bluuebunny/crossref_metadata_2025_split huggingface dataset:
An experimental analysis on sliding wear characteristics of TIG-welded Al6061 reinforced with SiC
Authors: P. K. Jayashree , B. R. N. Murthy , Hiremath Anupama , Giri Jayant , Alotaibi Rajeh , T. Sathish , Laxmi Bhagya 
Published: June 2024

In this paper, metal matrix composites of Al6061 strengthened with 6 wt. % SiC were produced by stir casting and further subjected to the Tungsten Inert Gas (TIG) welding fabrication process using ER5356 as the filler material. The effect of TIG welding on hardness and wear resistance was studied by varying current at 150, 170, and 200 A. Samples of cast composite as per ASTM standards were prepared. Hardness tests on TIG-welded composite were carried out on the base, heat-affected, and weld zones. The test results showed higher hardness with an increase in welding current. Sliding wear properties were explored using the pin-on-disc machine. The wear rate and weight loss decreased as the welding current increased. The surface morphological images obtained through SEM indicated that the wear in the non-welded specimen was due to abrasion and delamination, whereas that of the welded specimen showed a reduced delamination and lower wear rate.
Chemical and biological attributes of soil and soybean (Glycine max) yield in integrated systems in the Cerrado of north-east Brazil
Authors: Silva Alcilane Arnaldo , Lacerda Julian Junio de Jesus , Carvalho Suzane Pereira , Ferreira Rubens de Sá , Brito Ramilos Rodrigues de , Vogado Renato Falconeres , Araújo Neto Raimundo Bezerra de , Sagrilo Edvaldo , Cavigelli Michel André , Souza Henrique Antunes de 
Published: June 2024

Context Cultivation of forage grasses intercropped with maize (Zea mays) improves soil quality and yield of subsequent crops. However, for the Cerrado of north-east Brazil, little is known about the effects of this practice on soil chemical and biological attributes and on succeeding soybean crop’s yield and nutrition. Aims This study aimed to evaluate the influence of intercropping maize with forage grasses on soil chemical and biological properties and on the nutritional status and yield of succeeding soybean in the Cerrado of Piauí, Brazil. Methods In the 2016/2017 cropping season, maize (M) was grown in monoculture and intercropped with Megathyrsus maximus cvs Zuri, Massai, Tanzania, and Tamani; Urochloa brizantha cv. Marandu, and Urochloa ruziziensis cv. Ruziziensis. In the 2017/2018 and 2018/2019 cropping seasons, soybean (Glycine max) was grown on the same plots. Key results In the 2017/2018 cropping season, highest soil K concentrations in the 0–0.1 m depth were observed following M + Zuri and M + Massai. In the 2018/2019 cropping season, soybean grown after monoculture maize, M + Zuri, M + Tanzania and M + Ruziziensis promoted the highest soil basal respiration. Intercropping maize with forage grasses of the genus Urochloa increased the soil humic substances and carbon concentrations. The M + Tanzania treatment increased soybean leaf P and K concentrations in the 2017/2018 cropping season. Conclusions Intercropping maize with forage grasses improved soil fertility and increased cumulative soybean grain yield by 15%. Implications Maize intercropped with forage grasses, especially of the genus Urochloa, increases humic fractions and total soil organic carbon, and is thus a feasible agricultural management.
German nominal number interpretation in an impaired mental lexicon
Authors: Plag Ingo , Heitmeier Maria , Domahs Frank 
Published: June 2024

Abstract
There is an ongoing debate on how speakers and listeners process and interpret information in a morphological
system that is very complex and not very transparent. A well-known test case is the German nominal number system. In this paper we
employ discriminative learning (e.g., Ramscar & Yarlett, 2007; Baayen et al., 2011, 2019) to test whether
discriminative learning networks can be used to better understand the processing of German number. We analyse behavioral data
obtained from a patient with primary progressive aphasia (Domahs et al., 2017), and the
unimpaired system. We test a model that implements the traditional cues borrowed from the schema approach (Köpcke, 1988, 1993; Köpcke
et al., 2021), and compare it to a model that uses segmental and phonotactic information only. Our results for the
unimpaired system demonstrate that a model based on only biphones as cues is better able to predict the number of a given
word-form than a model using structural phonological cues. We also test whether a discriminative learning model can predict the
number decisions by the aphasic patient. The results demonstrate that a biphone-based discriminative model trained on the
patient’s responses is superior to a structure-based model in approximating the patient’s behavior.
Beyond the Secret (gsang ba): The Performativity of Citation in an Exile Tibetan Buddhist Ritual
Authors: Nair Urmila 
Published: June 2024

