bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phase Transitions in Bandits with Switching Constraints
Authors: Simchi-Levi David , Xu Yunzong 
Published: August 2023

We consider the classic stochastic multiarmed bandit problem with a constraint that limits the total cost incurred by switching between actions to be no larger than a given switching budget. For this problem, we prove matching upper and lower bounds on the optimal (i.e., minimax) regret and provide efficient rate-optimal algorithms. Surprisingly, the optimal regret of this problem exhibits a nonconventional growth rate in terms of the time horizon and the number of arms. Consequently, we discover surprising “phase transitions” regarding how the optimal regret rate changes with respect to the switching budget: when the number of arms is fixed, there are equal-length phases, in which the optimal regret rate remains (almost) the same within each phase and exhibits abrupt changes between phases; when the number of arms grows with the time horizon, such abrupt changes become subtler and may disappear, but a generalized notion of phase transitions involving certain new measurements still exists. The results enable us to fully characterize the trade-off between the regret rate and the incurred switching cost in the stochastic multiarmed bandit problem, contributing new insights to this fundamental problem. Under the general switching cost structure, the results reveal interesting connections between bandit problems and graph traversal problems, such as the shortest Hamiltonian path problem. This paper was accepted by J. George Shanthikumar, data science. Supplemental Material: The online appendix and data are available at https://doi.org/10.1287/mnsc.2023.4755 .
“UM NEGÃO DESSE TAMANHO”: cacos e currículos cotidianos na trajetória de um professor negro de geografia
Authors: Hozana Vinícius 
Published: August 2023

Este artigo se constrói a partir de relatos da minha trajetória ao longo de 16 anos de experiência como professor de geografia nas escolas do estado do Rio de Janeiro. Tem o objetivo de dialogar sobre currículo e ensino de geografia na aplicação da lei 10.639/03. Minha escolha teórico metodológica baseia-se em três conceitos: cotidiano, currere e paradigma indiciário. Assim, venho trilhando meu caminho na escrita acadêmica ressaltando a importância de uma educação antirracista, das múltiplas possibilidades de compreensão e valorização da produção de saberes no cotidiano escolar. Diante disso, neste artigo abordo a impossibilidade de controle do currículo, e a mudança de ótica na observação dos diversos imprevistos que permeiam nosso dia a dia, para que possamos vislumbrar parte da riqueza presente no cotidiano escolar, manifestando-se através da heterogeneidade presente nas escolas. As temáticas abordadas parecem funcionar como gatilhos, rizomas que acionam experiências e saberes dos estudantes e professores, muitas vezes levando as reflexões e os debates para caminhos bem distantes do tema. Ao navegar em um rio anastomosado, muitos são os caminhos para percorrer da nascente a foz. Nos cotidianos os sujeitos estão sempre presentes e o racismo e suas diversas manifestações também. Palavras-chave: Racismo, Estudos do cotidiano, Educação, Antirracista, Geografia.
Membangun Global Halal Hub Indonesia: Strategi dan Peluang untuk Mencapai Kompetitif di Pasar Global
Authors: Istiqlal Fais 
Published: August 2023

