bluuebunny/crossref_metadata_2025 huggingface dataset:
Vaccination of Zoo Birds against West Nile Virus—A Field Study
Authors: Bergmann Felicitas , Fischer Dominik , Fischer Luisa , Maisch Heike , Risch Tina , Dreyer Saskia , Sadeghi Balal , Geelhaar Dietmar , Grund Lisa , Merz Sabine , Groschup Martin H. , Ziegler Ute
Published: March 2023

West Nile virus (WNV) is known to cause disease and death in humans and various animals worldwide. WNV has circulated in Germany since 2018. In 2020, four birds tested positive for the WNV genome at Zoopark Erfurt (Thuringia). Moreover, virus neutralization assays detected neutralizing antibodies (nAb) against WNV in 28 birds. In addition, nAb against WNV and Usutu virus (USUV) were found in 14 birds. To protect valuable animals and to reduce the risk of viral transmission from birds to humans, we performed a field study on WNV vaccination at the zoo. To conduct the study, 61 birds from the zoo were categorized into three groups and subjected to a vaccination regimen, where each bird received either 1.0 mL, 0.5 mL, or 0.3 mL of a commercial inactivated WNV vaccine three times. The vaccinations were administered at three-week intervals, or as per modified vaccination schedules. Furthermore, 52 birds served as non-vaccinated controls. Adverse vaccination reactions were absent. The greatest increase in nAb titres was observed in birds that received 1.0 mL of vaccine. However, pre-existing antibodies to WNV and USUV appeared to have a major effect on antibody development in all groups and in all bird species, whereas sex and age had no effect. After vaccination, no death was detected in vaccinated birds for more than 1 year.
T-Cell Response and Antibody Production Induced by the COVID-19 Booster Vaccine in Japanese Chronic Kidney Disease Patients Treated with Hemodialysis
Authors: Yoshifuji Ayumi , Toda Masataro , Ryuzaki Munekazu , Oyama Emi , Kikuchi Kan , Kawai Toru , Sakai Ken , Koinuma Masayoshi , Katayama Kazuhiko , Yokoyama Takashi , Uehara Yuki , Ohmagari Norio , Kanno Yoshihiko , Kon Hirofumi , Shinoda Toshio , Takano Yaoko , Tanaka Junko , Hora Kazuhiko , Nakazawa Yasushi , Hasegawa Naoki , Hanafusa Norio , Hinoshita Fumihiko , Morikane Keita , Wakino Shu , Nakamoto Hidetomo , Takemoto Yoshiaki
Published: March 2023

Humoral and cellular responses are critical in understanding immune responses to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination. Here, we evaluated these responses in hemodialysis (HD) patients after the booster vaccination. SARS-CoV-2 immunoglobulin (IgG) levels, neutralizing antibody titers, and the T-SPOT®.COVID test (T-SPOT) were measured prior to, three weeks after, and three months after the booster administration. The HD group had significantly higher SARS-CoV-2 IgG levels and neutralizing antibody titers against the original strain at three weeks and three months after the booster vaccination compared to the control group, albeit the HD group had lower SARS-CoV-2 IgG levels and neutralizing antibody titers before the booster administration. Moreover, the HD group had significantly higher T-SPOT levels at all three time points compared to the control group. The HD group also had significantly higher local and systemic adverse reaction rates than the control group. By booster vaccination, HD patients could acquire more effective SARS-CoV-2-specific humoral and cellular immunity than the control group.
The Development of Diagnostic and Vaccine Strategies for Early Detection and Control of Human Brucellosis, Particularly in Endemic Areas
Authors: Elbehiry Ayman , Aldubaib Musaad , Marzouk Eman , Abalkhail Adil , Almuzaini Abdulaziz M. , Rawway Mohammed , Alghamdi Ali , Alqarni Abdullah , Aldawsari Mohammed , Draz Abdelmaged
Published: March 2023

Brucellosis is considered one of the most serious zoonotic diseases worldwide. This disease affects both human and animal health, in addition to being one of the most widespread zoonotic illnesses in the Middle East and Northern Africa. Human brucellosis generally presents in a diverse and non-specific manner, making laboratory confirmation of the diagnosis critical to the patient’s recovery. A coordinated strategy for diagnosing and controlling brucellosis throughout the Middle East is required, as this disease cannot be known to occur without reliable microbiological, molecular, and epidemiological evidence. Consequently, the current review focuses on the current and emerging microbiological diagnostic tools for the early detection and control of human brucellosis. Laboratory assays such as culturing, serology, and molecular analysis can frequently be used to diagnose brucellosis. Although serological markers and nucleic acid amplification techniques are extremely sensitive, and extensive experience has been gained with these techniques in the laboratory diagnosis of brucellosis, a culture is still considered to be the “gold standard” due to the importance of this aspect of public health and clinical care. In endemic regions, however, serological tests remain the primary method of diagnosis due to their low cost, user-friendliness, and strong ability to provide a negative prediction, so they are commonly used. A nucleic acid amplification assay, which is highly sensitive, specific, and safe, is capable of enabling rapid disease diagnosis. Patients who have reportedly fully healed may continue to have positive molecular test results for a long time. Therefore, cultures and serological methods will continue to be the main tools for diagnosing and following up on human brucellosis for as long as no commercial tests or studies demonstrate adequate interlaboratory reproducibility. As there is no approved vaccine that prevents human brucellosis, vaccination-based control of animal brucellosis has become an important part of the management of human brucellosis. Over the past few decades, several studies have been conducted to develop Brucella vaccines, but the problem of controlling brucellosis in both humans and animals remains challenging. Therefore, this review also aims to present an updated overview of the different types of brucellosis vaccines that are currently available.
Indirect Dispersion of SARS-CoV-2 Live-Attenuated Vaccine and Its Contribution to Herd Immunity
Authors: Pacheco-García Ursino , Serafín-López Jeanet
Published: March 2023

