bluuebunny/crossref_metadata_2025 huggingface dataset:
Mathematical and Numerical Modeling of Repeated Floods from the Siret Basin, Romania, a Risk for Population, Environment, and Agriculture
Authors: Radulescu Victorita
Published: March 2023

In recent decades in Romania, no flood management plan has been implemented in natural riverbeds, although there are known areas that face repeated floods such as the Siret River basin. Practically every year, floods produce uncontrolled erosions and landslides in certain areas, followed by the deposition of sediments, usually on agricultural land, compromising crops indefinitely. This paper analyzes the natural transport capacity of the Siret River based on direct measurements and data recorded during the floods of 2005 and 2020. The mathematical model of the sediment transport is presented, starting with the upstream zone, from the confluence with its main tributaries: Bistrita, Trotus, and Cracau. The recorded flood hydrographs are used in this analysis to model the sediment transport for variable flow rates. The upstream flood hydrograph, the steady downstream level, and the initial riverbed cross-sections represent the boundary conditions. The mathematical model is numerically tested for the risk zones by determining the modifications of the riverbed cross-sections. The variation in time of the liquid and solid phases allows the estimation of the longitudinal riverbed shape with the floodable surfaces. To mitigate the effects of floods—and to protect the population, agricultural lands, and environment—some solutions are finally proposed.
Interdisciplinary Approach and Geodynamic Implications of the Goutitir Geothermal System (Eastern Meseta, Morocco)
Authors: Jeddi El Mehdi , Ntarmouchant Ahmed , Carvalho Maria do Rosário , Bento dos Santos Telmo M. , Ferreira da Silva Eduardo Anselmo , Elabouyi Mustapha , Driouch Youssef , Mali Brahim , Ntarmouchant Nahla , Smaili My Hachem , Cotrim Beatriz , Dahire Mohamed
Published: March 2023

Morocco has an important geothermal potential materialized by its several thermal springs which constitute an essential surface geothermal indicator. These springs are dispersed throughout the country and present in every major structural domain. However, a significant amount is concentrated in the northern and northeastern areas. Associated with the great hydrothermal system of eastern Morocco, the thermal spring of Goutitir emerges in the Meso-Cenozoic sedimentary formations located east of the Guercif Basin, composed of a mixture of clays, carbonates, and marls, covered in unconformity by Quaternary tabular molasses. The upflow of the thermal water is dependent of Alpine faults systems with N30 and N100 directions, which are probable reactivated Hercynian structures that facilitate its circulation to the surface. The Goutitir spring has been studied by an interdisciplinary approach to identify the origin of the thermal water, the rock–water interactions, and the reservoir temperatures, contributing to the establishment of the conceptual model of the associated hydrothermal system. This thermal water is of chloride-sodium type with a hyperthermal character (43–47 °C). The isotopic composition (δ18O = −8.7 to −8.35‰; δ2H = −58.6 to −54.3‰) indicates a meteoric origin and a recharging zone located at around 2000 m of altitude. The chemical composition allows to classify the water as chloride-sodium hydrochemical facies, stabilized at ~100 °C in crystalline basement rocks, which, according to seismic data, are located at ~3 km depth. The concentrations, patterns, and correlations of trace elements point out water–rock interaction processes between the deep water and basic magmatic rocks. The integration of the chemical and isotopic data and the surface geological context shows that the Goutitir water flows within a hydrothermal zone were basic to ultrabasic lamprophyres rich in gabbroic xenoliths outcrop, witnessing the existence, at depth, of basic plutons. Moreover, near the source, these veins are strongly altered and hydrothermalized, showing late recrystallization of centimetric-sized biotites. The chloride-sodium composition of this water may also be a testimony to the presence and reaction with the overlying Triassic saline and gypsiferous and Meso-Cenozoic mainly carbonated formations.
Recovery of Value-Added Compounds from Winery Wastewater: A Review and Bibliometric Analysis
Authors: Santos João R. F. , Rodrigues Rafaela P. , Quina Margarida J. , Gando-Ferreira Licínio M.
Published: March 2023

Value-Added Compounds (VACs) are molecules that have attracted great attention in the literature regarding their potential for integration into existing processes or products. In Winery Wastewater (WW), VACs are valuable because of their antioxidant characteristics. Furthermore, integrated systems for recovery of these molecules and treatment of WW can be a powerful strategy towards an environmentally efficient way of wine production. Therefore, a bibliometric analysis was conducted to establish the status and trace research trends on that topic. The analysis investigated the Web of Science database from 1953–2023, where the software VOSviewer® and R were used. Secondly, an extensive literature review was carried out on VACs recovery from WW by membrane process, which was identified as a promising strategy. As a result, the historical evolution of publications has a growing behavior while citations take time to grow. The most productive authors, journals, and countries were analyzed, with Spain being the leading country in publications on that topic. Lastly, keyword mapping revealed the relevance of “circular economy” and “biorefinery” as knowledge transfer concepts where both traditional and emergent technologies are connected towards the achievement of sustainable development goals. The recovery of phenolic compounds from wine production through membrane processes stands out as a promising technology. Different recovery approaches using membrane processing were assessed in the review. Studies could achieve up to 100% phenolic compound and polysaccharide rejections and also addressed the possibility of fractioning these compounds.
Exploring Strategies to Support Adolescent Mental Health after Parental Divorce: A Scoping Review
Authors: Rich Edna , Butler-Kruger Letitia , Roman Nicolette
Published: March 2023