Abstrak
Pembangunan Global Halal Hub Indonesia (GHHI) telah menjadi bidang utama untuk pemerintah dalam upaya untuk mendukung ekonomi halal dan meningkatkan pasar global halal. Halal Hub Indonesia adalah solusi untuk membangun jaringan dan mengembangkan layanan yang terintegrasi, yang didukung oleh teknologi, demi membantu meningkatkan standar produk dan perdagangan halal. Artikel ini akan membahas tentang strategi dan peluang GHHI untuk mencapai kompetitif di pasar global. Dari sisi strategis, GHHI akan memanfaatkan sejumlah inisiatif dan layanan untuk mendukung ekonomi halal global. Secara komersial, GHHI sebagai global halal hub akan memampukan pengembangan produk dan layanan terintegrasi untuk mendukung pasar halal global. Artikel ini juga akan membahas potensi, batasan dan tantangan yang dihadapi oleh GHHI dalam mendorong pertumbuhan dan kompetitifnya pasar halal global. Artikel ini berharap agar membantu dalam pemahaman tentang pentingnya GHHI sebagai infrastruktur kunci untuk mendukung komunitas halal global, tertentu dengan mempromosikan model pengembangan setara dengan pasar halal, produksi berbasis sastra e-halal dan pengelolaan aset halal.
Generation of 107  W, 1.07  mJ femtosecond pulses from chirped- and divided-pulse Sagnac Yb-fiber amplifiers by suppression of static mode degradation
Authors: Shi Zhuo , Wang Jingshang , Zhang Yao , Wang Junli , Wei Zhiyi , Chang Guoqing 
Published: August 2023

We investigate the effect of static mode degradation (SMD) on the power scaling of mJ-level Sagnac Yb-fiber amplifiers. We find that SMD can be effectively suppressed by inserting a polarization-filtering device between two rod-type fibers. Consequently, the resulting amplifier system exhibits improved combining efficiency and average power, and it can deliver 240 fs pulses with 1.07 mJ energy and 107 W average power. This mJ femtosecond source of hundred-watt average power is of particular importance for high-field science applications.
Component of sexual health services for vaginismus management: A qualitative study
Authors: Banaei Mojdeh , Kariman Nourossadat , Ghasemi Vida , Roozbeh Nasibeh , Jahangirifar Maryam 
Published: August 2023

Background
Provision of sexual health services requires gender-sensitive management, facilities, and staff, as well as planning for gender-sensitive caregivers and education. Couples suffering from vaginismus face many types of barriers to accessing sexual health services. This qualitative study was conducted to explain the needs of sexual health services in women with primary vaginismus in Iran.

Methods
This qualitative study was conducted through the participation of 20 participants including service providers, women with vaginismus and their husbands in 2022, Iran. The samples were selected using purposive sampling method and considering the maximum variation. For data collection, in-depth semi-structured individual interviews were conducted and continued until data saturation was reached. The collected data were analyzed in MAXQDA10 software using conventional content analysis approach based on the criteria proposed by Graneheim and Lundman.

Results
Data analysis led to the emergence of three main themes: 1) Comprehensive preventive sex education which included the three categories of sex education in the education system, premarital sex education through the health system, and sex education through the media with scientific content; 2) Efficient sexual health clinics which included three categories of therapist’s skills, empowerment of sexual therapist, and structural features of sexual health clinics and cultural considerations in establishing sexual health clinics; and 3) Protocol for management and treatment of sexual problems which consisted of sexual education and counseling content, treatment requirements, and sex education approaches.

Conclusion
Based on the results of the study, comprehensive preventive sex education through the education system and the Ministry of Health can improve the attitudes of adolescents and young people. Moreover, it can take a fundamental step in solving sexual problems by providing the infrastructure necessary for the establishment of efficient sexual health clinics and protocols required to manage and treat such problems.
10-channel phased-array coil for carotid wall MRI at 3T
Authors: de Buck Matthijs H. S. , Jezzard Peter , Frost Robert , Randell Chris , Hurst Katherine , Choudhury Robin P. , Robson Matthew D. , Biasiolli Luca 
Published: August 2023

Background
Accurate assessment of plaque accumulation near the carotid bifurcation is important for the effective prevention and treatment of stroke. However, vessel and plaque delineation using MRI can be limited by low contrast-to-noise ratio (CNR) and long acquisition times. In this work, a 10-channel phased-array receive coil design for bilateral imaging of the carotid bifurcation using 3T MRI is proposed.

