bluuebunny/crossref_metadata_2025_split huggingface dataset:
Qualification of the Attitude Control System of the E-band CubeSat EIVE
Authors: Eggert Marius , Bötsch-Zavřel Lena , Fugmann Martin , Holeczek Cedric , Koller Markus , Kranz Markus , Lengowski Michael , Löffler Thorben , Loidold Lukas-Maximilian , Maier Philipp , Meier Jakob , Mohr Ulrich , Müller Robin , Schweigert Robin , Starzmann Dominik , Steinert Michael , Zietz Martin , Schoch Benjamin , Haussmann Simon , Tessmann Axel , Freese Jens , Klinkner Sabine 
Published: March 2024

Abstract

The 6U CubeSat EIVE was developed for the verification of an E-band link from space to ground. Establishing sucha link presents challenging requirements for the development of an attitude control system of a CubeSat. To verify thefunctionality of its components, both the sensors and actuators, a number of tests were conducted prior to launch. Theseranged from simple functionality tests to performance tests and were accompanied by calibration campaigns. Qualificationof the attitude control algorithms proved to be a challenge, as a fitting simulator setup was not available. Therefore, limitedtests comparing the onboard software code to MatLab algorithms were used. This paper presents the types of testsconducted during the qualification campaign and their significance. On ground behavior is compared to in-orbit telemetry.The issues detected during ground tests as well as the issues achieving significant results from the tests are discussed andcompared to the problems detected during launch and early orbit phase. These comparisons illustrate the shortcomings ofsome of the tests executed and improvements for the validity of some tests are presented.
Estimating Quality of OCT Cubes using Phase-Level Unified Metric Evaluation (PLUME-OCT)
Authors: Milloz Alicia , Molas Grégoire , Paychère Yves , Bouillon Alexandre , Amiot Victor , Gurtler Laurent , Bardet James , Torrecillos Flavie , Bergmann Sven , Schlingemann Reinier , Vela Sofia Ortin , Meloni Ilenia , Tomasoni Mattia 
Published: March 2024

Abstract
Background and Aim
Optical coherence tomography (OCT) has emerged as a robust tool for in vivo retinal imaging, offering dynamic visualization of retinal microstructures in 3D (OCT Cube). This technology plays a crucial role in diagnosing, monitoring, and treating various ocular pathologies by allowing the extraction of retinal biomarkers. Quality Control (QC) measures have been developed to assess the quality of the individual 2D Scans (B-scans) that compose the OCT cube. However, during image acquisition, minor movements of the head or eye can degrade image quality by causing misalignment of individual B-scans with respect to one another, impacting the quality and reproducibility of 3D retinal biomarkers. New, reliable, automated, and efficient QC methods are needed to complement existing QC methods that evaluate the quality of 2D Scans.
Methods
We developed Phase-Level Unified Metric Evaluation for OCTs (PLUME-OCT), a novel method that quantifies the degree of misalignments of OCT cubes to produce quality metrics. PLUME-OCT was evaluated on two sets of 40 OCT cubes, manually annotated by four annotators. Additionally, we tested it on two cohort studies: the UK BioBank, comprising 88,247 individuals, and OphthalmoLaus (OL), consisting of 1,523 individuals.
Results
We demonstrated that PLUME-OCT effectively detects misalignments between B-scans. Furthermore, we established its applicability for filtering large datasets, generating metrics partially orthogonal to the Signal-to-Noise Ratio (Pearson’s r = -0.51). PLUME-OCT’s implementation is made available as a software package.
Conclusion
We introduce PLUME-OCT, a novel automated method designed for assessing the quality and volumetric coherence of OCT scans. PLUME-OCT operates without the need for reference images and utilizes minimal computational resources.
Application of kinetic models to study the sorption rate in the ‘ammonium ions–calcined sorbent’ system
Authors: Korotkova G. T. , Zakolyukina A. M. , Bushumov S. A. 
Published: March 2024