AbstractThis article focuses on the Nechung kang-so (bskang gso), a ritual performed at Nechung monastery in exile, and deemed secret (gsang ba) by the monks. In my interactions with the monks, this secret presented itself as an unremitting series of contradictions and conundrums. I attempt here to portray and understand them. I posit that the secret invoked an implicit “cultural concept” (Silverstein 2004), namely, the kang-so’s transmissibility. For the kang-so’s transmission within the monastery involved a specific semiotics of authorization, rooted in a karmic ethic. To reveal the secret to me was to extricate the esoteric ritual from that traditional “social organization of interdiscursivity,” and the ethic shaping it (Gal 2018). The monks’ citations of the esoteric ritual, whereby they spoke to me of the secret, thus performed an alteration in the kang-so’s transmissibility, a reorganization of the esoteric ritual’s interdiscursivities, toward enabling its “circulation” among academic publics.
The Rise of Cross-Language Internet Memes: A Social Semiotic Analysis
Authors: Huang Xinyu , Han Yifan , Ran Yi , Yang Yakun , Yang Yixin 
Published: June 2024

AbstractCross-language internet memes have emerged as a unique and popular mode of online communication, combining bilingual elements with visually textual components. These memes exhibit distinctive characteristics at semantic, syntactic, and pragmatic levels, rendering them a noteworthy semiotic phenomenon in contemporary digital culture. To deepen our understanding of cross-language internet memes, this study investigates user perceptions through a questionnaire, employing SPSS Statistics software for analysis. Applying a social semiotic approach, we decipher the semiotic mechanisms of cross-language memes, shedding light on their potential implications for identity construction. Additionally, we reflect on two prominent trends in internet meme development: the shift from monomodal to multimodal communication and from monolingual to multilingual expressions. This research hopes to provide insights for meme research and online discourse investigations.
Highly luminescent, fast switching electro-optical device based on core–shell bimetallic nanoparticles/ ferroelectric liquid crystal composites
Authors: Abhilash T K , Abdul Hakkeem Hasna M , Anas S , Pillai Saju , Chandran Achu 
Published: June 2024

Abstract
Owing to the passive nature of liquid crystal (LC) materials, achieving luminous displays using pure LC materials is challenging. In addition, it is difficult to achieve a fast switching time using pristine ferroelectric LC devices without compromising their cell thickness. Herein, we have developed a fast switching and highly luminescent electro-optical device by dispersing a minute concentration of bimetallic nanoparticles (Au@Ag NPs) having a spherical gold core and a silver shell within a ferroelectric liquid crystal (FLC) host matrix, ZLI3654. Au@Ag core–shell NPs having synergic attributes of both counterparts were successfully synthesized by a facile seed-mediated route. The Au core helps to tune the shape of the Ag shell and provides enhanced electron density as well as improved stability against oxidation. Introducing nanoparticles induces little structural modifications to the host FLC, resulting in an improvement in the mesogenic alignment. Interestingly, ∼29-fold enhancement in the photoluminescence (PL) intensity is observed on dispersing 0.25 wt% of Au@Ag NPs into the FLC host matrix. The enhanced electromagnetic field in the FLC-nanocomposite is attributed to the Localized Surface Plasmon Resonance of Au@Ag NPs, which strengthens the photon absorption rates by the FLC molecules, culminating in the massive enrichment of the PL intensity. In addition, the improved localized electric field inside the FLC device led to a noticeable enhancement in the spontaneous polarization, dielectric permittivity, and, most interestingly, ∼53% fastening in the switching time at an optimum concentration (0.25 wt%) of Au@Ag NPs. The improved electro-optical parameters of the Au@Ag NPs/FLC composite have been compared with the performance of both pristine Au NPs/FLC and Ag NPs/FLC composites, respectively, for the comprehensiveness of the study. The present study paves a systematic way to develop FLC-based advanced electro-optical devices with faster switching and higher luminescence properties.
Tailoring the visible light band of Watt-level SCs pumped via picosecond pulse with different Raman extent
Authors: Guo Yashuai , Wang Zhenguang , Hu Xiaohong , Zhang Ting , Zhang Zhao , Zhang Wei , Wang Yishan 
Published: June 2024