Methods
The proposed 10-channel receive coil was compared to a commercial 4-channel receive coil configuration using data acquired from phantoms and healthy volunteers (N = 9). The relative performance of the coils was assessed, by comparing signal-to-noise ratio (SNR), noise correlation, g-factor noise amplification, and the CNR between vessel wall and lumen using black-blood sequences. Patient data were acquired from 12 atherosclerotic carotid artery disease patients.

Results
The 10-channel coil consistently provided substantially increased SNR in phantoms (+77 ± 27%) and improved CNR in healthy carotid arteries (+62 ± 11%), or reduced g-factor noise amplification. Patient data showed excellent delineation of atherosclerotic plaque along the length of the carotid bifurcation using the 10-channel coil.

Conclusions
The proposed 10-channel coil design allows for improved visualization of the carotid arteries and the carotid bifurcation and increased parallel imaging acceleration factors relative to a commercial 4-channel coil design.
REFLEKSI DUA PULUH TAHUN PEMBANGUNAN PENDIDIKAN DI TANAH PAPUA (2001-2021)
Authors: Afriansyah Anggi 
Published: August 2023

Pasca terbit Undang-Undang No. 21 Tahun 2001 mengenai Otonomi khusus bagi Provinsi Papua, pembangunan pendidikan masih menghadapi berbagai situasi problematik dan kompleks. Situasi tersebut menyebabkan anak-anak Papua belum mendapatkan hak yang utuh untuk mendapatkan pendidikan yang bermutu dan berkualitas, pendidikan yang responsif terhadap kondisi geografis, demografis, sosial, dan budaya. Dalam artikel ini, saya berargumen bahwa pendidikan sebagai bagian dari hak asasi manusia dan janji pencerdasan bagi anak-anak bangsa belum sepenuhnya ditunaikan di Tanah Papua. Hal tersebut tampak dari implementasi kebijakan yang belum memberi prioritas kepada peningkatan kapasitas dan berpihak kepada orang asli papua. Artikel ini bertujuan untuk, pertama, memaparkan janji pendidikan di masa otonomi khusus. Kedua, ketimpangan antara amanat kebijakan pendidikan dan implementasi kebijakan di masa otonomi khusus. Dan ketiga, imaji manusia papua masa depan melalui konstruksi pendidikan. Berdasar ketiga tujuan tersebut artikel ini berupaya untuk memaparkan refleksi dua puluh tahun Pembangunan pendidikan di Tanah Papua.
PENGUASAAN DAN MELUMPUHKAN PERLAWANAN POLITIK PAPUA ‘SOAL HAM DIATUR DARI BELAKANG’
Authors: Den Broek Theo Van 
Published: August 2023

Dalam refleksi ini kami menguraikan ciri-ciri situasi kemasyarakatan di Papua pada akhir 2022. Situasi dewasa ini sebenarnya adalah hasil dari pola ‘strategi pendekatan keamanan’ yang diterapkan Pemerintah Indonesia selama 3 ½ tahun terakhir ini. Harapan pemerintah, supaya dengan ‘pendekatan keamanan’ konflik di Papua dapat diselesaikan. De facto, yang tercapai: penerapan strategi itu menghasilkan situasi yang sebaliknya, yakni: konflik tidak diselesaikan, melainkan menjadi jauh lebih kompleks dan sulit diatasi. Strategi pendekatan keamanan ternyata disertai dengan suatu eskalasi kekerasan yang tidak saja mengancam hidup fisik banyak warga, namun juga mempunyai dampak sangat negatif atas sejumlah sektor hidup bermasyarakat (termasuk: sektor penerapan hukum, sektor kebebasan pengungkapan pendapat dan berkumpul, sektor demokrasi, dan sektor kependudukan). Setelah 3 ½ tahun mengungguli pendekatan keamanan, ternyata masyarakat Papua, secara khusus masyarakat asli Papua, merasa diantar memasuki jalan buntu. Suatu suasana di mana tidak ada titik terang lagi akan suatu penyelesaian permasalahannya secara bermartabat. Untuk membuka jalan menuju suatu penyelesaian permasalahan dengan baik dan damai, perlu kita [1] menghilangkan dampak negatif dari kebijakan selama 3 ½ tahun itu, dan [2] kesediaan semua pihak untuk menunjukkan suatu ‘political will’ yang betul dan membuka diri untuk berdialog, termasuk pembahasan aspek politik yang sebenarnya merupakan akar utama permasalahan di Papua.
KONTESTASI NASIONALISME INDONESIA PADA TIGA DAERAH PENYEMAIAN DI PAPUA
Authors: Meteray Bernarda 
Published: August 2023