It has been 34 months since the beginning of the SARS-CoV-2 coronavirus pandemic, which causes the COVID-19 disease. In several countries, immunization has reached a proportion near what is required to reach herd immunity. Nevertheless, infections and re-infections have been observed even in vaccinated persons. That is because protection conferred by vaccines is not entirely effective against new virus variants. It is unknown how often booster vaccines will be necessary to maintain a good level of protective immunity. Furthermore, many individuals refuse vaccination, and in developing countries, a large proportion of the population has not yet been vaccinated. Some live-attenuated vaccines against SARS-CoV-2 are being developed. Here, we analyze the indirect dispersion of a live-attenuated virus from vaccinated individuals to their contacts and the contribution that this phenomenon could have to reaching Herd Immunity.
RT-LAMP as Diagnostic Tool for Influenza—A Virus Detection in Swine
Authors: Storms Suzanna M. , Shisler Joanna , Nguyen Thanh H. , Zuckermann Federico A. , Lowe James F.
Published: March 2023

Point-of-care diagnostic technologies are becoming more widely available for production species. Here, we describe the application of reverse transcription loop-mediated isothermal amplification (RT-LAMP) to detect the matrix (M) gene of influenza A virus in swine (IAV-S). M-specific LAMP primers were designed based on M gene sequences from IAV-S isolated in the USA between 2017 and 2020. The LAMP assay was incubated at 65 °C for 30 min, with the fluorescent signal read every 20 s. The assay’s limit of detection (LOD) was 20 M gene copies for direct LAMP of the matrix gene standard, and 100 M gene copies when using spiked extraction kits. The LOD was 1000 M genes when using cell culture samples. Detection in clinical samples showed a sensitivity of 94.3% and a specificity of 94.9%. These results show that the influenza M gene RT-LAMP assay can detect the presence of IAV in research laboratory conditions. With the appropriate fluorescent reader and heat block, the assay could be quickly validated as a low-cost, rapid, IAV-S screening tool for use on farms or in clinical diagnostic labs.
The Immunoprotection of OmpH Gene Deletion Mutation of Pasteurella multocida on Hemorrhagic Sepsis in Qinghai Yak
Authors: Jia Jianlei , Zhao Meng , Ma Kairu , Zhang Hongjian , Gui Linsheng , Sun Huzhi , Ren Huiying , Okabayashi Tamaki , Zhao Jing
Published: March 2023

OmpH is among the most important virulence factors of Pasteurella multocida, which mediates septicemia in yaks (Bos grunniens I) after infection with the bacteria. In the present study, yaks were infected with wild-type (WT) (P0910) and OmpH-deficient (ΔOmpH) P. multocida strains. The mutant strain was generated through the reverse genetic operation system of pathogens and proteomics technology. The live-cell bacterial count and clinical manifestations of P. multocida infection in Qinghai yak tissues (thymus, lung, spleen, lymph node, liver, kidney, and heart) were analyzed. The expression of differential proteins in the yak spleen under different treatments was analyzed using the marker-free method. We found that compared with the mutant strain, the titer of wild-type strains was significantly higher in tissues. Additionally, compared with other organs, the bacteria titer was significantly higher in the spleen. Compared with the WT p0910 strain, the mutant strain generated milder pathological changes in the tissues of yak. Proteomics analysis revealed that 57 of the 773 proteins expressed in P. multocida were significantly differentially expressed between the ΔOmpH and P0910 groups. Of the 57, 14 were over-expressed, whereas 43 were under-expressed. The differentially expressed proteins in the ΔompH group regulated the ABC transporter (ATP-powered translocation of many substrates across membranes) system, the two-component system, RNA degradation, RNA transcription, glycolysis/gluconeogenesis, biosynthesis of ubiquinone and other terpenoid-quinones, oxidative phosphorylation (citrate cycle) as well as fructose and mannose metabolism. The relationship among 54 significantly regulated proteins was analyzed using STRING. We found that WT P0910 and ΔOmpH of P. multocida infection activated the expression of ropE, HSPBP1, FERH, ATP10A, ABCA13, RRP7A, IL-10, IFN-γ, IL-17A, EGFR, and dnaJ. Overall, deletion of the OmpH gene weakened the virulence but maintained the immunogenicity of P. multocida in yak. The findings of this study provide a strong foundation for the pathogenesis of P. multocida and the management of related septicemia in yaks.
Trophic Assessment of an Artificial Kelp Eisenia bicyclis Bed Off the Eastern Coast of Korea Based on Stable Isotope Analyses
Authors: Park Tae Hee , Jang Jae-Bin , Chun Chan-Kil , Lee Youngkweon , Han Kyu-Sam , Yang Su-Jeong , Park Hyun Je
Published: March 2023