Abstract
We investigate the supercontinuum (SC) tailoring property by varying the transmission fiber length after the master oscillator power amplifier system. The conversion efficiency of the visible light band is effectively enhanced via tailoring the Raman extent of the injected 30 ps pulse into the nonlinear photonic crystal fiber (PCF). Experimentally, a 3.6 W all-fiber SC spanning from 414 nm to over 1750 nm (@20 dB) is accomplished by using a high duty cycle domestic PCF through precisely controlling the extent of Raman effect. The proposed method is instructive for the further realization of high power SC with an enhanced spectral intensity in the visible light band.
Cryptographic computer generated hologram watermarking technology based on DWT-SVD
Authors: Liu Songxiao , Yu Nana , Ji Xiangxiang , Song Danying , Xi Sixing , Zhu Zhuqing , Wang Xiaolei , Lang Liying 
Published: June 2024

Abstract
To improve the security and invisibility of image encryption and concealment, an encrypted computer generated hologram (CGH) watermarking technology based on discrete wavelet transform (DWT) and singular value decomposition (SVD) is proposed. Firstly, the image to be encrypted is encoded and converted into a binary real-valued CGH. The encrypted CGH is then embedded into the host image as a watermark, implementing image encryption and concealment. During decryption, the encrypted CGH watermark is first extracted using the inverse DWT-SVD and the correct keys. Subsequently, the decrypted image is obtained by applying the correct optical key for computational holographic reproduction. The method introduces computational holographic coding and optical keys into the digital watermarking technique and combines the characteristics of DWT and SVD, solving the problem of the high false positive rate of the SVD algorithm. Simulation results show that the security of image encryption and concealment is greatly improved with the introduction of CGH into watermarking technology, especially in terms of robustness to watermark attacks and noise. This method can be applied in the fields of copyright protection and anti-counterfeiting for digital and printed images.
A quantum-enhanced magnetometer using a single high-spin nucleus in silicon
Authors: Xin 辛 Tao 涛 , Zhang 张 Ke 科 , Li 李 Jun 俊 
Published: June 2024

Abstract
Quantum enhanced metrology has the potential to go beyond the standard quantum limit and eventually to the ultimate Heisenberg bound. In particular, quantum probes prepared in nonclassical coherent states have recently been recognized as a useful resource for metrology. Hence, there has been considerable interest in constructing magnetic quantum sensors that combine high resolution and high sensitivity. Here, we explore a nanoscale magnetometer with quantum-enhanced sensitivity, based on 123Sb (I = 7/2) nuclear spin doped in silicon, that takes advantage of techniques of spin-squeezing and coherent control. With the optimal squeezed initial state, the magnetic field sensitivity may be expected to approach 6 aT⋅Hz−1/2⋅cm−3/2 and 603 nT⋅Hz−1/2 at the single-spin level. This magnetic sensor may provide a novel sensitive and high-resolution route to microscopic mapping of magnetic fields as well as other applications.
Simulation of magnetization process and Faraday effect of magnetic bilayer films
Authors: Gao 高 Sheng 升 , Du 杜 An 安 , Zhang 张 Lei 磊 , Li 李 Tian-Guang 天广 , Ma 马 Da-Cheng 大成 
Published: June 2024

