bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of thyroid function on periodontitis in U.S. population
Authors: han Wang , mingjun Zhang , Li nannan , miao Xiao , ka Chen , abulikemu Palizi , hongli Shi
Published: July 2023

Background
Thyroid dysfunction can lead to bone metabolism disorders and osteoporosis. Periodontitis is the most common oral disease, with alveolar bone resorption destruction as one of the main characteristics, and is associated with a variety of systemic diseases. Clinical and animal studies have shown that people with thyroid disorders are also at higher risk for osteoporosis. The progression of periodontitis may be accelerated by thyroid dysfunction because it may influence immune factor production and bone metabolism, which in turn inhibits alveolar osteogenesis and promotes bone resorption. This study analyze the correlative linkages between periodontitis and thyroid function.
Methods
This study used public data in two cycles of NHANES(2009–2010 and 2011–2012) for analysis. Participants were split into two groups on the basis of their status of periodontal condition: those without periodontitis and those who had it. We looked into the connection between periodontitis and thyroid function using a weighted logistic regression model. Then, using subgroup analysis, the potential contributing factors were explored.
Results
A total of 2352 subjects were included, and multiple regression models showed that after adjusting for all covariates, the low TSH level group was significantly associated with a 0.1-unit increase in periodontitis (adjusted for OR 1.48, 95% CI 1.01–2.17; p for trend = 0.048). According to the findings of the subgroup analysis, relationships between the two is remarkable despite variations in sex, age, vitamin D levels, and smoking status.
Conclusion
Periodontitis and thyroid function are tightly coupled, and that the onset of periodontitis is highly correlated with low TSH levels.
Clinical relevance: Patients with low serum TSH levels are more likely to have periodontitis. Stomatologists should focus more on thyroid disease patients, consider how systemic illnesses affect oral health, and enhance the standard of diagnosis and treatment.
On the Analysis of Physical Properties of Thermointerfaces Based on Hexagonal Boron Nitride Nanostructures for Cooling the Electronic Component Base of Micro- and Nanoelectronics
Authors: Prokhorov D. А. , Zuev S. М.
Published: July 2023

An empirical study of the physical properties (thermal conductivity, thermal diffusivity, and density) of thermophysical interfaces based on a hexagonal boron nitride (h-BN) nanopowder lattice for cooling electronic component bases in micro- and nano-electronics has been conducted. The physical properties were determined using the laser flash method and the relative method. The potential of compressed nanoparticles of hexagonal boron nitride as a thermophysical interface without an adhesive agent has been described. This article also provides a comparison of the physical properties of other thermophysical interfaces that are widely used today.
Microcomputed tomographic evaluation of 6 NiTi files on the pericervical dentin and the smallest dentin thickness zones in mesial root canals of mandibular molars: An in vitro study
Authors: Morales María de las Nieves Pérez , Sánchez José Antonio González , Elmsmari Firas , Durán-Sindreu Fernando , Salmon Phil , Jaramillo David E. , Fernández Juan Gonzalo Olivieri
Published: July 2023

Objectives: The aim of this study was to evaluate six files on the pericervical dentin (PCD) and the smallest dentin thickness zones (SDTZ) in mesial root canals of mandibular molars.
Materials and Methods: Sixty mesial roots with 2 canals were scanned before and after instrumentation with WaveOne Gold (WG), Reciproc Blue (RB), TRUShape (TS), XP-endo Shaper (XP), iRace (IR), and TruNatomy (TN). Surface, volume, structure thickness, SMI, and centroids were evaluated at the PCD, and the changes in the SDTZ were quantified. The data obtained werecompared using Wilcoxon and ANOVA with a 5% significance level.
Results: XP and TN were similar in all the parameters (P >.05) at the PCD, but TN showed significant differences from WG, RB, TS, and IR (P <.05), while XP showed significant differences from WG (P <.05) in volume, surface, and structure thickness. Regarding the changes in the SDTZ, the amount of dentin removed was similar between the groups in both canals at the middle 1/3, at the cervical 1/3 for MB canals, and in ML canals for RB, TS, XP, IR, and TN (P>.05). The action of WG was significantly different from that of XP and TN in the cervical 1/3 of the ML canal (P <.05).
Conclusions: XP and TN maintained better the anatomy, with minor changes at the PCD and SDTZ, while WG produced the largest changes. Centering at the PCD was maintained with all the files, and their performances were safe without risk of perforation.
Clinical Relevance: The choice of endodontic files is a relevant factor in the conservative performance of root canal treatments.
Trial Registration: No clinical trials were indicated in this study
Detecting Illegal Mining Activities in Zimbabwe through Earth Observation: A Case of Beitbridge District in Zimbabwe
Authors: Matingo Kumbirai
Published: July 2023

