the variable conditions of the price, product,promotion and purchasing decisions included in both categories.
Service Quality and Customer Satisfaction Have an Impact on Increasing Hotel Room Occupancy Ratio: Literature Review Study
Authors: Candra Primadi , Mahaputra M. Rizky , Mahaputra M. Ridho
Published: January 2024

The aim of this study is to provide qualitative evidence related to the variables of this study from sources derived from national and international indexed journals or scientific articles found through Google Scholar. Researchers then make recommendations from their own perspectives. The research method used in this qualitative study uses a mini-review approach to achieve the research objectives. A mini-evaluation of the variables is done by reading and analyzing dozens of peer-reviewed journal articles. Research results, although still minimal and far from perfect, meet expectations and at least contribute to science and knowledge, especially in the areas of marketing management, service quality variables, customer satisfaction, and revenue improvement. I found out that there is.  Just as customer satisfaction variables affect hotel room occupancy, service quality also affects hotel room occupancy. Increasing the above variables should always be done within the study population, especially for guests staying directly at the hotel. It should also be done in future research. There are gaps in other variables that could be used for future research, such as price, advertising, location, loyalty and brand image variables.
Decade-long Timing of Four GMRT Discovered Millisecond Pulsars
Authors: Sharma Shyam S. , Roy Jayanta , Bhattacharyya Bhaswati , Levin Lina
Published: January 2024

The discovery and timing follow up of millisecond pulsars (MSPs) are necessary not just for their usefulness in pulsar timing arrays (PTAs) but also for investigating their own intriguing properties. In this work, we provide the findings of the decade-long timing of four MSPs discovered by the Giant Meterwave Radio Telescope (GMRT), including their timing precision, model parameters, and newly detected proper motions. We compare the timing results for these MSPs before and after the GMRT upgrade in 2017 and characterize the improvement in timing precision due to the bandwidth upgrade. We discuss the suitability of these four GMRT MSPs as well as the usefulness of the decade-long timing data for PTA experiments. These data may aid in the global effort to improve the signal-to-noise ratios of recently detected signature of gravitational waves in cross-correlation statistics of residuals of MSPs.
The DESI One-Percent Survey: A Concise Model for the Galactic Conformity of Emission-line Galaxies
Authors: Gao Hongyu , Jing Y. P. , Xu Kun , Zhao Donghai , Gui Shanquan , Zheng Yun , Luo Xiaolin , Aguilar Jessica Nicole , Ahlen Steven , Brooks David , Claybaugh Todd , Cole Shaun , de la Macorra Axel , Forero-Romero Jaime E. , Gontcho A Gontcho Satya , Ishak Mustapha , Lambert Andrew , Landriau Martin , Manera Marc , Meisner Aaron , Miquel Ramon , Nie Jundan , Rezaie Mehdi , Rossi Graziano , Sanchez Eusebio , Schubnell Michael , Seo Hee-Jong , Tarlé Gregory , Weaver Benjamin Alan , Zhou Zhimin
Published: January 2024