Effective trophic assessment of restoration success after the creation of an artificial habitat is essential for ecological management. In this study, to evaluate the ecological trophic function of restored kelp beds of artificial macroalgal reefs (AMRs) attached with the kelp species Eisenia bicyclis, we compared carbon and nitrogen stable isotope ratios of organic matter sources and macrobenthic consumers and isotopic indices of functional feeding groups between artificial and reference (natural bed and barren ground, respectively) habitats. There were no significant differences in isotopic values of consumer feeding groups (except for carnivores) and their potential food sources between the artificial and natural sites, suggesting that resource diversity and resource use by consumers was similar across all sites. The isotopic data also exhibited similar or relatively higher trophic niches of feeding groups at the artificial site compared to those at the natural site, indicating that the artificial kelp bed can play important roles in similar ecological functions and services as a natural counterpart. In addition, the present study revealed that the isotopic ranges and niche indices of feeding groups were significantly wider at the artificial and natural kelp beds compared to those at the barren ground, suggesting the trophic importance of macroalgal-derived organic matter to consumer nutrition in coastal ecosystems. Overall, our results support the conclusion that the creation of an Eisenia bicyclis kelp bed by the AMRs may lead to the restoration success of the macroalgae habitat through the recovery of the ecological function of a natural food web structure.
Characteristics of Large-Scale Coherent Structures on Irregularly Arranged Rough-Bed Open-Channel Flows
Authors: Wang Yongqiang , Zhang Peng , Yang Shengfa , Hu Chunhong , Jin Jianling , Zhang Rangang
Published: March 2023

Large-scale coherent structures (LSCSs) in rough-bed open-channel flow (OCF) are significant in turbulence research. A recent breakthrough is the bimodal feature of LSCSs on regular rough-bed OCF (i.e., LSCSs exhibit two typical motions: large-scale motions (LSMs) and very-large-scale motions (VLSMs)). However, the presence and characteristics of LSMs and VLSMs in irregularly arranged rough-bed OCF remain unclear. Thus, in this study, high-precision indoor flume experiments were performed under typical irregularly arranged rough-bed conditions, and time-resolved particle image velocimetry was used for velocity measurements. Statistical quantities of velocity fluctuations revealed that the friction Reynolds number and roughness exerted a certain modulation on the velocity fluctuating properties. The spectra of velocity fluctuations provided direct and statistical evidence for the presence of LSMs and VLSMs in irregularly arranged rough-bed OCF. VLSMs contributed more than 60% of the streamwise turbulent kinetic energy and 40% of the Reynolds shear stress in the outer region of the irregularly arranged rough-bed OCF, which was slightly higher than that in the smooth-bed or regular rough-bed OCF scenarios. No apparent dependence of the wavelength of VLSMs on the flow submergence (H/d50) was observed in the present irregularly arranged rough-bed OCF, which is in contrast to that reported for regular rough-bed OCF. Furthermore, the relationship between the peak wavelength of VLSMs and the aspect ratio did not strictly follow a linear increase, in contrast to that documented in the literature.
Exploring Factors Affecting People’s Willingness to Use a Voice-Based In-Car Assistant in Electric Cars: An Empirical Study
Authors: Liu Jing , Wan Fucheng , Zou Jinzhi , Zhang Jiaqi
Published: March 2023

Voice-based digital assistants are growing in popularity and have been acknowledged as a crucial part of in-car interaction. Currently, academic attention is being paid to various voice assistant scenarios. However, sparse literature focuses on the adoption of voice assistants within the in-vehicle context. The objective of this paper is to examine key factors influencing people’s willingness to use voice assistance in electric cars. First, eight general variables were identified based on the literature review, as well as four demographic variables. These factors were then integrated to construct a hypothetical research model. After that, we carried out an empirical study to examine the structural relationships in the model based on the questionnaire survey results (N = 427). The hypothesis testing results indicated that most path relationships among variables were validated. Finally, we discussed the research findings and developed corresponding design strategies to enhance user acceptance towards in-car voice assistants, both from designers’ and car enterprises’ viewpoints. This article offers valuable theoretical and practical implications for the development of such technologies.
The relationship between the facial type and the state of chewing muscles in children with cerebral palsy
Authors: Makedonova Yu. A. , Vorobev A. A. , Pavlova-Adamovich A. G. , Osyko A. N. , Poroshin A. V.
Published: March 2023

Relevance. The modern development of practical dentistry and the emergence of new techniques and methods of diagnosis and treatment determine the necessity and expediency of studying the anatomical features of the head, skull, structure of dental arches, and dental segments in general. Knowledge of the patterns and characteristics of the skull structure and their relationship with morphometric, clinical and functional parameters will allow the diagnosis of various forms of maxillofacial disorders based on comorbidity.

