bluuebunny/crossref_metadata_2025 huggingface dataset:
Relationship between borderline personality traits, emotion regulation, and non-suicidal self-injury in depressed adolescents: a cross-sectional study
Authors: Chen Yang , Fu Wenxian , Ji Sifan , Zhang Wei , Sun Lingmin , Yang Tingting , He Kongliang , Zhou Yongjie
Published: January 2023

Objective: Non-suicidal self-injury (NSSI) is common among adolescents and has been linked to mental disorders and suicide in addition to physical injuries. According to the empirical avoidance model, adolescents with NSSI have stronger emotional experience and poorer emotional regulation than those without NSSI, which are core features of borderline personality disorder (BPD). The relationship between borderline personality features, emotion regulation, and NSSI in the population is unclear. This study aims to explore these associations and provide theoretical basis for the treatment of NSSI in the future.
Methods: Depressed adolescents (n = 1192) were evaluated using Chinese versions of the Function Assessment of Self-mutilation Scale, Emotional Regulation Questionnaire for Children and Adolescents, and Borderline Personality Features Scale for Children.
Results: The majority of depressed adolescents (71.3%, 850/1192) had demonstrated NSSI in the past year, with cutting or scratching the most common form (57.4%). Pearson correlation analysis with NSSI as a fixed factor (NSSI=1, no NSSI=2) revealed a negative correlation between NSSI and borderline personality characteristics (r = -0.314, P < 0.01) but a positive correlation between NSSI and emotion regulation capacity (r = 0.159, P < 0.01). This results are statistically significant. Emotion regulation played a mediating role between borderline personality traits and NSSI in adolescents with depression (effect value = 0.151).
Conclusion: Borderline personality features and emotional regulation ability were significantly correlated with non-suicidal NSSI in depressed adolescents. Borderline personality symptoms not only directly influence NSSI risk in adolescents with depression, but also indirectly influence NSSI risk through emotional regulation.
GPX4 overexpressed non-small cell lung cancer cells are sensitive to RSL3-induced ferroptosis
Authors: Lee Ji-Yun , Kim Joo-Won , Min Dong Wha , Kim Dasom , Kim Joohee , Kim Min Jung , Lim Hyangsoon
Published: January 2023

Ferroptosis is a type of programmed cell death, that can be induced by inhibiting antioxidant enzymes glutathione peroxidase 4 (GPX4) or cystine/glutamate transporter (system Xc−), increased intracellular concentrations of iron, and lipid peroxidation. Recently, it has been suggested that ferroptosis can be an effective way to induce cell death in various cancers, although the specific relevance and mechanism of ferroptosis have not been fully elucidated. In this study, the anticancer effects of ferroptosis inducers, erastin, and RSL3 on non-small cell lung cancer (NSCLC) cells were investigated. RSL3-induced cell death much more effectively in NSCLC cells than erastin with very limited cytotoxicity in BEAS-2B, normal bronchial epithelial cell. The sensitivity of NSCLC cells to RSL3-induced cell death was different among NSCLC cells, which was dependent on GPX4 expression levels, and rescued by ferrostatin-1, a ferroptosis inhibitor, but not by Z-VAD-FMK, chloroquine, bafilomycin A1, and necrostatain-1. RSL3 induced ferroptosis by increased lipid peroxidation, intracellular LIP concentration, and ROS, and inhibition of GSH to GSSH conversion through the inhibition of GPX4, and induction of Nrf2/HO1. Furthermore, RSL3 induced autophagosome, but disrupted formation of autolysosome from autophagosome. Knockdown of GPX4 had a similar effect on ferroptosis phenotypes to that of RSL3. Zebrafish xenograft model in vivo confirmed in vitro result of RSL3. Taken together, this study provides evidence that RSL3-induced ferroptosis depends on the regulation of GPX4- Nrf2/HO1 in NSCLC cells. This process may aid in predicting the ferroptosis response in NSCLC as well as drug resistant cancer cells.
Impact of statin treatment on cardiovascular risk in patients with type 1 diabetes: a population-based cohort study
Authors: Yoo Joonsang , Jeon Jimin , Baek Minyoul , Song Sun Ok , Kim Jinkwon
Published: January 2023

Background
Cardiovascular disease (CVD) is a major complication in type 1 diabetes mellitus (T1D) patients. Previous studies have suggested that statins may be helpful for prevention of CVD in T1D, but there are limited data on the role of statins in T1D. We investigated the relationship between statin treatment and cardiovascular risk in T1D patients using a population-based cohort.
Methods
We conducted a retrospective cohort study using the Korean nationwide health insurance database from January 2007 to December 2017. This study included 11,009 T1D patients aged ≥ 20 years without a prior history of CVD. The primary outcome was a composite development of stroke or myocardial infarction. Statin use during follow-up was treated as a time-varying variable. We performed a multivariable time-dependent Cox regression analysis adjusting for sex, age, type of insurance, hypertension, renal disease, and use of antiplatelets.
Results
During the 9.9 ± 3.7 years of follow-up, 931 T1D patients (7.1%) suffered primary outcome. Statin treatment was associated with a reduced risk of the primary outcome (adjusted hazard ratio, 0.75; 95% confidence interval, 0.65–0.87). Statin use led to decreased risks of ischemic stroke and myocardial infarction, but was not related to hemorrhagic stroke. We also found that the risk of cardiovascular events decreased as the cumulative exposure duration of statins increased.
Conclusions
Statin use was associated with a lower risk of cardiovascular events in TD1 patients. Further prospective studies are needed to confirm the potential role of statins in prevention of CVD in patients with T1D.
Light exposure behaviors predict mood, memory and sleep quality
Authors: Siraji Mushfiqul Anwar , Kalavally Vineetha , Haque Shamsul
Published: January 2023