The Zimbabwean economy heavily relies on agricultural and mining activities which are the major boosters of the market and common business for regional and international trade [1]. These two sectors have seen a lot of investment potential and rise over the years and as such, illegal activities have since been on the rise in the mining industry. Across the country, most of the free, state land has become the breeding grounds for illegal mining activities, and this has caused quite several devastating effects and damage to the environment which have also contributed immensely to an uneven balance of biodiversity in the country [2]. The government on the other hand, has made various calls to action through its law enforcement agency to curb and spread of such illegal activities which pose a significant danger to both the environment and the economy [3]. Unfortunately, many of these efforts have been to no avail as many of these activities are going undetected leaving the law enforcement agencies together with the environmental protection agencies and partners without a starting point for countermeasures against such activities. Through Earth Observation technology and data, the government of Zimbabwe can be able to detect illegal mining activities and be in a better position to draft countermeasures which assist in curbing this national problem. On the other hand, Environmental Protection and Management agencies in Zimbabwe can be able to assess the damage caused by such activities among others for the benefit of crafting a sustainable future which leads to a balanced ecosystem which supports and promotes biodiversity at all levels. This paper provides a short case study of earth observation technology, techniques, and data applications in one of the well-known and well-assumed illegal mining hotspot towns of the country. It serves as a demonstration of how such technologies can be leveraged for development, enforcement and governmental approaches to issues affecting the environment and the future of today and tomorrow. The paper also gives a quantitative study and analysis of the damage that has been made by such illegal mining activities in the study area.
Desalination of sea water to potable levels without external energy input by electrochemical acid-base neutralisation
Authors: Cuesta Angel , Shibuya Jani , Macphee Donald
Published: July 2023

We report a flow battery that uses hydrogen as a charge carrier and makes use of the energy released in acid-base neutralisation to desalinate seawater and generate electricity, based on cheap and relatively safe electrolytes which are stored externally for scalable capacity. We demonstrate desalination of simulated seawater from 0.6 to 0.009 ± 0.005 M NaCl and successful desalination of sodium, potassium, magnesium, and calcium from real seawater to potable levels. The battery can also operate as a Reverse Electrodialysis (RED) system if the acid and base are substituted by neutral diluted aqueous solutions (e.g., freshwater), reaching power densities similar to state-of-the-art systems while using a much more environmentally friendly redox charge carrier, namely hydrogen, than those common in RED systems. Probably the most important characteristics of the reported system are, though (i) its flexibility, which allows easy tuning to favour either energy generation or degree of desalination by changing the flow rates and volumes of each individual channel and/or the discharge current and (ii) the possibility of putting hydrogen to work without consuming it while stored for later shipment, thereby producing a profit that can contribute to decreasing the cost of green hydrogen..
Effectiveness of public administration of the digital economy in Kazakhstan
Authors: Yeraliyeva Aruzhan , Dauliyeva Galiya , Andabayeva Gulmira , Nurmanova Biken
Published: July 2023

The digitalization of the economy has become one of the modern concepts in many countries and added urgency for governments to embark on a new path for effective digital and data governance. This study aims to examine the effectiveness of public administration of the digital economy in Kazakhstan, focusing on the policies, regulations, and strategies implemented by the government to support the development of this sector. The paper also explores the challenges faced by the government and the private sector in implementing these policies and regulations, including issues related to infrastructure, human capital, and the regulatory environment. It uses interdisciplinary, analytical, and systemic approaches, as well as desk research, analysis of materials of international organizations, and analysis of legal documents of the Republic of Kazakhstan and data from expert surveys. Thus, the results indicate the main scientific categories of the digital economy. Modern trends in the development of the digital economy in the world and the Republic of Kazakhstan have been identified. The results also show key performance indicators of public administration, assess the effectiveness of public administration of the digital economy in Kazakhstan, and offer directions for improving the efficiency of public administration of the digital economy. The study concludes by offering recommendations for policymakers to enhance the effectiveness of public administration of the digital economy in Kazakhstan.
Proteasome as a Drug Target in Trypanosomatid Diseases
Authors: Silva Mariana Luiza , de Santiago-Silva Kaio Maciel , Fabris Marciéli , Camargo Priscila Goes , de Lima Ferreira Bispo Marcelle
Published: July 2023

Some diseases caused by trypanosomatid parasites, like Leishmaniasis, Chagas Disease,
and Human African Trypanosomiasis (HTA), are challenging to manage, mainly concerning pharmacological
therapy because they are associated with vulnerable populations. Unfortunately, there
is a lack of significant investments in the search for new drugs. Therefore, one of the strategies to
aid the discovery of new drugs is to identify and inhibit molecular targets essential to the parasite's
survival, such as the proteasome, which degrades most proteins in the parasite cells. Our study has
presented several proteasome inhibitors with various pharmacophoric cores, and two of them, 5,
and 13, have stood out in the clinical phase of treatment for leishmaniasis.
RESOURCE USE EFFICIENCY OF WHEAT SEED PRODUCTION: A CASE FROM CHITWAN, NEPAL
Authors: Tiwari Narayan Prasad , Dhungana Suryamani
Published: July 2023

Wheat is staple food for more than thirty percent of the world population and is also a rich source of minerals, proteins, vitamins and dietary fibers. Quality seed is the major reason behind the low productivity of wheat in Nepal.  The study was design to investigate the cost, return, and resource use efficiency of wheat seed production in Chitwan district of Nepal. The study used 160 randomly sampled sample of wheat seed producer. Cobb-Douglas production function and benefit cost ratio were used to estimate the resource use efficiency during wheat seed production through data collected using semi-structured interview schedule to meet the objective. The average total cost of wheat seed production with subsidy was NRs. 59440 per hectare and average total cost of wheat seed production without subsidy was NRs. 60731 per hectare. The yield in study area was found 2771.02 kg. The return, profit with subsidy and profit without subsidy from wheat seed production was NRs. 69275.49, NRs. 9835.04 and NRs. 8544.46 in the study area respectively. The benefit cost ratio of wheat seed production in the study area with subsidy was found 1.31 and 1.28 without subsidy. The wheat seed production was found increasing return to scale (RTS = 1.106) in the study area. Seed and Machine were underutilized and other inputs like Farmyard Manure (FYM), chemical fertilizer, labor and other cost were over utilized while producing wheat seed in Chitwan district. The study revealed we can increase profit by optimization of input uses.
Perspectives of Nephrologists on Gender Disparities in Access to Kidney Transplantation
Authors: Natale Patrizia , Hecking Manfred , Kurnikowski Amelie , Scholes-Robertson Nicole , Carrero Juan Jesus , Wong Germaine , Strippoli Giovanni , Jaure Allison
Published: July 2023

Background

Gender disparities in access to kidney transplantation are apparent, with women being up to 20% less likely to receive kidney transplant compared with men across different settings and socioeconomic backgrounds. We aimed to describe nephrologists' perspectives on gender disparities in access to kidney transplantation.