Materials and methods. The study examined 30 children aged 6 to 12 y.o. to determine the relationship between the type of face and the state of the chewing muscles in children with cerebral palsy. Maxillofacial anthropometric measurements were made, e.g., the bitragional length (t-t) and the distance between the tragion and subnasale landmarks (t-sn); the gnathic index of the face was calculated, and the mouth opening range was measured. The surface electromyography determined the mean biopotential amplitude of the right and left proper masticatory and temporal muscles using the "bruxism" test.

Results. The anthropometric measurement data indicate the prevalence of a brachygnathic facial type in children with cerebral palsy. The electromyographic study data evidence spasticity of the masticatory muscles.

Conclusion. The obtained data indicate functional overload of the chewing muscles. Masticatory muscles' hypertonicity determined the brachygnathic facial type in children with cerebral palsy.
Assessment of Drone Noise Within Urban Soundscapes
Authors: Ramos Romero Carlos , Nicholls Rory , Torija Antonio J
Published: March 2023

Drones have the potential to be implemented in the infrastructure of metropolitan areas to provide services to the public such as delivery, maintenance, and even blue light services. The scope for drone capability is large, but this comes with the risk of introducing a dominant, unpleasant
noise source above urban areas, with potentially adverse health effects. This paper describes research which investigates whether, and to what extent, different urban soundscapes mask noise from drone operations, and using statistical analysis methods such as principal component analysis interrogates
which frequency ranges of drone noise should be appropriately masked to reduce perceived annoyance. A subjective experiment was carried out, where participants gave response values to a comprehensive set of drone sounds embedded into differing urban soundscapes. Response values included perceived
annoyance, perceived loudness, drone noise dominance and soundscape pleasantness. Critical-band rate specific sound quality metrics were then calculated for the soundscapes with and without each drone sound present, and the metric value differences were used in principle component analysis,
with the results suggesting which specific sound quality metrics contribute significantly to the response values.
Association between hearing threshold and low-frequency walking sounds on concrete floors
Authors: Kylliäinen Mikko , Lietzén Jesse
Published: March 2023

The sufficient frequency range to be measured for the rating of impact sound insulation of floors has been a relevant research question since the 1960's when the lower limit of the measured frequency range was set at 100 Hz. It has been long recognized that walking sounds at frequencies
lower than 100 Hz might have a significant effect on the experienced impact sound insulation of floors. Recently, it has been suggested that the frequency range to be measured for the rating of impact sound insulation should be enlarged down to 20 Hz. This suggestion is based on studies concerning
wooden buildings. It is not known whether such low-frequency walking sounds are generated by walking on concrete floors. The purpose of this preliminary study was to produce sound spectra of several living impact sound sources. The spectra of different sound sources were measured in a laboratory.
The results show that, in the case of concrete floors, such low-frequency living sound spectra that would exceed the hearing threshold do not exist, or they are at least uncommon.
Analysis of community departure noise exposure variation using airport noise monitor networks and operational ADS-B data
Authors: Hansman R John , Huynh Jacqueline , Hansman R. John
Published: March 2023

Advanced operational flight procedures have been proposed to reduce the impact of aircraft operations on community noise. Recent work has led to the development of noise abatement procedures like the delayed-deceleration approach for arrivals. Causes of variation in airport noise monitor
network measurements due to departures remain an important source of uncertainty in the development of departure noise abatement procedures. Understanding this variation, found to be up to 20 dB at individual monitors for multiple departures, can be accomplished by analyzing aggregate departure
noise and flight procedures so statistically-significant factors that correlate with measured noise can be isolated. This paper aims to identify these factors. Operational flights at Seattle-Tacoma International Airport conducted in March and August of 2019 are examined using a framework that
includes ADS-B data from the OpenSky Network, a force balance kinematics model to model aircraft performance, and the Seattle-Tacoma International Airport noise monitor network. Variation in measured departure noise throughout the entire monitoring network is examined as a function of aircraft
weight, thrust, velocity, specific energy, and flight path angle. Variables that are found to correlate with increased noise are isolated and can be used to inform the development of future departure noise abatement procedures.
Differences between measured and simulated room impulse responses
Authors: Aspöck Lukas , Vorländer Michael
Published: March 2023

Simulation models based on geometrical acoustics mostly do not immediately deliver a simulated room impulse response, but intermediate results such as an energy histogram or an energy decay curve. At this point, further models are required to generate a room impulse response of the
simulated environment, which are essential for the process of auralization. While for various simulated scenarios, the application of a reflection model based on a basic theory is sufficient, detailed comparisons of simulated and measured room impulse responses reveal differences which are
attributed to the lack of diffuse reflections in the applied reflection model. These deviations can also substantially affect derived room acoustic parameters. This work presents and explains the shortcomings and discusses potential improvements to be considered in the simulation process.
Noise and Pavement Rehabilitation Using Chip Seal Surfaces
Authors: Donavan Paul , Janello Carrie , Lodico Dana
Published: March 2023