Galactic conformity is the phenomenon whereby a galaxy of a certain physical property is correlated with its neighbors of the same property, implying a possible causal relationship. The observed auto correlations of emission-line galaxies (ELGs) from the highly complete DESI One-Percent Survey exhibit a strong clustering signal on small scales, providing clear evidence for the conformity effect of ELGs. Building upon the original subhalo abundance-matching (SHAM) method developed by Gao et al., we propose a concise conformity model to improve the ELG–halo connection. In this model, the number of satellite ELGs is boosted by a factor of ∼5 in the halos whose central galaxies are ELGs. We show that the mean ELG satellite number in such central halos is still smaller than 1 and that the model does not significantly increase the overall satellite fraction. With this model, we can well recover the ELG auto correlations to the smallest scales explored with the current data (i.e., r
p > 0.03 Mpc h
−1 in real space and at s > 0.3 Mpc h
−1 in redshift space), while the cross correlations between luminous red galaxies and ELGs are nearly unchanged. Although our SHAM model has only eight parameters, we further verify that it can accurately describe the ELG clustering in the entire redshift range from z = 0.8 to 1.6. We therefore expect that this method can be used to generate high-quality ELG lightcone mocks for DESI.
The Extended [C ii] under Construction? Observation of the Brightest High-z Lensed Star-forming Galaxy at z = 6.2
Authors: Fudamoto Yoshinobu , Inoue Akio K. , Coe Dan , Welch Brian , Acebron Ana , Ricotti Massimo , Mandelker Nir , Windhorst Rogier A. , Xu Xinfeng , Sugahara Yuma , Bauer Franz E. , Bradač Maruša , Bradley Larry D. , Diego Jose M. , Florian Michael , Frye Brenda , Fujimoto Seiji , Hashimoto Takuya , Henry Alaina , Mahler Guillaume , Oesch Pascal A. , Ravindranath Swara , Rigby Jane , Sharon Keren , Strait Victoria , Tamura Yoichi , Trenti Michele , Vanzella Eros , Zackrisson Erik , Zitrin Adi
Published: January 2024

We present results of [C ii] 158 μm emission line observations, and report the spectroscopic redshift confirmation of a strongly lensed (μ ∼ 20) star-forming galaxy, MACS0308-zD1 at z = 6.2078 ± 0.0002. The [C ii] emission line is detected with a signal-to-noise ratio >6 within the rest-frame UV-bright clump of the lensed galaxy (zD1.1) and exhibits multiple velocity components; the narrow [C ii] has a velocity full width half maximum (FWHM) of 110 ± 20 km s−1, while broader [C ii] is seen with an FWHM of 230 ± 50 km s−1. The broader [C ii] component is blueshifted (−80 ± 20 km s−1) with respect to the narrow [C ii] component, and has a morphology that extends beyond the UV-bright clump. We find that, while the narrow [C ii] emission is most likely associated with zD1.1, the broader component is possibly associated with a physically distinct gas component from zD1.1 (e.g., outflowing or inflowing gas). Based on the nondetection of λ
158μm dust continuum, we find that MACS0308-zD1's star formation activity occurs in a dust-free environment indicated by a strong upper limit of infrared luminosity ≲9 × 108
L
⊙. Targeting this strongly lensed faint galaxy for follow-up Atacama Large Millimeter/submillimeter Array and JWST observations will be crucial to characterize the details of typical galaxy growth in the early Universe.
A Morphokinematic Study of the Enigmatic Emission Nebula NGC 6164/5 Surrounding the Magnetic O-type Star HD 148937
Authors: Lim Beomdu , Nazé Yaël , Chang Seok-Jun , Hutsemékers Damien
Published: January 2024

HD 148937 is a peculiar massive star (Of?p) with a strong magnetic field (1 kG). The hourglass-shaped emission nebula NGC 6164/5 surrounds this star. This nebula is presumed to originate from episodic mass-loss events of the central O-type star, but the detailed formation mechanism is not yet well understood. Grasping its three-dimensional structure is essential to uncovering the origin of this nebula. Here we report the high-resolution multiobject spectroscopic observations of NGC 6164/5 using the GIRAFFE on the 8.2 m Very Large Telescope. Integrated intensity maps constructed from several spectral lines delineate well the overall shape of this nebula, such as the two bright lobes and the inner gas region. The position–velocity diagrams show that the two bright lobes are found to be redshifted and blueshifted, respectively, while the inner region has multiple layers. We consider a geometric model composed of a bilateral outflow harboring nitrogen-enriched knots and expanding inner shells. Its spectral features are then simulated by using a Monte Carlo radiative transfer technique for different sets of velocities. Some position–velocity diagrams from simulations are very similar to the observed ones. According to the model that best reproduces the observational data, the two bright lobes and the nitrogen-enriched knots are moving away from HD 148937 at about 120 km s−1. Their minimum kinematic age is estimated to be about 7500 yr. We discuss possible formation mechanisms of this nebula in the context of binary interaction.
The Once-canceled Habitable-zone Super-Earth Gliese 581d Might Indeed Exist!
Authors: Cuntz Manfred , Engle Scott G. , Guinan Edward F.
Published: January 2024