The recent acceleration in divorce rates and diversification of nuclear families has resulted in an increase in single-parent households. Divorce is one of the most adverse events in a child’s life. Various literature highlights the detrimental effects of parental divorce on children and adolescents, but few studies have emphasized possible support strategies or interventions available to assist in the mental health of adolescents after divorce. The objective of this study was to gain an overview of the strategies and interventions available to adolescents exposed to parental divorce. The current study employed a scoping review method to evaluate the coverage of literature on strategies available to support adolescent mental health after parental divorce. The following databases were searched: Academic Search Premier, Africa-Wide Information, African Journal Online, CINAHL, and JSTOR. A total of eight studies were included in this review. The results show that most mental health interventions target the known mediator of risk, such as parenting problems or family conflict. Although the parents, caregivers, or teachers of these adolescents reported improvement after the intervention, the adolescents reported no effect.
Environmental quality or behavioural cognitions? Identifying variables that can be used to classify intended civic engagement against transportation noise exposure
Authors: Riedel Natalie , Mena Emily , Köckler Heike , Reineke Birgit , Peters Annette , Schwettmann Lars , Wolf Kathrin , Bolte Gabriele , Kraus Ute
Published: March 2023

The European Environmental Noise Directive opens the door for the public to participate in the development and review of noise action plans. Regarding health inequities related to environmental noise exposure, we aimed to identify determinants that influence residents' civic engagement
against transportation noise exposure. We defined four variable groups representing either environmental quality with indicators of (1) noise exposure and (2) environmental resources or behavioural cognitions with indicators related to (3) civic engagement and (4) generalised emotions and
cognitions. We used data collected from 3,743 participants in the population-based KORA study in the Augsburg region, Germany, and employed Conditional Inference Trees (CIT) to identify variable sets within these four groups that are most likely to classify civic engagement intentions. A final
CIT model encompassed all variables. Participants' social characteristics were included in each of our CIT models. Results suggest interactions between environmental quality (related to sound/atmosphere in the sleeping room) and income and between income and emotions (positive affectivity)
with respect to engagement intentions. When considered simultaneously, engagement-specific cognitions appeared as more relevant for engagement intentions than environmental quality. This finding indicates that noise action planning should take behavioural cognitions into account when designing
participation processes.
Association between aircraft noise levels and deprivation
Authors: Gong Xiangpu , Itzkowitz Nicole , Adams Kathryn , Jephcote Calvin , Blangiardo Marta , Gulliver John , Hansell Anna
Published: March 2023

There is limited evidence on socioeconomic distribution of noise exposure. Noise data (Lden, Laeq24, Lnight, Levening, and Lday) were available for London Heathrow airport for 2014-18. These were linked with different measures of deprivation: the Carstairs deprivation index (UK Census-derived),
fuel poverty rate and the avoidable death rate. Using Carstairs, mean noise levels were slightly higher in more deprived areas for most noise metrics, especially for Lnight (~2dB between least and most deprived Carstairs quintiles). However, Leve had slightly lower mean noise levels in the
most deprived quintile (~0.5dB difference). A clear pattern of higher mean noise levels with deprivation was seen using avoidable death rates (~4dB difference between lowest and highest quintile for Lnight). Conversely, mean noise levels were slightly lower in more deprived quintiles of fuel
poverty. Differences have been further quantified using a random-effects model, accounting for year. Heathrow airport is situated close to highly populated areas, some of which are very wealthy, so may not be representative of other airports. Results will be discussed with community groups
near Heathrow prior to Internoise 2022. As air transport increases post-pandemic, information on noise exposures as well as views from community groups can inform future airport policies
The impact of covid-19 restrictions on complaints of noise made to a local authority in Northern Ireland - a case study.
Authors: Shaw Lindsay , McCullough Paul
Published: March 2023

