bluuebunny/crossref_metadata_2025 huggingface dataset:
Stability of coupled memristive reaction-diffusion neural networks with time-varying delay
Authors: Li Chunquan , Xiong Zhijun
Published: July 2023

This article investigates the stability problem of time-delay coupled memristor reaction diffusion neural networks(DCMRNN). First, we give a delayed memris-tor reaction-diffusion neural network model. Then, a delay coupled memristor reaction diffusion neural network is obtained through linear coupling. Then, using Green’s formula and inequality techniques, an extended Lyapunov functional method is used to construct appropriate Lyapunov functional, and sufficient conditions are obtained to ensure the stability of DCMRNN; Finally, the effectiveness of the results was verified through two numerical examples.
Variation of photosynthesis along the canopy profile of sugarcane and energy canes
Authors: Cruz Larissa P. , Pacheco Vinícius S. , Nogueira Cíntia C. M. , Pissolato Maria D. , Almeida Rafael L. , Machado Eduardo C. , Ribeiro Rafael V.
Published: July 2023

Energy cane (Saccharum spp. hybrid) is a sustainable feedstock for the sucroenergetic sector due to its capacity of producing more biomass than sugarcane (Saccharum spp. hybrid). As biomass is formed by carbohydrates, photosynthesis is a key physiological process to understand the biomass production by plants. Herein, one sugarcane (IACSP95-5000) and two energy canes (Vertix 2 and Vertix 3) genotypes were cultivated under greenhouse conditions to evaluate the photosynthetic capacity of top leaves and to measure the actual photosynthesis of all green leaves of the main tiller. All genotypes showed similar maximum and actual photosynthesis in the top leaves, which was not correlated to their biomass production. In fact, the effects of leaf aging on canopy CO2 uptake, differential tillering and respiration rate seem to explain biomass production. IACSP95-5000 showed a sharp decrease in several photosynthetic traits and in abundance of key photosynthetic enzymes along the canopy profile, resulting in the lowest biomass yield. Vertix 2 and Vertix 3 exhibited a canopy with higher photochemical activity and lower variation in abundance of key photosynthetic enzymes with leaf aging as well as more well-developed tillers as compared with IACSP95-5000. Moreover, Vertix 2 – bred for high fiber content – exhibited a more homogeneous photosynthesis with leaf aging and higher growth respiration rate, two physiological traits associated with the highest biomass production among genotypes evaluated.
Synthesis, antiproliferative activity, 3D-QSAR and molecular docking studies of novel L-carvone-derived pyrimidine-urea compounds
Authors: Meng Yupei Meng , Zhang Yunxue Zhang , Duan Wengui Duan , Lin Guishan Lin , Cui Yucheng Cui , Li Baoyu Li
Published: July 2023

In order to explore novel antiproliferative compounds, twenty L-carvone-derived pyrimidine-urea compounds 4a – 4t were synthesized through the multi-step reaction of L-carvone, and structurally characterized by FT-IR, 1H-NMR, 13C-NMR, and HRMS. Besides, the in vitro antiproliferative activities of the target compounds against HepG2, Hela, and MCF-7 cells were evaluated by MTT assay. According to the results, the target compounds showed certain inhibitory activities against the tested cancer cell lines, and five compounds (4b, 4h, 4k, 4l, and 4t) exhibited better inhibition activities against Hela cell than the positive control (5-FU). Among them, compound 4b held significant antiproliferative activities against Hela and HepG2 cells, and thus deserved further study as a leading compound of new anticancer drugs. In addition, an effective and reasonable 3D-QSAR model was built by CoMFA method to analyze the relationship between the structures of the target compounds and their antiproliferative activities (expressed as pIC50) against Hela cell, and proven to have good predictive ability. Molecular docking was carried out to study the binding modes of compound 4b and Survivin which can enter the butt pocket like potential Survivin inhibitor GDP366, forming hydrogen bonding and hydrophobic interactions similar to each other.
Analysis of mechanical response mechanism and energy evolution characteristics of saturated coal with a single pre-existing hole
Authors: Lai Xingping , Fang Xianwei , Shan Pengfei , Gu Helong , Zhan Shuai , Liu Xudong
Published: July 2023

It is very important to elucidate the mechanical mechanism of the effect of water injection and large-diameter borehole pressure relief on coal rock deformation and failure for improving the pertinence and effectiveness of coal mine dynamic disaster prevention measures. In order to obtain the mechanical response mechanism and energy evolution characteristics of saturated coal with a single pre-existing hole, uniaxial compression test was carried out, and the failure process and acoustic emission characteristics of coal were monitored by using high-speed camera and acoustic emission monitoring system. The results show that the strength of coal samples deteriorated by 23.49%, 9.47% and 47.95% respectively by water saturation, single pre-existing holemeasures and the coupling effect of the two measures. The final failure mode of coal samples with different measures is shear failure mode. The law of fracture development and expansion and energy accumulation and release in different coal samples is roughly the same, but the speed of energy accumulation and release in different stages is different. Water saturation and single pre-existing hole measures can affect the impact risk of coal samples, and water saturation can significantly reduce the impact tendency of coal samples, and reduce the impact energy index of complete coal samples by 56.59%. The impact tendency index of natural coal sample is slightly increased by single pre-existing hole measures, and the impact energy index of intact coal sample is reduced by 46.78% by the coupling of saturated water and cavity measures. It can provide technical support for coal mine power disaster prevention and control.
A Novel Arithmetic Ant Colony Hybrid Optimization Algorithm for Numerical Computing
Authors: Wang Hongbo , Mo Yuanbin
Published: July 2023