Methods

Fifty-one nephrologists (55% women) from 22 countries participated in semistructured interviews from October 2019 to April 2020. We analyzed the transcripts thematically.

Results

We identified three themes: caregiving as a core role (coordinators of care for partners, fulfilling family duties over own health, maternal protectiveness, and inherent willingness and generosity), stereotyping and stigma (authority held by men in decision making, protecting the breadwinner, preserving body image and appearance, and safeguard fertility), social disadvantage and vulnerability (limited information and awareness, coping alone and lack of support, disempowered by language barriers, lack of financial resources, and without access to transport).

Conclusions

Gender disparities in access to kidney transplantation are perceived by nephrologists to be exacerbated by gender norms and values, stigma and prejudice, and educational and financial disadvantages that are largely encountered by women compared with men across different socioeconomic settings.
ANALYTICAL AND INTERPRETATIVE PRESENTATION OF CHANT DE LINOS BY ANDRE JOLIVET
Authors: Nikolić Angelina
Published: July 2023

The composition Chant de Linos by André Jolivet was an important response to the shift in ideals and aesthetics from the time of the Second World War and continues to occupy the great attention of flutists to this day. Today's abundance of literature has enabled this approach to Jolivet's music in several different ways, but since the author of this text is a flautist himself, a significant part of the work will be devoted to the interpretive aspect through the explication of the practical application of the already elaborated facts. The presentation of the multi-layered aspects of the piece will be made with the help of various critical aspects that will shed light on the cultural and social aspects of Jolivet’s background, while also illustrating important poetical characteristics of his. Methods of artistic research such as historical, analytical, comparative and practical-performance method will be used in this work. Although the composer himself did not provide more extensive program content, we can consider that Chant de Linos belongs to program music, since it clearly evokes certain ideas and concepts. Mapping and defining specific non-musical content contains the first part of the text, while the second part will deal with its practical application. Therefore, the goal of the overall exegesis is to bring the performers to a deeper understanding of the composer's intentions in order to perform the most expressive and meaningful interpretation.
MUSICAL ABILITIES DEVELOPMENT: WHEN TO START MUSIC EDUCATION?
Authors: Nikolić Igor , Kodela Slobodan , Pindović Bogdan
Published: July 2023

Musical abilities are among the primary conditions for success in the field of music. It has been proven that musical abilities already begin to develop in the prenatal period and that different types of abilities have a specific developmental path. Therefore, it is necessary to remember the critical periods for learning music, i.e., time frames within which musical experiences have particular importance. In addition to the informal musical experiences gained in the preschool period, formal music education is undoubtedly one of the best ways to develop musical abilities. The paper discusses the specifics of the music education system in Serbia, more precisely, the age of students that can enroll in programs for various instruments or solo singing. The data presented in the paper points to the conclusion that students that enroll in primary music education at the age of 7 or 8 (which coincides with the most crucial period for learning music) will have better prospects for the timely development of musical abilities when compared to children who begin musical training later. However, it should be held in mind that musical abilities develop even before the start of formal musical training, so efforts should be made to provide children with diverse and valuable musical experiences in the preschool period.
A Flower-like VO2(B)/V2CTx Heterojunction as High Kinetic Rechargeable Anode for Sodium-Ion Batteries
Authors: Jin Xiaoyu , Huang Yongxin , Zhang Mengmeng , Wang Ziheng , Meng Qianqian , Song Zhihang , Li Li , Wu Feng , Chen Renjie
Published: July 2023

VO2(B) is considered as a promising anode material for the
next-generation sodium-ion batteries (SIBs) due to its accessible raw
materials and considerable theoretical capacity. However, the VO2(B)
electrode has inherent defects such as low conductivity and serious
volume expansion, which hinder their practical application. Herein, a
flower-like VO2(B)/V2CTx (VO@VC) heterojunction was prepared by a simple
hydrothermal synthesis method with in situ growth. The flower-like
structure composed of thin nanosheets alleviates the volume expansion,
as well as the rapid Na+ transport pathways are built by the
heterojunction structure, resulting in long-term cycling stability and
superior rate performance. At a current density of 100 mA g-1, VO@VC
anode can maintain a specific capacity of 276 mAh g-1 with an average
coulombic efficiency of 98.7% after 100 cycles. Additionally, even at a
current density of 2 A g-1, the VO@VC anode still exhibited a capacity
of 132.9 mAh g-1 for 1000 cycles. The enhanced reaction kinetics can be
attribute to the fast Na+ adsorption and storage at interfaces, which
has been confirmed by the experimental and theoretical methods. These
results demonstrate that the tailored nanoarchitecture design and
additional surface engineering are effective strategies for optimizing
vanadium-based anode.
Pengaruh Kualitas Pelayanan Dan Harga Terhadap Kepuasan Pelanggan Pada Grabfood Di Layanan Aplikasi Grab Di Kota Bandung
Authors: Akbar Try Oktora
Published: July 2023