The covid pandemic with national lockdowns and restrictions profoundly affected people's lives in many ways including the experience of neighbourhood noise. While initial research indicated a rise in noise complaints at the start of restrictions in London during Spring 2020 (Tong, 2021),
a case study involving a single local authority in Northern Ireland indicates a different experience when the full 2020 year was analysed. Total number of complaints did not see a statistically significant increase when compared to the 5-year average. While there were increases in some categories
of noise of interest (loud music and parties, noise associated with anti-social behaviour), the comparison with the 5-year average did not show a statistically significant difference. The only category of noise that seen an increase of significance was noise complaints relating to retail.
This may be explained by increased demand in essential food retail as well as social distancing requirements, limitations to customers inside premises and changes made as the retail sector adapted. A wider study involving local authorities across Northern Ireland, the UK and across countries
that experienced lockdown measures may reveal a more accurate picture of the impact of neighbourhood noise experienced during the covid pandemic.
The EU Tyre Noise Label: The problem with measuring the noise level of only a few of all tyre variants
Authors: Sandberg Ulf , Mioduszewski Piotr
Published: March 2023

The STEER project, described in another Inter-Noise 2022 paper, has evaluated the performance of the noise label of the European tyre label. The major finding was that uncertainties of the tyre/road noise measurements were higher than should be accepted. One of the worst uncertainty
sources was found to be the common prac-tice to measure only some tyres of all sizes or variants within a tyre line, to save money. Generally, only the nois-iest tyre(s) is/are measured individually and other tyres in that line get the same level, which means that many if not most tyres are
labelled with too high noise levels. Then consumers cannot find the quietest tyres. STEER lacked resources to study this problem, but a Swedish project supported STEER in this respect, by making it pos-sible to measure noise of 53 tyres selected from tyre lines of three major tyre manufacturers.
The results showed that even though tyres in each line were labelled with the same noise level, in practice they differed up to 6 dB in noise emission. To avoid this very serious source of uncertainty, a special simplified test is suggested in order to be able to label tyres correctly without
too much extra effort.
A piezoelectric-nonreciprocal metamaterial with shaped eigenvectors using shunted piezo-networks
Authors: Baz Amr , Zhou Han
Published: March 2023

This paper presents a class of passive nonreciprocal metamaterials (PNMM) which are designed to control the flow of acoustic waves along a one-dimensional periodic acoustic duct. The proposed PNMM consists of a multi-cell array of acoustic cavities which are provided with piezoelectric
boundaries. These boundaries are connected to an optimally designed array of shunted inductive networks in order to spatially shape the eigenvectors of the array in such a manner that breaks the reciprocity of the acoustic duct. This approach distinguishes itself from other approaches where
non-reciprocities are controlled either actively or passively . A finite element model (FEM) is developed to analyze and predict the dynamic characteristics and behavior of the proposed PNMM for various shunting strategies and distributions of the networks. The predictions of the FEM are validated
experimentally using a five-cell array that is tested using the Transmission Loss and Impedance tube of ACUPRO (Sage Technologies). In the experimental model, the inductances are synthesized electronically to enable significant tailoring of the eigenvectors of the PNMM. The obtained results
indicate significant breaking of the non-reciprocity when the characteristics of the PNMM are determined during forward and backward wave propagations.
Study on the objective assessment of sleep disturbance due to environmental noise by wearable devices
Authors: Morinaga Makoto , Takara Chikashi , Sasazawa Yosiaki , Nakamura Hiroshi
Published: March 2023

Introducing noise standards or limits at night is necessary to prevent sleep disturbance due to environmental noise, such as transportation noise. In general, noise standards should be based on robust exposure-response relationships derived from many human response data, and subjective
evaluation obtained from large-scale socio-acoustic surveys can provide reliable scientific evidence. However, it is also necessary to investigate an easy method to collect objective data on sleep effects with little cost and effort. In the present study, we conducted a laboratory study and
investigated how accurately wearable devices can estimate the sleep stage. Participants wore a smartwatch installed with photoplethysmography (PPG), a portable ECG, and equipment of PSG simultaneously. As a result, the agreement of the sleep stage between the estimations by PPG and by PSG
was moderate (kappa coefficient = 0.47). Furthermore, we estimated the sleep stage by random forest using the data measured by the ECG, and it was highly agreed with the sleep stage by the PSG (kappa coefficient = 0.75). It is suggested that we could easily estimate the sleep stages such as
waking, REM, and non-REM with a certain level of accuracy by these wearable devices.
Interdisciplinary collaboration to identify challenges and opportunities in urban sound planning
Authors: Hernandez Josh , Burgess Marion , Prasad Deo
Published: March 2023

Urban sound planning aims to integrate soundscape approaches within existing planning frameworks to create sound environments which are conducive to health and wellbeing. It recognises that the best soundscape outcomes are achieved when acoustic environments are considered from the
outset of the urban planning and design process-and that this must be done with the interdisciplinary involvement of professionals from a range of fields. While the benefits of soundscape approaches in urban design have been demonstrated, positive soundscapes and public health outcomes have
been limited by a gap between theoretical understandings of sound as a manageable resource versus implementation in planning and the built environment. This is especially true in jurisdictions that lack quality-based environmental noise policies, as their regulatory actions are confined to
the mitigation of "noise" as a waste or pollutant. This paper explores the challenges for implementation of quality urban sound planning within the regulatory system of New South Wales, Australia. Barriers and opportunities for soundscape approaches in planning are discussed, based
on experiences from professionals in relevant domains and examples of successful soundscape and health outcomes in other jurisdictions.
Robust estimation of open aperture active control systems using virtual sensing
Authors: Lai Chung Kwan , Lai Chung Kwan , Tey Jing Sheng , Shi Dongyuan , Gan Woon-Seng
Published: March 2023

