bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the largest prime factor of non-zero Fourier coefficients of Hecke eigenforms
Authors: Gun Sanoli , Naik Sunil L. 
Published: August 2023

Abstract
Let τ denote the Ramanujan tau function. One is interested
in possible prime values of τ function. Since τ
is multiplicative and

τ
⁢

(
n
)

{\tau(n)}

is odd if and only if n is an odd square, we only need to consider

τ
⁢

(

p

2
⁢
n

)

{\tau(p^{2n})}

for primes p and natural numbers

n
≥
1

{n\geq 1}

.
This is a rather delicate question. In this direction, we show that
for any

ϵ
>
0

{\epsilon>0}

and integer

n
≥
1

{n\geq 1}

, the largest prime factor of

τ
⁢

(

p

2
⁢
n

)

{\tau(p^{2n})}

, denoted by

P
⁢

(

τ
⁢

(

p

2
⁢
n

)

)

{P(\tau(p^{2n}))}

, satisfies

P
⁢

(

τ
⁢

(

p

2
⁢
n

)

)

>

(

log
⁡
p

)

1
8

⁢

(

log
⁡

log
⁡
p

)

3
8

-
ϵ

P(\tau(p^{2n}))>(\log p)^{\frac{1}{8}}(\log\log p)^{\frac{3}{8}-\epsilon}

for almost all primes p. This improves a recent
work of Bennett, Gherga, Patel and Siksek.
Our results are also valid for any non-CM
normalized Hecke eigenforms with integer Fourier coefficients.
Beurling densities of regular maximal orthogonal sets of self-similar spectral measure with consecutive digit sets
Authors: Wu Yu-Liang , Wu Zhi-Yi 
Published: August 2023

Abstract
Beurling density plays a key role in the study of frame-spectrality of normalized Lebesgue measure restricted to a set.
Accordingly, in this paper, the authors study the s-Beurling densities of regular maximal orthogonal sets of a class of self-similar spectral measures, where s is the Hausdorff dimension of its support and obtain their exact upper bound of the densities.
Korn’s inequality in anisotropic Sobolev spaces
Authors: Benavides Gonzalo A. , Domínguez-Rivera Sebastián A. 
Published: August 2023

Abstract
Korn’s inequality has been at the heart of much exciting research since its first appearance in the beginning of the 20th century. Many are the applications of this inequality to the analysis and construction of discretizations of a large variety of problems in continuum mechanics. In this paper, we prove that the classical Korn inequality holds true in anisotropic Sobolev spaces. We also prove that an extension of Korn’s inequality, involving non-linear continuous maps, is valid in such spaces. Finally, we point out that another classical inequality, namely Poincaré’s inequality, also holds in anisotropic Sobolev spaces.
Exploring English newspaper reading of Chinese college English majors in mobile-assisted language learning
Authors: Peng Weinan 
Published: August 2023

Abstract
With advances in mobile technology, mobile devices have been widely applied in language learning. English newspaper reading apps are emerging language learning tools for Chinese English majors. However, little has been published on reading in mobile-assisted language learning (MALL) environments. Studies of English newspaper reading are limited to the classroom environment. To explore English newspaper reading in MALL, this study analysed the features of English newspaper reading apps, usage patterns, and users’ language learning strategies by adopting both quantitative and qualitative methods. This research found that (1) apps incorporating multimedia technology mainly provide vocabulary instruction. Most English majors prefer English newspaper reading apps with explanations; (2) Learners tend to use WeChat as the main reading platform instead of utilising apps in combination; and (3) The most frequently used strategies by English majors are affective strategies, while the least frequently used strategies are social strategies, although most English newspaper reading apps support collaborative learning. The study is expected to inspire the design of English newspaper reading apps and the reform of the English newspaper reading course.
Inverse problem for Dirac operators with two constant delays
Authors: Vojvodić Biljana , Vladičić Vladimir , Djurić Nebojša 
Published: August 2023

Abstract
We study inverse spectral problems for Dirac-type functional-differential operators with two constant delays greater than two fifths the length of the interval, under Dirichlet boundary conditions. The inverse problem of recovering operators from four spectra has been studied. We consider cases when delays are greater or less than half the length of the interval. The main result of the paper refers to the proof that in both cases operators can be recovered uniquely from four spectra.
Toward a semiotic pyramid: language studies, AI, and knowledge exchange economy
Authors: Poschinger Felix , Coon Robert 
Published: August 2023