Recent studies indicate that Gliese 581d, a proposed habitable zone (HZ) super-Earth planet, does not exist, as the respective data denote that the planet is an artifact of stellar activity. Here we report evidence to the contrary considering that those studies were based on inaccurate spectroscopic measurements of the stellar rotation period regarding the planet’s inactive host star (dM3). Gliese 581d, if real, is of particular interest as it constitutes the first planet identified to be in a stellar HZ outside of the solar system based on studies in 2007. If confirmed as a true planet, at 20.5 lt-yr, it would also be one of the nearest potentially habitable super-Earths.
A new species of Brachycephalus (Anura: Brachycephalidae) from the northern portion of the state of Rio de Janeiro, southeastern Brazil
Authors: Folly Manuella , Condez Thais H. , Vrcibradic Davor , Rocha Carlos F. D. , Machado Alessandra S. , Lopes Ricardo T. , Pombal Jr. José P.
Published: January 2024

Abstract

Brachycephalus is a genus of small ground-dwelling anurans, endemic to the Brazilian Atlantic Forest. Recent molecular analyses have corroborated the monophyly of three species groups within this genus (B. ephippium, B. ephippium, and B. ephippium). In the meantime, the genus has been targeted as a group with recent taxonomic issues owing to its interspecific morphological similarity and genetic conservatism. Herein, we describe a new species of Brachycephalus from the northern portion of Serra do Mar mountain range, in the state of Rio de Janeiro, Brazil. It belongs to the B. ephippium species group, exhibiting moderate hyperossification of the skull and vertebral column. The new species can be distinguished from all other congeners based on morphological, acoustic, and molecular data. Furthermore, we provide information on osteology and natural history of the new species.
Nonlinear modeling and interior point algorithm for the material flow optimization in petroleum refinery
Authors: Dong Fenglian , Ge Dongdong , Yang Lei , Wei Zhiwei , Guo Sichen , Xu Hekai
Published: January 2024

This paper established a mathematical model with nonconvex bilinear terms. It formulated the complex material flow in the petroleum refinery scenario based on the concept of the "P model". The mathematical model described the nonlinear constraints such as linear and nonlinear mass and volume intersection flow blending of crude and middle material physical properties. Additionally, it described the complex inflow and outflow in secondary devices as nonlinear constraints such as delta-base structure and physical property transfer. It is highly difficult to determine the direction and quantity of each material in the network of refineries. An improved interior point algorithm with an initial point strategy was proposed to find a high-quality feasible solution in a short time. The real instances from the petroleum refinery were employed to compare and analyze the solutions from the improved algorithm and commercial solver. The experimental results show that the proposed algorithm framework can balance the solution quality and computational efficiency and perform well in different scenarios of refinery material flow networks.
Fiscal policy promotes corporate green credit: Experience from the construction of energy conservation and emission reduction demonstration cities in China
Authors: Cheng Yangyang , Xu Zhenhuan
Published: January 2024

Using a quasi-natural experiment of the staggered construction of energy conservation and emission reduction (ECER) demonstration cities in China, this paper explores the impact of fiscal policy on green credit (GC) for listed enterprises. The main findings are the following: (1) The ECER demonstration cities policy significantly improves enterprise GC. This conclusion remains robust after considering the heterogeneous treatment effects. (2) By extending the estimation period beyond the policy withdrawal, we use the difference-in-differences designs with multiple groups and periods (DIDM) estimator to compute the average treatment effect of policy switches. The results show that the intervention effect still exists after the policy withdrawal. (3) Direct cash subsidies, corporate green spending, and external financing constraints are the main mechanisms through which the ECER demonstration cities policy works. (4) The effects of the ECER demonstration cities policy are heterogeneous at the batch, urban, industry, and corporate levels. This paper explores the role of fiscal policy on enterprise green financing. The findings provide theoretical and empirical insights for leveraging fiscal tools to enhance environmental governance.
Comment s’approcher des sources paradisiaques du Nil. L’exploration de Ḥāʾid ibn Abī Sālūm
Authors: Ducène Jean-Charles
Published: January 2024

