bluuebunny/crossref_metadata_2025 huggingface dataset:
ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Nested Morphological and Kinematic Structures of Outflows Revealed in SiO and CO Emission
Authors: Liu 劉 Chun-Fan 君帆 , Shang 尚 Hsien 賢 , Johnstone Doug , Ai 艾 Tsung-Han 宗瀚 , Lee 李 Tsz Ming 子銘 , Krasnopolsky Ruben , Hirano Naomi , Dutta Somnath , Hsu 許 Shih-Ying 世穎 , López-Vázquez Jesús Alejandro , Liu 呂 Sheng-Yuan 聖元 , Liu Tie , Tatematsu Ken’ichi , Zhang Qizhou , Rawlings Mark G. , Eden David , Ren Zhiyuan , Sanhueza Patricio , Kwon Woojin , Lee Chang Won , Kuan 管 Yi-Jehng 一政 , Bandopadhyay Somdeb , Väisälä Miikka S. , Lee 李 Chin-Fei 景輝 , Das Indrani
Published: January 2025

The Atacama Large Millimeter/submillimeter Array Survey of Orion Planck Galactic Cold Clumps (ALMASOP) reveals complex nested morphological and kinematic features of molecular outflows through the CO (J = 2−1) and SiO (J = 5−4) emission. We characterize the jet and outflow kinematics of the ALMASOP sample in four representative sources (HOPS 10, 315, 358, and G203.21-11.20W2) through channel maps and position–velocity diagrams (PVDs) parallel and transverse to the outflow axes. The combined CO and SiO emission exhibits the coexistence of the conventional extremely high-velocity jets and shell-like low-velocity cavity walls and new features. More complex, nested bubble-like and filamentary structures in the images and channel maps, triangle-shaped regions near the base of the parallel PVDs, and regions composed of rhombus/oval shapes in the transverse PVDs are also evident. Such features find natural explanations within the bubble structure of the unified model of jet, wind, and ambient medium. The reverse shock cavity is revealed on the PVD base regions, and other features naturally arise within the dynamic postshock region of magnetic interaction. The finer nested shells observed within the compressed wind region reveal previously unnoticed shocked emission between the jet and the conventional large cavity walls. These pseudopulse-produced filamentary features connect to the jetlike knotty blobs, creating an impression of episodicity in mass ejection. SiO emission is enhanced downstream of the reverse shock boundary, with jetlike excitation conditions. Combined, these observed features reveal the extended structures induced by the magnetic interplay between a jet-bearing magnetized wide-angle wind and its ambient magnetized surrounding medium.
Disk-locking Regulates Stellar Rotation in Young Clusters: Insights from NGC 2264
Authors: Bu 卜 Yutian 玉田 , He 贺 Chenyu 辰昱 , Fang 房 Min 敏 , Li 李 Chengyuan 程远
Published: January 2025

Many young clusters possess extended main sequences, a phenomenon commonly ascribed to stellar rotation. However, the mechanism behind their very wide stellar rotation distributions remains unclear. A proposed explanation is that magnetic star–disk interaction can regulate stellar rotation, i.e., protostars with longer disk lifetimes will eventually evolve into slow rotators, and vice versa. To examine this hypothesis, we took the star-forming region NGC 2264, as a test bed. We have studied its high-mass pre-main-sequence and zero-age main-sequence (ZAMS) stars. We find that, on average, diskless pre-main-sequence stars rotate faster than their disk-bearing counterparts. The stellar rotation distribution of the ZAMS stars is similar to evolved young clusters. We conclude that disk-locking may play a crucial role in the rotational velocity distribution of intermediate-mass early-type stars. We suggest that the observed wide stellar rotation distributions in many young clusters can occur in their early stages.
UPdec-Webb: A Data Set for Coaddition of JWST NIRCam Images
Authors: Wang Lei , Shan Huanyuan , Nie Lin , Cheng Cheng , Yuan Fang-Ting , Cui Qifan , Li Guoliang , Xie Yushan , Liu Dezi , Liu Yao , Fang Min , Li Nan , Jia Peng , Li Ran , Liu Fengshan , Shu Yiping , Jiang Chang , Wei Cheng-Liang , Qu Han , Zheng Wen-Wen , Zhu Li-Yan , Kang Xi
Published: January 2025

We present the application of the image coaddition algorithm, upsampling and point-spread function (PSF) deconvolution coaddition (UPDC), for stacking multiple exposure images captured by the James Webb Space Telescope (JWST) Near-Infrared Camera. By addressing the PSF effect, UPDC provides visually enhanced and sharper images. Furthermore, the antialiasing and superresolution capabilities of UPDC make it easier to deblend sources overlapped on images, yielding a higher accuracy of aperture photometry. We apply this algorithm to the SMACS J0723 imaging data. Comparative analysis with the Drizzle algorithm demonstrates significant improvements in detecting faint sources, achieving accurate photometry, and effectively deblending (superresolution) closely packed sources. As a result, we have newly detected a pair of close binary stars that were previously unresolvable in the original exposures or the Drizzled image. These improvements significantly benefit various scientific projects conducted by JWST. The resulting data set, named “UPdec-Webb,” can be accessed through the official website of the Chinese Virtual Observatory.
Mortality in Patients With Sjögren Disease: A Prospective Cohort Study Identifying Key Predictors
Authors: Rusinovich Lovgach Olga , Plaza Zulema , Fernández Castro Mónica , Rosas José , Martínez-Taboada Victor , Olivé Alejandro , Menor Almagro Raul , Serrano Benavente Belen , Font-Urgelles Judit , Garcia-Aparicio Angel , Manrique-Arija Sara , Garcia-Vadillo Alberto , Lopez-Gonzalez Ruth , Narvaez García Javier , Rodriguez-Lozano María Beatriz , Galisteo Carlos , Gonzalez-Martin Juan Jorge , Vela-Casasempere Paloma , Bohorquez Cristina , Erausquin Celia , Paredes-Romero María Beatriz , Riancho-Zarrabeitia Leyre , Melchor Diaz Sheila , Pego-Reigosa Jose Maria , Heredia Sergio , Moriano Clara , Blazquez Cañamero María Angeles , Estrada Paula , Judez Enrique , Belzunegui Otano Joaquín , Ramos Giráldez Consuelo , Domínguez-Álvaro Marta , Sánchez Alonso Fernando , Andréu Sánchez José Luis
Published: January 2025

Objective

We aimed to quantify the mortality risk in a large, well-characterized cohort of patients with Sjögren disease (SjD) and to identify independent predictors of mortality in this population.