Abstract
This paper addresses the interrelation between AI and language studies in the (digital) humanities in the context of knowledge exchange economies. We propose a three-dimensional semiotic model (pyramid) that includes AI as an active agent in meaning-creation into the sign system of communication and test its validity on autocompletion and predictive texting. We, therefore, analyzed 360 million tweets on COVID-19 over a period of 2 years and focused on the time-dependent shift of language use in the positive and negative extremes correlating to significant external events. The data suggest that digital language use has significantly changed over the course of the pandemic. Feedback loops are created between AI, utterance, and external reality that fossilize preconceived notions into textual isoglosses by suggesting and completing text entries. We thus argue that AI subtly changes the perception of reality by influencing the choice of wording. To mitigate the impact of AI in meaning-creation, we highlight the structural precautions undertaken by providers; we argue, however, that the (digital) humanities may re-emphasize their intrinsic value within the economy of knowledge exchange according to the subject-specific insights they may provide for language use and AI.
Bulge test technique and digital image correlation for the determination of the biaxial behavior of polymeric films
Authors: Kharrat Fatma , Chaari Rania , Khlif Mohamed , Hilliou Loic , Covas José António , Haboussi Mohamed , Bradai Chedly 
Published: August 2023

AbstractMaterials can display multiple mechanical behaviors when they are biaxially stressed. In this research work, films obtained through the blowing process were investigated in order to compare the mechanical properties and behavior of the film under uniaxial and biaxial stress conditions. Bulge test coupled with a continuous full-field strain measurement was undertaken in order to characterize polymeric film in a biaxial stress state. As far as this study is concerned, a laboratory-made pneumatic bulge test machine was used for the determination of the biaxial behavior of a 50 μm thickness PLSF (modified PLA) film. 3D-digital image correlation (3D-DIC) technique was used in order to compute the strain field continuously during the test. Tensile test was equally performed on the film along its machine direction (MD) and transverse direction (TD). Strain field distribution in the film sample was analyzed and compared in both tests. The tensile test results displayed an isotropic behavior of the film in both directions. However, a difference in the strain at break was noticed because of the thickness instability along the TD. The comparison between uniaxial and biaxial properties resulted in almost the same properties with respect to the Young Modulus as well as the tensile strength.
Research progress on preparation, modification, and application of phenolic aerogel
Authors: Yuan Chengfan , Wang Degang , Zhang Yijun , Li Kai , Ding Jie 
Published: August 2023

Abstract
Phenolic aerogel is a type of nanoporous resin-based material with low density, high specific surface area, excellent thermal insulation performance, and a high carbon residue rate which has been widely used in the field of thermal protection. However, the development of phenolic aerogel is limited by the complex and expensive preparation technique, inadequate oxidation/ablation resistance, and excessive brittleness. As a result, academic research is constantly concentrated on low-cost preparation methods and efficient modification of phenolic aerogel. This review gives a description of the preparation technology, modification techniques, and application fields of phenolic aerogel and summarizes the limitations. Now, phenolic aerogel is not applied widely due to its complex and expensive preparation technique. Moreover, phenolic aerogel shows greater brittleness and insufficient mechanical property. The prospective future developments of the materials were prospected, and the phenolic aerogel with environmental protection, efficient thermal protection, and low cost will be the mainstream research direction.
Experimental Investigation to Analyze the Effect of Cementation on the Geomechanical Behavior of Steel Slag Mixtures
Authors: Mica Nelson Gomes , Rios Sara , Viana da Fonseca António , Fortunato Eduardo 
Published: August 2023