This study to determine how much influence the service quality and price have on customer satisfaction. The research method used is descriptive and verification methods. The descriptive method in this research is used to find out how service quality, price and customer satisfaction at Grabfood in the Grab application service in Bandung City. While the verification method in this study is used to test the truth of the hypothesis in order to determine the effect of service quality on customer satisfaction at Grabfood in the Grab application service in Bandung City. From this research, it is known that the results of multiple regression analysis show that there is an influence between the variables of service quality and price on customer satisfaction which is systematically stated by statistics. The result of multiple correlation analysis shows that the value of R is included in a strong relationship between the variables of service quality, price and customer satisfaction.
Magma mingling textures in granitic rocks of the eastern part of the Strzegom-Sobótka Massif (Polish Sudetes)
Authors: Domańska-Siuda Justyna , Bagiński Bogusław
Published: July 2023

Many granitic intrusions display evidence of magma mixing processes. The interaction of melts of contrasting composition may play a significant role during their generation and evolution. The Strzegom-Sobótka massif (SSM), located in the Sudetes (SW Poland) in the north-eastern part of the Bohemian Massif of the Central European Variscides, exhibits significant evidence of magma mingling on the macro- and micro-scales. The massif is a composite intrusion, with four main varieties: hornblende-biotite granite (with negligible amount of hornblende) and biotite granite in the western part, and two-mica granite and biotite granodiorite in the eastern part. Field evidence for magma mingling is easily found in the biotite granodiorite, where dark enclaves with tonalitic composition occur. Enclaves range from a few centimeters to half a meter in size, and from ellipsoidal to rounded in shape. They occur individually and in homogeneous swarms. The mixing textures in the enclaves include fine-grained texture, acicular apatite, rounded plagioclase xenocrysts, ocellar quartz and blade-shaped biotite. The most interesting feature of the enclaves is the presence of numerous monazite-(Ce) crystals, including unusually large crystals (up to 500 μm) which have grown close to the boundaries between granodiorite and enclaves. The crystallization of numerous monazite grains may therefore be another, previously undescribed, form of textural evidence for interaction between two contrasting magmas. The textures and microtextures may indicate that the enclaves represent globules of hybrid magma formed by mingling with a more felsic host melt. Chemical dating of the monazite yielded an age of 297±11 Ma.
Diatomaceous ooze in a sedimentary core from Mariana Trench: implications for paleoceanography
Authors: Zhang Jinpeng , Witkowski Andrzej , Tomczak Michał , McCartney Kevin , He Gaowen , Zgłobicka Izabela
Published: July 2023

Diatomaceous ooze sampled from near the Mariana Trench sediment surface by gravity corer (Core JL7KGC05) revealed a high sedimentary abundance of Ethmodiscus rex (Rattray, 1890) Wiseman and Hendey, 1953 fragments and tropical open ocean planktonic diatom taxa including Azpeitia nodulifera (Schmidt, 1878) Fryxell and Watkins in Fryxell, Sims and Watkins, 1986 and Alveus marinus (Grunow, 1880) Kaczmarska and Fryxell, 1996. Subsurficial sediments from the ooze are assigned a Marine Isotope Stage 2 age, approximately at the Last Glacial Maximum. The occurrence of Ethmodiscus ooze suggests massive late Pleistocene blooms in the Northwestern Pacific Ocean and provides a plausible link to paleoceanographic and paleoclimatic changes related to Antarctic Intermediate Water mass, which carried a high dissolved silica content as silicon leakage that reduced dissolution rate of diatom frustules. Northward flow of Antarctic Intermediate Water was probably related to surface current migration and southward shift of the Northwest Pacific Gyre to form oligotrophic conditions that triggered Ethmodiscus rex blooms under unusual nutrient recycling conditions within the ocean system. This bloom hypothesis may help explain differential silica dissolution during the last glacial stage.
Neogene activity of the Outer Carpathians recorded by thrust-top basin deposits – an example from the Rzeszów area, Poland
Authors: Uroda Joanna
Published: July 2023

The Rzeszów thrust-top basin was formed on the active Skole thrust sheet of the Outer Carpathian fold-andthrust belt and filled with Miocene syntectonic sediments. New seismic 3D, well and field data were used to define the relationship between sedimentation and tectonic activity and to establish the synkinematic context of the Rzeszów basin-fill architecture. The basin evolution was controlled by the activity of the Carpathian frontal thrust and hinterland thrusts developed in the forelimbs of folds in the Skole thrust sheet, bounding the basin from the north and south, respectively. The activity of the frontal thrust resulted in hinterland-directed depocentre migration and tilting of the syntectonic stratigraphic sequence. Balanced cross-sections have indicated that during the last compressive stage of deformation, the syntectonic deposits filling the basin were shortened by c. 5%, which resulted in the formation of folds and contractional faults. The architecture of the syntectonic deposits and the development of contractional structures reflect the activity of thrusts bounding the basin during compressive deformation of the Carpathian orogenic belt.
Gastropods [Trochoidea: Trochidae Rafinesque, 1815 and Calliostomatidae Thiele, 1924 (1847)] from the middle Miocene of Ukraine, Central Paratethys
Authors: Nosowska Ewa
Published: July 2023