The problem of finding all extremal points of a multimodal function and integrating complex functions are among the challenging problems in the field of intelligent optimization. To solve these numerical computation problems, a hybrid optimization algorithm named AOA-ACO, which combines the arithmetic optimization algorithm (AOA) and the ant colony optimization (ACO), is proposed in this paper. AOA is a newly proposed meta-heuristic algorithm in recent years, which has strong global exploration ability and local exploitation ability, and its optimization process has excellent characteristics of randomness and dispersion. ACO, on the other hand, has the characteristics of distributed computing and uses a positive feedback mechanism, but it is difficult to escape local optimum. Based on the characteristics of these two algorithms, AOA-ACO retains the position updating strategy of AOA and incorporates AOA's multiplication and division strategy and addition and subtraction strategy into the ACO optimization process, to enhance the balance between the algorithm's global exploration ability and local exploitation ability while maintaining its diversity, thereby improving the algorithm's computational accuracy y and convergence speed. The numerical experimental results show that compared with other intelligent optimization algorithms, AOA-ACO can calculate extremal points and integrals more accurately and with faster convergence speed.
AMS(2010)68W40
Distinct brain morphometry patterns revealed by deep learning improve prediction of aphasia severity
Authors: Teghipco Alex , Newman-Norlund Roger , Fridriksson Julius , Rorden Christopher , Bonilha Leonardo
Published: July 2023

Emerging evidence suggests that post-stroke aphasia severity depends on the integrity of the brain beyond the stroke lesion. While measures of lesion anatomy and brain integrity combine synergistically to explain aphasic symptoms, significant interindividual variability remains unaccounted for. A possible explanatory factor may be the spatial distribution of brain atrophy beyond the lesion. This includes not just the specific brain areas showing atrophy, but also distinct three-dimensional patterns of atrophy. Here, we tested whether deep learning with Convolutional Neural Networks (CNN) on whole brain morphometry (i.e., segmented tissue volumes) and lesion anatomy can better predict which individuals with chronic stroke (N=231) have severe aphasia, and whether encoding spatial dependencies in the data might be capable of improving predictions by identifying unique individualized spatial patterns. We observed that CNN achieves significantly higher accuracy and F1 scores than Support Vector Machine (SVM), even when the SVM is nonlinear or integrates linear and nonlinear dimensionality reduction techniques. Performance parity was only achieved when the SVM was directly trained on the latent features learned by the CNN. Saliency maps demonstrated that the CNN leveraged widely distributed patterns of brain atrophy predictive of aphasia severity, whereas the SVM focused almost exclusively on the area around the lesion. Ensemble clustering of CNN saliency maps revealed distinct morphometry patterns that were unrelated to lesion size, highly consistent across individuals, and implicated unique brain networks associated with different cognitive processes as measured by the wider neuroimaging literature. Individualized predictions of severity depended on both ipsilateral and contralateral features outside of the location of stroke. Our findings illustrate that three-dimensional network distributions of atrophy in individuals with aphasia are directly associated with aphasia severity, underscoring the potential for deep learning to improve prognostication of behavioral outcomes from neuroimaging data, and highlighting the prospective benefits of interrogating spatial dependence at different scales in multivariate feature space.
Main genes in breast cancer primary tumor and first metastasis in lymph nodes revealed by information-theory-based genetic networks analysis
Authors: Martínez-Vargas Irving , León-Pineda Moises , Alvarado-Mentado Matías
Published: July 2023

In this paper we identify genes that could be principal in breast cancer primary tumor and its firstmetastasis in lymph nodes, within biopsies in GEO and GDCDP database. By applying Information-Theory-based algorithms for processing gene expression profile matrices, we got the genetic networks ofnext tissues: 1) breast cancer free, 2) breast cancer primary tumor, and 3) first metastasis of breastcancer in lymph nodes. The topology analysis in the genetic networks allows for identifying gene-nodesdegree and the mutual information between pairs of genes. The late gene ontology based analysis on themolecular and functional character of genes with highest degree and mutual information confirm theirrelevance in the mentioned processes and reveals specific signaling pathways signature in cancer-free tissueand in the tumor microenvironment associated with primary and metastasis requirements. As well, thestate-of-the-art review on genes functional role identify tumor-suppressor genes in cancer-free tissue andproliferation and migration-associated genes in cancer.
On the application of virtual reality technology in the teaching of "landscape architecture design"
Authors: Yu Anping
Published: July 2023

"Landscape Architecture Design" is an important basic design course for undergraduates majoring in landscape architecture in China. The teaching focus is to cultivate students' cognition and design of three-dimensional garden space. At present, the classroom teaching of "Landscape Architecture Design" has a limited space dimension of course teaching. Virtual reality (VR) technology has immersive, the three characteristics of interactivity and conception can help teachers to enrich the form of classroom teaching, cultivate students' spatial thinking, and enhance students' spatial simulation experience. Focusing on the key points of virtual reality (VR) technology, this paper discusses the application of virtual reality (VR) technology in The specific implementation method in the course of "Landscape Architecture Design": in the teaching preparation process, teachers can use virtual reality technology to build a three-dimensional panoramic courseware library of landscape architecture cases, and students can break the geographical restrictions and enter the virtual scene to experience all parts of the world. Excellent garden landscape, at the same time, teachers can select excellent garden space cases according to the teaching theme, and collect VR information; secondly, in the classroom teaching, teachers can use projection equipment or students to use simple VR glasses to watch the panoramic cases that have been made.
Probabilistic Liquefaction Potential of Kathmandu Valley Soil Based on Standard Penetration Tests
Authors: Subedi Mandip , KC Rajan , Acharya Indra Prasad , Sharma Keshab , Bhandary Netra Prakash
Published: July 2023