This study examines sorption kinetics for the extraction of ammonium ions from an aqueous solution under static conditions using 5 g of sorbent. The sorbent was obtained by calcining ash and slag waste accumulated in the ash dump following hydraulic ash removal. The initial concentrations of ammonium ions in the model solutions were 5, 20, 50 and 100 mg/dm3. The volume of the model solution was 50 cm3. For each initial concentration, the kinetic curves of the ammonium ion sorption at the sorption duration of 10, 30, 60, 90, 120, 150 and 180 min were obtained. The kinetic curves were processed using the Lagergren (pseudo-first order), Ho and McKay (pseudo-second order), Morris-Weber (diffusion) and Elovich kinetic equations. It was demonstrated that all kinetic equations adequately describe the experimental data. The linear correlation of the equations was given. The Boyd equation was used to determine the limiting stage in the Morris–Weber model. It was established that the external diffusion mechanism is limiting for the sorption of ammonium ions by a calcined sorbent. The Lagergren model, with a coefficient of determination R2 of 0.9801–0.9949, best described the experimental data on sorption kinetics. Sorption rate curves as a function of the adsorption value and sorption time were given. The latter are described by exponential and polynomial dependence according to the Lagergren model, polynomial dependence according to the Ho and McKay model and exponential dependence according to the Morris–Weber and Elovich models. The sorption rate was the highest at the initial stage of sorption for all dependencies, which is consistent with previous studies on the sorption of pollutants from aqueous solutions using various sorbents.
Anatomical characteristics and structural features of the optic nerve
Authors: Kiseleva T. N. , Baeva A. V. , Eliseeva E. K. , Lugovkina K. V. 
Published: March 2024

The review presents literature data about the anatomical structure, morphology and structural features of the optic nerve (ON). Four ON regions are detailed: intraocular, intraorbital, intracanalicular and intracranial. Specifically, the features of the intraocular region are outlined. It is divided into three zones: the surface nerve fiber layer, the prelaminar part and the lamina cribrosa of the sclera, which differ in histological structure and blood supply. The data on the coats of the intraorbital part include the details of the hard (dura mater), arachnoid and the soft (pia mater) coats. Other data represent the morphological structures of the intracanalicular and the intracranial parts of the ON. The distinctive features of blood supply in different ON regions are discussed.The information about the anatomical characteristics and structural features of the ON is important for studying the pathogenesis of the optic nerve´s damage.
Modern trends in the treatment of glaucoma
Authors: Petrov S. Yu. , Yakubova L. V. , Markelova O. I. 
Published: March 2024

In nearly all Russian regions, glaucoma ranks first among the causes of disability due to ophthalmic pathology, which is in line with global trends of glaucoma incidence growth and its leading position among the causes of irreversible blindness. Treatment of glaucoma is aimed at lowering intraocular pressure (IOP). This review presents the main current trends in the treatment of glaucoma: drug therapy, laser surgery, fistulizing, drainage and non-penetrating surgery, as well as the latest micro-invasive glaucoma surgery (MIGS).Currently, the pharmaceutical market offers many antihypertensive drops. Fixed-dose combinations of drugs have been proposed to increase treatment adherence, and effective drug delivery methods are being developed, which lower IOP with minimal side effects. Further development of laser surgery makes it both a method of choice for the initial treatment (selective laser trabeculoplasty) and expands its capabilities for various stages of glaucoma (micropulse cyclophotocoagulation). All this significantly reduces the frequency of classical macroinvasive antiglaucoma operations. The previously existing gap between conservative medical therapy and antiglaucoma surgery is filled by the newest MIHG procedures. In recent years, at all stages of primary open-angle glaucoma therapy, the emergence of new pharmaceuticals, methods and implants has been noted. These constitute the purpose of this publication.
Studying ocular blood flow in patients with retinitis pigmentosa using laser speckle flowgraphy
Authors: Okhotsimskaya T. D. , Neroeva N. V. , Zolnikova I. V. , Deryugina N. E. , Markelova O. I. 
Published: March 2024