L’histoire de la découverte de la source paradisiaque du Nil par Ḥāʾid ibn Abī Sālūm apparaît au milieu du xe siècle dans la littérature arabe. Ses éléments narratifs la rapprochent des Qiṣaṣ al‑anbiyāʾ ou « Histoires des prophètes » puisque le narré du conte comble un vide de la tradition qui associe parfois le Nil d’Égypte avec le Paradis. Cette association est ici confirmée par un descendant d’Ésaü, mais elle se dédouble d’une aventure merveilleuse à valeur morale.
À l’encre du Nil. Le Fayḍ al‑madīd fī aḫbār al‑Nīl al‑saʿīd d’Ibn ʿAbd al‑Salām al‑Manūfī (m. 927/1521 ou 931/1524‑1525)
Authors: Seignobos Robin
Published: January 2024

Dès les ixe-xe siècles, le Nil est célébré dans la littérature égyptienne d’expression arabe comme la plus remarquable des innombrables merveilles de l’Égypte. Il faut pourtant attendre l’époque mamelouke pour que se multiplient les traités spécifiquement consacrés au « fleuve béni », formant alors un sous-genre autonome dérivé de la tradition des « mérites supérieurs de l’Égypte » (faḍāʾil Miṣr). Malgré l’attention ponctuelle et limitée que leur a accordée la recherche moderne, cette étude plaide en faveur d’une exploration plus attentive de ce corpus en prenant pour cas d’étude l’un des témoins les plus tardifs de cette tradition : le Fayḍ al‑madīd fī aḫbār al‑Nīl al‑saʿīd d’Ibn ʿAbd al‑Salām al‑Manūfī (m. 927/1521 ou 931/1524‑1525). Après avoir rassemblé les informations dont nous disposons sur la vie et l’œuvre de ce savant méconnu, ce travail entend poser les premiers jalons d’une étude approfondie de ce traité. Nous aborderons d’abord la question des manuscrits et de la chronologie de rédaction de l’œuvre avant de livrer un aperçu d’ensemble de sa structure et de son contenu. Nous nous intéresserons enfin à la méthode de travail de l’auteur à partir de l’analyse d’un échantillon d’extraits révélateurs de l’ambivalence de son positionnement vis‑à‑vis des « autorités » qu'il convoque.
L’approche archéologique des vêtements et textiles préhistoriques. Enjeux et limites
Authors: Cheval Carole
Published: January 2024

La rareté des vestiges textiles ainsi que le manque d’autres sources iconographiques ou textuelles nous invitent à étudier ceux-ci par le biais des outils qui ont participé à leur confection. Ces derniers, par leur place dans la chaîne opératoire, nous apportent des informations différentes et complémentaires. Ils sont souvent étudiés sous un angle typologique, et leur analyse techno-fonctionnelle est plus récente. C’est notamment le cas de la fusaïole et du peson de métier à tisser vertical, emblématiques des techniques textiles de l’Europe protohistorique, dont la variété, du point de vue tant des matériaux que des formes, témoigne de pratiques variables, dépassant souvent le cadre chronoculturel. À travers une approche expérimentale et tracéologique de ces outils ainsi que de la lame de tissage, la compréhension des variétés morphologiques des pesons et l’identification d’activité textile en l’absence de fusaïole ou de peson sont des exemples des multiples informations qu’apporte cette approche.
Interprétation possible des fosses à pesons. Le métier à tisser de l’habitat du second âge du Fer d’Aron (Mayenne)
Authors: Mare Éric , Médard Fabienne
Published: January 2024