Methods

We included 314 patients diagnosed with SjD according to the 2002 American-European Consensus Group criteria from a prospective, multicenter SjögrenSER Prospective cohort. Detailed data on systemic manifestations, serological markers, disease activity, and mortality were collected after a median of 9.5 (IQR 9.2-9.9) years of follow-up. The primary outcome was overall mortality, and secondary analyses aimed to identify independent predictors of mortality using Cox proportional hazards models. Standardized mortality ratios were calculated by comparing the observed deaths in the SjD cohort to the expected deaths in an age- and sex-matched general population.

Results

The study identified a 70% increased mortality risk in the SjD cohort compared to the general population, with a standard mortality ratio of 1.7. Infections (35.7%), malignancies (23.8%), and cardiovascular disease (CVD; 7.1%) were the most common causes of death. Multivariate analysis revealed that older age (HR 1.11/year, 95% CI 1.07-1.15), C4 hypocomplementemia (HR 3.75, 95% CI 1.55-9.06), elevated erythrocyte sedimentation rate (ESR; HR 1.01, 95% CI 1.00-1.03), history of heart failure (HR 4.24, 95% CI 1.02-17.58), and pulmonary involvement (HR 3.31, 95% CI 1.39-7.88) were independent predictors of mortality.

Conclusion

This study found a significantly increased mortality risk in SjD, with infections, malignancies, and CVD as leading causes of death. Independent predictors of mortality include advanced age, C4 hypocomplementemia, elevated ESR, heart failure, and pulmonary involvement, underscoring the need for proactive, individualized management.
Potentially Avoidable Emergency Department Utilization by Persons With Psoriatic Arthritis and Ankylosing Spondylitis: A Population-Based Cohort Study
Authors: Mocanu Victor , Barber Claire E.H. , McLane Patrick , Chomistek Kelsey , Davidson Eileen , Elliott Meghan J. , Hildebrandt Clare , Katz Steven , Lin Katie , McQuitty Shanon , Russon Nazret , Holroyd Brian R. , Lang Eddy , Barnabe Cheryl
Published: January 2025

Objective

Greater accessibility to ambulatory services may mitigate emergency department (ED) presentations for lower acuity issues. This study examined ED utilization patterns for individuals with psoriatic arthritis (PsA) and radiographic axial spondyloarthritis (r-axSpA) in a universal access healthcare setting.

Methods

Linked population-based administrative datasets in Alberta, Canada (fiscal years 2007/ 2008-2017/2018) were assessed for yearly ED visit frequency, timing, triage acuity, most responsible diagnoses, and disposition for persons with PsA and r-axSpA.

Results

A total of 4984 individuals with PsA and 14,690 with r-axSpA had 53,174 and 124,037 unique ED encounters, respectively. On average, 47.6% of persons with PsA and 35.7% with r-axSpA accessed the ED annually. Low acuity encounters (triaged as less urgent or nonurgent) were common, comprising 44.2% and 50.3% of visits for PsA and r-axSpA cohorts, respectively. Infection and injury were the most common responsible diagnoses. Presentations for inflammatory arthritis were infrequent (1.2% and 2% for PsA and r-axSpA cohorts, respectively), with no significant differences by sex or urbanicity. Rural patients had nearly twice the mean number of visits per year, had a higher frequency of less acute presentations, and were admitted less often in both disease cohorts. Sex differences included differential timing of presentation to EDs, and female patients with PsA had a lower frequency of admission relative to male patients with PsA.

Conclusion

ED use for less urgent and nonurgent health concerns was frequent for persons with PsA and r-axSpA, particularly in rural settings. These data can inform tailored health service delivery including access solutions for persons residing in rural areas.
Non mais, c’est incroyable ! Analyse sémantico-pragmatique de non mais en français contemporain
Authors: Rodríguez Somolinos Amalia
Published: January 2025

La combinaison de non et de mais a produit en français contemporain deux marqueurs distincts à valeur pragmatique. Ils marquent tous les deux une opposition de type énonciatif. L’interjection Non mais ! 1 est une unité prosodique et fonctionnelle qui a une fonction expressive. Non mais ! est un marqueur de désaccord impoli. Il entre toujours dans des contextes conflictuels, polémiques. Il enchaîne sur les propos ou sur le comportement de l’allocutaire pour s’y opposer. Le marqueur traduit ainsi l’indignation ou l’incrédulité du locuteur. Non mais ! s’oppose en fait à la prétention qu’a l’allocutaire d’avoir le droit d’agir d’une certaine façon ou de tenir certains propos. Cela débouche sur une mise en question de la personne même de l’allocutaire. Non mais 2 introduit également une opposition de type énonciatif, mais il n’entre pas dans des contextes polémiques comme l’interjection non mais ! Non mais 2 est une articulation de la conversation, il sert à changer de sujet tout en ménageant une transition.
La Création de réseaux dédiés à l’enseignement design‑build : mise en place, objectifs, enjeux depuis 2012
Authors: Madelaine Coline
Published: January 2025