In the United States, increasing number of local and state highway agencies are using chip seals for highway pavement rehabilitation due to their relatively low cost and simplicity of application. These surfaces can significantly increase both exterior traffic noise levels and interior
noise for vehicle occupants. Recent studies have quantified these effects using pass-by and interior noise and on-board sound intensity (OBSI) measurements. In order to minimize these effects, the California Department of Transportation (Caltrans) has conducted research on different chip seal
pavement designs near the City of Bishop, California. Previous measurements of chip seal pavement have indicated an average OBSI level of 106.2 dBA with a range of ±2 dB. The five quietest test sections at Bishop produced an average level of 101.8 dB with a range of ±0.6 dB.
In this presentation, the previous pass-by and interior noise and OBSI measurements are provided along with the comparison of OBSI data to that measured at the Bishop sites. The performance and design information on the Bishop sites are also provided.
Applying the remote microphone method in the filtered error least mean squares algorithm
Authors: Fu Yujie , Liu Chunyu , Shi Chuang
Published: March 2023

An active noise control (ANC) system generates an anti-noise wave to reduce the noise level at a control point, where the error microphone is conventionally placed. Virtual sensing techniques are developed for situations when the error microphone cannot be permanently placed at the
control point. The remote microphone (RM) method is one of the most straightforward virtual sensing methods. Previous studies have demonstrated that the performance of the RM method is influenced by the causality between the physical and virtual error microphones, which can be resolved by
introducing a delayed version of the virtual error signal. So far, the RM method has mainly been examined with the filtered reference least mean squares (FxLMS) algorithm. This paper applies the RM method in the filtered error least mean squares (FeLMS) algorithm. The FeLMS algorithm introduces
an adjoint filter to reduce the computational complexity of the ANC system. The delay incurred by the adjoint filter is just right to implement the delayed virtual error signal of the RM method.
Relationship between exposure and listening disturbance response due to transportation noise in Japan
Authors: Yokoshima Shigenori , Morinaga Makoto , Tsujimura Sohei , Shimoyama Koji , Morihara Takashi , Yano Takashi
Published: March 2023

In the previous study, we performed a secondary analysis using micro-data and established the Japanese relationships between sound pressure level from night-time (Lnight) and the percentage of highly sleep disturbed people (%HSD) for the following transportation noises: road traffic,
conventional railway and Shinkansen railway noises. Adding the datasets associated with civil and military aircraft noises, we successively established the Japanese representative relationships between day-evening-night sound pressure level (Lden) and the prevalence of highly annoyed people
(%HA) due to transportation noise in Japan. This paper newly focuses on listening disturbance, which is one of psychological effects of noise. Thirty-five datasets, which were provided by Socio-Acoustic Survey Data Archive and derived from the other recent surveys conducted in Japan, were
accumulated for the analysis. All the datasets include the following micro-data: demographic factors, exposure, and reaction to disturbance in listening to telephone, television, or radio. This paper defines the percentage of highly listening disturbed people (%HLD) using a 72% cut-off point.
Based on the discussion about the difference in %HLD depending on the question wording, the number of scale points, demographic factor, and housing type, we establish the relationship between Lden and %HLD by transportation noise.
Model test analysis of control effect of building foundation elastic pad on subway environmental vibration
Authors: Wu Yubin , Song Ruixiang , Wu Yanan , He Lei , Liu Bideng , Wu Qiong , WU Dan , Zhang Jing
Published: March 2023

Building foundation elastic pad is one of the important measures for subway vibration control. In order to understand the subway vibration control effect of elastic pad on superstructure, two identical concrete test blocks were poured on site near a subway line. Taking the real subway
vibration load as the input source strength, the vibration isolation effect of elastic pad on upper concrete mass block was compared and analyzed; At the same time, the influence of the backfill around the underground foundation of the building on the vibration isolation effect is simulated
and analyzed. The backfill has a non negligible restraint effect on the building, improves the vertical natural frequency of the "building elastic pad" system, and then reduces the vibration isolation effect of the elastic pad. Therefore, it is very necessary to lay the elastic pad
on the side wall around the building to reduce the lateral restraint effect of the backfill.
Genetic algorithm for the optimization of damping material
Authors: Chacko Jain , Retka Stefanie
Published: March 2023

A main research topic in acoustics is the reduction of indoor noise, which has increasingly received attention in recent years. A commonly used solution to solve these problems is reducing noise using damping structures, which absorb sound. This work aims at the numerical optimization
of damping structures in interior problems, following three goals. First, the optimal damping structure for the required frequency range has to be determined. Second, the optimal position of the damping material has to be found. Third, we are focusing on lightweight design, which means that
the amount of damping material used, has to be kept to a minimum. We present the implementation of a genetic algorithm into our open source code, which we use to optimize the damping behaviour and in consequence, the sound propagation for interior problems. We show an example of the application
of this code.
Subjective evaluation for sharp sound image construction based on reverberation control with surround sound system using parametric and electro-dynamic loudspeakers
Authors: Harada Yuna , Geng Yuting , Iwai Kenta , Nakayama Masato , Nishiura Takanobu
Published: March 2023