Ample research has shown that light influences our emotions, cognition, and sleep quality. However, little research has investigated if different light exposure-related behaviors, such as the use of electric light during daytime, and use of gadgets before sleeping, influence those variables. Three-hundred-and-one Malaysian adults (MeanAge±SD=28 ± 9) completed the Light Exposure Behavior Assessment (LEBA) tool that measured five light exposure behaviors. They also completed the Morningness-Eveningness Questionnaire, Positive and Negative Affect Schedule, Pittsburgh Sleep Quality Index, and single items assessing trouble in memory and concentration. A partial least square structural equation model, showing 61.36% predictive power, revealed that increased use of wearable blue filters indoors and outdoors decreased the morningness affect (Direct effect, DE=-0.16) and sleep quality (Total effect, TE = 0.11). Increased time spent outdoors predicted positive affect (DE = 0.32) and early chronotype (DE: RI = 0.14, PT = 0.15, RT = 0.15). Increased use of gadgets before sleep predicted late chronotype (DE: RT=-0.26; RI=-0.23; PT=-0.24; MA=-0.13), increased negative affect, reduced sleep quality (DE = 0.13), and increased trouble in memory and concentration (TE = 0.20 & 0.23, respectively). Increased use of electric light in the morning and daytime predicted a positive affect (DE = 0.16) and sleep quality (DE=-0.16). The results provide valuable insights into developing a healthy light diet to promote health and wellness.
NKD1 targeting PCM1 regulates the therapeutic sensitivity of HHT on colorectal cancer cells
Authors: Cao Jia , Ma Rong , Wang Jia , Shi Bin , Zhao Jufen , Tian Jinhai , Huang Qi , Yu Jingjing , Tao Xiang , Wang Libin
Published: January 2023

Colorectal cancer (CRC) is the most common primary malignant tumor with a significantly higher incidence in the worldwide. Homoharringtonine (HHT) often used to treatment of acute leukemia. Recent research revealed it could be used for solid cancer therapy. However, the regulatory target and mechanism of HHT in CRC progression remain elusive. This study proved that HHT suppressed cell proliferation and promoted cell cycle arrest and apoptosis. Transcriptome sequence indicated that NKD1 was the target of HHT in CRC. HHT could suppress NKD1 expression in a concentration and time dependent manner. NKD1 was overexpressed in CRC tissues and depletion of NKD1 enhanced the therapeutic effect of HHT on CRC in vitro and vivo. Furthermore, proteomic analysis revealed that PCM1 involved in the process of cell proliferation and cell cycle regulated by NKD1. NKD1 interacts with PCM1, and NKD1 promotes the ubiquitination degradation of PCM1. Moreover, overexpression of PCM1 can effectively reverse the promoting effect of NKD1 interference on cell cycle arrest and apoptosis. These results suggested that the NKD1/PCM1 axis participated in mediating the therapeutic sensitivity of HHT to CRC. Our findings provide evidence for clinical application of NKD1-targeted therapy in improving HHT sensitivity for CRC treatment.
An experimental dynamic NMR study of 2-(aryl)-4,5-diphenyl-1H-imidazoles in solution: the evaluation of NH behavior in terms of proton transfer and tautomerism and its application on detecting of special protons and carbons of trisubstituted imidazoles
Authors: Yaghmaeiyan Nahid , Mirzaei Mahdi , Bamoniri Adolhamid
Published: January 2023

The proof of the tautomerism phenomenon and the exchange of protons bounded to nitrogen and oxygen is possible by evaluating the rate of proton exchange and factors that effect on it. For 2-(aryl)-4,5-diphenyl-1H-imidazoles, scrutiny of proton transfers and tautomerism is possible by evaluation of their proton and carbon spectra. This paper reports results of the studies on 1H and 13C NMR spectra of 2-(aryl)-4,5-diphenyl-1H-imidazoles in solution. We have investigated the dynamic NMR of these compounds based on concentration and introduce a way instead of TOCSY technique for detecting the overlapped signals of protons and carbons of aryl substituent which located in position 2 of imidazole ring.
Hybrid Kyphoplasty with Short-Segment versus Intermediate- and Long-Segment Pedicle Fixation for the Management of Thoracolumbar Burst Fractures
Authors: Chou Kuan-Nien , Wang Peng-Wei , Chung Ming-Hsuan , Ju Da-Tong
Published: January 2023