For active noise control systems in an open aperture application, virtual sensing system is often needed to overcome design constraint in terms of microphone placement. The virtual sensing system, however, make assumptions to the acoustical field and thus is highly sensitive to any
changes in the primary field. Taking the window aperture ANC application for example, incoming disturbance signals could impinge from multiple locations, altering the spatial correlation between the physical and virtual microphones. For instance, in the context of a high-rise apartment window,
aircraft noise would propagate downwards from the sky, whereas traffic noise propagate upward from the ground. This paper considers the estimation performance of the remote microphone technique, an example of a virtual sensing method, in an open aperture application when faced with changes
in the primary noise source. Additionally, this paper introduces a new method for estimating the spectral density due to multiple sources through the incoherent decomposition method. It has been shown experimentally that this algorithm is able to improve the nearfield estimation of the system.
Acoustic analysis of coupled loudspeakers for low frequency duct noise reflection
Authors: Li Shang , Zhao Xiaochen , Zhang Xinyu
Published: March 2023

The passive control of low-frequency duct noise remains a technical challenge. Inspired by the research of Wang and Huang [Investigation of a broadband duct noise control system inspired by the middle ear mechanism, Mech. Syst. Signal Process. 31 (2012) 284-297.], an electro-mechanical
coupling approach is introduced to solve this problem. The device consists of the main duct segment and multiple sets of connected loudspeakers, which functions as a side-by tube in traditional Herschel-Quincke (HQ) tube. The acoustic waves imposed on the upstream loudspeaker can be transmitted
to the other loudspeaker via the connecting circuit immediately, which represents a fast track when compared with the wave transmission via the fluid medium in the main duct. A periodic silencer array is developed to broaden the bandwidth and increase the magnitude of noise attenuation. Transfer
matrix method is adopted to investigate its acoustic performance. If proper parameters are selected, the proposed silencer can function effectively as wave reflector in low frequency range. The TL spectrum exhibits multiple peaks, which are mainly contributed by the HQ-tube-like resonance
and mechanical resonance of the loudspeaker itself.
Objective and subjective assessment of the speech intelligibility in rooms with an Active Acoustic Enhancement Systems
Authors: Blasinski Lukasz , Pastusiak Anna , Kocinski Jedrzej , Buszkiewicz Maciej
Published: March 2023

Speech Transmission Index (STI), apart from the Reverberation Time (RT), remains an important parameter used for the speech intelligibility assessment indoors. As the Active Acoustic Enhancement Systems (AAES) are getting more and more commonly used, it was verified how such systems
affect speech perception. In accordance with the 3382-1 and 3382-2 regulations, objective parameters were measured in two enclosures with the AAES. The RT values varied from 0.91 to 1.61 [s] for the hall in Mińsk Mazowiecki and from 0.75 to 1.52 [s] in Puławy. The STI values
varied from 0.57 to 0.64 in Mińsk Mazowiecki and 0.64 to 0.69 in Puławy. Despite the significant differences in the RT values, STI coefficients remained almost unchanged. The listening test was designed to verify if the subjectively assessed intelligibility would confirm the
objective measurements' results. 50-element nonsense words (logatome) lists were used for in-situ experiments and, in the second part, binaural laboratory arrangement. Both parts involved over 120 listeners. Three scenes were selected: without AAES and two different AAES setups. In summary,
subjective measurements' results were compared with the obtained STI, RT and Clarity (C50, C80) values to prove their importance in indoors speech intelligibility evaluation.
Building acoustic performance prediction - Feedback from Adivbois CLT building mockup
Authors: Guigou Carter Catherine , Balanant Nicolas , Kouyoumji Jean-Luc
Published: March 2023

The acoustic performance of a CLT based building mockup was investigated within the scope of AdivBois acoustic technical commission with the objective of defining wood building constructions fulfilling requirements. The CLT based building is a three floor construction, with four rooms
on each level. Measurements from junction characterization to air-borne and impact sound insulations have been performed. Furthermore, acoustic measurements have been performed before and after linings and floor coverings were implemented. Moreover, several acoustic teams have carried out
measurements in the building. This paper concentrates on the comparison between measured acoustic performance and the predicted one. Predictions are based on the EN ISO 12354-1 and -2 standards, using floor and wall acoustic performances measured in laboratory conditions. The effect of inserting
resilient layers in junctions, floor covering and receiving room size is discussed.
Tyre/road noise measurements on ISO tracks according to the UNECE Regulation 117
Authors: Berge Truls , Mioduszewski Piotr
Published: March 2023