3-D sound field reproduction systems can provide a high presence. These systems commonly use electro-dynamic loudspeakers. Electro-dynamic loudspeakers tend to construct diffuse sound images due to its wide directivity and high reverberation. In contrast, parametric array loudspeakers
can construct sharp sound images due to its sharp directivity and low reverberation. On the other hand, it is difficult to provide reverberation presence by parametric array loudspeakers because of the sharp directivity. We have previously proposed a sharp sound image construction based on
reverberation control with surround sound system using parametric and electro-dynamic loudspeakers. In this method, the sharp sound image is rendered using parametric array loudspeakers, and the reverberation presence is provided by electro-dynamic loudspeakers, emitting reverberation signals
synthesized with reverberation control filters. Through the objective experiments, we have confirmed that this method can construct the sharp sound image with reverberation presence. In this paper, we conduct subjective experiments to confirm if the listeners can perceive the reverberation
presence provided by the proposed method. In particular, we evaluated the sharpness and direction of the sound image, and the reverberation presence with objective and subjective evaluation experiments. From the subjective evaluation, we confirmed that the reverberation presence can be perceived.
Sound source directivity considering source movement
Authors: Makino Yusuke , Takano Yasushi
Published: March 2023

When the source moves, frequency modulation (Doppler effect) occurs in the radiated sound, and the directivity of source changes. In addition, the source can be not located in a direction from the direction of arrival of radiated sound. Therefore, the sound pressure directivity may
differ depending on whether the source is static or moving. There are two types of wave equations, one that describes sound pressure as a variable and one that describes velocity potential as a variable. When the sound source moves at a constant velocity and the equation is solved assuming
that the source strength is constant with respect to the velocity, the sound pressure directivity of the radiated sound changes depending on the description method of the wave equation. The sound pressure was obtained by solving the wave equations where a single monopole source and a dipole
source are moving at a constant velocity. From the results, we showed the difference of sound pressure directivity when source is moving from the directivity of static source.
Assessment of The Acoustic Scattering Matrix of a Heat Exchanger Using ssCFD-LNSE Simulation
Authors: F. Ganji Hamed , Kornilov Viktor , van Oijen Jeroen , de Goey Philip , Lopez Arteaga Ines
Published: March 2023

The risk of thermoacoustic instability is present in any combustion appliance. The instability results from a closed loop feedback between unsteady combustion, heat-transfer and acoustic modes of the system. To predict the system acoustics all constituting elements of the appliance
need to be modelled. A heat-exchanger is the element where the gas faces complex fluid dynamics and heat transfer processes. Therefore, modelling of (thermo)-acoustic properties of a heat exchanger is challenging. In this paper, a computational approach is proposed to characterize the acoustic
properties of a generic heat exchanger in both laminar and turbulent flow regimes. A hybrid Computational Fluid Dynamics - Computational Aero-Acoustics (CFD-CAA) method is used based on full linearized Navier-Stokes equation, called ssCFD-LNSE. The fundamental idea in this approach is to efficiently
model acoustic wave propagation with inclusion of mean flow and temperature fields. ssCFD-LNSE is performed by splitting the quantities of the total field into a mean part (obtained from CFD) and a (acoustic) perturbation part modelled within the LNSE solver. The goal of this research is to
assess the two-port acoustic scattering matrix of an array of tubes, as a generic model of heat-exchanger, with a hot cross flow.
Urban advanced noise indicator mapping relying on street categorization and measurements
Authors: Van Renterghem Timothy , Van Hauwermeiren Wout , Le Bescond Valentin , Dekoninck Luc , Botteldooren Dick
Published: March 2023

In order to more accurately estimate health outcomes related to environmental noise exposure such as sleep disturbance and noise annoyance, indicators beyond long-term equivalent sound pressure levels might be needed (such as statistical levels, number of events, psycho-acoustical indices
etc). In urban noise mapping, predicting these more advanced noise indicators is especially challenging. In the current work, an open source noise mapping code (NoiseModelling) is combined with micro-traffic simulations. However, in most cities, traffic data availability is poor, especially
in low traffic streets. To overcome this issue, the noise mapping procedure developed here assumes no access at all to traffic information and fully relies on Open Street Map street categorization. These street categorizations were then assigned sets of plausible traffic compositions, counts
and speeds; various scenarios were explicitly simulated. In a next step, these traffic scenarios were weighted to best fit a set of 29 noise indicators on 23 measurement stations deployed in the city of Barcelona, during various periods of the day. It was shown that this procedure leads to
adequate assessments of a wide range of noise indicators in a specific city.
Green transition and noise transition - Europe's first Living Lab on traffic noise
Authors: Huss Karolina , Enevold Sif
Published: March 2023