Over three thousand specimens representing the superfamily Trochoidea Rafinesque, 1815 [Trochidae Rafinesque, 1815 and Calliostomatidae Thiele, 1924 (1847)] from the upper Upper Badenian = Kosovian = lower Serravallian (middle Miocene) marine deposits of Ukraine, housed in the collections of the Polish Academy of Sciences Museum of the Earth in Warsaw (MZ), are studied herein. The abundant material has allowed for investigations of the intraspecific variation and revision of earlier determinations. As a result, 21 species belonging to 5 genera have been identified, described and illustrated, of which one is new [Clanculus (Clanculopsis) krachi sp. nov.] and one is left in open nomenclature. Granulifera O. Anistratenko, 2000 is considered a junior subjective synonym of Clanculopsis Monterosato, 1879; Granulifera pulla O. Anistratenko, 2000 is considered a junior subjective synonym of Monodonta tuberculata Eichwald, 1830; Gibbula sytovae Amitrov, 1961 is considered a junior subjective synonym of Trochus miocaenicus Mayer, 1853; Gibbula volhynica Friedberg, 1928 is considered a junior subjective synonym of Trochus novemcinctus von Buch, 1830; and Trochus buchii du Bois de Montpéreux, 1831 is suppressed in favour of the senior subjective synonym Trochus puschii Andrzejowski, 1830. The geographic distribution and stratigraphic ranges of the taxa are given. Six species are known only from the Polish-Ukrainian part of the Fore-Carpathian Basin. The protoconch features are systematically studied in the Trochidae and Calliostomatidae from this area for the first time.
The microcrinoid taxonomy, biostratigraphy and correlation of the upper Fredericksburg and lower Washita groups (Cretaceous, middle Albian to lower Cenomanian) of northern Texas and southern Oklahoma, USA
Authors: Gale Andrew Scott , Rashall Jenny Marie , Kennedy William James , Holterhoff Frank Koch
Published: July 2023

The stratigraphy of the upper Fredericksburg and lower Washita groups of northern Texas and southern Oklahoma is described, and biostratigraphical correlation within the region, and further afield, using micro­ crinoids, ammonites, planktonic foraminiferans and inoceramid bivalves is summarised. The taxonomy of the roveacrind microcrinoids is revised by the senior author, and a new genus, Peckicrinus, is described, with the type species Poecilocrinus porcatus (Peck, 1943). New species include Roveacrinus proteus sp. nov., R. morganae sp. nov., Plotocrinus reidi sp. nov., Pl. molineuxae sp. nov., Pl. rashallae sp. nov. and Styracocrinus thomasae sp. nov. New formae of the genus Poecilocrinus Peck, 1943 are Po. dispandus forma floriformis nov. and Po. dispandus forma discus nov. New formae of the genus Euglyphocrinus Gale, 2019 are E. pyramidalis (Peck, 1943) forma pyramidalis nov., E. pyramidalis forma radix nov. and E. pyramidalis forma pentaspinus nov. The genera Plotocrinus Peck, 1943, Poecilocrinus and Roveacrinus Douglas, 1908 form a branching phylogenetic lineage extending from the middle Albian into the lower Cenomanian, showing rapid speciation, upon which a new roveacrinid zonation for the middle and upper Albian (zones AlR1–12) is largely based. Outside Texas and Oklahoma, zone AlR1 is recorded from the lower middle Albian of Aube (southeastern France) and zones AlR11–CeR2 from the Agadir Basin in Morocco and central Tunisia. It is likely that the zonation will be widely applicable to the middle and upper Albian and lower Cenomanian successions of many other regions.
Hydrogeochemical modeling of water injection into an oil and gas well under high-pressure high-temperature (HPHT) conditions
Authors: Krogulec Ewa , Sawicka Katarzyna , Zabłocki Sebastian
Published: July 2023

Approximately 80% of water extracted from oil and gas deposits in Poland is disposed of by injection into the rock matrix. The aim of the model research was to predict both the hydrochemical reactions of water injected into wells for its disposal and the hydrogeochemical processes in the reservoir formation. The purpose of hydrogeochemical modeling of the hydrocarbon formation was also to determine the potential of formation waters, injection waters, and their mixtures to precipitate and form mineral sediments, and to determine the corrosion risk to the well. In order to evaluate saturation indices and corrosion ratios, the geochemical programs PHREEQC and DownHole SAT were used. The results of hydrogeochemical modeling indicate the possible occurrence of clogging in the well and the near-well zone caused mainly by the precipitation of iron compounds (iron hydroxide Fe(OH)3 and siderite FeCO3) from the formation water due to the presence of high pressures and temperatures (HPHT). There is also a high certainty of the precipitation of carbonate sediments (calcite CaCO3, strontianite SrCO3, magnesite MgCO3, siderite FeCO3) from the injection water within the whole range of tested pressures and temperatures. The model simulations show that temperature increase has a much greater impact on the potential for precipitation of mineral phases than pressure increase.
Tescheniceras gen. nov. (Ammonoidea) and the definition of the Valanginian/Hauterivian boundary in Butkov Quarry (Central Western Carpathians, Slovakia)
Authors: Vašíček Zdeněk
Published: July 2023