Within the Polish-Norwegian research project ELANORE, a limited Round Robin Test has been performed on 3 ISO tracks in Northern Europe. The basic objective of the project is to improve the EU directive on labelling of tyres for noise and rolling resistance. This directive is based on
the measurement procedures proscribed in the UNECE Reg.117. On all test tracks the same car, test tyres and test equipment as well as personnel were used to minimize the measurement uncertainties. All tracks were built according to the specifications of ISO 10844:2014. Five sets of C1 test
tyres were used which consisted of two summer tyres, one all-season, one winter and one set of the SRTT tyres. Except for the SRTT tyres, the other 4 had labelled noise values from 67 to 74 dB. In addition to the test conditions specified in Reg.117, a modified test was also included, where
the load and inflation pressure were adjusted to better fit the test vehicle specification. Due to some adverse weather conditions at two of the test tracks, only a part of the test program was accomplished. The paper will present preliminary results from these measurements. A follow-up tests
are planned for 2022.
Experimental investigation of possible improvements of ISO 9614
Authors: Brezas Spyros , Wittstock Volker , Heisterkamp Fabian
Published: March 2023

Sound power level is the key quantity to describe the noise emission of products and is needed to reduce noise at work, at home, and in the environment, e.g. for promoting and selecting low noise products (Sell and Buy Quiet). Sound power determination based on sound intensity measurements
has advantages in non-ideal acoustic environments, e.g. indoors, but outside of acoustic test rooms, and is standardized in the ISO 9614 series. The current version of all three parts of ISO 9614 is their first edition. The advances of technology and knowledge indicate that the whole series
should be revised. The improvement of the sound intensity method was investigated regarding a number of aspects. The use of a single spacer up to frequencies, which are outside of the currently usable frequency range, was studied. The effect of electrical noise was investigated to extend the
applicability of the method to low noise sources. The discretization of the enveloping surface is discussed in relation to the accuracy grade of the measurements. The possibility to measure with more than one probes is also presented. The results indicate that there is the possibility for
a substantial improvement of the ISO 9614 series.
A Feasibility Study of Riblet for Aeroacoustics Applications
Authors: Muhammad Chioma , Chong Tze Pei
Published: March 2023

Although the use of finlet, serration or porous surface has been shown a good level of success in reducing aerofoil trailing-edge noise, they are largely incompatible to the otherwise streamlined aerofoil body. This paper is a feasibility study to investigate the riblet, which has so
far been quite successful as a drag-reducing device, for its potential to reduce the turbulent pressure sources that are important for aerofoil self-noise radiation. The completed results show that the riblet used in the current study can reduce the skin-friction coefficient, as well as the
turbulence-intensity in the boundary-layer profiles. In addition, the turbulence structures in the convective field can be dissipated more rapidly when crossing the riblet surface. It is also found that (1) the riblet produces a slight reduction of the wall-pressure power spectral density
level at the low and high frequency ranges, but experiences an increase at the mid frequency, (2) the riblet can reduce the lateral turbulence coherence length-scale across a large frequency range. The product of these two hydrodynamic sources represents an important mechanism for the radiation
of the trailing-edge self-noise, whose low and high frequency ranges are found to be sensitive to the riblet effect where reduction can occur.
Factors influencing tyre/road noise under torque
Authors: Hoever Carsten , Tsotras Achillefs , Pallas Marie-Agnès , Cesbron Julien
Published: March 2023

High levels of road traffic noise negatively impact public health in many parts of Europe, especially in cities. The introduction of electric mobility is often seen as one of the best measures to reduce noise exposition in urban environments. Compared to internal combustion engine vehicles
(ICEV), there is an increased importance of tyre/road noise for electric vehicles (EV) because of the reduced masking by the powertrain noise. This effect increases further under acceleration. Firstly, it is known that in most cases tyre/road noise is higher under torque than for free rolling.
Secondly, in situations which are characterized by increased driving torque, the lack of masking from powertrain noise for EVs is especially evident when compared to ICEVs. The aim of the LIFE E-VIA project is to reduce road traffic noise in cities by providing noise optimized road surfaces
and tyres for EVs. Because of the mentioned effects, not only constant speed driving needs to be considered but also accelerated driving. Consequently, within E-VIA noise measurements from an indoor drum and a test track have been used to investigate the impact of different tyre parameters
and operating conditions on the change of tyre/road noise under acceleration when compared to free rolling.
Using 3D road texture measurements for tyre/road noise modell
Authors: Baumgartner Bernhard , Wehr Reinhard , Fuchs Andreas , Ruisz Johannes
Published: March 2023