Despite being a liquefaction susceptible zone, Kathmandu Valley soil in Nepal has limited studies on liquefaction potential and most of them are based on the deterministic approach. Although this method is widely used, it ignores the uncertainties of seismic parameters such as peak ground acceleration, amax, and earthquake magnitude, Mw as well as the inherent variabilities of soil layers, in-situ testing procedures, and geotechnical properties. On the other hand, the probabilistic approach helps assess the liquefaction potential by considering all these uncertainties. In this study, we assess the liquefaction hazard in the Kathmandu Valley using the first-order second-moment (FOSM) method as a probabilistic approach for liquefaction hazard assessment. The assessment is done for three likely-to-recur scenario earthquakes utilizing the geotechnical data of 1510 boreholes. The soils are characterized geotechnically to further assess susceptibility criteria of liquefaction in the valley. The assessment reveals that the central part of the valley is more vulnerable to liquefaction than other parts and the liquefaction probability increases with increasing depth up to 9 m, after which has geared down the value. Moreover, a relationship between the probability of liquefaction (PL) and the factor of safety (FS) against liquefaction is established. The hazard maps prepared for different earthquake scenarios can be useful for future infrastructure planning in Kathmandu Valley.
Effects of Economic Growth, Electricity Consumption, Energy Use, and Urbanisation on Carbon Dioxide Emissions in Vietnam
Authors: Anh Tru Nguyen
Published: July 2023

The aim of this paper was to explore the causal relationship between CO2 emissions, economic growth, electricity consumption, energy use, and urbanisation in Vietnam between 1982 and 2016 using the Vector Error Correction Model (VECM). In the short run, it has been empirically proven that GDP, electricity consumption, and energy use have significant and positive relationships with CO2 emissions in Vietnam. Results also indicated that electricity consumption and energy use are the main contributors to increase GDP while CO2 emissions and urban population negatively affect GDP. It was also found that GDP has a significant and negative impact on electricity consumption, but energy use positively affects electricity consumption in Vietnam. Further, urban population has a negative influence on energy use, while the latter has a positive relationship with urban population. In the long run, results showed that GDP per capita and energy use per capita have significant and positive influence on CO2 emissions in Vietnam while urban population contributes to reducing CO2 emissions. The results of the Johansen co-integration test showed that there is a long run relationship between CO2 emissions, economic growth, electricity consumption, energy use, and urbanisation. Results implied that economic growth should be considered by the Vietnamese government along with the target in environmental protection, and urbanisation should be carefully managed to achieve sustainable development in Vietnam.
COVID-19 Pandemic and Stock Market Response: The Role of COVID-induced Fear, Investor Attention, and Firm-specific Characteristics
Authors: Sahil Narang  , Savita  , Rudra P. Pradhan  , Bhanwar Singh
Published: July 2023

The study examines the reaction of S&P BSE 500 companies to the outbreak of the 2019 novel coronavirus (COVID-19). The impact of COVID-19 induced fear of volatility index (VIX) on stock market returns and the role of pre-pandemic firm-specific characteristics in intensifying/reducing the effect of fear on stock returns are analysed. Event study methodology and panel data approach with firm and industry-time fixed effects are employed. The results show fear of VIX plays a significant role in the downfall and subsequent recovery of the stock market. It is witnessed the role of pre-pandemic firm- specific characteristics is heterogeneous in intensifying/reducing the effect of fear on stock returns. Investor attention (Google search volume) and the growth of COVID-19 cases are also crucial to the stock market movements during the study period.
CEO’s Characteristics and CSR Disclosure: Evidence from Islamic Banks across MENA Region
Authors: Jamel Chouaibi  , Wafa Jilani  , Salim Chouaibi
Published: July 2023

The purpose of this paper was to explore the relationship between the characteristics of the chief executive officer (CEO) and corporate social responsibility (CSR) of banks operating in the Middle East and North African (MENA) countries. The study hypotheses was tested using a multiple linear regression model by examining data from a sample of 97 Islamic banks operating in the MENA region between 2015 and 2019. The results were robustly checked and the findings indicated that both CEO’s overconfidence, experience and education appear to have a significantly positive effect on the CSR disclosure. Furthermore, the results of multiple linear regressions showed that older CEO’s have a negative and significant impact on the level of CSR disclosure. This research bridges the gap between theory and practice in many aspects. Thus, although a substantial volume of research has examined sustainable advantage, one vital aspect of CSR has been largely unexplored. This study fills this void in the literature, namely the interaction between CEO’s characteristics and CSR disclosure. An explicit CSR disclosure may improve social well-being in emerging markets.
Impact of Globalisation on Innovation of Small and Medium Enterprises in Vietnam
Authors: Nguyen Ngoc Thuy Vy  , Do Thi Thanh Nhan  , Thu-Quang Luu  , Wing-Keung Wong
Published: July 2023