Jurassic and Lower Cretaceous successions of the Manín Unit of the Central Western Carpathians are exposed in Butkov Quarry in the Middle Váh Region, Slovakia. A significant part of the macrofauna belonging to neocomitid ammonites, formerly classified under the genus Teschenites Thieuloy, 1971, occurs in deposits spanning the Valanginian/Hauterivian boundary. The original definition of Teschenites was accompanied by uncertainties in the taxonomic and stratigraphic position of its original type species, i.e., Hoplites neocomiensiformis Uhlig, 1902. The present contribution focuses on and provides a possible taxonomic solution by establishing the new genus Tescheniceras. In Butkov Quarry, the new genus includes five species. Tescheniceras flucticulum (Thieuloy, 1977), the type species, is the most abundant. Tescheniceras callidiscum (Thieuloy, 1971), the subzonal species for the uppermost Valanginian (Thieuloy 1971b), occurs only sporadically. Because Acanthodiscus radiatus (Bruguiére, 1789), the index species for the basal Hauterivian (radiatus Zone) in the international ammonite zonation, does not occur in the locality, the basal Hauterivian is indicated by the first appearance of the genus Spitidiscus Kilian, 1910.
A silicoflagellate plexus associated with Bachmannocena diodon subsp. nodosa from the Eastern Equatorial Pacific (Ocean Drilling Program Leg 138)
Authors: Szaruga Adrianna , McCartney Kevin , Witkowski Jakub
Published: July 2023

Upper Miocene (~6 Ma) sediments from a north-south transect of Ocean Drilling Program Holes 848B, 849B, 850B, 851B across the equator in the Eastern Pacific Ocean record an episode of unusual skeletal variability associated with the silicoflagellate Bachmannocena diodon subsp. nodosa (Bukry) Bukry, 1987. Skeletons in this plexus persisted for between 55,000 and 75,000 years and include an arch across a 2-sided basal ring, a highly unusual morphology for the genus. Groups of skeletal morphotypes were common within the plexus episode, and occur in a systematic sequence that is consistent between sites. As a result of this study, silicoflagellates previously placed in the genus Neonaviculopsis Locker and Martini, 1986 are now considered part of the Bachmannocena diodon subsp. nodosa plexus.
Bashkirian Rugosa (Anthozoa) from the Donets Basin (Ukraine). Part 12. Concluding considerations
Authors: Fedorowski Jerzy
Published: July 2023

A detailed analysis of the upper Viséan, Serpukhovian and Bashkirian Rugosa of the Donets Basin confirms their Mississippian/Pennsylvanian turnover during the Eumorphoceras / Homalophyllites–Hudsonoceras Zone, as postulated earlier (Fedorowski 1981a). The deterioration of rugose corals, globally diverse in time and space in the late Viséan and Serpukhovian, has resulted in the patchy distribution of survivors and newcomers, present in the Bashkirian. Difficulties in inter-basinal communication and the isolation of some sites have resulted in a different content of Bashkirian Rugosa in particular patches, with only rare genera in common. New data has made it possible to document the appearance of the first late Carboniferous genera in the Donets Basin as early as the lower Voznessenkian Horizon (= lower Chokierian Substage), i.e., close to the beginning of the Bashkirian Stage. The two stages of diversification, established in the Bashkirian rugose corals of the Donets Basin, cannot find their counterparts elsewhere. A palaeogeographic overview of the most important sites of diversified rugose corals documents the need to re-examine many taxa, which should be based on complete specimen studies. This and the precise placement of taxa in the modern stratigraphy must be done in order to make rugose corals globally comparable. Simple repetitions of names, commonly used in general summaries, is strongly misleading in both stratigraphic and palaeogeographic reconstructions.
Calcareous nannofossil biostratigraphy and paleogeographic significance in the lower Maastrichtian of the Miechów Trough (southern Poland)
Authors: Ciołko Urszula , Gaździcka Elżbieta
Published: July 2023

Biostratigraphic analysis of calcareous nannofossils from the Pełczyska section in the Miechów Trough (southern Poland) has revealed that the entire section covers the lowermost Maastrichtian. The UC16bTP Tethyan subzone is designated based on the presence of Broinsonia parca constricta Hattner, Wind and Wise, 1980, reworked remains of Uniplanarius trifidus (Stradner) Hattner and Wise in Wind and Wise, 1983 and the simultaneous lack of Eiffellithus eximius (Stover) Perch-Nielsen, 1968. The studied section spans also the interval between the LO of Zeugrhabdotus praesigmoides Burnett, 1997 and the FO of Prediscosphaera mgayae Lees, 2007 (UC16 S3 Boreal subzone). Quantitative analysis of nannofossil assemblages has shown the dominance of cold water species (up to 50%), e.g., Micula decussata Vekshina, 1959, Prediscosphaera spp., Arkhangelskiella spp., Calculites obscurus (Deflandre) Prins and Sissingh in Sissingh, 1977 and Lucianorhabdus cayeuxii Deflandre, 1959. In the early Maastrichtian, the studied area was more influenced by cool water masses from the Boreal Province rather than by warm water from the Tethyan Province. The significant predominance of cold water taxa and the elevated presence of Prediscosphaera cretacea (Arkhangelsky) Gartner, 1968 also supports the hypothesis of climate cooling in the early Maastrichtian.
Unusual echinoid resting trace records change in the position of the redox boundary (Palaeogene of the Lesser Caucasus in Georgia)
Authors: Uchman Alfred , Lebanidze Zurab , Kobakhidze Nino , Beridze Tamar , Makadze Davit , Lobzhanidze Koba , Khutsishvili Sophio , Chagelishvili Rusudan , Koiava Kakha , Khundadze Nino
Published: July 2023

