Digitalizing sound in your personal space

2021 ◽  
Vol 263 (5) ◽  
pp. 1620-1632
Author(s):  
Ramana Kappagantu ◽  
Karl Karlson ◽  
Koen Vansant
Keyword(s):  
Design Space ◽  
Personal Space ◽  
Living Room ◽  
Acoustic Behavior ◽  
Recent Past ◽  
Frequency Range ◽  
Design Specifications ◽  
The Past ◽  
Audible Frequency ◽  
Order Of Magnitude

Design specifications for appliances are usually in the context of standard acoustic rooms like anechoic (full or hemi) and sometimes reverberant. However in the world of infotainment industry the devices are operated in your personal space - a generic environment like that of a living room and they continuously interact with other devices in real time. One has to take into account the scattering and absorption of sound from different surfaces and how they constructively and destructively interfere in generating a signature sound for the room and the devices. This environmental impact increases the design space significantly and makes it impractical to consider physical prototyping and testing. Simulating the acoustic behavior of the devices in a room environment has been attempted in the past and were successful only for lower frequency ranges or for smaller rooms. High end Multipole BEM and FEM Adaptive Order technologies have emerged in the recent past and together with parallel cloud computing make the modeling of generic room environment more feasible, up to a few kHz given adept hardware setup. A different, more asymptotic method like Ray Tracing provides a real breakthrough here and enables taking on the full audible frequency range and large rooms, in at least one order of magnitude faster solving times compared to the more conventional FEM and BEM method, which further supports optimization possibilities for different configurations in reasonable time.

Entertainment and Resonance

2021 ◽  
pp. 122-137
Author(s):  
Peter Vorderer
Keyword(s):  
Media Use ◽  
Affective States ◽  
Recent Past ◽  
The Past ◽  
First Case ◽  
Self Transcendence ◽  
Entertainment Theory

This chapter aims to differentiate between two kinds of media use experiences that in the past twenty some years have uniformly been labeled entertainment experiences. In the background of four identified fundamental assumptions in entertainment theory (entertainment as reception phenomenon, disparity between what media users want and what they should want, entertainment between approaching and avoiding affective states, entertainment as self-transcendence) media experiences are dichotomized between those that serve users’ hedonic motivations, needs, and interests and others, more fundamental experiences of resonance (which in the recent past have often been labeled eudaimonic) that connect users to the content of a media narrative and ultimately changes them. The argument is made here for communication scholars and media psychologists to refer to entertainment experiences only in the first case in order to be less vague and ambiguous in explicating entertainment theory.

scholarly journals Psychological features of working with destructive conditions of elderly people

2021 ◽  
pp. 75-80
Author(s):  
Volodymyr Shevchenko ◽  
Viktoriia Kopach
Keyword(s):  
Personal Space ◽  
Well Being ◽  
The Elderly ◽  
Self Esteem ◽  
Modern World ◽  
The Past ◽  
Increased Sensitivity ◽  
Life Circumstances ◽  
Psychological Features ◽  
Mental Well Being

This article highlights the psychological features of counseling with problem clients of old age and there adiness of future and practicing psychologists for this work. It is determined that the modern world, duetoits complexity, dynamism and contradictions, creates various problems for the elderly and actively in terferesin his personal space. All this has a negative effecton the health of the elderly and onthestate of their mental well-being. This leads to certain changesin the personality of the old person: in creased feelings of in feriority, in security, fluctuationsin self-esteem, increased sensitivity; depressed mood, feelings of loneliness, helplessness, anxiety, reducedefficiency; restructuringofthe motivational-needs system, valueorientations; adjustmentof «I-concept»; in creasing interestin experiencing the past, its revaluation; exacerbation and changesin some traits; decreas edvoliti on alactivity, apathymayoccur. As a result, the number of elderlypeoplein need of psychological helpissig nificantly increasing. At the same time, dueto subjective and objective reasons, they may not always behavea dequately during psychological counseling, preventing specialists from solving their psychological problems. It was fo undthat the problem clients of the psychologists hould include: anxious individuals; individuals who experiencefear and phobias; hostileandaggressiveindividuals; unmotivatedclients; customers with inflatedrequirements; individuals who experienceguilt (loss); payingcustomers; hysterical personalities; obsessive personalities; paranoid personalities; schizophrenic personalities; antisocial personalities; individuals who abusealcohol; individuals in a state of depression and suicidalideation. Counseling for the elderly can be carried out on the following issues: severeloss and acutegrief, lossoffunctionalability, difficulties or conflictsin relationships and communication, understanding and changingliving conditions, adaptation to new life circumstances, needs assessment, work withstress, loss of meaningin life , fear of death, etc.

scholarly journals Обнаружение высокочастотных альфвеновских колебаний в омических разрядах сферического токамака Глобус-М2

2021 ◽  
Vol 47 (12) ◽  
pp. 17
Author(s):  
И.М. Балаченков ◽  
Ю.В. Петров ◽  
В.К. Гусев ◽  
Н.Н. Бахарев ◽  
В.И. Варфоломеев ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Standing Wave ◽  
High Frequency ◽  
Low Density ◽  
Frequency Range ◽  
High Frequency Oscillations ◽  
Model Predictions ◽  
Mode Excitation ◽  
Order Of Magnitude ◽  
Frequency Chirping