Innovation contributes to improved labour productivity and an enhanced competition, thereby ensuring to the development of the firm. However, small and medium enterprises (SMEs) encounter many difficulties in attempts to innovate. It is not clear whether globalisation works to encourage firms to innovate via transferring knowledge and promote market competition mechanism; or whether it works against such innovation due to a negative impact on the diversification of different dimensions in economic, social, and political life. The primary purpose of this research was to examine how globalisation affects innovation among SMEs in Vietnam. It analyses the micro and macro effects of globalisation on innovation in businesses using a Probit model with data obtained from selected SMEs during the period 2005–2015. The result showed that at a macro level, globalisation negatively correlates with innovation. Additionally, it was found that economic and political globalisation facilitates innovation while social globalisation discourages it. At the micro level, increasing competitive pressure and knowledge transfer due to globalisation are positively correlated with the propensity towards innovation of SMEs.
Recovery of non-ferrous metals from sulfide ores by bioleaching on the example of the Allarechensk technogenic deposit
Authors: Latyuk E. S. , Goryachev A. A. , Kompanchenko A. A.
Published: July 2023

The possibility of processing sulfide copper-nickel raw materials by heap bioleaching due to the environmental attractiveness of this approach is becoming an increasingly relevant topic for mining and processing. On the example of the Allarechensk technogenic deposit ore, the effectiveness of the bioleaching method for the copper and nickel recovery has been considered. The content of metals in the original ore sample: nickel – 2.42 % and copper – 0.75 %. The ore grinded to the size of –5+3 mm has been irrigated with a solution containing a strain of Acidithiobacillus ferrivorans. The S : L ratio is 4 : 1, the flow rate is equal to 0.1 mL/min. In pregnant solutions, the pH and redox potential values have been controlled, and the concentrations of ferrous and ferric iron, copper, and nickel ions have also been measured. The experiment duration is 11 months, 8.9 % nickel and 6.1 % copper have been recovered. Copper has been extracted from pregnant solutions by cementation on iron, the maximum recovery is 97.3 %. Thus, it has been shown that the proposed scheme for the recovery of metals is promising for the processing of sulfide raw materials, in particular, low-grade ores and enrichment waste.
Reconstruction of the conditions for the formation of red-colored sandstones of the Tersky coast based on a comparative analysis of the structure of ancient and modern deposits (Kola Peninsula)
Authors: Neradovsky Yu. N.
Published: July 2023

The paper presents the results of studying the Riphean red-colored sandstones of the Tersky coast of the White Sea. 21 structural elements characterizing the conditions of rock formation have been considered, including 15 ancient and 6 modern deposits. Observations were carried out for 10 years in two areas of the White Sea coast. The purpose of the research is to establish the reasons for the absence of organic matter, the origin of the hematite admixture in the Riphean sandstones, and to assess the climatic conditions during their formation. These issues are key to identifying the Proterozoic red formation. The data have shown that some rock structures are similar in ancient and modern deposits. Such structures include, for example, wave ripples repeating in detail the dimension, shape, and orientation in both epochs, and therefore can be used to assess ancient marine sedimentation conditions. However, most of the structures testify to fundamental differences in the conditions of rock formation. It has been established that takyrs were systematically formed in ancient rocks and hematite was deposited, which indicates the arid climate in the Riphean and the specific composition of sea water. The most important difference between ancient deposits is the absence of fauna and flora in them.
Annual modulation of dark matter signals: Experimental results and new ideas
Authors: Kahlhoefer Felix
Published: July 2023

Direct detection experiments searching for the scattering of dark matter particles off nuclei expect an annual modulation in their event rate. In this presentation, I will review the theoretical predictions and the experimental status of the search for annual modulations, with a focus on ongoing and planned experiments using NaI detectors. In particular, I will discuss the interpretation of the DAMA signal and related model-building efforts.
Ionization efficiency at sub-keV energies for crystals and noble liquids
Authors: Sarkis Youssef , Aguilar-Arevalo Alexis A. , D'Olivo Juan Carlos
Published: July 2023

We study the ionization and light yields produced by nuclear recoils at low energies in pure crystals and noble liquids in the context of Lindhard’s integral equation, incorporating the effects of binding energy, improved modeling of the electronic stopping, and electronic straggling. We consider three different models for the electronic stopping power that incorporate Coulomb repulsion effects at low energies, and Bohr electronic stripping for high energies. Finally, we discuss possible new effects near threshold.
The CYGNO/INITIUM experiment
Authors: Amaro F. D. , Baracchini Elisabetta , Benussi L. , Bianco S. , Capoccia C. , Caponero M. , Santos Cardoso D. , Cavoto Gianluca , Cortez A. , Costa I. A. , Dané E. , Dho Giorgio , Di Giambattista F. , Di Marco E. , D’Imperio G. , Iacoangeli F. , Jùnior H. P. , Lopes G. S. P. , Maccarrone G. , Mano R. D. P. , Gregorio R. R. M. , Marques D. J. G. , Mazzitelli G. , McLean A. G. , Messina A. , Monteiro C. M. B. , Nobrega R. A. , Fonseca Pains I. , Paoletti E. , Passamonti L. , Pelosi S. , Petrucci F. , Piacentini S. , Piccolo D. , Pierluigi D. , Pinci D. , Prajapati A. , Renga F. , Roque R. J. C. , Rosatelli F. , Russo A. , dos Santos J. M. F. , Saviano G. , Spooner N. J. C. , Tesauro R. , Tommasini S. , Torelli S.
Published: July 2023