When investigating the generation of rolling noise, profound knowledge of the tyre/road interaction is inevitable. Research projects addressing the road surface influence on the noise generation are commonly based on standardized road surface texture parameters, e.g. mean profile depth
or spectral analysis of surface profiles. Such quantities are calculated from line texture measurements or equally sized parts of 3D-road surface samples. AIT has recently developed a high-speed continuous 3D texture scanner which provides heightened spatial information down to 60µm.
This allows the determination of a multitude of additional parameters of road surface geometries. In this paper, comparisons of line texture, statistical analyses of the variability of 3D texture parameters on real road sections, as well as basic statistical models to investigate correlations
between these parameters and coupled Close-Proximity Method (CPX) measurements will be described.
Acoustic echo modeling of people in acoustic arrays using LIDAR
Authors: Izquierdo Alberto , Del Val Lara , Villacorta Juan J.
Published: March 2023

In the field of human detection using acoustic arrays, the design of beamforming and detection algorithms is of vital importance. Evidently, the acoustic echo is directly dependent on the ergonomic characteristics of the people, as well as on the clothes they are wearing. Traditional
techniques use a large set of people to characterize the system and evaluate the detection and false alarm probabilities. This work proposes a different approach, where a reduced set of people is selected and a cluster of points with their ergonomic data is obtained by means of a 2D LIDAR.
From this data and using a classical reflection model, the signals that would be received in an acoustic array are calculated and, using conformation techniques, the 3D acoustic image is obtained. The work compares these synthesized acoustic images with real acoustic ones.
Perceptual acoustic space of tire noise
Authors: Marin-cudraz Thibaut , García Juan J. , Parizet Etienne
Published: March 2023

Road traffic noise accounts for the majority of perceived urban environmental noise and has important health consequences. The rolling noise of vehicle tires is a major contributor to perceived road noise. The tread pattern of light vehicle tires is already designed to minimize the
amplitude of the noise emitted, but this is not the case for heavy vehicles. The European LEON-T project aims to minimize the nuisance of heavy vehicle tires, especially noise. Prior to a study of the effects of tire noise on sleep, an experiment was conducted to determine the timbre parameters
of such noise. The data set used was obtained by a series of recordings on a standardized track using tires of various sizes. These stimuli were presented to headphones in a free sorting task. The presentation will show the results of this experiment, including the correlations between acoustic
parameters and perceptual space structure determined from the groups formed by the participants.
The forced sound transmission of finite periodic plates using a variational approach
Authors: Brunskog Jonas
Published: March 2023

Many engineering structures consist of plates being periodically stiffened or loaded. Examples can be wooden joist floors, dry walls with wooden or metal beams, or metamaterials for increased sound insulation. Even though some of these structures are well known and thoroughly studied
in the past, there lack prediction models that can handle both the finiteness and periodicity in a simple and accurate manner. In two previous attempts, the periodicity of the structure have been tried to be incorporated in a variational technique based on integral-differential equations of
the fluid loaded plate, based on [J. Brunskog, JASA 132, 1482-1493, 2012]. These attempts have not worked well: they show a poor fit with measured data. In this paper, this issue is investigated again, and a different tactics is used to incorporate the periodicity, using space harmonics. In
this way, the paper try to explain the previous misfit and improve the model.
Experimental Results of Double Near-filed Holography method for a commercial Product
Authors: Nagamatsu Masao
Published: March 2023

In my laboratory, the new localization method, Double Near-field Acoustic Holography (DNAH) method is being Developed. This method is developed to overcome the limit of acoustic holography methods, that the acoustic holography methods cannot measure low frequency noise precisely. In
former presentations, the numerical simulation results, and basic experimental results are reported. In these presentations, it is verified that the DNAH method has good resolution for low frequency sound sources. But they are carried out for simple sound source(s), simulated point source(s).
In this presentation, the experimental results for a commercial product will be presented. From these results, it is verified that the DNAH method has good resolution for low frequency noise of a commercial product between 10Hz and 200Hz, and the DNAH method has enough resolution for low frequency
sound localization.
Measuring low noise level in dwellings
Authors: Jessen Birger
Published: March 2023

DS 490:2018 "Akustik - Lydklassifikation af boliger", translated to "Acoustics - Acoustic Classification of Dwellings" relates to many acoustical parameters, and two of them "Noise from ventilation" and "Reverberation times" are now being tested
in real life in the Danish "Voluntary sustainability classification".(Called FBK) Danish building regulation state a sound level limit in dwellings from all kinds of technical systems at 30 dB(A), equal to the Acoustical class C, comparable with the limit in several countries. Research
shows that 30 dB(A) does not ensure acoustic satisfying comfort for most people. The FBK have chosen to lower the noise limit to 25 dB(A), equal to acoustical class B. We need to improve the ventilation systems in order to reach such lower level of sound emission, and to be able to measure
it implemented in dwellings. The paper describes some methods and in situ experience fighting background noise problems caused by activities around and in the dwelling, as well as in the measurement systems. Special analyses and editing of recordings based on listening and pragmatic judgements
are relevant. The goal is: Measure and document low noise without a cost in time and money being a barrier for lower noise levels in dwellings.
E-Transactions in Digital Era
Authors:   Departemen Manajemen, Universitas Komputer Indonesia, Indonesia, R D Santy R D , Hutomo G H
Published: March 2023