Cet article s’intéresse au développement, au cours des années 2010, de réseaux internationaux d’enseignants proposant d’autres manières de se former à l’architecture à travers les pédagogies du design-build et du live project. Il présente les conditions d’émergence de ces réseaux, notamment le designbuildXchange et le Live Projects Network, et retrace leur chronologie. Il se penche ensuite sur les raisons de leur apparition ainsi que sur les enjeux auxquels ils sont actuellement confrontés, dans une approche à la fois critique et prospective. Il s’agit de chercher à comprendre leur positionnement vis-à-vis de l’enseignement de l’architecture, qu’ils proposent de renouveler.
L’École d’architecture et après ? Enquête sur les bifurqueurs et reconvertis, le cas des jeunes diplômés de l’ENSA Nantes
Authors: Horsch Bettina , Ouvrard Pauline
Published: January 2025

Partant du constat que le métier d’architecte a profondément évolué ces dernières décennies, nous étudions la manière dont les établissements d’enseignement supérieur en architecture, plus particulièrement l’École nationale supérieure d’architecture de Nantes (ENSA Nantes), s’adaptent à ces évolutions. Les transformations se traduisent dans les trajectoires universitaires des étudiants, dans les rapports différenciés qu’ils entretiennent à la formation ainsi que dans la manière dont ils façonnent leurs parcours et projettent leurs devenirs professionnels. Loin d’endosser l’exercice canonique de l’architecte, un nombre croissant de diplômés en architecture exercent des pratiques « atypiques », bifurquent vers d’autres mondes de l’architecture ou s’en détournent complètement, la profession ne leur offrant pas suffisamment d’opportunités correspondant à leurs valeurs. Comment les figures du reconverti et du bifurqueur permettent-elles de qualifier d’autres manières de prendre place au sein et en dehors des mondes de l’architecture ?L’article rend compte d’une recherche au long cours, quantitative et qualitative, visant à documenter les parcours et les devenirs des étudiants en architecture à travers le cas de l’ENSA Nantes1. Les travaux présentés se concentrent sur l’insertion professionnelle des diplômés, trois à six ans après l’obtention de leur diplôme.
Se rapprocher du « réel » ou diversifier les compétences ? Un atelier coopératif de conception architecturale à l’ENSA de Clermont-Ferrand
Authors: Laporte Rémi
Published: January 2025

Dans les écoles nationales supérieures d’architecture françaises (ENSA), la dernière décennie a vu s’exprimer une demande étudiante significative en faveur d’un rapprochement des programmes pédagogiques du « réel » des pratiques et des enjeux sociétaux actuels. Ce phénomène, qui fait écho à des préoccupations déjà exprimées dès la fin des années 1960 et aux expérimentations qui en ont découlé, s’accompagne aujourd’hui dans la plupart des ENSA de l’essor non concerté d’enseignements de conception architecturale revendiquant cet objectif, et recourant à des procédés de pédagogie coopérative et pluridisciplinaire. Constatant que cette évolution recouvre des orientations communes mais aussi une diversité de situations et reste peu traitée par la littérature, cet article propose de contribuer à la documenter via une analyse réflexive de l’un de ces enseignements. L’intention est de clarifier les fondements théoriques auxquels il renvoie et les dispositifs didactiques qu’il met en œuvre pour développer un apprentissage coopératif de la conception architecturale visant l’acquisition d’une gamme élargie de compétences. Il s’agit aussi de caractériser la nature de cette coopération et des relations d’acteurs qu’ils permettent de créer en les rapprochant du concept de transaction sociale, et d’en identifier les limites et les biais induits, tant dans le processus d’enseignement que dans ses résultats.
Le site de capture de la Haute-Moselle : de la connaissance à la reconnaissance
Authors: Cordier Stéphane , Harmand Dominique
Published: January 2025

Le site de la capture de la Haute-Moselle, localisé entre les vallée de la Meuse et de la Moselle au cœur de la Lorraine (NE France), présente ce paradoxe d’être un site bénéficiant d’une reconnaissance internationale depuis plus d’un siècle, grâce notamment aux travaux de Davis, alors même que sa valorisation locale reste encore très restreinte. Cet article propose une présentation du site, des recherches géomorphologiques récentes, et des perspectives de valorisation géopatrimoniale.
The “Whys and Hows” of Data Collection When Designing Fieldwork Methods at Palaeolithic Sites (Abridged version)
Authors: Discamps Emmanuel , Thomas Marc , Faivre Jean-Philippe , Gravina Brad
Published: January 2025

The robustness and accuracy of archaeological field data condition subsequent studies of past lifeways due to the destructive nature of excavation. Few articles, however, succinctly describe and explain the excavation methods adopted. This often causes difficulties for researchers wishing to restudy collections or compare data between different sites and equally raises questions concerning the reproducibility of fieldwork. Here, we describe the excavation methods used at two Middle Palaeolithic sites, Combe-Grenal and Le Moustier (Dordogne, France), after attempting to justify and explain the nature of the data required by various specialists. These two sites, which contain very rich archaeological deposits, required rethinking how to optimise the acquisition of field data in terms of time and consumption of plastic bags. Two simple technical solutions proved particularly effective: a) the use of a single, continuous numbering system for all data and b) a system of compartmentalised trays and boxes. The interplay between needs, data, methods and justifications for the choices made is discussed throughout the text.
Analysis of Naringin and Hesperidin Compounds in Berastagi Sweet Orange (Citrus Sinensis L) Peel Extract
Authors: Batubara Winda Rizki Pebrina , Susilawati Tri Nugraha , Indarto Dono
Published: January 2025