Around Copenhagen, in the most noise emission plagued areas in Denmark, nine municipalities have joined forces to improve citizens' health and quality of life. Traffic noise is one of the largest environmental problems in our society. In Denmark, over 1.3 million people are estimated
to be affected by traffic noise. Silent City works on several levels with political influence, opinion-making, competence development and the establishment of a Living Lab. Since the start in 2015, the partnership has managed to put traffic noise on the agenda, and on that basis implemented
several concrete initiatives, including a public consultation at the Danish parliament, preparation of a white paper, targeted press efforts and concrete demonstration projects in a single Living Lab. Together we are stronger, and wiser. When municipalities, companies, citizens, regions, and
research institutions work together to reduce traffic noise, promote citizens' quality of life. In the next couple of years, we will use the growing attention on traffic noise and continue to test and develop innovative solutions for combating traffic noise on a 1: 1 scale in natural urban
environments.
Noise Policy in a More Sustainable Future
Authors: Turner Stephen
Published: March 2023

This paper examines the issues that could arise regarding the implementation of noise policy in the context of the need and desire to deal with the effects of climate change. Is it going to be necessary to compromise the standards used or implied in noise policy in order to enable measures
to tackle climate change to be put in place? Based on the author's extensive experience of developing and implementing noise management policy, this paper will consider how the pressures of tackling climate change could impinge on the outcomes that should be sought through noise management
policy. The paper will consider the various types of noise policy that have and do exist and explore the issues that might now have to be addressed in order to secure a more sustainable future.
Basic investigation of sound field inside and outside ear canal under ultrasound irradiation
Authors: Ogawa Yuya , Osumi Ayumu , Ito Youichi
Published: March 2023

In recent years, high-intensity airborne ultrasonic waves applied technology has been developed actively. Accordingly, there are concerns about the effects of sound wave exposure by high-intensity airborne ultrasonic waves. The sound wave intensity is different near the entrance of
the ear canal and near the eardrum, because the wavelength is short in the ultrasonic region. Therefore, it is necessary to know accurately the sound pressure at the eardrum position in considering the effects of sound waves exposure by ultrasonic waves. However, it is difficult to measure
sound pressure near the eardrum with a probe microphone because it may damage the ear canal and eardrum. Against this background, we have studied the sound pressure characteristics inside and outside the ear canal when airborne ultrasonic waves are exposed to the mannequin head (KEMAR) with
a pseudo-ear canal created to imitate the dimensions of the human ear canal. And, we have attempted to estimate the sound pressure value near the eardrum using the sound pressure in the ear canal. In this report, we verified the sound field inside and outside the ear canal and the sound pressure
near the eardrum, when ultrasonic waves (frequency:20 kHz) were irradiated to the mannequin head.
Application of the transfer path analysis to vehicle doors
Authors: Michaelis Thomas , Marburg Steffen , Retka Stefanie
Published: March 2023

Transfer path analysis (TPA) is a proven method for identifying critical structure-borne and airborne sound paths. The basic idea is to divide the overall system into an exciting active component (source) and a passive component, e.g. the mechanical structure to be investigated, with
their respective measurement points. By separating them, two independent systems are created, whereby on one hand, the excitation behaviour can be characterised and on the other hand, the transmission behaviour can be assessed. Finally, both systems are validated by comparing them to each
other and deciding whether changes to source or structure are required or not. The advantage is the simple description of the source as a black box without complex modelling. In this contribution, this systematic is applied to window regulator systems as they are found in vehicles. The focus
is on a hybrid approach between experimental and numerical transfer path analysis. For this purpose, the basic workflow of suitable TPA methods is discussed. This includes the operational measurement of different exciting electric motors variants, the determination of the transfer functions
of the structure, the calculation of the contact forces and the analysis of the individual transfer paths.
Multiscale characterisation of acoustic behaviour of a new bio-based porous material
Authors: Nguyen Vu Hieu , Nguyen Quoc-Bao , Perrot Camille , Rios de Anda Agustín , Renard Estelle , Naili Salah
Published: March 2023

This work aims at studying the mechanical and acoustic behaviours of a new bio-based porous epoxy resin obtained by a "green" adapted combination of the cationic photopolymerization and the porogen leaching technique. This new kind of material generally possesses interconnected
complex morphology and it would be useful to consider this feature in a model. In this study, the effective properties of the material were estimated by using the asymptotic homogenization method. Four types of ordered pore arrangements together with systematic variations of the porosity and
the pore size have been studied. Based on the results of these investigations, a subtle relation between the microstructure and mechanical/acoustic properties has been established. The estimated equivalent dynamic density and equivalent dynamic bulk modulus were compared with experimental
results obtained by conducting the three-microphone impedance tube testing. The processing parameters of material elaboration could be adjusted so that the obtained porous material would possess the best sound absorption performance.
Micro, Small, and Medium Enterprises on Online Media
Authors:   Departemen Manajemen, Universitas Komputer Indonesia, Indonesia, Soegoto Eddy Soeryanto , Rahman M A ,   Departemen Ilmu Komunikasi, Universitas Komputer Indonesia, Indonesia
Published: March 2023