The CYGNO project for the development of a high precision optical readout gaseous TPC for directional Dark Matter search and solar neutrino spectroscopy will be presented. It is to be hosted at Laboratori Nazionali del Gran Sasso. CYGNO peculiar features are the use of sCMOS cameras and PMTs coupled to GEMs amplification of a helium-based gas mixture at atmospheric pressure, in order to achieve 3D tracking with head tail capability and background rejection down to O(keV) energy, to boost sensitivity to low WIMP masses. The latest R&D results within the CYGNO project will be discussed along with the underground installation and operation of a 50 l prototype, soon to be followed by a O(1) m3 experiment demonstrator in 2024-2026. The latest results on the negative ion drift operation at atmospheric pressure within CYGNO optical readout approach will be illustrated, which is the aim of the ERC Consolidator Grant project INITIUM.
Dark Matter: DAMA/LIBRA and its perspectives
Authors: Bernabei Rita , Belli Pierluigi , Cappella Fabio , Caracciolo Vincenzo , Cerulli R. , Dai C. J. , d'Angelo A. , Incicchitti Antonella , Leoncini Alice , Ma X. H. , Merlo Vittorio , Montecchia F. , Sheng X. D. , Ye Z. P.
Published: July 2023

The long-standing model-independent annual modulation effect measured by DAMA deep underground at Gran Sasso Laboratory with different experimental configurations is summarized and perspectives will be highlighted. DAMA/LIBRA-phase2 set-up, \simeq≃ 250 kg highly radio-pure NaI(Tl) confirms the evidence of a signal that meets all the requirements of the model independent Dark Matter annual modulation signature at high C.L.; the full exposure is 2.86 ton \times× yr over 22 annual cycles. The experiment is currently collecting data in the DAMA/LIBRA-phase2 empowered configuration with an even lower software energy threshold. Other recent claims are shortly commented.
Midnight Reflections about our own Northern Ventriloquist's Skills
Authors: Carrasco Mauricio , Garnero Fernando
Published: July 2023

“Midnight Reflections about our own Northern Ventriloquist's Skills” is articulated in the form of a podcast in a conversational style scripted by longtime collaborators composer and performer. It starts by cartographing the authors’ previous collaborative works until they approach their last project ensemble, Campo Amniótico [CA] (2021), work in which the feedback or Larsen plays a paramount role, making the artwork highly unstable and elusive. As a result, performers and composer are in constant trouble, stripped of their cognitive performativity by the once enhancer technology, that in CA becomes almost a threat.
That’s when the podcast starts to interact with recorded extracts of philosophers Rosi Braidotti and Achille Mbembe, and psychologist Thirusha Naidu on issues concerning posthumanism, postcolonialism and technological escalation. By applying and discussing their theories in the field of artistic research and, more specifically, in that of contemporary music, the authors will situate CA as a post-human artwork that aims to tip the balance more towards subversion than the status quo. That is following Eve Sedwick's precept, when she said twenty years ago with some disillusionment that the result of a work is usually always the same: a little subversive, a little hegemonic.
Homo Electromagneticus II: Paradigms and Paradoxes
Authors: Bento Alexandre
Published: July 2023

Homo Electromagneticus is a musical performance realized in 2022 through a set of original instruments created with open-source and low-cost technologies. Arduino microcontrollers, sensors, brainwaves, MIDI, algorithms, and the interaction with plants’ capacitance provide digital, acoustic and mechatronic sound production forms. Cognizant of the material and energy dump that is the signature of the Anthropocene, the piece thrives on a commitment to the conscientious and responsible production of waste. Thus, in addition to original musical instruments, I also utilized old bottles, kitchen tools, electronics equipment taken from the dump, obsolete musical instruments, human gestures and brain waves as research and performance tools.   
Homo Electromagneticus reacts to the exclusivity of digital sound production, choosing instead to revitalize and promote acoustic sound production. Thinking along with Zielinski (2010), the piece helps us to consider art “after the media,” meaning that it foregrounds the production of acoustic sound mediated through electromagnetic interfaces. The technological aspect of production is prevalent, but digital and electric sound production does not dominate the performance of the work as a whole.
The performance relies on the emergence of a mix compositum in which the distinction between performer and composer becomes blurred. Each performance of the piece requires the players to generate sound anew. Additionally, the very definition of musical “instrument” undergoes a transformation since the performer becomes, in a sense, a necessary instrument in the production of the piece.
Listening is Action: A Soundwalk with Hildegard Westerkamp
Authors: Velasco-Pufleau Luis
Published: July 2023