Lipid metabolism is the process of breaking down triglycerides into fatty acids and glycerol, which are oxidized to provide energy. Peroxisome proliferation-activated receptor (PPAR)- alpha and adenosine monophosphate protein kinase (AMPK) are key proteins to increase endogenous lipolysis, which become important targets for weight loss management. Orange peels generally contain hesperidin and naringin compounds which can improve lipid metabolism through lipolysis, cholesterol regulation, inhibition of fat absorption, antioxidants and anti-inflammation. This study aimed to identify hesperidin and naringin compounds in Berastagi sweet orange peel extract (OPE). Berastagi sweet oranges were obtained from local market in Surakarta, Central Java, Indonesia and extracted using the maceration method with 96% (v/v) ethanol solvent. Identification of hesperidin and naringin compounds was performed by High Performance Liquid Chromatography (HPLC) and Liquid Chromatography Mass Spectrometer (LCMS) methods at the Integrated Laboratory of Universitas Sebelas Maret (UNS) and Universitas Diponegoro respectively. The results of HPLC analiysis were further calculated by using the linear regression formula to determine the concentration of the sought-after compounds. Hesperidin detected in OPE as 0.0045 mg/ml. The LCMS analysis could not detect hesperidin and naringin; however, it detected naringenin, a naringin derivate. In conclusion, OPE has low hesperidin concentration and a naringin derivate. Further studies are needed to obtain more hesperidin and naringin; for example, by using other solvents and different extraction methods.
Synthesis and Characterization of Copper Complex Chelated with Phenobarbital Ligand
Authors: Azizah Ninna Arifatun Nurul , Rahardjo Sentot Budi , Lestari Witri Wahyu , Marliyana Soerya Dewi
Published: January 2025

The research is intended to synthesize copper(II) with Phenobarbital (PB) complex in 1 : 4 mole ratio. The sole reflux method is designated to synthesize reactant within methanol solvent. Cu(II) complex is characterized using Atomic Absorption Spectrophotometry (AAS), UV-Vis Spectrophotometer, Fourier-transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Conductivity meter, and Magnetic Susceptibility Balance (MSB). The Cu(II)-PB complex signified 1 absorption peak at 517.5 nm with 2Eg → 2T2g transition. Complex is then composed by 6 electron donors of Cu ion-bound ligand, forming the octahedral geometry. Complex possesses the molecule formula of [Cu(PB)3]Cl2, this signifies only the PB that bound to Cu(II) ion as ligand through Oxygen and Nitrogen atom donors. There is no evidence of H2O molecules coordinated as ligand. Complex is electrolyte along with Cl- as counter ion that neutralized the complex charge. Complex is also being paramagnetic with the value of μeff of 1.74 BM.
Evaluation of the Antibacterial Activity of Pinostrobin Derivative Compounds from Ethylation and Allylation Reactions
Authors: Marliyana Soerya Dewi , Firdaus Maulidan , Wartono Muhamad Widyo , Utami Diana Inas , Apriani Uly Wulan
Published: January 2025

Temu Kunci (Kaempferia pandurata Roxb.) is one of the plants from the Zingiberaceae family that contains secondary metabolites derived from flavonoids. Studies on the bioactivity of flavonoid compounds from this species have shown various biological activities such as antibacterial, antioxidant, antiviral, antitumor, antipyretic, anti-inflammatory, analgesic, and insecticidal properties. Pinostrobin (5-hydroxy-7-methoxy flavanone) (1) is the major flavonoid found in the rhizomes of this plant and has been successfully derivatized through ethylation and allylation reactions. Two compounds were obtained from the ethylation reaction, namely 5-ethoxy-7-methoxy flavanone (2) and 4'-ethoxy-6'-methoxy chalcone (3), while from the allylation reaction, 5-allyloxy-7-methoxy flavanone (4) and 6-allyl-7-methoxy flavanone (5) were obtained. Compounds 2, 3, 4, and 5 were tested for their antibacterial activity against the Gram-positive bacterium Staphylococcus aureus ATCC 25923 and the Gram-negative bacterium Escherichia coli ATCC 25922 using the agar diffusion method. The results of the inhibition zone measurements showed that compounds 2, 3, 4, and 5 were not active against S. aureus ATCC 25923 and E. coli ATCC 25922.
Thrombomodulin and Lactate Dehydrogenase as Potential Predictors of Leg Ulcers in Sickle Cell Disease
Authors: Okoye Helen C. , Ocheni Sunday , Eweputanna Lisa I. , Nwagha Theresa U. , Ejezie Chioma S. , Nonyelu Charles E. , Nnachi Oji A. , Obodo Onochie I. , Awodu Omolade A.
Published: January 2025

Abstract

Background:

Endothelial dysfunction, hypercoagulability, hemolysis, and vasculopathy are involved in the pathogenesis of sickle cell leg ulcers (SCLUs). Understanding these processes is crucial for developing effective strategies to manage and prevent SCLU.

Objectives:

To evaluate the plasma levels of thrombomodulin (TM) in patients with SCLU, determine if TM levels have any association with SCLU and its severity, and determine if TM has any association with markers of hemolysis.

Materials and Methods:

This was a cross-sectional analytical study carried out among patients with SCLU and their age-matched sickle cell disease (SCD) patients without leg ulcers. Venous blood samples were collected for the determination of TM and lactate dehydrogenase (LDH) levels. Statistical significance across means was determined using independent t tests and the one-way analysis of variance (ANOVA). Pearson’s correlation and linear regression analysis were used to determine the relationship between variables.

Results:

Of the 82 patients with SCD, 41 had SCLU (test group), and 41 had no SCLU (control group). Their mean age was 33.3 ± 9.0 and 33.0 ± 8.5 (P = 0.30), respectively. There was no significant statistical difference between plasma levels of TM and number (P = 0.191) and severity (P = 0.148) of SCLU. Seventy-three (89%) SCD patients had LDH concentration above the reference limit of normal, and 9 (11%) were within normal limits (P = 0.002). None of the test (SCLU) group patients had normal LDH values.

