bluuebunny/crossref_metadata_2025_split huggingface dataset:
Metrology of frequency comb sources: assessing the coherence, from multimode to mode-locked operation
Authors: Eramo Roberto , Sorgi Alessia , Gabbrielli Tecla , Insero Giacomo , Cappelli Francesco , Consolino Luigi , De Natale Paolo 
Published: March 2024

Abstract
Since the beginning of this millennium, frequency comb generators have reshaped frequency metrology and related areas. After more than two decades since their first realization, several other ways to generate frequency combs, in any spectral region, have been demonstrated, each way with its peculiar features. This trend has triggered the need to quantitatively assess how close the new comb realizations are to an ideal comb, a feature that will be called combness throughout this paper. We will briefly review the very dynamic area of novel frequency comb sources and we will describe the techniques that have been recently developed to quantitatively assess the key parameters of old and new frequency combs, in view of the specific applications. Finally, we will try to sketch future steps in this recently born research area.
Microstructure and chloride transport of aeolian sand concrete under long-term natural immersion
Authors: Dong Wei , Sun AnQi , Zhou Menghu 
Published: March 2024

Abstract
River sand was consumed in large quantities, and alternatives to river sand were urgently needed. There are a large number of natural resources of aeolian sand in western China. Aeolian sand was prepared into aeolian sand concrete (ASC). It can greatly reduce the consumption of river sand and inhibit the process of desertification to protect the environment. ASC is a new type of concrete material prepared by using aeolian sand as fine aggregate. To clarify the chloride ion transport behaviour in the ASC under long-term natural immersion, the aeolian sand was 100% substituted for the river sand to prepare the full ASC with three water–binder ratios. The ASC was naturally immersed in 3 and 6% NaCl solutions for a long time, and nuclear magnetic resonance and microscopic scanning electron microscopy techniques were used. The change rule of chloride ion content at different depths of the ASC was studied, and its microstructure characteristics under different erosion times were analysed. The results showed that the free chloride ion concentration at different depths of the ASC increased with increasing water–binder ratio, immersion time, and chloride concentration. After soaking in the salt solution, the hydration products in the ASC reacted with chloride ions to form Friedel salt, which filled the internal pores and microcracks of the ASC, improved its interface transition zone structure, and increased the compactness of the test piece. The porosity of the three groups of ASC with different water–binder ratios decreased by 0.95, 1.03, and 1.15% after soaking in 6% salt solution for 12 m. To study the diffusion law of chloride ions in ASC, combined with influencing factors such as temperature, humidity, D value, deterioration effect and chloride ion combination, Fick’s second law was modified, and a chloride ion diffusion model of ASC with high accuracy was established, with a fitting correlation number above 0.93, which provided a reference for the research and application of ASC in saline areas.
The face of Eurydice
Authors: Mastrocinque Attilio 
Published: March 2024

AbstractEurydice could not come back to this world because Orpheus looked back at her. Persephone had forbidden this, but Orpheus disobeyed. Is there a logic for such a rule? A relief in the Archaeological Museum in Naples shows Orpheus looking at his wife after having removed a veil from her face, and the face of dead persons was a sensible element in ancient funerary art. We find two forms of hiding their face: by veiling it or by depicting the person but not the face, by leaving it unwrought. Euripides and several Roman sarcophagi depict Alcestis with her head veiled after her return to the house of her husband. On the other hand, some funerary busts from the necropolis of Cyrene show deceased women with their face flat and many sarcophagi of the Roman period are completely sculptured except the face of the buried person. The current explanation based on an untimely death cannot explain the large number of such cases; it would have been absurd to wait for the death of the customer before carving his or her portrait. There was a religious rule forbidding the vision of the face of dead persons, but it is impossible to ascertain what kind of people abided by this law and what religious stream forbade this.
NİĞDE MİLLETVEKİLİ HASAN HAYATİ ÜLKÜN’ÜN MECLİS ÇALIŞMALARI
Authors: AKGÜMÜŞ Murat 
Published: March 2024