Background
Surgical treatment is usually recommended for thoracolumbar burst fractures (TLBFs) to mitigate the spinal deformity and/or neurological deficits. This study aimed to compare the clinical and radiographic outcomes of hybrid short-segment (HSS, four screws) technique with the traditional intermediate-segment (IS, six screws) and long-segment (LS, eight screws) pedicle screw fixations for treating acute TLBFs.
Methods
The patients in this study had acute single-level TLBFs with neurological deficits between levels T11 and L2, treated surgically between July 2013 and December 2019. We compared the surgical complications, blood loss, and operative duration of patients treated with the three pedicle screw techniques. We also compared postoperative thoracolumbar kyphotic degeneration between groups using the data on Cobb angles between the superior endplate of the vertebra above and inferior endplate of the vertebra below the fractured vertebra on lateral radiographic images at three time points (preoperatively, postoperative day 1, and postoperative follow-up). Forty-three patients were included: 15 treated with HSS, 12 with IS, and 16 with LS pedicle screw fixations. The end of follow-up (mean, 11.2 months) was defined as the most recent postoperative radiographic image or implant complication occurrence.
Results
We found significantly lower blood loss and shorter surgical durations in the HSS group than in the IS and LS groups. The HSS group exhibited the lowest rate of implant complications (13.33%), with the highest rate in the IS group (58.33%). Implant complications, including pedicle screw and rod dislodgement as well as pedicle screw damage and loosening, occurred at a mean follow-up of 7.5 (range: 6–9) months in the HSS group, 9 (range: 5–23) months in the IS group, and 7 (range: 1–21) months in the LS group. HSS patients demonstrated the most effective immediate kyphosis correction postoperatively. However, one patient underwent reoperation due to symptomatic cement leakage.
Conclusions
In the surgical treatment of single-level TLBFs, the HSS technique required a shorter operative duration and led to lower complication rates and operative blood loss than IS and LS approaches. This technique facilitates immediate kyphosis correction and successful maintenance of the corrected alignment 1 year later.
From the simulation of forest plantation dynamics to the quantification of bark-stripping damage by ungulates
Authors: Ligot Gauthier , Gheysen Thibaut , Perin Jérôme , Candaele Romain , de Coligny François , Licoppe Alain , Lejeune Philippe
Published: January 2023

Large ungulate populations are known to cause economic damage to agriculture and forestry. Bark damage is particularly detrimental to the timber production of certain species, including Picea abies (L.) Karst (Norway spruce): after bark is wounded, rot often spreads in the trunk base, damaging the most valuable log section. Numerous studies have provided valuable information on various aspects of this process, for example identifying factors governing tree sensitivity to bark-stripping or estimating the rate of decay spread in the trunk. The financial consequences over a full timber production cycle have nevertheless remained poorly quantified and uncertain. Coupling a forest dynamics model (GYMNOS) with models of damage occurrence and decay spread, we simulated the effect of ranging levels of bark-stripping damage on financial losses. The simulations were repeated for sites of ranging fertility and with different protection measures (fences or individual protections). The net present values of these different simulations were estimated and compared to estimate the cost of the damage and the cost-effectiveness of the damage protections. Protecting plantations against bark-stripping damage with fences was found unlikely to be worthwhile. By contrast, individual protections placed on crop trees could be helpful, particularly in the most fertile stands. Loss of revenue depended greatly on the factors tested: we estimated that the average damage cost could be about 53 €/ha/year, reducing timber yield by 19% in the study area, in Southern Belgium.
Why didn’t the caribou (Rangifer tarandus groenlandicus) cross the road? The barrier effect of traffic on industrial winter roads
Authors: Smith Angus , Johnson Chris J.
Published: January 2023

Barren-ground caribou are in steep decline due to the combined effects of climate change, natural population fluctuations, and anthropogenic disturbance. For the Indigenous peoples that rely on caribou for subsistence and cultural continuity, this decline presents a grave threat to a way of life. Wildlife managers are concerned about the potential effects of winter roads on the use of space by caribou. Roads, especially those with high levels of traffic, act as barriers to movement by ungulates. In the central Northwest Territories, Canada, the Tibbitt to Contwoyto Winter Road services diamond mines located on the winter range of several populations of barren-ground caribou. Impeded movement could restrict the distribution or influence the habitats used by caribou during winter. We investigated the influence of traffic volume and other disturbance and environmental variables on the road-crossing decisions of caribou. We used logistic regression to contrast observed and available crossing events by caribou that were recorded using high-precision GPS collars during 2018–2020. Of 62 collared caribou that moved near the winter road, only 33 crossed the winter road, for a total of 100 crossing events. Caribou rarely crossed the road when any level of traffic was present; the level of traffic, not the road right-of-way, was the underlying explanatory factor for that behavioural decision. Our results suggest that mitigation and associated monitoring should focus on strategies that minimize traffic volume or provide breaks in traffic when caribou are adjacent to winter roads.
A trial deep learning-based model for four-class histologic classification of colonic tumor from narrow band imaging
Authors: Shimizu Takeshi , Sasaki Yoshihiro , Ito Kei , Matsuzaka Masashi , Sakuraba Hirotake , Fukuda Shinsaku
Published: January 2023