Retinitis pigmentosa (RP) ranks first in the structure of hereditary retinal diseases. Vasoconstriction is one of the main ophthalmoscopic indications of PR. Laser speckle flowgraphy (LSFG) is a new non-invasive method that allows quantitative assessment of blood flow in the posterior pole of the eye.Purpose: to evaluate changes in blood flow as determined by the LSFG method in the area of the optic nerve head (ONH) and the macular area in PR patients.Material and methods. The study included 16 patients with PR aged 25 to 70 years. The control group consisted of 40 healthy volunteers, comparable in gender and age. Blood flow was determined using an LSFG-RetFlow device (Nidek), the main indicator of blood flow determined was MBR (Mean Blur Rate), which was measured for the entire study area, as well as separately for large vessels, and for the microvasculature. A wide range of pulse wave parameters determined by the tool instrument was also analyzed.Results. This study revealed a significant decrease in blood flow in PR patients compared with healthy individuals in different age groups and at different stages of the disease (p d 0.05). In patients with low visual acuity, the deficit of blood flow in the macular area was found to be more pronounced.Conclusion. LSFG is an effective method for determining ocular blood flow in PR patients. The data may indicate that a decrease in blood flow is an independent pathogenetic factor in the development of PD. In the future, the method can be used to assess the effectiveness of therapy of patients with PR.
Clinical and functional eye condition changes in the dry form of age macular degeneration depending on the AREDS stage
Authors: Teuvazhukova D. A. , Arutyunyan L. L. , Tlupova T. G. 
Published: March 2024

Purpose: to assess the functional state of the eyes in age-related macular degeneration depending on the AREDS classification stage.Material and methods. A clinical study of 60 patients (120 eyes) with the dry AMD form, aged 55.1 ± 4.2 years, involved 30 patients (60 eyes) aged 52.7 ± 3.9 years with AREDS 2 category (initial AMD stage, group1) and 30 patients (60 eyes) aged 57.9 ± 7.8 years with AREDS 3 category (intermediate AMD stage, group 2). The complex research involved visual acuity measurement, including the assessment of near vision in various illumination conditions according to the authors’ methodology, fluorescein angiography, refractometry, tonometry, optical coherence tomography (OCT), ultrasound duplex scanning of the eye; and an immunological study aimed at determining interleukins and interferons in blood serum.Results. Visual acuity was found to depend on test illumination in healthy subjects and to substantially drop at all illumination levels in AMD, especially in the 3rd stage. With the development of AMD, the activity of the immune response was recorded.The patients of groups 1 and 2 showed an increase in the inflammatory response and a depression of the anti-inflammatory response. In group 1, an increase was recorded in IL-I by 23.5% (p < 0.05), in IL5 by 25.4% (p < 0.05), and in IL8 by 19.9% (p < 0.05). In group 2, the value of these parameters exceeded the norm by 32.1, 39.5 and 25.4% (p < 0.05), respectively. The parameters of anti-inflammatory immunity (IL10 and TGF l) were lower than the reference level by 18.3 and 24.6% (p < 0.05) of patients of group 1 and by 24.3 and 30.75 (p < 0.05) of group 2. It was established that the degree of imbalance of the immune system is associated with the stage of AREDS. In group 2 patients with AREDS 3, the content of pro-inflammatory interleukins exceeded those of group 1: IL-I by 12.5% (p < 0.05), IL5 by 11.9% (p < 0.05), IL8 by 11, 2% (p < 0.05). IL10 and TGF l in group 2 were lower than in group 1 by 10.2 and 11.8% (p < 0.05).Conclusion. Near visual acuity measurement depending on test illumination may be used as a sensitive diagnostic test in AMD in patients. At an early stage of AMD development, a disorder in the immune defense is observed, taking the form of activation of the pro-inflammatory spectrum and depression of the anti-inflammatory component, as well as microcirculatory changes Homeostatic changes of the eye appear at an early stage of the disease and are progressing as the clinical picture is deteriorating. The changes are the greatest at patients with stage 3 of AREDS.
Effect of Wine and Grape Spirits from Table Grape Varieties on Sensory Profile of Grape Beverages
Authors: Sheludko Olga , Prakh Anton , Chemisova Larisa , Bakhmetov Roman 
Published: March 2024