In the sound documentary Listening is Action, the composer Hildegard Westerkamp engages in a conversation with Luis Velasco-Pufleau at her home in the city of Vancouver, which is situated on the traditional, ancestral, and unceded territories of the xʷməθkʷəy̓əm (Musqueam), Sḵwx̱wú7mesh (Squamish), and səlilwətaɬ (Tsleil-Waututh) Nations. She talks us through her first field recordings and her soundwalking practice, her work at the Vancouver Co-operative Radio, and her participation in the World Soundscape Project, all of which started or took place in the 1970s. Furthermore, she takes us on soundwalks at places she used to go and record more than thirty years ago, such as those now called Kitsilano Beach and Vancouver’s Downtown Eastside, and that constitute the sources for her soundscape works A Walk Through the City (1981) and Kits Beach Soundwalk (1989). This sound documentary is an invitation to listen more attentively to the multiple voices that inhabit our environments in order to imagine new, plural, and unforeseen realities. The sound work Listening is Action is enhanced by a written commentary in which Luis Velasco-Pufleau explores the radical relationality of listening and the connection between Westerkamp’s thinking with the work of Pauline Oliveros and Hannah Arendt. Finally, he engages with critical listening positionality in order to reflect on some of the limits and contradictions present in the sound documentary.
Environmental, Social, and Governance Risk on Firm Performance: The Mediating Role of Firm Risk
Authors: Yudhanto Wildan , Simamora Alex Johanes
Published: July 2023

Business sustainability can be improved by achieving Environmental, Social, and Governance (ESG) aspects. The research aimed to examine the effect of ESG risk on firm risk and performance, the effect of firm risk on performance, and the mediating role of firm risk between ESG risk and performance. The research sample included 150 firms listed on the Indonesia ESG Leaders Index in Indonesian Stock Exchange in 2020-2022. The research measured ESG risk by the value of ESG risk, firm risk by stock return volatility, and performance by Return on Asset (ROA) and Tobin’s Q. Data analysis applied path analysis. Based on data analysis, lower ESG risk reduces firm risk and increases performance. Moreover, lower firm risk increases performance, and lower ESG risk increases performance through firm risk reduction. The result indicates that lower ESG risk captures the ability of ESG implementation to reduce the risk of economic value and give benefit to reducing costs of conflict, uncertainty, and bad reputation risk. Furthermore, lower ESG risk improves performance by helping firms to promote higher revenue and cost efficiency. In additional analysis, the effect of lower ESG risk on firm risk reduction and performance improvement occurs more for firms in the environmentally sensitive industry. The results show that industry sensitivity strengthens the positive effect of ESG risk on firm risk and the negative effect of ESG risk on performance. The research contributes to giving new evidence of ESG risk on firm risk and performance in Indonesia since ESG risk assessment is a new evaluation on the Indonesian Stock Exchange.
Treatment of anemic syndrome in patients receiving surgical and chemotherapeutic treatment for breast and colorectal cancer
Authors: Khagazheeva M. N. , Snegovoy A. V. , Blindar V. N. , Kelemetov A. M. , Starostin N. M. , Taasheva Z. Z.
Published: July 2023

Introduction. Anemia syndrome is a common disease that reduces the quality and life expectancy of cancer patients. Prevention, timely diagnosis and effective treatment of anemia are statistically significantly associated with a favorable clinical outcome of the treatment of patients, and also contributes to better tolerability of anticancer therapy.Aim. Evaluation of the effectiveness of oral iron preparations and parenteral use of erythropoietin-alpha in patients with breast cancer and colorectal cancer, iron deficiency anemia or severe iron deficiency, immediate and long-term results of treatment, as well as the quality of life of patients with breast cancer and colorectal cancer.Materials and methods. A retrospective analysis of the material from the Blokhin National Medical Research Center of Oncology, involved 133 patients (validation group 68 people, control group – 65 people), patients with breast cancer or colorectal cancer, suffering from anemia. Depending on the form of anemia, patients were prescribed therapy – oral iron preparations with epoetin alfa in combination or in monotherapy. The effectiveness of therapy was assessed by the rate of blood hemoglobin. Analysis and statistical processing of results using IBM SPSS Statistics 26.0. Survival analysis was carried out using the KaplanMeier method. Descriptive statistics methods are used to analyze socio-demographic and traditional patients.Results. With a median follow-up of 61.2 months, the exclusion groups did not have significant differences in overall survival (p > 0.05). However, the group of patients with IDA who received therapy to correct the anemic syndrome and the group with FDA without adequate therapy had a greater significance in terms of 5-year OS (93.5 and 69.6%, respectively; p = 0.02). There were also no significant values for the 5-year DFS indicator (p > 0.05). However, the groups of patients with IDA who received and did not receive therapy to correct anemia probably made a big difference in terms of 5-year DFS (90.3 and 63.9%, respectively; p = 0.025). The group of patients with IDA treated with anemia to correct anemic syndrome clearly differed from the group of patients with FAD without therapy to correct anemia in terms of 5-year OS (90.3 and 43.6%, respectively; p < 0.001).Conclusions. Carrying out antianemic therapy can significantly increase the 5-year relapse-free survival in patients with iron deficiency anemia (90.3 and 63.9%, with and without therapy, respectively; p = 0.025).
Ch1 (Vitis vinifera L.) Rootstock Control of Scion Response to Water Stress in Some Commercial Grapevine Cultivars
Authors: Rahmani H. , Rasoli V. , Abdossi V. , Ghanbari Jahromi M.
Published: July 2023