Narrow band imaging (NBI) has been extensively utilized as a diagnostic tool for colorectal neoplastic lesions. This study aimed to develop a trial deep learning (DL) based four-class classification model for low-grade dysplasia (LGD); high-grade dysplasia or mucosal carcinoma (HGD); superficially invasive submucosal carcinoma (SMs) and deeply invasive submucosal carcinomas (SMd) and evaluate its potential as a diagnostic tool. We collected a total of 1390 NBI images as the dataset, including 53 LGD, 120 HGD, 20 SMs and 17 SMd. A total of 59,8801 patches were trimmed from the lesion and background. A patch-based classification model was built by employing a residual convolutional neural network (CNN) and validated by three-fold cross-validation. The patch-based validation accuracy was 0.876, 0.957, 0.907 and 0.929 in LGD, HGD, SMs and SMd, respectively. The image-level classification algorithm was derived from the patch-based mapping across the entire image domain, attaining accuracies of 0.983, 0.990, 0.964, and 0.992 in LGD, HGD, SMs, and SMd, respectively. Our CNN-based model demonstrated high performance for categorizing the histological grade of dysplasia as well as the depth of invasion in routine colonoscopy, suggesting a potential diagnostic tool with minimal human inputs.
Groundwater Quality Assessment using SPSS based on multivariate statics and water quality index of Gaya, Bihar.
Authors: ALAM AFTAB , SINGH ANSHUMAN
Published: January 2023

Groundwater is a valuable resource for developmental activities, and its demand is growing as surface water becoming scarce. Groundwater demand is increasing, resulting in reduction in water level and deterioration in water quality. 156 groundwater samples were taken in the district of Gaya, Bihar, to check the safety of drinking water. The quality of the obtained sample was assessed using a variety of physicochemical characteristics. For evaluating water quality, statistical methods were used as they are effective and efficient. This study uses SPSS software to perform multivariate statistical analysis on the groundwater samples. The quality of groundwater was assessed using a water quality index (WQI). 17% of the sample were found to be of very poor quality and not consumable. The KMO's sample adequacy value of 0.703 and the significance level of Bartlett's test of sphericity (0.0001) were calculated indicating that PCA may be implemented appropriately on the data to extract relevant information. Using the PCA, the three components recovered explained 69.581 percent of the total variation. A multivariate statistical method called cluster analysis is also used to draw conclusions from complicated data. The major parameters affecting the water quality in the study region are TDS, Ca2+, Mg2+, HCO3-, Cl-, F-, and PO42-. These results may be used for water quality assessment leading to improved environmental management and planning, and in decision-making for water quality management.
Understanding the Pathways between Exposure to Heavy Metals and Oncogenesis from a Public Health Perspective, a Rapid Review of Literature.
Authors: Varela-Jaramillo Santiago ,   Alex Taub-Krivoy1, Suarez-Gómez Santiago A. , Serrano Eduardo , Villamil-Patiño Gabriela , Torres Juan F. , Palencia-Sánchez Francisco
Published: January 2023

Cancer is one of the leading causes of death worldwide with progressively increasing incidence related to multiple pathophysiological mechanisms. According to WHO, in 2020 around 18.1 million new cases were reported being breast cancer, the most common with 2.26 million cases followed by lung with 2.20 million and colorectum with 1.93 million. The relationship between cancer and exogenous metal exposure is not new, nevertheless, it was not until recent years that clear pathways were described. Although many metallic elements are required for different physiological and biochemical pathways, at elevated concentrations they have different reported pathological mechanisms. When ingested, heavy metals get oxidized with gastric acid, some become lipophilic, and others induce Reactive Oxygen Species and disrupt processes involving DNA replication, protein synthesis, and folding. The most common heavy metal groups reported include Cadmium (Cd), Lead (Pb), Nickel (Ni), Chromium (Cr), Mercury (Hg), Arsenic (As), and Zinc (Zn), among others. The main objective of this study is to review, the different mechanisms proposed for oncogenesis related to exposure to heavy metal carcinogenesis including, a broad approach to the epidemiology of cancer and its relationship with heavy metals and synthesizing the evidence related to the carcinogenesis of heavy metals and describe the pathophysiological pathway involved in oncogenesis.
Benchmarking GNNs for Blood-Brain Barrier Permeability Prediction
Authors: Dinesh Jidin , Pathinarupothi Rahul Krishnan , Soman K.P.
Published: January 2023

With the burden of deaths and disability caused by neurological disorders like Alzheimer's disease, Parkinson’s disease, and epilepsy on the rise, speeding up the novel neurotherapeutic drug discovery process becomes crucial. Determining whether a drug is blood-brain barrier permeable or not is a prerequisite for discovering all central nervous system (CNS) drugs. Accurate and high throughput screening of clinical CNS drugs candidates based on their blood–brain barrier (BBB) permeability therefore becomes important, given the high failure rate of drug candidates due to their inability to penetrate the BBB. Molecules being richly annotated molecular graphs with atom, bond, and substructure features make graph representation learning for blood–brain barrier permeability worth studying. In this work, we holistically benchmark the performance and generalizability of 4 graph neural network models - Message Passing Neural Network (MPNN), Graph Convolutional Network (GCN), Graph Attention Network (GAT), and Graph Isomorphism Network (GIN) to quantitatively and qualitatively predict the BBB permeability of molecules.
Detection of Cracks in Solar Panel Images Using Complex Wavelet Transform and ANFIS Classification Method
Authors: M Perarasi , Ramadas Geetha
Published: January 2023

The authors have requested that this preprint be removed from Research Square.
3S-IoT: An Algorithmic Approach to Smart and Secure IoT Network
Authors: Pant Maneesh , Kumar Sachin , Sharma Rahul Kumar , Alkhayyat Ahmed
Published: January 2023