Conclusion:

SCLU is associated with higher levels of LDH, whereas plasma TM levels showed no association with the occurrence and severity of SCLU.
Products of commutators in matrix rings
Authors: Brešar Matej , Gardella Eusebio , Thiel Hannes
Published: January 2025

Let R be a ring and let

$n\ge 2$

. We discuss the question of whether every element in the matrix ring

$M_n(R)$

is a product of (additive) commutators

$[x,y]=xy-yx$

, for

$x,y\in M_n(R)$

. An example showing that this does not always hold, even when R is commutative, is provided. If, however, R has Bass stable rank one, then under various additional conditions every element in

$M_n(R)$

is a product of three commutators. Further, if R is a division ring with infinite center, then every element in

$M_n(R)$

is a product of two commutators. If R is a field and

$a\in M_n(R)$

, then every element in

$M_n(R)$

is a sum of elements of the form

$[a,x][a,y]$

with

$x,y\in M_n(R)$

if and only if the degree of the minimal polynomial of a is greater than

$2$

.
Compactifications of pseudofinite and pseudoamenable groups
Authors: Conant Gabriel , Hrushovski Ehud , Pillay Anand
Published: January 2025

We first give simplified and corrected accounts of some results in work by Pillay (2017) on compactifications of pseudofinite groups. For instance, we use a classical theorem of Turing (1938) to give a simplified proof that any definable compactification of a pseudofinite group has an abelian connected component. We then discuss the relationship between Turing’s work, the Jordan–Schur theorem, and a (relatively) more recent result of Kazhdan (1982) on approximate homomorphisms, and we use this to widen our scope from finite groups to amenable groups. In particular, we develop a suitable continuous logic framework for dealing with definable homomorphisms from pseudoamenable groups to compact Lie groups. Together with the stabilizer theorems of Hrushovski (2012) and Montenegro et al. (2020), we obtain a uniform (but non-quantitative) analogue of Bogolyubov’s lemma for sets of positive measure in discrete amenable groups. We conclude with brief remarks on the case of amenable topological groups.
Marine Mammals Sightings at High Latitudes in the Barents Sea, the Northeastern Arctic
Authors: Sözen Mustafa , Uluduz Nastassia , Vishnyakova Karina , Yanchukov Alexey
Published: January 2025

The Barents Sea, an important area for marine mammals, has changed due to climatic factors and increasing human activities. Information on the distribution of marine mammals and monitoring of areas of their high occurrence are essential for understanding population dynamics and informing conservation efforts. Survey data for occurrence of marine mammals were collected in the Barents Sea in the vicinity of the Svalbard Archipelago over 17 days in July, 2022 during the second multidisciplinary Turkish scientific Arctic expedition onboard the PolarXplorer. In total, 42 sightings of 6 cetacean species, 11 sightings of 4 pinniped species, and 2 sightings of polar bears (Ursus maritimus) were recorded during 110 hours of dedicated observation effort. White-beaked dolphins were sighted more often than the other cetacean species (χ2=30, P<0.05). The walrus was the most sighted species of pinnipeds. The encounter rate was 2.2 groups/100 nm for toothed whales, and 0.48-1.09 groups/100 nm for baleen whales. The sighted marine mammals mostly stayed as single individuals or pairs, while walruses were observed in groups of up to 120 individuals. Photo-identification data were collected and 35 humpback whale individuals were identified in the Arctic feeding area between 69.593973°N and 81.463930°N latitude; 5.443173°E and 36.833474°E longitude. Four individuals matched the existing records in the Happywhale catalogue. Our study contributes to the knowledge of occurrence and migration patterns of marine mammals in the Arctic region under rapid climate-mediated change.
The Effects of Territorial Usage on Polar Regıons and Polar Policies of Türkiye
Authors: Cihan Soysal Ceren , Yavasoglu Hasan Hakan
Published: January 2025

Rising temperatures in the Arctic and Antarctic, driven by climate change, have opened new land and sea routes, posing significant threats to the biodiversity and fragile ecosystems in these regions. This article examines the impacts of climate change in the polar regions, emphasizing the importance of protecting aquatic ecosystems and addressing inter-country ownership and utilization policies. The study highlights that, beyond safeguarding economic and political rights, the demarcation of property boundaries, marine cadastre, and other utilization strategies are essential to ensuring the sustainability of aquatic ecosystems. By analyzing the Turkish Cadastre System alongside those of countries near Antarctica and prominent nations recognized for their advanced cadastral systems worldwide, 13 countries were identified for detailed examination. The findings underscore the potential benefits of establishing marine protected areas and adopting ecosystem-oriented management approaches within the framework of international arrangements, such as the Arctic Council and the Antarctic Treaty System (ATS). Furthermore, the article stresses the importance of enhancing Türkiye`s scientific research and policy efforts in the polar regions, ensuring that activities are conducted in alignment with environmental responsibility. The text emphasizes the necessity for human activities in polar regions to prioritize both ecosystem sustainability and international collaboration.
What is the Main Reason Why the Arctic Route is Developing Slower than Expected?
Authors: Altinpinar İshak
Published: January 2025