ÖZ
Türkiye, 14 Mayıs 1950 Genel Seçimlerinden sonra çok partili sisteme geçmiştir. Demokrat Parti, 1954 ve 1957’de yapılan seçimleri kazanarak on yıl boyunca iktidarda kalmıştır. Demokrat Parti, 1950, 1954 ve 1957 yıllarında yapılan seçimlerde hemen hemen her ilden milletvekili çıkarmıştır. Demokrat Parti, ülke genelinde olduğu gibi Niğde’de de aynı başarıyı göstererek, 1950 ve 1954 seçimlerinde Niğde milletvekillerinin tamamını kazanmıştır. Hasan Hayati Ülkün, 1954 seçimlerinde Demokrat Parti’den Niğde Milletvekili seçilen milletvekilleri arasında yer almıştır. Hasan H. Ülkün, 1954-1957 yılları arasında Niğde Milletvekili olarak TBMM’de görev yapmıştır. 1957 yılı seçimlerinde Nevşehir Milletvekili olarak seçilen Hasan H. Ülkün, yeniden Türkiye Büyük Millet Meclisi’nde görev yapmıştır.
Hasan H. Ülkün, Niğde Milletvekili iken Türkiye Büyük Millet Meclisi Adalet Komisyonu Üyeliği ve Kütüphane Komisyonu Üyeliği görevlerinde bulunmuştur. Hasan H. Ülkün, milleti ve ülkesi adına üzerine düşen görev ve sorumlulukları yerine getirmeye özen göstermiştir. Hasan H. Ülkün ülkenin yerel ve ulusal sorunlarını, halkın şikâyet ve taleplerini Meclis gündemine taşıyarak çözüm bulunması için çaba harcamıştır. Hasan H. Ülkün; Türkiye Büyük Millet Meclisi’nde Bayındırlık, Eğitim, Ekonomi, Tarım ve Sağlık gibi konularda söz almış, soru önergeleri vermiş ve kanun teklifleri sunmuştur.
Niğde milletvekilleri arasından yapılan inceleme ve araştırmalar sonucunda Hasan H. Ülkün’ün Niğde Milletvekili olduğu dönemde Meclis’te yoğun bir faaliyet gösterdiği görülmüştür. Bu nedenle bu çalışma hem Hasan H. Ülkün’ü örnek göstermek, hem de Niğde Milletvekili olarak yaptığı çalışmaları ortaya koymak amacıyla hazırlanmıştır. Bu araştırma makalesinde öncelikle Hasan H. Ülkün’ün hayatına değinilmiş, ardından Meclis faaliyetleri ele alınmış ve son olarak genel bir değerlendirme yapılmıştır. Bu çalışmada Hasan H. Ülkün’ün Meclis çalışmaları kronolojik sıraya uygun olarak verilmiştir. Doküman analiz yönteminin kullanıldığı bu çalışmada akademik çalışmalar, arşiv kaynakları ve TBMM tutanakları değerlendirilmiştir.
Nonlinear Model Predictive Control-based Collision Avoidance for Mobile Robot
Authors: Ismael Omar Y. , Almaged Mohammed , Abdulla Abdulla Ibrahim 
Published: March 2024

This work proposes an efficient and safe single-layer Nonlinear Model Predictive Control (NMPC) system based on LiDAR to solve the problem of autonomous navigation in cluttered environments with previously unidentified static and dynamic obstacles of any shape. Initially, LiDAR sensor data is collected. Then, the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm, is used to cluster the (Lidar) points that belong to each obstacle together. Moreover, a Minimum Euclidean Distance (MED) between the robot and each obstacle with the aid of a safety margin is utilized to implement safety-critical obstacle avoidance rather than existing methods in the literature that depend on enclosing the obstacles with a circle or minimum bounding ellipse. After that, to impose avoidance constraints with feasibility guarantees and without compromising stability, an NMPC for set-point stabilization is taken into consideration with a design strategy based on terminal inequality and equality constraints. Consequently, numerous obstacles can be avoided at the same time efficiently and rapidly through unstructured environments with narrow corridors. Finally, a case study with an omnidirectional wheeled mobile robot (OWMR) is presented to assess the proposed NMPC formulation for set-point stabilization. Furthermore, the efficacy of the proposed system is tested by experiments in simulated scenarios using a robot simulator named CoppeliaSim in combination with MATLAB which utilizes the CasADi Toolbox, and Statistics and Machine Learning Toolbox. Two simulation scenarios are considered to show the performance of the proposed framework. The first scenario considers only static obstacles while the second scenario is more challenging and contains static and dynamic obstacles. In both scenarios, the OWMR successfully reached the target pose (1.5m, 1.5m, 0°) with a small deviation. Four performance indices are utilized to evaluate the set-point stabilization performance of the proposed control framework including the steady-state error in the posture vector which is less than 0.02 meters for position and 0.012 for orientation, and the integral of norm squared actual control inputs which is 19.96 and 21.74 for the first and second scenarios respectively. The proposed control framework shows a positive performance in a narrow-cluttered environment with unknown obstacles.
A clinicoepidemiological study of leprosy among children and adolescents in a tertiary care centre in the post elimination era
Authors: C Durgavathi , S Hariharasudhan , R Priyavathani Annie Malathy , Daniel Samuel Jeyaraj , V Sampath 
Published: March 2024