The growing and the widespread existence of the Internet of Things (IoT) has made our lives easier and more convenient. However, it still needs to dominate challenges, such as efficiency, security, and high energy consumption, to enrich innovative IoT-based applications. Unicast communication is used for small-scale applications. Multicast is preferable in large-scale communication because it allows efficient transmission with fewer resources and is utilized in various IoT applications. Multicast traffic involves actuator control to handle critical applications. Securing multicast traffic is complex as it needs an efficient and flexible Group Key Establishment (GKE) protocol. Therefore, this paper presents a temper proof of a three-level security model that can maintain the efficiency and security of IoT and multicast communications. The first authentication is done at network linking, where a 256-bit keyless encryption technique has been employed. Machine learning-based chaotic map key generation authenticates the GKE as the second-level authentication. Finally, Message Digest Algorithm 5 (MD5) establishes the system key. 3S-IoT is smart to detect any tempering with the devices. It stores the signature footprints of the connected devices. The algorithm is equipped to report any attempt to change or temper a device. 3S-IoT can thwart attacks such as Distributed Denial of Service (DDoS), Man-in-the-Middle (MiTM), and phishing. The numerical analysis is done by evaluating energy consumed, bandwidth, and the time taken to check the robustness of the proposed model. The results show that 3S-IoT can efficiently deal with the attacks. The work's authenticity is validated by comparing the proposed work with existing benchmark algorithms.
Beiträge zur Fortschreibung der Florenliste Deutschlands (Pteridophyta, Spermatophyta) – Zwölfte Folge
Authors: Hand Ralf
Published: January 2023

In dem Beitrag sind Nach­träge und Korrekturen zur 2018 veröffentlichten "Liste der Gefäßpflanzen Deutschlands" zu­sammengestellt und kommentiert. Insgesamt drei Taxa müssen aus der Liste der etablierten Sippe gestrichen werden, weil sie entweder in Deutschland nicht eingebürgert sind oder es sich um Fehlzuordnungen handelte. Die Neu­zugänge (sechs Taxa) beschränken sich auf mehrere kritische Gattungen, darunter Rubus und Taraxacum. In mehreren Fällen werden Na­mens- und Rangstufenänderungen erforderlich.
Developing a prototype centre using agricultural smart sensors to promote agrarian production with technology
Authors: Nramat Wichai , Traiphat Wasakorn , Sukruan Phuachat , Utaprom Prachum , Tongsawai Saranyaras , Namgaew Suriya , Sodajaroen Suvinai
Published: January 2023

This article presents the development of a model center using agricultural intelligent center technology. The goal of this research is 1. To develop a wireless sensor network. 2. To be a source of learning on the use of sensor technology in agriculture. For local and nearby farmers Using the Sufficiency Economy Learning Center, according to King's Science. The Rajamangala University of Technology Suvarnabhumi is a research area. With the problems faced in farming today. It found that the world's climate change whether it's drought. Rains leave ranges and toxic airborne particulate matter caused by farming to match current problem conditions. The researchers then designed a two-part system: 1. Node Moisture Sensor that measures soil moisture and commands the opening – It also controls on-off with a manual switch. Wind speed and wind direction sensors, light intensity sensors, temperature, and humidity sensors, and Particulate Matters Sensor 1.0, 2.5, 10 with environmental reports within the growing area via Wi-F signals to (Sever) Raspberry Pi record real-time data. Every 30 seconds According to research, node moisture sensors can measure soil moisture and record results, and the station measures the environment within the growing area via a Wi-F signal to (Sever) Raspberry Pi. Rainfall values measured by local rainfall sensors measuring up to 35.3 mm are within the threshold of heavy rain. The maximum wind speed measured is 8.5 km/h, the maximum temperature of 35.8 degrees Celsius, and the maximum humidity of 99.9 percent, the light intensity is up to 58,002 Lux, and the Final Particles, with pm 1.0 up to 40.1 microns, PM 2.5 up to 51.3 microns and PM 10 up to 63.5 microns. Apply agriculture to 50 interested farmers after receiving knowledge transfer of smart sensor technology. The expansion has resulted in 3 farmers and will continue to expand in the future. Promote the use of agricultural technology. Intensifying communities and supporting global climate change
Experimental determination of dynamic characteristics of a railway track
Authors: Zhangabylova Aigul , Bikhozhayeva Gulmira , Kvashnin Mikhail , Kurbenova Assel , Joldassova Kuralay
Published: January 2023

It is known a priori that vibrations that occur in the elements of the track structure during the passage of a train load are a superposition of free and forced mechanical vibrations. It has been established that the range of oscillation frequencies of the elements of the track superstructure includes oscillations with a frequency from tens to hundreds and thousands of hertz. However, the influence of vibrations on the track and their dependence, in turn, on the design of the track, has not been fully studied, which causes controversy between specialists in this matter. There is an opinion that in intermediate fastenings, the main role is played by an elastic gasket, which ensures the vertical rigidity of the rail-sleeper assembly. It has been experimentally established that in the frequency range below the frequency of free oscillations of rail fastenings, the force applied to the upper surface of the elastic gasket is transferred to the lower surface in an unchanged form.