Drought stress is the most important environmental factor limiting the growth, development and yield of crop plants and horticulture. In this study, the induction of drought resistance in commercial cultivars (as scion) by the Ch1 rootstock was evaluated based on physiological and biochemical responses. Factorial experiment was performed in a completely randomised design (CRD) with three replications in the greenhouse. Plant materials consisted of five commercial grapevine cultivars (own-rooted plants of Black seedless, Flame seedless, Turkman seedless, Sultana and Shahani, and the scion of these cultivars grafted onto Ch1 rootstock). Drought stress treatment comprised stopping irrigation for 30 days from July to August, and not stopping irrigation was the control. Drought stress significantly reduced the membrane stability index (MSI) and the relative water content (RWC), and increased electrolyte leakage (EL), catalase, hydrogen peroxide, proline, ascorbic acid, guaiacol peroxidase, protein, sodium and potassium levels (P < 0.05). The EL and MSI in the Ch1 rootstock under drought stress decreased by 18.38% and 14.86% respectively. The Ch1 rootstock significantly increased the amount of proline, total protein and enzyme activity of guaiacol peroxidase and catalase in cultivars in a drought stress environment. The amount of hydrogen peroxide decreased in all cultivars grafted on Ch1 in both drought stress and non-drought stress environments, by 14.3% and 18.9% respectively. Sultana cultivar grafted on Ch1 rootstock showed the highest drought resistance. Therefore, it can be concluded that the Ch1 rootstock is recommended as a rootstock for inducing drought resistance in grapevine cultivar scions.
Community health impacts after a jet fuel leak contaminated a drinking water system: Oahu, Hawaii, November 2021
Authors: Miko Shanna , Poniatowski Alex R. , Troeschel Alyssa N. , Felton Diana J. , Banerji Shireen , Bolduc Michele L. F. , Bronstein Alvin C. , Cavanaugh Alyson M. , Edge Charles , Gates Abigail L. , Jarvis Madeline , Mintz Nicole A. , Parasram Vidisha , Rayman Jamie , Smith Amanda R. , Wagner Jared C. , Gerhardstein Benjamin G. , Orr Maureen F.
Published: July 2023

Background: In 2021, a large petroleum leak contaminated a water source that supplied drinking water to military and civilians in Oahu, Hawaii. Methods: We conducted an Assessment of Chemical Exposures (ACE) survey and supplemented that information with complementary data sources: (1) poison center caller records; (2) emergency department visit data; and (3) a key informant questionnaire. Results: Among 2,289 survey participants, 86% reported ≥1 new or worsening symptom, 75% of which lasted ≥30 days, and 37% sought medical care. Most (n = 1,653, 72%) reported new mental health symptoms. Among equally observable symptoms across age groups, proportions of children ≤2 years experiencing vomiting, runny nose, skin rashes, and coughing (33, 46, 56, and 35%, respectively) were higher than other age groups. Poison center calls increased the first 2 weeks after the contamination, while emergency department visits increased in early December 2021. Key informant interviews revealed themes of lack of support, mental health symptoms, and long-term health impact concerns. Discussion: This event led to widespread exposure to petroleum products and negatively affected thousands of people. Follow-up health surveys or interventions should give special consideration to longer-term physical and mental health, especially children due to their unique sensitivity to environmental exposures.
Evaluación de caudal de sobrepaso en una defensa costera mediante un modelo basado en las ecuaciones de Navier-Stokes promediadas por Reynolds en el volumen (VARANS)
Authors: Campos-Caba Rodrigo , Winckler Patricio
Published: July 2023

En este trabajo se expone el proceso de calibración del modelo numérico IH2VOF y un análisis de sensibilidad del caudal de sobrepaso en una defensa costera. Para efectuar estos trabajos, se replican los ensayos de un modelo físico a escala reducida de 1:50 en el rompeolas principal del puerto de Pòvoa de Varzim, Portugal (Neves et al., 2008). Los parámetros analizados en el proceso de calibración corresponden a la porosidad y los coeficientes de fricción lineal y no-lineal , que caracterizan a los medios porosos. Para ensayos con oleaje irregular y generación de oleaje de primer orden, que incorpora sólo la banda espectral asociada al oleaje como condición de borde, los parámetros de fricción no tienen una gran incidencia en el cálculo del sobrepaso, pues actúan sobre un volumen relativamente pequeño de defensa costera. La porosidad, en contraste, juega un rol no despreciable en los resultados. Una vez calibrados estos parámetros, se repiten los ensayos usando un forzamiento de segundo orden, que incorpora tanto la banda del oleaje como las ondas infragravitatorias asociadas a los grupos de olas. Los resultados muestran que la generación de primer orden sobrestima el caudal de sobrepaso, lo que se hace más evidente para condiciones de oleaje de mayor intensidad. Para el forzamiento de segundo orden, en contraste, se obtienen resultados cercanos a los reportados por Neves et al. (2008). Finalmente, se recomienda utilizar el forzamiento de segundo orden tanto en la modelación numérica como física del sobrepaso de oleaje para evitar el sobredimensionamiento injustificado de defensas costeras.
Sistema constructivo de una fundición de cobre del siglo XIX en Atacama, Chile
Authors: Nazer Amin , Pavez Osvaldo
Published: July 2023