Abstract
We described ferromagnetic film and bilayer films composed of two ferromagnetic layers coupled through antiferromagnetic interfacial interaction by classical Heisenberg model and simulated their magnetization state, magnetic permeability, and Faraday effect at zero and finite temperature by using the Landau–Lifshitz–Gilbert (LLG) equation. The results indicate that in a microwave field with positive circular polarization, the ferromagnetic film has one resonance peak while the bilayer film has two resonance peaks. However, the resonance peak disappears in ferromagnetic film, and only one resonance peak emerges in bilayer film in the negative circularly polarized microwave field. When the microwave field’s frequency exceeds the film’s resonance frequency, the Faraday rotation angle of the ferromagnetic film is the greatest, and it decreases when the thickness of the two halves of the bilayer is reduced. When the microwave field’s frequency remains constant, the Faraday rotation angle fluctuates with temperature in the same manner as spontaneous magnetization does. When a DC magnetic field is applied in the direction of the anisotropic axis of the film, the Faraday rotation angle varies with the DC magnetic field and shows a similar shape of the hysteresis loop.
Telluric Lines on Stellar Spectra: Prospect for Earth’s Atmospheric Study
Authors: Puspitarini L , Najla F , Malasan H L , Akbar E I 
Published: June 2024

Abstract
Astronomical spectroscopy aims to measure the spectrum of a celestial object(s). However, in the case of ground-based observation, the observed spectrum will not only present absorption or emission features from the astronomical object but also features caused by the Earth’s atmosphere, namely telluric absorption lines or telluric contamination. The telluric contamination is unwanted features in astronomy and is usually removed in the data processing. Nevertheless, they might be useful for Earth’s atmospheric study as the telluric lines will vary due to several causes (temperature, pressure, humidity, ozone content, etc.). We used spectroscopic data observed at the Bosscha Observatory, and applied spectral fitting by using the telluric transmission model. From the analysis of optical depth values, we detected variation in the telluric lines due to seasonal (monsoon). This demonstrates that stellar spectra from ground-based observation can also be used for atmospheric study.
Exploring the Impact of Variations in Earth’s Obliquity and Eccentricity on Its Spatial and Temporal Distribution of Surface Temperature
Authors: Husen B F , Premadi P W 
Published: June 2024

Abstract
The study of habitable planets has gained popularity, with a recent focus on finding Earth-like planets in the habitable zone. However, assessing habitability involves considering factors beyond just orbital position, including variations in surface temperature driven by obliquity and eccentricity. Understanding these orbital parameters is crucial for predicting surface temperature spatial and temporal distributions. Using a simplified energy balance model (EBM), we estimate surface temperature distributions through computational experiments, varying its obliquity. Extreme obliquities (>60°) lead to rapid, extreme temperature fluctuation, making it inhospitable for life.
A study of open clusters in the local galactic environment using Gaia DR3
Authors: Cahyaningtyas A F N , Leon S , Hidayat T , Alfaro E J , Bergond G 
Published: June 2024

Abstract
The presence of Gaia DR3 data allows us to conduct more comprehensive research about the large population of open clusters in the Galaxy. Investigating the effects of the Galactic environment on open clusters will provide some insights regarding their evolution driven by external factors. Observing the clusters’ shapes and movements is genuinely essential since they represent the physical conditions under their relationship with the Galactic environment. By harnessing the latest and most complete stellar data, we measure the influence of the Galactic environment on a large population of open clusters enclosing an area of 1 kpc in radius through the clusters’ compression in velocity and dispersion spaces. In this study, we observed that open clusters are compressed to the Galactic plane direction, both in velocity and dispersion spaces.
Differences in Maximum Tides Responses of the North Coast and the South Coast of Java on the Effects of the Position of the Moon and the Sun
Authors: Djamaluddin T , Susanti R D , Pranowo W S , Aditiya A , Mariyam A S , Mareta L , Hasanuddin A P 
Published: June 2024