The article discusses the vibrations that occur in the elements of the upper structure of the track (rails, sleepers, rail fastenings, ballast base) during the passage of a moving load, which significantly affect the strength, and, consequently, the durability of both the elements themselves and the railway track generally. Vibrograms, oscillograms, accelerograms of rail oscillations and their spectra during the passage of TALGO are presented. At present, the VOSSLOH fastening, developed in Germany, has been widely used in the construction of tracks on high-speed railways of the Republic of Kazakhstan. In this regard, there is a need for a comprehensive study of the operation of this type of fastening under a train load
Evaluating tectonic dislocations formation under the action of stresses at the Upper Kama potassium salt deposits
Authors:   Vladimir State University, Vladimir Filatov
Published: January 2023

Introduction. The studies of the tectonic structure, dynamic behavior and prediction of the areas of the most probable manifestation of hazardous dynamic events at the Upper Kama potassium salt deposits (VKMKS) revealed that active faults, nodal structures, fracture zones and individual fractures in the oversalt, salt and subsalt rocks exercise a decisive influence on the violation of the steady state of geological structure. The regional stress field and a large number of local factors caused by folding, basement tectonics (catagenetic and supergene leaching), exogenous (weathering and unloading) and endogenous (halokinesis) processes in the oversalt strata, the growth of dome structures, etc. cause tectonic dislocations in the VKMKS. Cracks and fissure zones have currently been incidentally mapped and quantitatively studied mainly in mine workings in the productive part of the deposit, to a lesser extent in the oversalt rock, and scarcely in subsalt deposits. A detailed high-precision gravity prospecting along with other geophysical methods is currently the only effective method for tectonic dislocations mapping in the rock mass of the VKMKS. Methods for the widespread and systematic mapping of tectonic dislocations both in plan and in section within the VKMKS have not been developed yet. However, the evaluation of kinematic tectonic dislocations development in bulk can be obtained to some extent by analyzing the qualitative and quantitative characteristics of the natural stress field. It is due to the fact that dislocations are formed only when the acting stress exceeds the limit of the corresponding longterm strength of rocks forming the object under study. Methods of research. Tectonic dislocations of various kinematic types are formed under the action of stresses. Kinematic dislocations depend on the relationships between the stress principal values. Therefore, to solve the problem of kinematic type in the Solikamsk depression (SD) and VKMKS, the data of natural stress field components measurement in Ural mine workings were analyzed, the regularities of its behavior in plan and depth were determined, which served as the basis for two mathematical models, regional and local. Research results. Mathematical modeling was carried out, giving a quantification of stress components behavior regularities with the depth for the tectonic and physical-geological conditions of SD and VKMKS. Conclusions. The data on the change in stress components, obtained from mathematical modeling for two models of the geological environment, made it possible to predict the regularities in formation of tectonic dislocations of various kinematic types at different depths in SD and VKMKS at the regional and detailed scale levels.
Calculating arched supports with blocking
Authors:   Ural State Mining University, Maksim Volkov , Valentin Potapov ,   Ural State Mining University, Vladimir Potapov ,   Ural State Mining University
Published: January 2023

Relevance. Improving the stability of driftways and inclined mine workings is an essential task in underground mining. Support efficiency largely depends on the conditions of its contact with the host rocks. When building steel arch supports, much attention is therefore paid to set blocking and contact grouting. Evidence shows that the blocking is important for support stability. Whenever due attention is not paid to this problem, load from shifting rocks transfers to the middle part of capping and causes bending before the support ever reaches the yielding mode. Research objective is to increase the stability of driftways and inclined mine workings by controlling the stress-strain state of frame supports. Research object is steel arch support of driftways and inclined mine workings. Research subject is the calculation and design of steel arch support with control forces. Research task is to develop the methods for calculating frame support using the most rational types of control forces. Methods of research include an integrated research method with scientific generalization of theoretical and experimental works by domestic and foreign researchers, theoretical studies based on the methods of structural mechanics, field observations and experiments, results processing based on the methods of mathematical statistics. Results. It was established by calculations that under symmetrical load, the use of blockings with a given force value of 20 kN increases the bearing capacity of the support by 1.5 times, and under asymmetric load – by 2.3 times. The given calculation data make it possible to determine the rational parameters of support with blocking to ensure stable support for mine workings.
Assessing technical capacities and economic efficiency of granulated middling hydraulic transportation as applied to Kursk Magnetic Anomaly deposits development
Authors:   National University of Science and Technology MISiS (branch), Evgenii Terekhin , Anton Kazantsev ,   National University of Science and Technology MISiS (branch)
Published: January 2023

Introduction. The majority of iron ore open pits in Russia and the CIS belong to the category of deep open pits, same as prospective Kursk Magnetic Anomaly (KMA) deposits (Prioskolskoye, Chernyanskoye, Pogrometskoye, etc.) with the thickness of overburden equal to 100–150 m where the open pits will be deep already at the early stage of mining operations. Research objective is to provide rationale for hydraulic transportation advantage over other types of industrial transport and identify technical capacities and economic efficiency for a new scheme of opencasting and transport of promising fields of KMA at the stage of the pre-project development. Research objects are Prioskolskoye and Chernyanskoye deposits. The main methods of research were the graphic method, graphic-analytical method and method of technical and economical comparison of different options. The basis of the proposal for development of the prospective KMA deposits is a new layout of the industrial site of a miningand-processing facility with location of parts of the crushing and grinding complex in the open pit and hoisting of ore in the form of pulp to the surface by pipeline transport for further beneficiation. Results. In general, the prefeasibility study involving the technical and economical comparison of two prospective KMA deposits shows cost savings with regard to ore transportation from the open pit to the industrial site by hydraulic transport compared to the cyclic-flow technology. The new technology enables reduction of the transportation costs by 1,5–2 times and increase in labour productivity with regard to ore transportation by 2–3 times.
Astrophysical and other components of rock mass stress
Authors:   Institute of Mining UB RAS, Albert Zubkov , Sergei Sentiabov ,   Institute of Mining UB RAS
Published: January 2023