La minería ha ocupado un sitial importante en la economía chilena desde el siglo XIX y hasta nuestros días. Sin embargo, los oscilantes ciclos de bonanzas y de crisis económicas del sector minero, han dejado vestigios de edificaciones industriales de la minería y la metalurgia del cobre de características muy singulares. El objetivo de este artículo es describir la materialidad y origen del sistema constructivo utilizado en las ruinas de una ex fundición de cobre del siglo XIX ubicada en el puerto de Caldera, en el norte chileno. Los vestigios de las edificaciones, muestran que los cimientos y muros construidos con bloques de escoria de cobre fundida y moldeada in situ, fue una técnica constructiva traída por los constructores y metalurgistas ingleses que arribaron a los centros mineros de Atacama, replicando las técnicas utilizadas en obras inglesas, actividad que permitió valorizar los residuos metalúrgicos.
Calefacción distrital en Chile y avances en la investigación de interacción entre suelo y tuberías en redes de calefacción distrital
Authors:   Universidad Católica de la Santísima Concepción, Villalobos Felipe , Weidlich Ingo , Wolf Ingo , Fumeron Javier
Published: July 2023

El alto nivel de contaminación atmosférica en las ciudades del centro y sur de Chile debido en gran parte a la combustión de leña ocasiona graves daños a la salud de las personas, tala de bosque nativo, incendio de viviendas y deceso de personas. Una alternativa funcionando por más de 100 años en el hemisferio norte es la calefacción distrital. En Chile existen dos sistemas de calefacción distrital funcionando por varias décadas y en los últimos años pequeños proyectos lentamente en aumento. Se plantea promover la calefacción distrital para un mayor número de población, ya sea usando fuentes de energía industriales que son desperdiciadas o de energía renovable no contaminante. Luego, se enfoca el análisis a la red de tuberías de distribución subterránea en relación a su interacción con el suelo en términos mecánicos y térmicos. Estas tuberías son de acero, aisladas con espuma y protegidas con un encamisado plástico. Se presentan resultados de mediciones en un circuito de tuberías instrumentado conectado a una red de calefacción distrital en operación. Los desplazamientos axiales de las tuberías en condiciones estacionarías son posibles de estimar adecuadamente mediante las metodologías de cálculo disponibles. Sin embargo, condiciones estacionarias de cambios bruscos de temperatura y presión son difíciles de estimar.
Competencias digitales y habilidades blandas de los estudiantes universitarios en el aprendizaje electrónico en tiempos de COVID-19
Authors: Loayza Maturrano Edward Faustino
Published: July 2023

El aprendizaje facilitado por tecnología es una oportunidad que surge a partir de la necesidad provocada por el confinamiento social en tiempos de la pandemia de la COVID-19. El objetivo del estudio es determinar las características de las competencias digitales de los estudiantes universitarios para alcanzar la efectividad en su formación en el contexto de la educación a distancia. El trabajo compara el nivel de competencias digitales de los estudiantes con el nivel de desarrollo de las habilidades blandas que garantizan la calidad del aprendizaje en un entorno de educación remota. Se aplicó un cuestionario de treinta y tres preguntas a una muestra de 116 discentes de pregrado de cinco carreras profesionales de una universidad pública con el fin de describir las características de los niveles de las competencias digitales e interpretar su relación con las habilidades blandas. Los resultados muestran que, a pesar del alto nivel de las habilidades digitales de los estudiantes, estos no utilizaron todas esas habilidades en el entorno educativo electrónico en el periodo de pandemia. Se concluye en el estudio que las habilidades más complejas e importantes relacionadas con la adquisición independiente de información, la planificación del trabajo propio, y las habilidades blandas referidas a la interacción en equipo, la comunicación con otros, entre sus pares, profesores y administración son las menos desarrolladas en la mayoría de los encuestados.
Fundamentals of Semiconductor Physics
Authors: Roy Sunipa , Kumar Ghosh Chandan , Dey Sayan , Kumar Pal Abhijit
Published: July 2023

In recent times, crystalline semiconductors have played a major role in
device fabrication for all purposes, where crystal structure plays the most crucial role.
Herein, all kinds of fundamental unit cell structures have been briefly discussed,
whereas Miller indices have been introduced to illustrate the orientation of the crystal
structures. Basic quantum mechanics have been introduced in order to explain the
fundamental properties of semiconducting materials. In this context, Sommerfeld’
free electron theory has been considered. Although this model corroborates with a few
experimental observations, but can’t differentiate between semiconductors, insulators
and metals. Then Kronig – Penney, which successfully explains the deviation on the
basis of the band concept, has been considered. Following the Kronig – Penney model,
Bloch’s theory has been introduced, and it well explains the origin of conduction and
valence bands. From this concept, different types of semiconducting materials, e.g.,
direct and indirect band gap semiconductors, n- and p-type semiconductors, etc., have
emerged. Here, properties of charge carriers, such as their charge, effective mass etc.,
have also been discussed. Knowing these parameters, conductivity expression and
related scattering phenomena influencing conductivity have been briefly elaborated.
Semiconductor Devices
Authors: Roy Sunipa , Kumar Ghosh Chandan , Dey Sayan , Kumar Pal Abhijit
Published: July 2023

Semiconductor materials are beneficial in their performance and can be
easily deployed by the addition of impurities known as doping. The resistivity of the
semiconductor can be changed by incorporating the electric or magnetic field, light
or heat, or mechanical distortion. Therefore, semiconductors can make excellent
devices. Current conduction in a semiconductor happens due to free electrons and
holes, jointly known as charge carriers. Doping of silicon significantly increases the
number of electrons or holes within the semiconductor, making it “p-type” or “n-type.” This doping characteristic is a blessing to make a possible number of devices
like LED, Tunnel diode, Solar cells, and many more, which have been discussed in
this section.