Walapun proses integrasi 1969 sesuai dengan norma internasional dan diakui badan PBB dan perwakilan orang Papua dalam Dewan Musyawarah Pepera memilih tetap berada dalam Indonesia, gerakan Papua Merdeka masih ada hingga saat ini. Maka yang masih menjadi polemik saat ini adalah apakah orang Papua yang menghendaki berintegrasi atau pemerintah Indonesia yang menginginkan? Kajian ini bertujuan untuk mengetahui siapa actor perdana dan bagaimana proses awal nasionalisme Indonesia di tiga daerah penyemaian yaitu Jayapura, Serui dan Boven Digul. Hasil kajian ini menunjukkan bahwa sekalipun para aktor ada yang merupakan kelompok nasionalis yang diasingkan dan ada yang menjadi pegawai pemerintah Belanda namun masih berjiwa nasionalis, ironisnya mereka tidak dipersiapkan untuk mengindonesiakan orang Papua. Akibatnya proses membangun keindonesiaan di Papua sangat singkat tanpa perencanaan yang matang.
PERAN INDONESIA SEBAGAI KEKUATAN MENENGAH DALAM G20 DI TENGAH DISRUPSI GEOPOLITIK KONFLIK RUSIA-UKRAINA
Authors: Sudjatmiko Totok , Yayusman Meilinda Sari , Budianto Firman , Syafarani Tri Rainny 
Published: August 2023

Dalam struktur jaringan global, kondisi menyusutnya dunia telah menjadikan interaksi negara-negara di dunia semakin meningkat. Hal ini menjadikan aktor-aktor negara semakin saling terhubung dan saling bergantung. Pada kondisi tersebut, tiga kondisi global yang patut menjadi perhatian dunia saat ini, yaitu: (1) dampak konflik Rusia-Ukraina, yang telah menjadi perang berkepanjangan dan berdampak global; (2) keberadaan G20; (3) peran negara kekuatan menengah, khususnya Indonesia, dalam melindungi kepentingan nasional. Sebagai kekuatan menengah dan pemegang Presidensi G20 tahun ini, Indonesia mempunyai kesempatan besar untuk dapat berperan dan berkontribusi dalam kondisi global tersebut dengan tetap memprioritaskan kepentingan nasionalnya di tengah kondisi global saat ini. Menggunakan metode kualitatif, penelitian ini melihat peran Indonesia di tengah disrupsi geopolitik konflik Rusia-Ukraina dalam posisinya sebagai kekuatan menengah di G20. Hasil studi menunjukkan bahwa Indonesia, sebagai kekuatan menengah dan pemegang presidensi G20, telah memainkan peran sebagai mediator dalam merespons konflik Rusia-Ukraina dan pembangun jembatan interaksi (bridge builder) antara negara berkembang dan negara maju melalui forum G20 sebagai forum multilateral. Hal ini dilakukan oleh Indonesia guna memperjuangkan kepentingan nasional dan global di tengah disrupsi geopolitik. Kata Kunci: G20, Disrupsi Geopolitik, Indonesia, Konflik Rusia-Ukraina, Kekuatan Menengah
On the Happening of “Frank’s Place”: A Neo-Heideggerian Psychogeographic Appreciation of an Enchanted Locale
Authors: Urie Andrew 
Published: August 2023