Research objective is to study the patterns of stress formation in various fields, identify the trend in stress changes over time and reduce the severity of technological disaster consequences in the field of subsoil use. Prediction of rock pressure manifestation place and time is currently one of the most urgent tasks. Methods of research include in-situ experimental measurements of the stress state of the deposit’s rock mass and ore at accessible depths and horizons, the establishment of patterns of stress growth with depth, as well as long-term geodeformation monitoring of virgin ground stress level since 1990. Research methodology is geodeformation monitoring in mine conditions and statistical processing of the results. Results analysis made it possible to establish the patterns of changes in the stress-strained state of both natural and man-made rock masses in the course of mining. An analysis of mining experience has shown that tectonic disturbances commonly act as stress concentrators, introducing significant heterogeneity in the stress field of a rock mass section and often resulting in emergency situations. Conclusions. The paper presents the generalized results of long-term geodeformation monitoring of natural stresses in Ural mines, carried out by the Laboratory of Geodynamics and Rock Pressure, IM UB RAS, over the past 20 years. The results have suggested a new, more advanced structure of the field of natural stresses with reference to their change in time. It was revealed that the relative deformation of the Earth and the Earth's crust in particular cycles does not exceed 1.43 · 10–4 (leading to changing rock mass stress state by 5–15 MPa), which is presumably the same for all continents and causes emergencies everywhere
Analyzing methods for calculating the output of the KSM-type surface miners at the Elga coal deposit
Authors:   N. V. Chersky Institute of Mining of the North of the Siberian Branch of the RAS, Dorzho Khosoev
Published: January 2023

Introduction. The outlook is considered for blastless rock and coal mining at the Elga coal deposit when using continuous mining based on rotary conveyor lines and KSM-type cutting and loading machines. The article describes the mining and geological conditions of the Elga coal deposit. The article considers a range of sizes of the Sutterwhite-class rotary mining machines that contains seven models from the KSM (KRUPP Surface Miner) production series for open-pit mining with an output from 700 to 3000 m3 /h in a solid block or 1250–4000 m3 /h in soft ground. The article analyzes various methods for KSM-type surface miner output calculation for the conditions of the Elga coal deposit in the Republic of Sakha (Yakutia). Results and analysis. It has been established that the overburden at the deposit is strongly coherent, the machine’s output in terms of energy-power indicators ranges from 420 m3 for conglomerate and up to 850 m3 for siltstone, which is less than the rated technical output of KSM-2000R for solid rock equal to 1400 m3 /h. The results of the KSM-type surface miners output calculation by the kinematic factor show that at a rated layer height of 2.9 m, the output of the KSM-2000R was 1138 m3 /h, and the output of the KSM-2000RM was 1804 m3 /h. This correlation is maintained for different layer heights. KSM-2000RM has 80 buckets, while KSM-2000R has only 60 buckets, which explains different output. Additionally, the KSM2000RM depth of cut is 60 mm, which is greater compared to 47 mm of the KSM-2000R depth of cut. The Dombrovsky method for output calculation using the cross-section area of the cut and the bucket feed showed that the result obtained for the hourly output (1410 m3 /h) coincides with the hourly output of 1400 m3 /h specified in the technical passport for KSM-2000R. Conclusions. The results analysis showed that the highest output indicator of 1410 m3 /h for the KSM-2000R was obtained through the Dombrovsky method, and the output indicator of 1804 m3 /h for the KSM-2000RM was obtained through the calculation by the kinematic factor.
Calculating the time within which the emulsion explosive sensitized by gas microbubbles preserves the susceptibility to the initiating pulse
Authors:   Research Institute of Comprehensive Exploitation of Mineral Resources (IPKON), Sergei Gorinov , Aleksei Koretskii ,   N. M. Fedorovsky Polar State University, Ilia Iu Maslov ,   OOO Global Mining Exclusive-Russia
Published: January 2023