Le site du second âge du Fer de la Conillère à Aron (Mayenne) a livré un ensemble de structures permettant de considérer la présence d’un atelier de tissage. Les informations recueillies permettent une réflexion sur la disposition d’un métier à cette période et de considérer celui-ci comme étant sur poteaux « plantés », donc strictement vertical plutôt qu’appuyé contre un mur comme il est habituellement supposé.
Restes textiles et pièces vestimentaires en contexte funéraire. Les cercueils en plomb de la rue Guynemer à Nîmes (IIe-IVe s.)
Authors: Desplanques Elsa , Grimaud Julie , Rochette Marie , Thomas Benjamin
Published: January 2024

La fouille réalisée au 1 rue Guynemer à Nîmes a livré une quarantaine de tombes à inhumation datées entre le IIe et le IVe siècle, réparties sur les 330 m² étudiés. Réparties au sein de six concessions, elles sont pour la plupart constituées d’un contenant en bois, en tuiles ou en pierres installé dans une fosse. Certaines se distinguent par l’emploi de cercueils en plomb déposés dans des fosses ou dans des tombes auxquelles on accède par un puits vertical et dont les parois sont flanquées d’une à deux niches latérales. L’usage du plomb a favorisé la conservation de nombreux restes textiles. Ainsi, dans quatre cercueils en plomb parmi les huit mis au jour, environ 250 fragments textiles ont été retrouvés. Il s’agit de tissus variés qui se distinguent par les matériaux utilisés, les armures, la présence de franges, etc. Ils rendent compte de la présence de textiles dans la tombe, peut-être portés par le défunt, déposés près de lui à l’instar de chaussures en cuir ou bien utilisés dans l’aménagement de la sépulture (coussins, litières).
Le travail du cuir et du textile au premier Moyen Âge. Les mobiliers des habitats et de la nécropole des sites de Prény (Meurthe-et-Moselle)
Authors: Frauciel Marie , Verdelet Franck
Published: January 2024

À Prény (Meurthe-et-Moselle), les sites d’habitat de Tautecourt et Frichamp ainsi que la nécropole de Bois Lasseau, tous trois occupés durant la période mérovingienne et une partie de la période carolingienne, ont livré de nombreux objets et outils liés au travail du cuir et du textile. La confrontation entre les objets et outils issus des dépotoirs des deux sites d’habitat avec ceux déposés dans les tombes révèle l’importance de ces activités à Prény. Sur les sites d’habitat, les témoignages des activités liées à la production de biens en cuir et textiles se répartissent de manière homogène dans la plupart des cabanes excavées, avec quelques assemblages et concentrations permettant d’identifier des ateliers potentiels. Des disparités chronologiques apparaissent également pour certains types d’outil. Dans la nécropole, une sélection d’outils s’opère, parfois liée au sexe ou à la qualité du défunt.
La préparation des fibres de laine. Des réchauds de cardeur du XVIe siècle à Marly-la-Ville (Val-d’Oise)
Authors: Renel François , Alligri Aurélia
Published: January 2024

Associé au travail de la laine, un type de vase original a été mis au jour au cours de deux opérations d’archéologie préventive menées récemment sur la commune de Marly-la-Ville (Renel 2023a et b). Ces vases, à la physionomie originale et inédits en contexte de consommation francilien, apportent un éclairage particulier sur l’une des activités pratiquées sur le site, réalisée en complément de l’économie agro-pastorale. Identifiés comme étant des réchauds de cardeur et qualifiés de « céramiques à usage artisanal et technique », ils sont associés à l’industrie textile. Ils prennent ainsi part à la chaine opératoire de transformation de la laine, leur usage étant requis lors de la phase du peignage qui a pour finalité de démêler les fibres.