Leprosy amongst younger age indicates active foci of transmission in the community. Our aim is to analyse the epidemiological profile, clinical spectrum, reactions and deformities of leprosy among children and adolescents. This is a prospective observational study conducted on all newly diagnosed leprosy patients under the age of 19 years for one year. Of 113 newly diagnosed leprosy cases, 38 patients were under 19 years of age. Male-female ratio was 5.3:1. Mean age was 16.6 years. Borderline tuberculoid (BT) was the most common type followed by borderline lepromatous (BL) and Indeterminate (I) leprosy most common manifestation was hypopigmented anaesthetic skin lesion over exposed parts. 79% had multiple nerve trunk involvement of which ulnar nerve was the most common. Reaction and deformity were found to be in 21% and 18.3%. Both were seen only in multibacillary cases and predominantly in 15-19years of age. Risk factors for reactions were male sex, increasing age, labourers, borderline spectrum, skin lesion involving the nerve trunk, multiple nerve involvement and smear positivity. Risk factors for deformities were migrants in lower socio-economic status, increased duration of active disease and delayed diagnosis. Leprosy, a disease of long incubation period, among adolescents may indicate missed cases of childhood leprosy. Training through integrated service in early diagnosis and its complication, introduction of an exclusive type of treatment (MB MDT) for all categories for a shortened duration and newer drugs for reactions, sustained commitment to follow-up care and health education among community is a need at this post elimination era.
A clinical study of Geriatric dermatoses at Tertiary care center in South India
Authors: C Lalitha , Prasad Anupama Manohar , Babu Aneeha Ramesh 
Published: March 2024

Geriatric health care has become a worldwide concern as advance in medical science has contributed to increase in average life span of an individual. Cutaneous dermatoses constitute one of the major comorbidities of elderly. To determine the prevalence of various skin conditions in elderly patients. A Total of 200 patients aged 60 and above attending Dermatology OPD at tertiary care centre for a period of six months from March to August were assessed for cutaneous dermatosis, routine investigations and histopathological examination done for relevant cases. Out of 200 patients included in study group 128 were males (64%) and 72females (36%), majority were in age group of 65 to70 yrs. All patients recruited were from rural area. wrinkling was seen in &#62;95% of cases , Generalized pruritus and xerosis was seen in 56patient(28%) and 85 patients(42.5%) respectively, eczematous skin condition seen in 41 patients(21%)and psoriasis in 17 patients(8.5%) fissure foot in 15(7.5%) patients .Fungal infection is the most common infection noted(7.5% ) followed by viral infection herpes zoster and post herpetic neuralgia ( 4%), pyoderma (3.5%) and scabies(2.5% ).Benign tumors like acrochordons, Dermatosis Papulosis nigra and seborrheic keratosis seen in 28% of cases. Nails changes was seen in 45% of patients. The increasing prevalence of skin condition in elderly especially ruritus and eczema, emphasizes the importance of health education regarding skin care concerning appropriate use of emollients, foot care, proper hygiene, sun protection and for early diagnosis and management of the same, such that the process of senescence allowed to live hail and healthy.
Analysis and Modeling of the Dynamics of Neutralized and Disposed of Industrial Production and Consumption Waste
Authors: Bogatyrev V.D. , Rostova E.P. 
Published: March 2024

The issues of modeling neutralized and disposed of waste from production and consumption of industrial production facilities are considered. The types of economic activities related to industrial production are considered: mining, manufacturing, supply of electricity, gas and steam;air conditioning. For these types of economic activity, statistical data on the volume of shipped products of own production, the volume of generated production and consumption waste, disposed and neutralized waste, and current environmental protection costs were analyzed. The general trends inherent in all types of economic activity under consideration, as well as the characteristic features of each of them, are revealed. Regression multifactorial models have been developed that reflect the impact of production volume and environmental protection costs on the amount of non-neutralized and non-utilized production waste.
Los estados financieros y la información financiera en el gobierno de la sociedad anónima
Authors: Tabra Ochoa Edison , Sandoval Navarro Diana 
Published: March 2024