Abstract
The sustainable use of resources requires new strategies to transform industrial byproducts into raw materials for other applications. This approach, inspired by circular economy fundamentals, can be successfully applied in transportation infrastructures where a significant amount of natural raw materials is generally required. Slags from the steelmaking process in electric arc furnaces are generally of two types: oxidizing (black colored) and reducing (lighter colored). In Portugal, the oxidizing steel slag or electric arc furnace (EAF) with controlled production has been certified as “inert steel aggregate for construction,” having high strength and stiffness when compared to conventional natural aggregates. However, because of the lack of fines, EAF usually requires a milling process with increased costs and CO2 emissions. This work studies the mixture of the two types of slags, because the reducing slag (also called ladle slag) is a fine powder with cementing properties that can enhance the behavior of the mixture while avoiding the milling process. Toward the application in granular layers of transport infrastructures, the testing procedures to study the geotechnical behavior of this innovative stabilized mixture are discussed combining chemical, durability, environmental, and hydromechanical analysis. Seismic wave velocity measurements with ultrasonic transducers provide the elastic stiffness evolution with time derived from the cementation given by the ladle slag. Unconfined compression strength and permeability results were used to propose an index parameter to correlate the mixture dosage to the observed hydromechanical performance. Durability measurements with wetting and drying cycles, as well as swelling and leaching test results, are also presented.
Influence of Packing Density on Electrochemical Performance of Lignin
Authors: Velhal Mrudul , Mehta Siddhi , Arole Kailash , Liang Hong 
Published: August 2023

Abstract
Bio-based carbonaceous materials such as lignin are taking up increasingly important roles in energy storage. However, the wide spectrum of molecular identity and structure of lignin lead to inconsistent structure, properties, and performance because of its source, extraction, and pretreatment processes. In this research, we investigate the effects of packing density on the electrochemical performance for lignin. Samples were synthesized using lignin as the electroactive material. Four distinct types of lignin, i.e., alkali lignin microparticles (MP), alkali lignin nanoparticles (NP), dealkaline lignin MP, and dealkaline lignin NP, were used in this study. They were studied through varying the packing density and its subsequent effects on the electrochemical performance. The scanning electron microscopy and Fourier-transform infrared spectrometry analysis were conducted to obtain morphology and chemical compositions. Cyclic voltammetry and cyclic charge discharge tests were conducted to evaluate the polarization resistance. The optimal packing density was found to be in the range of 0.35–0.50 g cm−3 for all samples. In the optimal packing density range, dealkaline lignin NP displayed the highest electrochemical performance with a maximum specific capacitance of 1,159 mF g−1, an energy density of 19.097 Wh kg−1, and a power density of 11.05 kW kg−1. The optimization of packing density would enable further development of lignin-containing energy storage devices such as supercapacitors.
Cleavage of VAMP2/3 Affects Oligodendrocyte Lineage Development in the Developing Mouse Spinal Cord
Authors: Fekete Christopher D. , Horning Robert Z. , Doron Matan S. , Nishiyama Akiko 
Published: August 2023

In the developing and adult CNS, new oligodendrocytes (OLs) are generated from a population of cells known as oligodendrocyte precursor cells (OPCs). As they begin to differentiate, OPCs undergo a series of highly regulated changes to morphology, gene expression, and membrane organization. This stage represents a critical bottleneck in oligodendrogliogenesis, and the regulatory program that guides it is still not fully understood. Here, we show thatin vivotoxin-mediated cleavage of the vesicle associated SNARE proteins VAMP2/3 in the OL lineage of both male and female mice impairs the ability of early OLs to mature into functional, myelinating OLs. In the developing mouse spinal cord, many VAMP2/3-cleaved OLs appeared to stall in the premyelinating, early OL stage, resulting in an overall loss of both myelin density and OL number. The Src kinase Fyn, a key regulator of oligodendrogliogenesis and myelination, is highly expressed among premyelinating OLs, but its expression decreases as OLs mature. We found that OLs with cleaved VAMP2/3 in the spinal cord white matter showed significantly higher expression of Fyn compared with neighboring control cells, potentially because of an extended premyelinating stage. Overall, our results show that functional VAMP2/3 in OL lineage cells is essential for proper myelin formation and plays a major role in controlling the maturation and terminal differentiation of premyelinating OLs.SIGNIFICANCE STATEMENTThe production of mature oligodendrocytes (OLs) is essential for CNS myelination during development, myelin remodeling in adulthood, and remyelination following injury or in demyelinating disease. Before myelin sheath formation, newly formed OLs undergo a series of highly regulated changes during a stage of their development known as the premyelinating, or early OL stage. This stage acts as a critical checkpoint in OL development, and much is still unknown about the dynamic regulatory processes involved. In this study, we show that VAMP2/3, SNARE proteins involved in vesicular trafficking and secretion play an essential role in regulating premyelinating OL development and are required for healthy myelination in the developing mouse spinal cord.
Culture of vitrified bovine ovarian tissue on agarose gel inserts maintains follicle integrity
Authors: Alkali Isa Mohammed , Colombo Martina , Luciano Alberto Maria , Nizanski Wojciech , Ali Hassan Hiba , Dziegiel Piotr , Luvoni Gaia Cecilia 
Published: August 2023