The first recognition of a tracemaker responding to a temporary shift in the redox boundary is recognized. This is recorded by a new trace fossil, Sursumichnus orbicularis igen. et isp. nov., which is established for mound-like structures on the upper surfaces of sandstone beds from the Borjomi Flysch (upper Paleocene–lower Eocene) in the Lesser Caucasus (Georgia). It is connected with the spatangoid echinoid burrow Scolicia de Quatrefages, 1849 and interpreted as a resting trace of the same tracemaker produced after moving up from a deeper position within the sediment. The resting is caused by an episode of unfavourable conditions related to shallowing of the redox boundary. The trace fossil is a component of the Nereites ichnofacies.
Depositional conditions of the Upper Younger Loess during the Last Glacial Maximum in central and eastern Europe
Authors: Dzierżek Jan , Lindner Leszek , Chlebowski Roman , Szymanek Marcin , Bogucki Andryi , Tomeniuk Olena
Published: July 2023

This paper is a summary of the results of research on the accumulation conditions of the Upper Younger Loess (LMg) in Poland and Bug loess (bg) in Ukraine from the maximum stage (MIS 2) of the Vistulian (Weichselian) Glaciation in central and eastern Europe. These studies included an analysis of the morphological (topographic) situation of the loess cover, its grain size and heavy mineral composition, the preserved structures of loess sedimentation as well as mollusc and pollen analyses of this loess. They revealed that the accumulation of Upper Younger Loess (UYL) might have been more dependent on the prevailing moisture conditions than previously thought. These conditions could have been caused by cold air masses from an ice sheet and warm air masses from the Mediterranean Sea and Atlantic coming together in the Carpathians and the Holy Cross Mountains and favouring the formation of dust storms and precipitation. In this process, a loading of loess dust (formed from local rocks weathering in periglacial conditions) by atmospheric moisture particles was especially significant. The moist substrate not only favoured the periodic development of vegetation and molluscs but also enabled the interception of dust and the accumulation of an increasingly thick loess cover. Westerly and south-westerly winds predominated in the UYL as indicated by the topographic position of loess patches and the mineral composition of the studied loess. Periodically an increased air circulation from the east and northeast occurred.
Recently formed arsenates from an abandoned mine in Radzimowice (SW Poland) and the conditions of their formation
Authors: Siuda Rafał , Januszewska Anna
Published: July 2023

In the mining galleries of the abandoned Au-As mine in Radzimowice, diverse groups of secondary arsenates crystallized recently. They form several characteristic assemblages. In the first of them the typical minerals are bukovskýite and melanterite. The second group of secondary arsenates includes scorodite, kaňkite, zýkaite, and pitticite. The third assemblage includes Co-Ni-Mg arsenates of the erythrite-annabergite-hörnesite series. The first assemblage crystallized in a zone with a very high activity of sulphate and arsenate ions and where the pH varies within a narrow range of 2.0–3.5. The second group of secondary arsenates formed in the acidic zone. The minerals identified here suggest pH variation within fairly wide ranges, from about 2.0 to 5.5. Contrary to the first and second mineral assemblage, the Co-Ni-Mg arsenates formed under different geochemical conditions. Their crystallization took place under weak acidic to neutral conditions.
The ammonite subgenus Pervinquieria ( Deiradoceras) van Hoepen, 1931 from the Upper Albian of KwaZulu-Natal, South Africa. Part I
Authors: Kennedy William James , Klinger Herbert Christian
Published: July 2023

The cosmopolitan Late Albian ammonite subgenus Pervinquieria ( Deiradoceras) van Hoepen, 1931, and its synonyms Cechenoceras van Hoepen, 1941 and Mimeloceras van Hoepen, 1944, originally based on material from northern KwaZulu-Natal, are reviewed. The type material of the type species, Subschloenbachia prerostrata Spath, 1921, is revised and reillustrated, as are its numerous synonyms.
Climate and vegetation changes recorded in the post Holsteinian lake deposits at Ossówka (eastern Poland)
Authors: Bińka Krzysztof , Szymanek Marcin , Nitychoruk Jerzy
Published: July 2023

Due to the long sedimentation period (about 70 000 y.) and the unique quality of the lake deposits represented by very long, monotonous layers of lacustrine chalk, the sequence at Ossówka is exceptional. We conducted highly-resolved pollen and isotope analysis of the 27-m-long, upper part of the sequence of the lake sediments covering the final stage of the Holsteinian and the early phases of the Saalian Complex (Marine Isotope Stages (MIS) 11–10). In the pollen profile three main forest interstadials (L PAZ O-3, O-5, O-7) and the intervening steppe – tundra stadials (L PAZ O-2, O-4, O-6, O-8) as well as numerous units of lower rank were identified. Interstadials were characterized mainly by the presence of well-established pine forest. Stadials in turn, represented steppe – tundra vegetation with very pronounced continental influences. Also, three clearly established phases of forest fires starting at the beginning of interstadials and gradually disappearing are interesting feature of the sequence. Fires of that scale are very rarely noted in the palynological spectra. The examined sequence is characterized by the high dynamics of changes in the post interglacial part of the profile. It provides, coupled with clear features of the Holsteinian succession and its duration, a reliable correlation with other terrestrial and marine archives.
Content-Based Recommender Systems Taxonomy
Authors: Papadakis Harris , Papagrigoriou Antonis , Kosmas Eleftherios , Panagiotakis Costas , Markaki Smaragda , Fragopoulou Paraskevi
Published: July 2023