El presente artículo tiene como propósito ofrecer un estudio de las nociones de ‘información financiera’ y ‘estados financieros’ desde una perspectiva principalmente legal y contable societaria. Incluye sus conceptos, características y utilidad en la labor de los órganos de gobierno de una sociedad anónima.Sus resultados se materializan en una serie de propuestas o sugerencias que los órganos de gobierno podrían establecer en el estatuto de constitución de la sociedad o al momento de plantear una modificación. Con esto se resalta la necesidad de integrar la visión contable con la jurídica al momento de adoptar decisiones por parte de los accionistas, miembros del directorio o gerencia.
Las medidas de autotutela frente a amenazas cibernéticas en derecho internacional
Authors: Piernas López Juan Jorge 
Published: March 2024

Este artículo analiza las medidas que pueden adoptar legítimamente los sujetos de Derecho internacional para responder ante actividades cibernéticas maliciosas. En particular, el artículo analiza las principales medidas de autotutela previstas por el Derecho internacional, a saber, la retorsión, las contramedidas y la legítima defensa en respuesta a ciberataques. Con este fin, se estudia en primer lugar el estado de la cuestión relativo a la retorsión en este ámbito. En segundo lugar, se aborda la cuestión de las contramedidas, con especial referencia a la Posibilidad de adoptar contramedidas colectivas a la luz de posicionamientos recientes de Estados y de algunas instituciones y órganos de la Unión Europea. En tercer lugar, se estudia la posibilidad de actuar en legítima defensa en respuesta a un ciberataque. Finalmente se incluyen una serie de consideraciones a modo de conclusión.
J.M. Beneyto y C. Jiménez Piernas (Dirs.). Concepto y fuentes del Derecho internacional - J.M. Beneyto y C. Jiménez Piernas (Dirs.) y S. Galimberti Díaz-Faes (Coord.). Derecho de los tratados
Authors: Calvo Caravaca Alfonso-Luis 
Published: March 2024

Este artículo reseña:
J.M. Beneyto y C. Jiménez Piernas (Dirs.). Concepto y fuentes del Derecho internacional. Tirant, Valencia, 2022, 687 pp. ISBN 978-84-1113-061-5 y J.M. Beneyto y C. Jiménez Piernas (Dirs.) y S. Galimberti Díaz-Faes (Coord.). Derecho de los tratados. Tirant, Valencia, 2023, 675 pp. ISBN 978-84-1197-542-1
M.A. Cebrián Salvat. La notificación internacional en materia civil y mercantil en la Unión Europea
Authors: Calvo Caravaca Alfonso-Luis 
Published: March 2024

Este artículo reseña:
M.A. Cebrián Salvat. La notificación internacional en materia civil y mercantil en la Unión Europea. Granada, Editorial Comares, 2018. ISBN: 9788490456439
I. Antón Juárez (directora). Cuestiones actuales del Derecho de la moda.
Authors: García Vidal Ángel 
Published: March 2024

Este artículo reseña:
I. Antón Juárez (directora). Cuestiones actuales del Derecho de la moda. Aranzadi, Cizur Menor, 2023. ISBN: 9788411634649.
A. Durán Ayago. Derechos humanos y método de reconocimiento de situaciones jurídicas: Hacia la libre circulación de personas y familias. Perspectiva internacional y europea.
Authors: Hernández Rodríguez Aurora 
Published: March 2024

Este artículo reseña:
A. Durán Ayago. Derechos humanos y método de reconocimiento de situaciones jurídicas: Hacia la libre circulación de personas y familias. Perspectiva internacional y europea. Aranzadi, Cizur Menor, 2023, 208 pp. ISBN: 978.84-1162-106-9
A Method for Detection of Methane Leaks from Idle and Orphaned Wells Using High-Precision Sensor and a Ventilation Canopy
Authors: Daneshvarjejad Nima , Khodaparast Pooya , Cho Young , Paul Donald , Farhadi Shahram , Ershaghi Iraj 
Published: March 2024