Abstract
The influence of the earth-moon-sun system on tide events has long been known. However, the impact can vary in different coast areas. The short-term (monthly and yearly) impact of maximum tides needs to be watched out for in relation to tidal flooding, especially if it is reinforced by bad weather at sea. In 2021 NASA reported the results of the Sea Level Change Science Team study that in the 2030s tidal floods will become more frequent and threatening the coasts of the United States due to the 18.6-year lunar orbit nodal cycle which amplifies the effects of global warming. Analysis of maximum tides on the north coast of Java (using data from Jakarta and Surabaya) and on the south coast of Java (using data from Cilacap) shows that on both the north and the south coast of Java, there is no indication of the nodal cycle of the 18.6 year due to lunar orbit. However, this study shows that in short-term annual and monthly cycles there is a difference in the pattern of maximum tides on the north coast and the south coast of Java. The declination of the sun when it is most northerly (the end of June) and most southerly (the end of December) affects maximum tides on the north coast of Java, as semi-annual cycle. Meanwhile on the south coast of Java, only the southernmost declination of the sun (in the end of December) has an effect on the maximum tide, as annual cycle. For monthly cycles, maximum tides on the north coast of Java are affected by the maximum declination of the moon and moon’s perigee (in Jakarta) or by the moon phases and perigee (in Surabaya). Meanwhile, on the south coast of Java it is only affected by the moon’s phases and perigee.
Analysis of sky brightness variations in full days based on sky quality meter measurement in Pekalongan
Authors: Salma A , Herdiwijaya D 
Published: June 2024

Abstract
The night sky brightness has an ecological impact, especially for nocturnal animals. Likewise, the shift from transition night to day and vice versa known as the fajr/dawn phase, has on impact on crepuscular animals. Continuous measurement are important in astronomy due to the impact of sky brightness. The sky brightness is slower to lighten at dawn and slower to darken at dusk which can be affected by light pollution sourced from human activities, meteorological, and natural factors (Moon phase and zodiacal light). Quantization of the sky brightness continuously in full days based on the function of light pollution, Sun position, and shadow length in the daytime are important to do. Analysis of the sky brightness at the limits of the beginning of dawn, the end of dusk, the sunrise/sunset, during mid-morning/evening, and the time of culmination are useful for testing the Islamic prayers time. Measurement of sky brightness in full days has been done using Sky Quality Meter photometer at coordinates 6˚50’42” southern latitude and 109˚37’55” eastern longitude for 25 days with 3 seconds retrieval resolution that installed neutral density variable and battery. Analysis of sky brightness data was carried out using Difference, Moving average, and Polynomial methods. This research concludes that the sky brightness during twilight shows relatively small variation, with the beginning of dawn identified at -15.301˚ of Sun elevation and the end of dusk at -18.853˚ of Sun elevation. The sky brightness profiles before and after 12 noon are asymmetrical. In the evening, the average difference in sky brightness at shadow lengths of 1 to 2 is 0.9 MPSAS with 0.39 standard deviation and the average shadow length of object during fluctuations is 1.36. The average difference in sky brightness at noon compared to midnight is 9.02 MPSAS.
Observational Technique Development and Instruments Status in Observatorium Universitas Ahmad Dahlan
Authors: Pramudya Yudhiakto , Dhimas Prayoga Jullyantama A.R. , Khairul Ardi M. , Ayu Wandira Cintha , Muchlas  
Published: June 2024

Abstract
The Observatorium Universitas Ahmad Dahlan (UAD) is an urban telescope located in close proximity to city lights. Light pollution monitoring is performed using a Sky Quality Meter and an All Sky Camera, revealing a maximum Night Sky Brightness (NSB) value of 18 mag/arcsec2. A 17-inch Planewave Telescope housed in a 5-meter dome is used to image nebulae and galaxies. Portable telescopes are used to observe the crescent moon, with the use of a buffle and stacking techniques enabling daytime imaging. Lunar elongation and altitude data were obtained to assess the telescope’s capabilities and site feasibility.
The Lofar Global Citizenship Radio Array - “Gloray” (Ska-Low-North)
Authors: Miley George K. 
Published: June 2024

Abstract
This talk describes a proposed transformation of LOFAR, the world’s largest, most sensitive high-resolution radio telescope that operates at low frequencies (<300 MHz), into a multidisciplinary intercontinental facility that will be a unique engine for capacity building and development throughout Europe, North Africa, the Middle East and West Asia. As an astronomical array, GLORAY would be the “Hubble Space Telescope” of low-frequency radio astronomy, having a resolution more than 50 times better than any other presently planned low-frequency facility, including SKA-LOW. The mutually interdependent network of LOFAR antenna stations that presently stretch from Ireland to Latvia would be extended to cover North Africa, the Middle East and West Asia and converted into “innovation hubs”. These would form an intercontinental network for pure research, applied research, capacity building, education and science diplomacy within and between the participating countries.