In brief
Ovarian tissue cryopreservation and culture provide an option for fertility preservation without tissue grafting, but need optimization. This study reveals that vitrified bovine ovarian tissue can be cultured on agarose gel and maintain follicle morphology, low activation, and low apoptosis.

Abstract
Ovarian tissue preservation is hitherto a promising fertility insurance option for precious animals. Ovarian tissue vitrification and culture combined approach would eliminate the need of transplanting ovarian tissue to obtain mature oocytes. We aimed at optimizing vitrification and in vitro culture conditions for improved bovine ovarian tissue viability. Ovaries obtained from the slaughterhouse were punched into fragments and divided into three groups. Group 1 (fresh) was divided into two and immediately placed in two-culture systems (culture inserts and agarose inserts). Group 2 was vitrified, warmed, and placed in the two-culture systems, while group 3 was only equilibrated and then placed in the two-culture systems. All cultures were maintained for 6 days and spent media were collected on alternate days for cytokine (interleukin 1β and interleukin 6) evaluation. Fragments were fixed for morphology assessment and immunohistochemistry. Higher percentages (P < 0.05) of grade 1 (morphologically intact) follicles were observed in fragments on agarose compared to those on culture inserts on days 2 and 4 of the culture. Conversely, we found higher (P < 0.05) shifts of primordial follicles to transitional follicles in fragments on culture inserts vis-à-vis agarose inserts which was consistent with a higher proportion of Ki-67 and MCM-7 and activated caspase-3-positive follicles. In conclusion, in vitro culture of bovine ovarian tissue on agarose inserts maintained follicle morphology, low follicle activation, and low apoptosis compared to culture inserts.
7. századi temetkezések Békés vármegyéből – Adatok a Tiszántúl avar kori lószerszámos temetkezéseihez
Authors: Balogh Csilla , Gulyás András , Lőrinczy Gábor 
Published: August 2023

AbsztraktA dolgozat a Békésszentandrás-Benda-tanya és Szarvas-Kovács-halom lelőhelyről nyolc, a 7. század második és harmadik negyedéből származó temetkezés régészeti elemzését adja. A nyolc temetkezésből öt ún. lószerszámos temetkezés, vagyis a sírokba csak a lószerszám került elhelyezésre. Ezek nemcsak a Tiszántúlról eddig ismert lószerszámos temetkezések számát növelik, hanem új adatokat is szolgáltatnak e temetkezési szokás értékeléséhez.
POTENSI LESTARI IKAN LAYANG (Decapterus spp) YANG DIDARATKAN DI PEMANGKAT, KALIMANTAN BARAT
Authors: Setya Dona , Susiloningtyas Dewi , Nurulludin Nurulludin 
Published: August 2023