Arctic shipping routes attract increasing curiosity because of their potential to create profitable connections between East Asia and West Europe. However, there are many factors why this interest is not sufficiently reflected in the numbers. For this reason, in this article, the main obstacles to the development of the Northern Sea Route (NSR) as a significant shipping route covering Asia-Europe were evaluated using the Analytical Hierarchy Process (AHP), a multi-criteria decision-making method (MCDM). The results indicate that economic viability (30.5%) is a critical challenge, with high operational costs and limited seasonal access undermining the NSR's competitiveness. Environmental and safety issues (29.6%) and ecological concerns (15.7%) also pose major risks due to unpredictable weather, insufficient search and rescue capabilities, reliance on icebreakers, and threats to fragile Arctic ecosystems. Infrastructure limitations (11.3%) and political and regulatory complexities (7.0%) further restrict usage, while limited international acceptance (5.9%) reflects the NSR's lack of integration into global supply chains. The financial nature of transportation is critical in terms of costs. Therefore, the economic viability barrier must be overcome first. It will require substantial investment, new regulations, and international cooperation to make NSR as a potential trade route.
К теории нормальных форм
Authors: Kozlov Valery Vasil'evich
Published: January 2025

Доказана оценка числа линейных коммутирующих полей симметрий систем дифференциальных уравнений, приведeнных к нормальной форме Пуанкаре-Дюлака. Показано, что если имеется полный набор коммутирующих аналитических полей симметрий с независимыми линейными частями, то преобразование к нормальной форме задается сходящимися степенными рядами.
О гамильтоновых проективных бильярдах на границах произведений выпуклых тел
Authors: Glutsyuk Alexey Antonovich
Published: January 2025

Пусть $K\subset\mathbb R^n_q$, $T\subset\mathbb R^n_p$ - два ограниченных строго выпуклых тела (открытые подмножества) с $C^6$-гладкой границей. Рассматривается произведение $\overline K\times\overline T\subset\mathbb R^{2n}_{q,p}$, снабженное стандартной симплектической формой $\omega=\sum_{j=1}^ndq_j\wedge dp_j$. Орбиты $(K,T)$-бильярда - это непрерывные кривые на границе $\partial(K\times T)$, пересечения которых с открытым всюду плотным подмножеством $(K\times\partial T)\cup(\partial K\times T)$ касаются характеристического поля направлений, задаваемого ядрами ограничений симплектической формы $\omega$ на касательные пространства к границе. Для любой точки $(q,p)\in K\times \partial T$ характеристическая прямая в $T_{(q,p)}\mathbb R^{2n}$ порождается вектором $(\vec n(p),0)$, где $\vec n(p)$ - внешний нормальный вектор к $T_p\partial T$. Аналогичное утверждение выполнено для $(q,p)\in\partial K\times T$. Проекция каждой орбиты $(K,T)$-бильярда на $K$ является орбитой так называемого $T$-бильярда в $K$. В случае, когда тело $T$ центрально-симметрично, это - бильярд в пространстве $\mathbb R^n_q$, снабженном структурой финслерова пространства Минковского, "двойственной к $T$". Соответствующий финслеров закон отражения был введен в совместной статье С.Л. Табачникова и Е.А. Гуткина в 2002 г. Исследование орбит $(K,T)$-бильярдов тесно связано с симплектической изопериметрической гипотезой К. Витербо (контрпример к которой был недавно построен в совместной работе П. Хаим-Кислев и Я. Островера) и со знаменитой гипотезой Малера из выпуклой геометрии. В настоящей работе рассматривается специальный случай, когда закон отражения $T$-бильярда является проективным законом отражения, введенным С.Л. Табачниковым, т.е., задается проективными инволюциями проективизированных касательных пространств $T_q\mathbb R^n$, $q\in\partial K$. Показано, что это происходит в том и только в том случае, когда $T$ - эллипсоид, или, что эквивалентно, когда все $T$-бильярды одновременно аффинно эквивалентны евклидовым бильярдам. В качестве приложения приведены аналогичные результаты для финслеровых бильярдов.
Математическое моделирование динамики спазера с нарушенной инверсионной симметрией в низкочастотном монохроматическом поле
Authors: Soldatov Andrey Vladimirovich
Published: January 2025

В рамках модельного подхода исследован спектр излучения элементарного спазера (дипольного нанолазера) ниже порога
генерации, взаимодействующего с внешним управляющим монохроматическим низкочастотным полем. Математическая модель
спазера включает в себя одну плазмонную моду колебаний металлической наночастицы, взаимодействующей с одноэлектронной асимметричной полупроводниковой двухуровневой квантовой точкой с пространственно нарушенной инверсионной симметрией, инверсная заселенность которой поддерживается некогерентной накачкой, а также диссипативное окружение, с которым взаимодействует как плазмонная наночастица, так и квантовая точка. Показано, что посредством варьирования амплитуды и частоты низкочастотного поля можно эффективно управлять спектром излучения спазера.
О конформных координатах $W^{2,2}$ иммерсий. Контрпример
Authors: Plotnikov Pavel Igorevich
Published: January 2025

В работе изучаются изотермические координаты для иммерсий двумерных многообразий в евклидово пространство. Рассматривается класс иммерсий с квадратично интегрируемой второй фундаментальной формой, которые также называются $W^{2,2}$ иммерсиями. В литературе распространено утверждение о том, что такого рода иммерсии обладают изотермическими координатами с равномерно ограниченным логарифмом конформного фактора. В настоящей статье показывается, что это неверно. Мы приводим пример иммерсии двумерной сферы в трехмерное евклидово пространство, для которой логарифм конформного фактора не ограничен. Причина этого явления состоит в том, что иммерсии с квадратично интегрируемой второй квадратичной формой не допускают гладкую аппроксимацию. Другими словами, они не удовлетворяют условиям теоремы Торо о би-липшицевых конформных координатах.
Замечание о притяжении эллипсоида в сферической Вселенной
Authors: Albouy Alain
Published: January 2025