Abstract
A framework for monitoring and detecting methane emissions from point sources with IOT capability, especially in abandoned wells, is essential to address environmental concerns about reducing greenhouse gases. Our novel design can monitor emissions from abandoned and poorly sealed oil and gas wells in real time, factoring in environmental variables such as weather, moisture, and wind conditions.
The research presented in this paper is based on data from extensive experimental work using the point source emission of pure methane. To simulate the process, we measured methane emissions using a specially designed canopy enclosing the gas release point with the state-of-the-art sensor that can detect ultra-low leak rates of methane released from a controlled source. The novel canopy system was constructed to mount the sensor and to minimize wind and meteorological effects. Numerous field tests using wide-scale land surfaces were performed to optimize the design parameters of the canopy system. A wind sensor was incorporated into the framework to examine the wind's local, real-time effect on detected concentration and leak rates.
Using the unique arrangement of our combined canopy, barrier, and local wind sensor system, we can successfully detect and monitor methane emissions from abandoned wells at rates nearing one gram per hour, which is not detectable with previously available technologies. The effect of wind is minimized while allowing for natural ventilation and notifying operators of asset integrity in real-time. This solution decreases costs, and offers scalability, and remote sensing ability.
Adapting Corporate Strategies for Energy Transition: A Case Study on Production Liability Management
Authors: Orozco E. , Caro W. 
Published: March 2024

Summary
This article analyzes what effects a transition from hydrocarbon investments to renewable alternatives may have on Well Integrity, identifying how organizational changes are required to maintain regulatory compliance and the management of legal and financial responsibilities associated with the production of oil and natural gas., the correct management of risks associated with assets in production and the mitigation of environmental impacts.
It is determined through an analysis from the point of view of market margins, incentives, advantages and disadvantages in which O&G organizational area between upstream, midstream and downstream the management functions of investments in renewable alternative energies should focus.
Characterization of Wormhole Growth and Propagation Dynamics During CHOPS Processes by Integrating Rate Transient Analysis and a Pressure-Gradient-Based Sand Failure Criterion in the Presence of Foamy Oil Flow
Authors: Jiang Liwu , Liu Jinju , Liu Tongjing , Yang Daoyong 
Published: March 2024

Abstract
Characterization of the wormhole growth and propagation dynamics has been made possible with the semi-analytical models developed in this work by integrating both rate transient analysis (RTA) and a pressure-gradient-based (PGB) sand failure criterion in the presence of foamy oil flow. As for the theoretical RTA models incorporated with a PGB sand failure criterion and foamy oil properties, the nonlinearity caused by the latter is linearized by using the pseudofunctions. A sequential method is adopted to solve the coupling fluid-solid problem, while the source function and finite difference methods are applied to obtain the solutions for fluid flow in the matrix and wormhole subsystems, respectively. New wormhole segments can be generated once the PGB sand failure criterion has been achieved, while their updated petrophysical properties conditioned to the new pressure field can be sent back to obtain the solutions for the fluid flow in the next time interval. Furthermore, influence of sand failure/fluidizing and foamy oil properties on the dynamic wormhole network can be investigated with the generated type curves. Both wormhole growth and foamy oil flow dictate an upward fluid production at the early times, while the production-induced pressure depletion dominates the declining production at the late times. The fractal wormhole networks can be dynamically characterized by history matching the field fluid and sand production profiles. Both the sand failure degree and foamy oil properties dictate the effective wormhole coverage and intensity. Sand production is found to be influenced by both the breakdown pressure gradient and wormhole conductivities, while oil production rate can be dominated by the wormhole coverage and intensity. Foamy oil flow can increase oil production rate and increase the wormhole coverage compared with the conventional oil. The newly developed method in this work has been validated and then applied in field-scale to dynamically characterize the wormhole growth and propagation by considering both sand failure phenomenon and foamy oil properties within a unified, consistent, and accurate framework. In this work, a rigorously semi-analytical method has been proposed to dynamically characterize the wormhole growth and propagation for the first time by incorporating the RTA, PGB sand failure criterion, and foamy oil properties. Compared to the conventional numerical simulations, not only is this proposed method accurate for wormhole characterization conditioned to fluid and sand production profiles, but also such delineated wormholes can be readily integrated with any reservoir numerical simulators to assess and optimize any potential EOR methods in post-CHOPS reservoirs.