The purpose of this research is to help marketplace providers utilize E-commerce to improve their business. The method used in this study is a survey and literature study from research that has been done before. The results show that the role of the e-commerce market in online business transactions is useful to attract buyers. Starting from product marketing through media such as social media, websites, and advertisements. The role of E-commerce marketplace in online business transactions provides many benefits such as fast access to transactions, availability of goods, and ease of accessing the site
Digital Brand as Promotional Strategies
Authors:   Departemen Manajemen, Universitas Komputer Indonesia, Indonesia, Santy R D , Anwar D D ,   Departemen Ilmu Komunikasi, Universitas Komputer Indonesia, Indonesia
Published: March 2023

The purpose of this study is to explain the role of digital brands in conveying messages to consumers about the "value" of a product as an attractive promotional tool for consumers.This research used a qualitative method with a descriptive approach that explains the promotion strategy and brand engagement through the web series that became a new content marketing campaign. The results of this study are the increased proximity between ,customers and brand as well as the increased understanding brand which leads to brand, awareness because attractive promotional strategies can attract the, attention of consumers. The use of web series to build engagement with customers also has its own added value, where the web series can also be used as a product campaign such as Ax Indonesia, which released a Web Series Axelerate the series: Kostan AX/3 that is in conjunction with the launch of their new product, Pomade, and Facial Wash. This study concludes that the approach to consumers must be adjusted to the characteristics of consumers themselves so that messages can be conveyed more effectively and on target.
Digital Marketing in Industrial Revolution 4.0
Authors:   Departemen Manajemen, Universitas Komputer Indonesia, Indonesia, Soegoto Eddy Soeryanto , Raihan Naufal ,   Departemen Ilmu Komunikasi, Universitas Komputer Indonesia, Indonesia
Published: March 2023

The purpose of this research is to build the brand awareness around millennial people. This research used descriptive method to see the role of digital marketing and the brand awareness in fashion industry. In this era, digital of marketing is a strategy to increase consumer awareness for fashion brand, especially a boy fashion. As there are lot of internet user, it can increase brand awareness in a product at this digital era.
Dashboard Information System for New Entrepreneur
Authors: Setiawan Eko Budi , Setiyadi Angga
Published: March 2023

The more new entrepreneurs are created will have an impact on increasing the growth of the creative industry. The uneven growth of new entrepreneurs in a region will make it difficult for aspiring entrepreneurs to start a business. This research aims to display data on the distribution of entrepreneurs in an area to make it easier to determine the type of business that is most suitable to start. This research was conducted using a web-based application to display entrepreneurs data distribution in the Bandung Raya area. The data displayed was obtained from Training Center for Cooperatives and MSMEs of the Office of Cooperatives and Small Businesses of West Java Province. The results of functional testing that were carried out showed that all functions could display information as expected. The research results can have an impact, namely making it easier to understand information so that information can be displayed in the form of graphs, diagrams, and statistics. The resulting dashboard information system can also accelerate prospective entrepreneurs to know and understand the situation and condition of an area that is a plan for creating a new business, be it a business that has never existed in the area or existing business.
2021 Myanmar Political Crisis : Opportunity and Challenge for Indonesia Sectoral Leadership in ASEAN
Authors:   Departement of International Relations, Univ. Jenderal A. Yani, Indonesia, Rachmat Angga Nurdin , Benarrivo Renaldo ,   Departement of International Relations, Univ. Jenderal A. Yani, Indonesia, Kautsar Reyghita Fay ,   Departement of International Relations, Univ. Jenderal A. Yani, Indonesia
Published: March 2023

The purpose of this research is to finds the opportunity and challenge for Indonesia as sectoral leadership role in political-security in address 2021 Myanmar political crises. This research used qualitative methods which data collection by literature studies. Research found that the opportunity for Indonesia to coping with 2021 Myanmar political crises came from its free-active foreign policy, experience of democracy transition and diplomacy capability in ASEAN. But at the same time Indonesia has faced the obstacle to coping with it from the both external and internal such as ASEAN non-interference doctrine, the resistance from Myanmar people and inconsistence of Indonesia domestic commitment toward Human Right and Introduction
The Effects of Leaders’ Professionalism towards Employees’ Job Satisfaction
Authors:   Departemen Magister Manajemen, Universitas Komputer Indonesia, Indonesia, Harsyawardhana A K , Wahdiniwaty R ,   Departemen Magister Manajemen, Universitas Komputer Indonesia , Indonesia
Published: March 2023