Классическая теорема гласит, что два конфокальных эллипсоида, каждый из которых обладает распределением массы по поверхности, называемым гомеоидальным, оказывают одинаковую ньютоновскую силу на внешнюю точку, если они имеют одинаковую общую массу. Мы распространяем эту теорему на сферическую геометрию, адаптируя забытое доказательство классической теоремы Чарльза. По сравнению с существующими результатами, это немного более сильное утверждение с гораздо более коротким доказательством.
Центральные расширения алгебр Ли, динамические системы и симплектические нильмногообразия
Authors: Taimanov Iskander Asanovich
Published: January 2025

Описаны связи уравнений Эйлера на центральных расширениях алгебр Ли с уравнениями Эйлера на исходных, расширяемых, алгебрах. Рассмотрена специальная бесконечная последовательность центральных расширений нильпотентных алгебр Ли, строящихся по алгебре Ли формальных векторных полей на прямой, и описаны орбиты коприсоединенных представлений для этих алгебр. С помощью компактных нильмногообразий, построенных по этим алгебрам И.К. Бабенко и автором, показано, что накрывающие группы Ли для симплектических нильмногообразий могут иметь любой ранг как разрешимые группы Ли.
Analisis Kemampuan Literasi Digital Biologi Dan Hasil Belajar Kognitif Peserta Didik Kelas XI MIPA Madrasah Aliyah Negeri 1 Kota Ternate
Authors: Amin Astuti Muh , Umasugi Nur'ani , Taheer Tamrin
Published: January 2025

Along with the development of the 21st century, students are required to have high-level thinking skills, digital literacy, communication skills, personal and social responsibility. The objectives of the study: 1) to measure the level of digital literacy in biology and, 2) to measure the level of cognitive learning outcomes of class XI MIPA students at Madrasah Aliyah Negeri 1 Ternate City. This study was conducted using a descriptive quantitative research type. The population in this study was 115. The sampling technique was selected randomly in class XI MIPA, the selected samples were class XI MIPA 2 (28) and XI MIPA 4 (21) which totaled 49. The instruments used were a 32-item digital literacy questionnaire and 10 essay-type cognitive learning outcome test questions. The research data analysis technique used descriptive statistics. The results of the study showed a level of digital literacy ability in biology with a percentage of 2.04% in the very high category, 61.22% in the high category, 36.74% in the moderate category; 0% low category and 0% in the very low category. For cognitive learning outcomes obtained 53.06% in the very high category, 34.70% high, 10.20% sufficient, 21-40% in the low category, and 0% very low. Digital literacy should be used in useful things especially among students to be consumed both in the realm of education and society. For this reason, it is hoped that the development of digital literacy will continue to be carried out by schools, families and other institutions
A Sociological Perspective on Computer Science in Enhancing Workplace Efficiency: Implications for the Digital Economy and Nation Building
Authors:   Taraba State Polytechnic, Suntai, Etaba Okimba Peter , A. Abubakar Joshua John ,   Ahmadu Bello University, Zaria, Nigeria, Ishaya Gani Awudu ,   Taraba State Polytechnic, Suntai, David A. Omagu ,   Kwararafa University, Wukari, Nigeria, Walla Randy ,   Taraba State Polytechnic, Suntai
Published: January 2025

This paper investigates the intersection of sociological perspectives and computer science in the workplace, emphasizing how technology adoption can enhance efficiency and contribute to the digital economy. Through a qualitative analysis of contemporary case studies, the paper highlights the social dynamics affecting technology integration and argues for a holistic approach considering cultural, organizational, and socioeconomic factors in national development strategies.
Semantic Analysis of Legal Documents in the Memorandum of Understanding (Mou) of The Indonesian Ministry of Health
Authors: Akrimni Fida rika , Rahayuningsih Retno
Published: January 2025

The use of language in a MoU requires precision so that the message conveyed can be understood clearly, which ultimately supports the achievement of effective cooperation. By understanding the denotative and connotative meaning, parties entering into cooperation agreements in the business sector can better understand the contents of the MoU document. The research method used in this research is a descriptive method with qualitative data analysis. This research will analyze the denotative meaning and connotative meaning based on three stages of interpretation, namely literal meaning, explicature and implicature. The data source used is the Memorandum of Understanding (MoU) of the Indonesian Ministry of Health, from three different MoUs, namely the Danish MoU, Japan MoU and Tanzania MoU. The results of this research found denotative and connotative meanings in each MoU document. In the Danish MoU research there was 60% Denotative Meaning, 40% Connotative Meaning, while in the Japanese MoU research there was 50% Denotative Meaning, 50% Connotative Meaning, and the results found in the Tanzanian MoU research were 62.5% Denotative Meaning and 37.5% % Connotative Meaning. Of the three Memorandums of Understanding (MoU), the denotative meaning is more dominant than the connotative meaning.
Poéticas sensíveis sobre o percurso
Authors: Kumm Rosely , Brambati Alice
Published: January 2025

Preservar a memória de fatos culturais, por meio de constructos que comemoram, narram ou preservam, são práticas que dizem respeito a todas as sociedades humanas. Com essa mesma pretensão, o presente relato apresenta uma experiência em campo vivenciada durante a caminhada tradicional dos “Passos de Anchieta”, que busca evidenciar como a Arte Pública e suas respectivas manifestações culturais de caráter imaterial, podem influenciar na percepção espacial, fortalece a conexão entre a comunidade e a paisagem local.
Watu conta um conto
Authors: Damiani Sarah Rodrigues , Barbosa Paula , Sanmartin Stela Maris
Published: January 2025

A partir do campo das interartes, o presente ensaio apresenta um trabalho de foto-performance denominado “Watu conta um conto”. Realizada sobre as margens do Rio Watu, popularizado como Rio Doce, em Colatina-ES, a proposta é elaborada entre o movimento da performer e a captura da fotógrafa. É de pretensão do presente trabalho explorar a imaginação do espectador, associando símbolos e imagens de forma sensível.
College Promotion Strategy
Authors: Fajerin Muhammad , Gunarto Muji , Helmi Sulaiman
Published: January 2025