In the era of internet access, recommender systems try to alleviate the difficulty consumers face while trying to find items (e.g. services, products, or information) that better match their needs. To do so, a recommender system selects and proposes (possibly unknown) items that may be of interest to some candidate consumer, by predicting her/his preference for this item. Given the diversity of needs between consumers and the enormous variety of items to be recommended, a large set of approaches have been proposed by the research community. This paper provides a review of the approaches proposed in the entire research area of content-based recommender systems, and not only in one part of it. To facilitate understanding, we provide a categorization of each approach based on the tools and techniques employed, which results to the main contribution of this paper, a content-based recommender systems taxonomy. This way, the reader acquires a quick and complete understanding of this research area. Finally, we provide a comparison of content-based recommender systems according to their ability to efficiently handle well-known drawbacks.
Risperidone-induced anaemia
Authors: CHAWATH SIDDARTHKUMAR , RAMDURG SANTOSH , BADIGER SHARAN , CHAUKIMATH SHIVAKUMAR P.
Published: July 2023

Risperidone is an atypical antipsychotic drug, which is used in schizophrenia and also to treat excitation and aggression in patients with delirium. Risperidone has a low risk of haematotoxicity because of its different chemical and pharmacological profile compared to other drugs such as clozapine. Haematological abnormalities have life-threatening complications, especially neutropenia, leucopenia and agranulocytosis, but their effect on erythrocytes in adults is less well known. We highlight the effect of risperidone on erythrocytes and the mechanism that leads to anaemia. To the best of our knowledge, this is the only report of 2 patients showing combinations of mechanisms leading to risperidone-induced anaemia.
KEMAMPUAN PEMECAHAN MASALAH SISWA PADA MATERI PERBANDINGAN DITINJAU DARI ADVERSITY QUOTIENT
Authors: Wahab M , Mirza Ade , Hamdani Hamdani
Published: July 2023

This research was based on the results of pre-research showed that students’ problem-solving abilities were still low, especially in comparison materials. Problem-solving abilities can be influenced by many factors, one of which is adversity quotient. One of the first steps that can be done to explore students’ problem-solving skills is to discuss how the problem-solving abilities that students currently have. The goal of this research is to know and to describe students’ problem-solving skills in comparison materials in class VII. Descriptive method is used in this study. The students of class VIII C of SMP Negeri 1 Teluk Keramat for the 2021/2022 school year were the subject in this study. Then they were sampled by 3 people from the climber type ada 3 people from the camper type. The data.collection.tools.in.this.study are subjective written tests in the form of essays and interview guidelines. The results revealed that in general, students’ math problem-solving skills were relatively low with an average score of 58,6 test scores. In this study, students who were able to complete all indicators of problem-solving.ability by 50% and students who had not been able to complete all indicators of problem-solving ability by 50%.
KAITAN INDEPENDENT LEARNING DENGAN KEMAHIRAN BELAJAR SISWA DIKAJI DARI OPEN ENDED QUESTION DALAM MATERI PERSAMAAN GARIS SINGGUNG
Authors: Siahaan Juan Antonio , Munaldus Munaldus , Fitriawan Dona
Published: July 2023

This study aims to determine the relationship of independent learning with students' learning skills assessed from open ended questions in the material of tanggent equations in SMAN 7 Pontianak. The method used is bivariate correlation. The sample used was 30 students of grade 12 science 4 at SMAN 7 Pontianak. The instruments used were independent learning questionnaires and student learning proficiency tests. the results of the study showed that grade 12 science 4 students were in the medium category of Independent Learning, in the moderate category of Student Learning Proficiency, and there was no relationship Between Independent Learning and Student Learning Proficiency with a Spearman Rank value of 0.11.
KESULITAN SISWA DALAM MENYELESAIKAN SOAL PEMAHAMAN KONSEP MATEMATIS PADA MATERI PERSAMAAN KUADRAT
Authors: Honey A Christy Armelda , Jamiah Yulis , Halini Halini
Published: July 2023

Tujuan dari penelitian ini adalah untuk menggambarkan kesulitan dan faktor penyebabnya yang dihadapi siswa ketika menyelesaikan soal pemahaman konsep matematis pada materi persamaan kuadrat. Metode penelitian digunakan dalam penelitian ini ialah deskriptif dengan pendekatan kualitatif. Subjek penelitannya yaitu empat siswa SMP Negeri 1 Jagoi Babang Kelas IXA dengan nilai yang sangat rendah. Pemilihan subjek penelitian dari kategori sangat rendah dilakukan berdasarkan nilai tes siswa yang paling rendah serta hasil jawaban siswa yang memiliki banyak kesalahan. Tes tertulis dengan bentuk uraian dan pedoman wawancara semi terstruktur merupakan alat pengumpul data. Dalam temuan analisis data, didapat kesulitan dan penyebabnya yang dialami oleh siswa. Adapun kesulitan yang dialami oleh siswa yaitu kesulitan dalam mengingat konsep, kesulitan dalam memahami tujuan dari pertanyaan hingga soal dianggap susah untuk dikerjakan, kesulitan dalam menggunakan operasi perhitungan dalam menentukan akar persamaan kuadrat, kesulitan dalam menentukan mana yang merupakan dan bukan merupakan persamaan kuadrat satu variabel, kesulitan dalam mengingat rumus kuadratik, dan kesulitan dalam melakukan prosedur atau langkah-langkah perhitungan dalam menentukan akar persamaan kuadrat. Faktor penyebab siswa mengalami kesulitan diantaranya adalah kurangnya pemahaman siswa dalam menguasai konsep persamaan kuadrat, kurangnya pemahaman siswa dalam menguasai konsep operasi perhitungan dalam menentukan akar persamaan kuadrat, kurang memahami prosedur atau langkah-langkah penyelesaian dalam menentukan akar persamaan kuadrat, dan kurang fokus dalam mengerjakan soal sehingga siswa merasa terburu-buru.