When running an organization, its leader is supposed to be a role model for their employees, as no employee would like to follow an organization’s leader who acts unaccordingly. This research’s goals are to see the effects of leaders’ professionalism towards employees’ job satisfaction and its relation towards each other. The experimental method in this research uses field experiment, in which a firm’s director’s attitude and its employees’ job satisfaction are surveyed. The subject of this research is a laboratory equipment distribution company located in Bandung, Indonesia. This research uses quantitative method with data sourcing from direct observation, data gathering from research’s subjects, and previous researches with similar topics. This research resulted in knowing of improvement potential in the field of management, operations, and relation between co-workers through director’s attitude. By using statistic application and data processing, this research shows the relations between leaders’ professionalism attitude and employees’ job satisfaction. This research shows a positive yet non-significant correlation between leaders’ professionalism and employees’ job satisfaction
Analysis of Correlations Self Efficacy and Entrepreneurship Intention
Authors:   Departemen Manajemen, Universitas Komputer Indonesia, Indonesia, Handayani T
Published: March 2023

The purpose of this study was to see how the Self-Efficacy possessed by Students Class 2017 of Managemet Major Unikom is linked to Entrepreneurship Intention The research methods used are descriptive and verificative. The sample in this study amounted to 61 out of the population of 156 students class of the 2017 . The technique of determining samples in the form of proporsional random sampling based on classes by spreading questionnaires, so that it is expected to obtain the desired research results.The Research of results through Descriptive Analysis show that Self-Efficacy has a total score of 64.41% with sufficient criteria to have self-efficacy with the lowest indicator of confidence for success by 60%, and the highest indicator of confidence has the ability to fulfill tasks by 70%. As for the variable Entrepreneurship Interest resulted in a Total Score of 60% with a category of quite Interested for Entrepreneurship, with the lowest indicator of Entrepreneurial Desire at 48.52%, and the highest Indicator of Entrepreneurship With a Total Score of 71.48%. Result of research Verificative analysis correlation that the relationship of Self-Efficacy with Entrepreneurship Interests in Student Class 2017 of Management Major was able to score by 44.1% with the relationship category not too strong. This shows that respondents feel less confident to open a business and to achieve future success. You can only be an employee, not an entrepreneur. The impact of the results of this study requires the provision of continuous motivation to create a sense of confidence in students to become an entrepreneur.
DYNAMIC MODEL OF A PLATFORM WITH 6 DEGREES OF MOBILITY
Authors: Hurtasenko A. , Chuev K. , Rybak L. , Skitova V.
Published: March 2023

This article discusses and analyzes mechanisms based on the principles of parallel kinematics, designed to perform various technological actions, with the movement of the executive body along complex spatial trajectories. Mechanisms with parallel structures have wide possibilities for solving various problems of application of equipment and technologies. Promising are the tasks associated with the use of mobile bases in various simulators to gain skills in controlling equipment (aircraft, cars, specialized military equipment). To conduct research on kinematic and dynamic characteristics, a digital layout of the platform has been developed – a parameterized 3D model in a CAD system. The platform represents a system with six degrees of mobility, which are implemented on the basis of a mechanism with a parallel structure. A description of a dynamic simulation model with six degrees of mobility developed using the MSC Adams software environment is given. The model is intended for research at the stage of design work in the development of simulators of various vehicles. The developed dynamic model was tested in order to implement a methodology for conducting research on the kinematic and dynamic characteristics of the platform based on simulation modeling. The results determining the capabilities of the model for determining the dynamic and force parameters in individual elements of the platform at the specified geometric parameters of the platform design are presented. The methodology of studying the digital layout of the platform by simulation modeling consisted in the execution of the accepted trajectories by the model, taking into account the technical characteristics of the actuators. At the same time, certain dynamic indicators were recorded and processed. As a result, graphs of changes in velocities and accelerations of the center of mass, as well as force characteristics (the sum of forces applied to the body in the hinge) when performing the corresponding trajectories are constructed.
THE EFFECT OF TEMPERATURE-REDUCING ADDITIVES BASED ON SYNTHETIC WAXES ON THE PROPERTIES OF BITUMEN
Authors: Yadykina V. , Mihaylova O.
Published: March 2023

Obtaining warm asphalt concrete mixes is an urgent task in the road industry, as it allows solving environmental, technological and economic problems of preparing and laying asphalt concrete. One of such technologies is the production of asphalt concrete using organic additives based on synthetic waxes, which until recently were presented on the market exclusively with imported products. In the current political and economic situation, the relevance of the development and implementation of domestic analogues of wax temperature-lowering additives becomes an important task. The article studies the effect of additives based on synthetic waxes on such physico-chemical properties of bitumen binder as penetration, softening temperature, extensibility, fragility temperature by Fraas, adhesion to crushed stone. The indicators and comparative analysis of the properties of binders modified by the domestic complex additive Viskodor PV-2 and imported organic additives Licomont BS-100 and Sasobit are given. It was revealed that the new domestic complex additive has advantages over imported wax additives: it allows to lower the brittleness temperature of the binder, increase the softening temperature, the adhesion of bitumen to mineral materials with a smaller decrease in penetration. Rational concentrations of the use of the additive Viskodor PV-2 have been established.