Promotion of higher education institutions is an important aspect in attracting prospective students and building a positive image of the institution. In an era of intense competition and rapid development of information technology, effective promotion strategies are the key to success for higher education institutions. This study aims to analyze various promotion strategies that can be implemented by higher education institutions to increase the attraction and enrollment of new students. Through SWOT analysis, market segmentation, and the application of various promotion methods, this study provides recommendations that can help higher education institutions formulate better marketing strategies. With an approach that focuses on evaluating and adjusting strategies, higher education institutions are expected to be able to compete effectively in the increasingly competitive higher education market.
Drug Rehabilitation and Educational Tourism Center
Authors: Yaako Razi , Tee Abdullah Mohd Ridhuan , Lateh Hanif Md , Che Noh Noorsafuan
Published: January 2025

Malaysia continues to face rising rates of drug addiction, particularly among the Malay majority, despite substantial governmental efforts and funding aimed at eradicating the issue. Traditional rehabilitation approaches have demonstrated limited success, underscoring the need for innovative strategies. This paper explores the integration of drug rehabilitation centers with educational tourism packages as a novel approach to enhance addiction recovery programs. The proposed method leverages Malaysia’s rich natural landscapes and cultural heritage to offer recovering addicts new experiences, foster familial bonds, improve social skills, and boost self-esteem. A comprehensive analysis of existing rehabilitation practices and educational tourism models was conducted, involving a review of literature, government reports, and case studies. The study develops structured tourism packages in collaboration with government agencies, non-governmental organizations (NGOs), and private tourism operators, tailored to the needs of recovering addicts. The findings indicate that integrating educational tourism into rehabilitation programs significantly enhances recovery by offering environmental changes that mitigate relapse triggers and improve psychological well-being. The involvement of family members further strengthens emotional support systems and addresses underlying relational issues.

The study emphasizes the importance of post-rehabilitation programs, continuous assessment, and skill development to ensure sustained recovery and societal reintegration. In conclusion, this innovative collaboration between rehabilitation centers and educational tourism offers a cost-effective, impactful strategy to address drug addiction in Malaysia by addressing the physical, mental, and spiritual dimensions of recovery. This approach holds substantial promise for improving rehabilitation outcomes and contributing to the nation’s overall well-being and security.
Мобильное приложение для нейропсихологических игр с применением методов компьютерного зрения
Authors: Носков Н. Ю.
Published: January 2025

В современном мире виртуальные платформы становятся все более важными инструментами для повышения когнитивных возможностей и поддержания здоровья мозга. Нейропсихологические программно-аппаратные комплексы представляют собой инновационный и перспективный подход к тренировке умственных способностей. В данной статье предложена методика выявления и развития когнитивных навыков на основе методов компьютерного зрения путем разработки мобильного приложения для нейропсихологических игр. Данный подход позволит использовать камеру смартфона или планшета для взаимодействия с игровым процессом, определяя движения пользователя и реагируя на них. Такой метод открывает новые возможности для создания интерактивных игр, тренирующих различные когнитивные навыки, такие как внимание, память, решение логических задач. Одним из ключевых преимуществ разработки мобильного приложения для нейропсихологических игр является его доступность и удобство использования. А использование методов компьютерного зрения в приложении позволит более точно проанализировать движения пользователя и предоставить достоверную и объективную информацию о своем нейропсихологическом состоянии.
БЕЛГІСІЗДІК ЖАҒДАЙЫНДАҒЫ БОЛЖАМДЫ БАСҚАРУ МОДЕЛЬДЕРІН ТАЛДАУ
Authors: А. Т. Кишубаева  , Н. М. Ахметжан  , С. Б. Назымбек
Published: January 2025

Мақалада белгісіздік жағдайында болжамды басқару модельдері зерттеледі. Зерттеу өндірістік процестердің тиімділігін арттыруға және кездейсоқтықтың әсерін азайтуға бағытталған. Зерттеудің негізгі мәселесі – кездейсоқ факторлардың және орта параметрлерінің өзгеруі жайында басқару жүйелерінің тиімділігін қамтамасыз ету. Зерттеу сыртқы әсер факторларының өзгерісін ескере отырып, басқару стратегияларын оңтайландыру жолдарын іздеуге бағытталған. Зерттеу барысында тиімділікті арттыру үшін математикалық модельдер мен алгоритмдер қолданылдып, белгісіздік жағдайындағы басқару жүйесі тиімділігі қарастырылды. Зерттеу нәтижелері басқару жүйелерінің параметрлеріне, өзгерістеріне қалай жауап беретінін көрсетеді. Бұл нәтижелер өндірістік және инженерлік жүйелерде басқару процестерін оңтайландыруға мүмкіндік береді. Зерттеу жұмысымыз басқару жүйелерінде белгісіздік жағдайларында болжамды басқарудың жаңа тәсілдерін ұсынды. Бұл өндірістік және техникалық процестерді басқарудың тиімділігін арттыруға бағытталған жаңа нәтижелерге әкелді. Зерттеу нәтижелері көрсеткендей, белгісіздік жағдайында басқару жүйелерінің бейімділігі мен икемділігін арттыру маңызды болып табылады. Осы арқылы басқару жүйелерінің сыртқы өзгерістерге жылдам әрі тиімді жауап беру қабілеті жоғарылайды. Мұндай зерттеулердің өндірістік процестердің тұрақтылығы мен тиімділігін арттыруда маңызы зор, себебі олар нақты уақытта стратегиялық шешім қабылдауға мүмкіндік береді.
Кілтті сөздер: болжамды басқару, стохастикалық жүйелер, робастикалық жүйелер, белгісіздік жағдайы, жұмсақ шектеулер, қатты шектеулер.