Table grapes that have lost their marketable appearance are considered waste products. However, such grapes still possess some technological properties that make it possible to use them as a raw material for wine and grape spirits. This research featured the effect of the composition and technology of table grape alcohols on the volatile compounds and sensory profile
of grape beverages.
The study involved six white and six red grape beverages. In the test samples, the fermentation process was stopped by adding wine spirits and grape spirits obtained by rectification of distillates from table grapes. In the control samples, the procedure involved rectified grain alcohol. The physicochemical parameters of drinks and spirits were defined by standard methods. The highly volatile compounds were determined by gas chromatography. The sensory assessment was conducted by panelists from the Winemaking Research Center of the North-Caucasian Federal Scientific Center of Horticulture, Viticulture, and Winemaking.
In this study, the wine spirits and the grape spirits obtained from table grapes had no effect on the standard indicators, e.g., volatile acids and acetoin. However, they increased the mass concentrations of highly volatile compounds in the following manner: drinks with grain alcohol ˂ drinks with wine alcohol ˂ drinks with grape alcohol. The content of acetaldehyde increased by 10–14% while the contents of ethyl acetate, esters, and higher alcohols increased by 25–35, 4.5–8.5, and 15%, respectively. The furfural content increased by 0.4–1.4 mg/L in the samples with grape alcohol. The samples with white grape varieties acquired a more prominent floral-honey flavor whereas those with black grapes acquired hints of hazelnut and honey.
As a result of the study, it was found that wine alcohol and grape alcohol moderately increased the content of volatile compounds in drinks and had a positive effect on their sensory perception, which proves the expediency of their use in beverage technology.
Low-Temperature Preservation of Cherries
Authors: Guseynova Batuch , Musaeva Ragima 
Published: March 2024

Cherries (Prunus avium L.) are valued for their taste and nutritional properties. However, they are highly perishable. A low-temperature preservation technology can preserve cherries without spoiling their beneficial properties. This research experimentally substantiated the optimal methods and modes of freezing cherries, defined their refrigerated shelf-life, and identified varieties for low-temperature preservation.
The study featured cherries of eight varieties grown in the northern foothills of Dagestan. Fresh cherries served as control. Some cherries were frozen by immersion in a liquid solution of water, alcohol, and sugar (65:20:15) at –24°C. Others were frozen in bulk in air at –30, –33, and –35°C to be stored at –22°C for 3, 9, and 12 months. The nutritional profile was determined by standard methods of chemical analysis. The amount of juice lost during defrosting was assessed by the difference in weight before and after defrosting. The sensory evaluation involved a five-point scale.
The best nutritional profile belonged to the sample frozen in air at –35°C while the worst result was observed in the cherries frozen at –30°C. The cherries frozen in bulk in air at –33°C and those immersed in liquid coolant at –24°C demonstrated a poorer nutritional content (by 4.2–5.4%) than the sample frozen in air at –35°C. The sample frozen in air preserved 77.5–81.6% vitamin C, 83.7–89.0% pectin substances, 85.1–88.5% anthocyanins, and 81.4–86.4% sugar after 12 months of storage at –22°C. The sample frozen in liquid coolant retained 75.9–79.0% vitamin C, 84.4–88.2% pectin substances, 83.8–87.5% anthocyanins, and 80.3–84.7% sugar after 12 months of storage. The cherries of the Lezginka, Dagestanka, and Valery Chkalov varieties showed minimal changes after 12 months. The varieties of Buynakskaya, Krupnoplodnaya, and Polyanka could be recommended for nine-month storage. The varieties of Zhemchuzhnaya and Gudzon lost consumer attractiveness as early as after 3 months.
When frozen in bulk in air at –33°C and immersed in liquid coolant at –24°C, the cherries preserved their physicochemical properties after 3, 9, and 12 months of storage at –22°C. The study expanded the existing data about low-temperature preservation of cherries and their health benefits.
Analyzing Monetaray and Credit Policy of the Russian Federation in Conditions of Sancion Restrictions
Authors: Erokhina E. V. 
Published: March 2024