Introduction. The paper considers the behaviour of the sensitizer, gas microbubbles (GMB). The matters of emulsion explosives (EE) reliable detonation in the course of blasting are addressed. Research objective. To improve the reliability of blasting operations that apply EE, the research aims to develop the procedure calculating the time within which a borehole descending charge of EE, sensitized by GMB preserves the ability to initiate. Methods of research are based on analytical research describing GMB deformation under the impact of hydrostatic pressure of the charge column as well as further motion of GMB in the pseudoplastic liquid. Results. It is known that with the sensitization of EE, GMB, with a decrease in total porosity below a certain critical value, EE lose the ability to initiate. In descending blast wells, under the influence of excessive hydrostatic pressure of the charge column, the size of the GMB decreases and the overall porosity of the EE decreases due to the compression of these microbubbles, which negatively affects the detonation capabilities of the EE. In this case, as shown in the article, after the formation of the borehole charge, an additional, slowly progressive decrease in the porosity of the EE occurs due to the ascent of the GMB. This contributes, after a certain period of time, to the loss of the ability to detonation decomposition by the downhole charge of the EE, which must be taken into account when the charge is in an explosive well for a long time. An analytical solution has been obtained that makes it possible to estimate the time of preservation by a borehole descending charge of EE, sensitized by GMB, the ability to initiate. The solution takes into account the heterogeneity of the GMB in size and the power of the intermediate detonator used to initiate the EE charge. Conclusions. The regularities obtained in the article make it possible to increase the reliability of blasting operations using EE, sensitized GMB.
Pillar dimensions optimization in room-and-pillar mining in underground mines
Authors:   North Caucasus State Technological University, Oleg Gabaraev
Published: January 2023

Research objective is to optimize pillar dimensions in room-and-pillar mining in underground mines. Methods of research include analyzing theory and practice in this field and carrying out engineering forecast for the prospects of room-and-pillar mining. Results. The article explains the urgency of pillar dimensions optimization aimed at ensuring personnel, equipment and subsoil safety. The article shows the role of mining-geological and technological factors that weaken the rock mass and introduces the resulting coefficient of pillar design diameter increase for a pillar within the stress-strained rock mass system. Formulas are presented calculating safe pillar increase parameters to compensate for its weakening caused by the manifestation of natural and man-induced factors of various origins. The order of weakening coefficients quantitative values is determined based on specific mining conditions and established regularities, including those depending on probabilistic indices. Weakening coefficients have been characterized considering the data about the factors behaviour. The dependence between the pillar strength and the pillar base strength has been extended. The role of stresses crucial for the pillars is revealed, and an algorithm for their forecast based on probable mathematical models is recommended. Conclusions. Based on this study data, pillar dimensions in room-and-pillar mining in underground mines can be optimized. It is recommended to use the research results when designing an ore extraction technology and adjusting the development parameters
Improving mining development modelling based on the thermal methods
Authors:   PermNIPIneft, a branch of OOO LUKOIL-Engineering, Semen Podoinitsyn , Sergei Terentiev ,   PermNIPIneft, a branch of OOO LUKOIL-Engineering, Seiid Nazirov ,   PermNIPIneft, a branch of OOO LUKOIL-Engineering, Vladislav Uliashev ,   PermNIPIneft, a branch of OOO LUKOIL-Engineering
Published: January 2023

Introduction. The problem of oil recovery growth and oil reserves management improvement in active oil fields is growing annually. It is possible to increase oil recovery and improve oil reserves management by introducing the thermal methods of oil production. This method was applied at the Yarega oil field. The thermal mining development technology is currently being implemented at the Yarega territory on an industrial scale. Lyael territory is developed by SAGD technology. Heat capacity and thermal conductivity are crucial characteristics of rocks. Reference books and databases lack reliable data on sedimentary rocks thermal properties. The traditional experimental base of thermal petrophysics cannot provide representative information on the thermal properties of rocks, considering rock heterogeneity and anisotropy, various fluid saturation, and pressure and temperature fluctuations. Results. According to special petrophysical studies of the Yarega highly viscous oil field core, ambiguity has been revealed in the thermal properties of rocks, including anisotropy, heat capacity and thermal conductivity. When applying laboratory results in modeling, divergence in oil production and cumulative steam oil ratio can reach 60%. Main ambiguity arising in the course of thermal mine development modeling has been identified. The ambiguity is associated with the account of production for a well, a large number of underground wells, and low reservoir pressure (lower than atmospheric pressure). These problems are successfully solved by specialists of the Yarega field, who maintain highly viscous oil development. At low reservoir pressures, the simulator encounters errors on low pressure values during well operation. Conclusions. At the Yarega field, permanent geological and technological model is currently actively being implemented. It is aimed at solving technological problems of ambiguity in the development of highly viscous oil by thermal methods using advanced software.
Nonlocal field theory of quasiparticle scattering in dipolar Bose-Einstein condensates
Authors: Holanda Ribeiro Caio C. , Fischer Uwe R.
Published: January 2023

We consider the propagation of quasiparticle
excitations in a dipolar Bose-Einstein condensate, and derive a nonlocal
field theory of quasiparticle scattering at a stepwise inhomogeneity of
the sound speed, obtained by tuning the contact coupling part of the
interaction on one side of the barrier.
To solve this problem ab initio, i.e., without prior assumptions on the
form of the solutions, we reformulate the dipolar Bogoliubov-de Gennes
equation as a singular integral equation. The latter is of a novel
hypersingular type, in having a kernel which is hypersingular at only
two isolated points. Deriving its solution, we show that the integral
equation reveals
a continuum of evanescent channels at the sound barrier which is absent
for a purely contact-interaction condensate. We furthermore demonstrate
that by performing a discrete approximation for the kernel, one achieves
an excellent solution accuracy for already a moderate number of
discretization steps. Finally, we show that the non-monotonic nature of
the system dispersion, corresponding to the emergence of a roton minimum
in the excitation spectrum, results in peculiar features of the
transmission and reflection at the sound barrier
which are nonexistent for contact interactions.