Ikan layang merupakan jenis ikan yang paling banyak tertangkap di Laut Natuna Utara dan didaratkan di PPN Pemangkat. Perkembangan produksi ikan layang yang di daratkan di Pemangkat mengalami penurunan yang cukup signifikan pada tahun 2009 sampai tahun 2017 (Data Produksi PPN Pemangkat). Usaha penangkapan ikan layang di Laut Natuna Utara menunjukkan kearah over fishing dengan produksi semakin menurun tetapi upaya penangkapan meningkat. Tujuan penelitian ini untuk menyusun opsi pengelolaan terbaik pada perikanan purse seine di Pemangkat dengan menggunakan Model Fox pada Surplus produksi dan data 10 tahun dari PPN Pemangkat. Hasil perhitungan surplus produksi Model Fox menunjukkan besaran Maximum Suistainable Yield (MSY) pada Laut Natuna Utara yaitu 2.412.016 kg dengan jumlah tangkapan yang diperbolehkan sebesar 1.929.612 kg/tahun dan upaya optimumnya sebesar 18.170 upaya.Ukuran rata-rata mata jaring di PPN Pemangkat yaitu 1cm dan belum sesuai dengan peraturan yang ditetapkan. Pengawasan pemerintah terhadap penggunaan dimensi alat tangkap yang dilarang oleh PERMEN-KP No.18/ 2021 perlu terus ditingkatkan. Pengelolaan terbaik lainnya dengan pengaturan upaya penangkapan dan alat tangkap seperti tahun 2010 yaitu 32 kapal dengan trip 388 kali per tahun.
LAJU TANGKAP, KEPADATAN STOK DAN BEBERAPA ASPEK BIOLOGI UDANG JERBUNG (Penaeus merguiensis) DI PERAIRAN DOLAK, LAUT ARAFURA
Authors: Hargiyatno Ignatius Tri , Sumiono Bambang , Suharyanto Suharyanto 
Published: August 2023

Udang jerbung (Penaeus merguiensis) merupakan salah satu komuditas ekspor dari Indonesia dan menjadi target penangkapan kapal pukat udang yang beroperasi di Laut Arafura. Penelitian ini bertujuan untuk menganalisa laju tangkap, kepadatan stok dan beberapa aspek biologi udang jerbung yang berada di Laut Arafura khususnya di perairan Dolak. Dari 229 kali towing jumlah hasil tangkapan udang jerbung adalah 6.705 kg. Rata-rata laju tangkap udang jerbung adalah 32,2 kg/haul atau 13,4 kg/jam. Dengan menggunakan metode luas sapuan trawl diduga kepadatan udang jerbung adalah 0,19 kg tiap km2. Panjang karapas dari 630 ekor udang jerbung berkisar antara 17-53 mm dengan nilai rata-rata 29,97 mm dan bobot rata-rata 26,13 kg. Hubungan bobot dan panjang karapas udang dapat dinyatakan dalam persamaan W = 0,006L2,448, r= 0,95 dengan nilai b = 2,448. Distribusi kelamin didominasi oleh udang betina dengan perbandingan antara jantan dan betina adalah 1,00:2,08. Lima puluh persen dari udang jerbung yang pertama kali tertangkap (Lc) berukuran 27,8 mm, sedangkan ukuran pertama kali matang gonad (Lm) adalah 38,7 mm. Hal ini mengidikasikan udang berukuran kecil mendominasi hasil tangkapan, dimana terbukti bahwa dari total 426 sampel udang betina 75,4 % dalam kondisi tidak matang gonad. Jika penangkapan terus berlanjut tanpa kontrol maka akan terjadi penurunan populasi sumberdaya udang, sehingga perlu pengelolaan yang berkelanjutan dengan menerapkan penutupan musim dan daerah pemijahan sumberdaya udang jerbung.Banana prawn (P. merguiensis) is one of the important Indonesian export commodities and the target of shirmp trawl catching in Arafura Seas. The objectives of this research were: 1). To analyze catch rate 2). estimate the stock density and3). to study some biological aspect of Penaeus merguiensis in Arafura Seas. From a total of 229 trawl towing, amount of 6.705 kg of banana prawn was caught with an average of catch rate of 32,2 kg/houl or 13.43 kg / hr. By using swept area methods, the density of banana prawn was abouth 0.19 kg/km2. Average carapace length of 630 banana prawn tails was 29.97 mm and the average weight was 26,13 kg with a length range between 17 mm to 53 mm.. Size was first caught (Lc) on the size of 29.85 mm. Carapace length-weight relationship was equation W = 0,006L2,448,r2 = 0,95 with b = 2,448. Distribution is dominated by female shrimp. Sex ratio between males and females is 1.0: 2.08. The size of 50% banana prawn at first caught (Lc) was 27,8 mm, while the siae of the first mature gonads (Lm) was 38,7 mm. It is indicating that the small prawn dominated the catch, which the proved also by out of total 426 samples of female prawn, 75,4% were having immature gonads. The resources will be decreased if the fishing activities continue without control, so required sustainable management by applying the close season and close area where prawn are spawning.