AbstractIn this experimental article, I employ what I term a neo-Heideggerian approach that entails harnessing a selective amalgamation of the thought of Martin Heidegger (1889–1976) as a hermeneutical energy, which I direct towards my account of a series of personal psychogeographic experiences that have entailed encounters with an enchanted social space otherwise obscured within the working-class suburb of Scarborough, Ontario (Canada). I engage this neo-Heideggerian hermeneutical energy not as a professional philosopher but rather as a working culturalist interested in exploring how Heidegger’s thought can be made “to do” in the contemporary multicultural world. Accordingly, I seek to redeem his thinking from crass accusations of being commensurate with a white-inflected blood and soil nationalism.
Spatial variation of soil nutrients and evaluation of cultivated land quality based on field scale
Authors: Wang Lishu , Jia Yanhui , Cheng Dongjuan , Zhao Zhi , Tao Tao 
Published: August 2023

Abstract
The current cultivated land quality (CLQ) evaluation method fails to consider the determination of soil nutrients, resulting in the low efficiency of soil nutrient message extraction. In an effort to effectively solve the above problems, combined with the spatial variation of soil nutrients (SVSN) at the field scale, a CLQ evaluation method is proposed. The soil nutrients were determined according to the soil spatial variation analysis, and the soil color was standardized. The characteristic bands were determined by soil fertility and nutrients such as nitrogen, phosphorus, and potassium, and the soil nutrient message was preprocessed. On this basis, the soil nutrient message extraction model was constructed. According to the damage principle of subsoiling shovel, the limit value of the membership function of the CLQ exponent is determined, and the weighted sum method is used to calculate the CLQ exponent, so as to realize the SVSN and the evaluation of CLQ at the field scale. The experimental results show that the dimensional autocorrelation of soil bulk density and soil water content in different soil layers is high and that of capillary porosity, non-capillary porosity, and total porosity in different soil layers is strong.
Lignin analysis of sediments from around 2,000 to 1,000 years ago (Jiulong River estuary, southeast China)
Authors: Jin Fang-Fang , Chen Xue-Gang , Loh Pei Sun , Chang Yuan-Ping , Yang Chin-Wen 
Published: August 2023

Abstract
In this work, a sediment core collected from the Jiulong River estuary in southeastern China was subjected to 14C dating of foraminifera, as well as lignin, total organic carbon, and stable carbon isotope (δ13C) analyses in order to determine the impacts of climate change and human activities on the sedimentary organic matter in this area from around 2,000 to 1,000 years ago. The ratios of lignin parameters syringyl/vanillyl and cinnamyl/vanillyl ranged from 1.60 to 8.63 and 0.11 to 0.45, respectively, and the lignin phenol vegetation index ranged from 25.14 to 1740.14, indicating the presence of non-woody angiosperms. The ratio of vanillic acid/vanillin ranged from 0.42 to 2.04, indicating medium to high degrees of oxidative degradation. The vertical distribution profile showed a similar historical sedimentary trend with locations at higher latitudes along the Zhejiang-Fujian Mud Area, with the lower abundance of total lignin from around 2400 to 2000 BP being attributed to the decreasing temperature during this period. However, all the lignin parameters showed higher values and greater fluctuations due to increasing temperatures after 2000 BP, and human activity has probably had the greatest impact in the most recent 1,000 years.
Investigation of microstructural evolution in a hybrid additively manufactured steel bead
Authors: Ali Anshari Md. Anwar , Mishra Rajnish , Imam Murshid 
Published: August 2023