The objective of this study is to analyze the impact of the product promotion method of Micro, Small, and Medium Enterprises (MSME) on selling products based on online media. This study used a descriptive qualitative method. The result of this study is to find out the effective and efficient product promotion in product sales, also to produce quality human ,resources to develop Indonesia in the field of commerce based on online media. The focus includes, Entrepreneurship, Economics, Communication, and Information Technology. MSME based on online media has become a medium that provides business opportunities; therefore, the goal of increasing Indonesia's economy can be achieved.
E-Business through Social Media
Authors:   Departemen Manajemen, Universitas Komputer Indonesia, Indonesia, Soegoto Eddy Soeryanto , Aqila B K ,   Departemen Ilmu Komunikasi, Universitas Komputer Indonesia, Indonesia
Published: March 2023

The purpose of this research is to find out how marketing communication strategies are used in online business. The method of this research used a descriptive method. The results of this research show that doing business is not difficult; the seller can open an online business. Through marketing communication strategies that are attracting and right to the segmentation. As a result of the business that the seller organize can develop well.
Five-Star Hotel Branding Strategy in Banten Province Due to The Covid-19 Pandemic
Authors:   Jurusan Ilmu Ekonomi Pembangunan, Fakultas Ekonomi dan Bisnis, Universitas Sultan Ageng Tirtayasa, Jl. Raya Palka Km 3 Sindangsari, Pabuaran, Kab. Serang Provinsi Banten, Syaifudin Rizal , Desmawan Deris ,   urusan Ilmu Ekonomi Pembangunan, Fakultas Ekonomi dan Bisnis, Universitas Sultan Ageng Tirtayasa, Jl. Raya Palka Km 3 Sindangsari, Pabuaran, Kab. Serang Provinsi Banten, Seyadi Sugeng ,   Jurusan Ilmu Ekonomi Pembangunan, Fakultas Ekonomi dan Bisnis, Universitas Sultan Ageng Tirtayasa, Jl. Raya Palka Km 3 Sindangsari, Pabuaran, Kab. Serang Provinsi Banten
Published: March 2023

This study aimed at examining how the strategy of five-star hotels in Banten Province can maintain its branding due to the Covid-19 pandemic. The Covid-19 pandemic has led to a decrease towards the number of room occupancy rates and average length of staying for majority of guests. Besides, this study used a SWOT analysis to find out various internal and external factors which could affect the hotel condition during the Covid-19 pandemic. Acoording to the SWOT analysis results, the results of weighting and ranking, the Internal Strategic Factors Analysis Summary (IFAS) value was 0.23, and the External Strategic Factors Analysis Summary (EFAS) value was -1.00. Regarding the results of the IFAS and EFAS calculations, it showed that the recommended grand strategy was a defensive strategy in the form of a rebranding strategy. Hence, this research concludes the rebranding strategy form could be in the form of making announcements to the public such as staying at hotels is safe, and hotels always apply strict health protocols, implement "pay now stay latter" by selling staying vouchers to prospective visitors with a pay-now system, staying later as well as making special long stay packages for foreigners who will return to their countries, but they are hampered by the lock down policy or restrictions on large-scale community activities. As a result, there will not provide public transportation in the country or abroad. Therefore, the hotels still can survive and get income during the pandemic
Teacher Communication Behaviour to Mentally Retarded Students of Sukapura in Bandung City during the Covid-19 Pandemic
Authors:   Departemen Ilmu Komunikasi, Fakultas Ilmu Sosial dan Ilmu Politik Universitas Komputer Indonesia, Jalan Dipatiukur no. 102-116, Bandung, Jawa Barat, Surya Desayu Eka , Rismawaty Rismawaty ,   Departemen Ilmu Komunikasi, Fakultas Ilmu Sosial dan Ilmu Politik Universitas Komputer Indonesia, Jalan Dipatiukur no. 102-116, Bandung, Jawa Barat, Efrisely Yuni ,   Departemen Ilmu Komunikasi, Fakultas Ilmu Sosial dan Ilmu Politik Universitas Komputer Indonesia, Jalan Dipatiukur no. 102-116, Bandung, Jawa Barat
Published: March 2023

This research aims to determine the communication behavior used by the teachers of performing arts and handicrafts at SLB C Sukapura Bandung City in motivating mentally retarded students to be creative during the Covid-19 pandemic. The research used a qualitative approach with case studies. The research subjects were 6 informants, consist of three key informants and three supporting informants that were obtained through the purposive sampling technique. The results showed that the teacher’s communication behavior of performing arts and handicrafts at SLB C Sukapura Bandung City in motivating mentally retarded students to be creative during the Covid-19 pandemic was by conducting offline and online learning, using the forms of verbal and nonverbal communication, and through the communication obstacles. This research concluded that the verbal and nonverbal messages cannot be separated because when the teacher communicates, verbal and nonverbal messages would be used simultaneously by the teacher. Moreover, the teachers also approach the mentally retarded students by listening and understanding their complaints to provide support and encouragement for student motivation. The communication obstacles that occur during offline learning were the lack of language skills and the low self-confidence of mentally retarded students. Furthermore, for online learning, some problems became the communication obstacles such as unstable connections, unsupported cellphones, and no internet data were. This research suggested that involving parents role in the learning process can be considered to be done to help students in order to maintain their learning motivation for online learning requires special concentration to focus