The article deals with problems connected with monetary and credit policy of the Russian Federation in new economic and geo-political conditions, such as mass sanction pressure on home economy, serious fluctuations of raw material prices, drastic changes in economic logistic chains and growing needs in budget expenditure. The author showed the role of monetary and credit sphere in the system of providing national economic security in the country, investigated tools of monetary and credit policy in conditions of sanctions and analyzed and assessed key trends that are realized by the Bank of Russia and aimed at overcoming economic after-effects of sanctions. The article fixed characteristics of the monetary and credit system which can be considered safe. Steps of the Bank of Russia aimed at overcoming economic after-effects and minimization of threats for the monetary and credit system were studied. It was shown that innovation development of the banking system is still a promising trend that includes the project of using the digital profile aiming at higher accessibility of finance resources and minimization of negative consequences of sanction restrictions. And finally, the author came to the conclusion that high degree of openness of such policy can increase confidence on the part of economic relation entities to the Central Bank of the Russian Federation as a key monetary and credit institution.
Strategi komunikasi humas Pemerintah Kota Yogyakarta dalam penyebaran informasi gerakan zero sampah anorganik
Authors: Nariswari Lolita Paramesti , Suranto Suranto 
Published: March 2024

Abstrak Tujuan penelitian ini adalah mendeskripsikan strategi komunikasi dan komponen kehumasan Humas Pemerintah Kota Yogyakarta dalam penyebaran informasi Gerakan Zero Sampah Anorganik. Penelitian ini merupakan penelitian deskriptif kualitatif. Informan dalam penelitian ini terdiri dari 2 pegawai humas. Hasil penelitian menujukkan bahwa: 1) strategi komunikasi dalam penyebaran informasi terbagi dari proses perencanaan, pelaksanaan kegiatan, dan proses evaluasi, (2) komponen komunikasi kehumasan mencakup pihak yang berperan dalam penyebaran informasi, pihak yang menjadi sasaran, serta media cetak, elektronik dan media sosial sebagai media penyebaran informasi Gerakan Zero Sampah Anorganik, media paling efektif yang digunakan Humas Pemerintah Kota Yogyakarta dalam penyebaran Gerakan Zero Sampah Anorganik, (3) dukungan dari masyarakat Kota Yogyakarta menjadi faktor pendukung keberhasilan penyebaran Gerakan Zero Sampah Anorganik, namun intesitas informasi yang ada di Kota Yogyakarta menjadi faktor penghambat, upaya yang dilakukan Humas Pemerintah Kota Yogyakarta tetap mengupayakan kegiatan sosialisasi dan sarasehan bank sampah secara berkelanjutan dan pembangunan Tempat Pengolahan Sampah Reduce-Reuse-Recycle (TPS3R).Kata kunci : strategi komunikasi, humas, zero sampah anorganik AbstractThe aim of this research is to describe the communication strategy and public relations components of the Yogyakarta City Government Public Relations in disseminating information about the Zero Inorganic Waste Movement. This research is a qualitative descriptive study. The informants in this research consisted of 2 public relations employees. The results of the research show that: 1) communication strategies in disseminating information are divided into planning processes, implementing activities and evaluation processes, (2) the public relations communication component includes parties who play a role in disseminating information, parties who are targeted, as well as print, electronic and media. social as a medium for disseminating information on the Zero Inorganic Waste Movement, the most effective media used by Yogyakarta City Government Public Relations in spreading the Zero Inorganic Waste Movement, (3) support from the people of Yogyakarta City is a supporting factor in the success of the spread of the Zero Inorganic Waste Movement, but the intensity of the information available in The city of Yogyakarta is an inhibiting factor, efforts made by Government Public Relations The City of Yogyakarta continues to strive for sustainable waste bank socialization and workshops and the construction of Reduce-Reuse-Recycle Waste Processing Sites (TPS3R).Keywords : communication strategy, public relations, zero inorganic waste