Abstract
Motivated by the beneficial effects of friction stir processing (FSP) for microstructural grain refinement, equiaxed grain production, and minimizing metallurgical defects, additive bead (AB) produced by the gas metal arc welding-wire arc additive manufacturing (GMAW-WAAM) technique was subjected to FSP. This was because deposited additive bead often develops defects such as shrinkage, voids, solidification cracking, during liquid to solid transformation. In this study, a low carbon steel double pass additive bead with 32 % lateral overlap was fabricated by the GMAW-WAAM technique followed by hybridization through FSP in the overlapped region (OR). The peak temperature estimation during bead deposition and FSP on bead was done through modeling by using ABAQUS. The microstructural analysis was carried out by using optical microscopy, scanning electron microscopy, electron backscattered diffraction, and transmission electron microscopy. The microstructure of OR of deposited additive bead is dominated by a combination of ferrite and bainite while that of hybrid additive bead (HAB) is dominated by a combination of ferrite and martensite. Further, the analysis revealed the effects of FSP on the OR in the form of grain refinement from 5.56 µm to 3.50 µm and a decrease in the low angle grain boundaries from 35.4 % to 10.6 %. The continuous dynamic recrystallization is observed since the bainitic fraction in the overlapped region decreased along with an increase in the fraction of martensite in the friction stir processed zone. The kernel average misorientation is observed to decrease after FSP from 1.001 of AB to 0.608. The microhardness test reveals the decrease in the hardness after FSP.
Crystal structure of chlorido-(5-nitro-2-phenylpyridine-κ2
N,C)-[(methylsulfinyl)methane-κ1
S]platinum(II), C13H13ClN2O3PtS
Authors: Zou Hao , Tan Wei , Zhang Jian-Guo 
Published: August 2023

Abstract
C13H13ClN2O3PtS, monoclinic, C2/c (no. 15), a = 7.9405(8) Å, b = 18.0744(18) Å, c = 21.513(2) Å, β = 98.781(1)∘, Z = 8, V = 3051.3(5) Å3, R
gt(F) = 0.0535, wR
ref(F
2) = 0.0233, T = 296 K.
Studies on Information Users and Non-Users: An Alternative Proposal
Authors: Rabello Rodrigo 
Published: August 2023

Abstract
Studies on non-users are often neglected in the area of information. Such research studies face challenges to obtain diagnostics. This article defends the realization of studies comprehending both information users and non-users, approaching different focuses and conceptions. The theoretical frameworks approached contributions and limitations of these concepts. The term “information non-user” can be employed to approach subjects ignored or out of interest in the area of information. Public policies on information, education, and culture seek to convert such non-users into users, as they promote the “socially” valued culture. However, mediating institutions may also acknowledge the culture of non-users and appreciate their informational needs and situations in context. Considering the studies on users and non-users bring benefits for the field and the society, working with a wide, inclusive conception. Yet, such studies may not include other processes, such as information reading and appropriation in certain contexts, or even disregard informational behaviors and practices in everyday life. It is important to reflect on epistemological and theoretical–methodological choices to perform such studies. These decisions reflect, politically and ethically, a worldview from professors, researchers, and professionals in the field of information, which can give voice and a leading role for such, while rendering others silent and invisible.
A cognitive-semiotic approach to impoliteness: Effects of conventionality and semiotic system on judgements of impoliteness by Russian and Swedish speakers
Authors: Zlov Vladislav , Zlatev Jordan 
Published: August 2023

Abstract
The field of (im)politeness studies has been steadily growing and developing but the role of conventionality and the type of semiotic system (e.g., language vs. gesture) for impoliteness perception has not been sufficiently explored. We used a cognitive-semiotic framework combining a reaction-time experiment and in-depth interviews with sixty participants to explore how Russian and Swedish native speakers evaluate and describe highly and less conventional impolite behaviour expressed either through speech or through gesture. The results showed a positive correlation between the conventionality of expressions and how impolite they are judged to be, and that highly conventional expressions lead to faster judgements. Few differences were found between impolite expressions in the experiment, but some were reflected in the interviews. Further, we found that Swedish participants evaluated language and gestures as very impolite more often than Russian participants did. We discuss these findings through the lens of the proposed framework and offer a three-dimensional analysis of the concept of conventionality in terms of frequency, normativity, and encodedness.