In Globus-M2 ohmic discharges with low density, by means of Mirnov coils array, magnetic field oscillations with frequencies in 1 MHz range were detected. Frequency range of these oscillations significantly exceed the range of TAE and RSAE frequencies, which were previously observed on Globus-M and Globus-M2 tokamaks, and their amplitude, contrary, turned out to be up to an order of magnitude lower. It was found that high frequency oscillations are interrelated with suprathermal electron fraction. At the same time the observed instability seems to have Alfvenic nature, since its frequency correlates well with Alfven frequency scaling. It was also found that magnetic perturbation always forms standing wave with predominantly low toroidal wavenumbers, including n = 0 structure, which makes gap (e.g. TAE) mode excitation impossible. Frequency chirping during single bursts with δω ~ √t is consistent with hole-clump model predictions.

scholarly journals Freshwater Reservoir Effect Variability in Northern Germany

Radiocarbon ◽  
2013 ◽  
Vol 55 (3) ◽  
pp. 1085-1101 ◽  
Author(s):  
Bente Philippsen ◽  
Jan Heinemeier
Keyword(s):  
Radiocarbon Dating ◽  
Potential Problem ◽  
Northern Germany ◽  
Reservoir Effect ◽  
The Past ◽  
Human Bones ◽  
Age Correction ◽  
Order Of Magnitude ◽  
Freshwater Reservoir ◽  
Reservoir Age

The freshwater reservoir effect is a potential problem when radiocarbon dating fish bones, shells, human bones, or food crusts on pottery from sites near rivers or lakes. The reservoir age in hardwater rivers can be up to several thousand years and may be highly variable. Accurate 14C dating of freshwater-based samples requires knowing the order of magnitude of the reservoir effect and its degree of variability. Measurements on modern riverine materials may not give a single reservoir age correction that can be applied to archaeological samples, but they show the order of magnitude and variability that can also be expected for the past. This knowledge will be applied to the dating of food crusts on pottery from the Mesolithic sites Kayhude at the Alster River and Schlamersdorf at the Trave River, both in Schleswig-Holstein, northern Germany.

Quantifying Design Feasibility Using Probabilistic Feasibility Analysis

1991 ◽  
Author(s):  
R. J. Eggert
Keyword(s):  
Design Space ◽  
Mechanical Design ◽  
Three Dimensional ◽  
Feasibility Analysis ◽  
Manufacturing Processes ◽  
Moment Matching ◽  
Probabilistic Constraint ◽  
Constraint Equations ◽  
Design Specifications ◽  
Variation Propagation

Abstract Engineered products are designed for manufacture using nominal values and tolerances. As such, finished products will more or less satisfy design specifications depending on the actual materials and manufacturing processes used. Design feasibility, therefore, depends on how these variations impact specified constraints. Probabilistic feasibility analysis can be used to extend conventional feasibility analysis. By using moment matching and simulation, the probability of points occurring in the design space can be evaluated. The resulting values establish the limits of feasibility and the amount of feasibility in between. The nature of variation in mechanical design is introduced along with concepts of variation propagation in functions of random variables. Moment matching methods are applied to illustrative cases consisting of deterministic and probabilistic constraint equations, resulting in three dimensional feasibility mappings of each design space.

scholarly journals A Unifying View on Individual Bounds and Heuristic Inaccuracies in Bidirectional Search

2020 ◽  
Vol 34 (03) ◽  
pp. 2327-2334
Author(s):  
Vidal Alcázar ◽  
Pat Riddle ◽  
Mike Barley
Keyword(s):  
Lower Bound ◽  
Heuristic Search ◽  
Search Algorithm ◽  
Substantial Improvement ◽  
Full Potential ◽  
The Past ◽  
Heuristic Search Algorithms ◽  
Bidirectional Search ◽  
Order Of Magnitude ◽  
The Cost

In the past few years, new very successful bidirectional heuristic search algorithms have been proposed. Their key novelty is a lower bound on the cost of a solution that includes information from the g values in both directions. Kaindl and Kainz (1997) proposed measuring how inaccurate a heuristic is while expanding nodes in the opposite direction, and using this information to raise the f value of the evaluated nodes. However, this comes with a set of disadvantages and remains yet to be exploited to its full potential. Additionally, Sadhukhan (2013) presented BAE∗, a bidirectional best-first search algorithm based on the accumulated heuristic inaccuracy along a path. However, no complete comparison in regards to other bidirectional algorithms has yet been done, neither theoretical nor empirical. In this paper we define individual bounds within the lower-bound framework and show how both Kaindl and Kainz's and Sadhukhan's methods can be generalized thus creating new bounds. This overcomes previous shortcomings and allows newer algorithms to benefit from these techniques as well. Experimental results show a substantial improvement, up to an order of magnitude in the number of necessarily-expanded nodes compared to state-of-the-art near-optimal algorithms in common benchmarks.

scholarly journals An Ion Source for the HVEE 14C Isotope Ratio Mass Spectrometer for Biomedical Applications

Radiocarbon ◽  
1997 ◽  
Vol 40 (1) ◽  
pp. 283-288 ◽  
Author(s):  
Dirk J. W. Mous ◽  
Wim Fokker ◽  
Rein Van Den Broek ◽  
Ron Koopmans ◽  
Christopher Bronk Ramsey ◽  
...  
Keyword(s):  
Biomedical Research ◽  
Biomedical Applications ◽  
Ion Source ◽  
User Friendliness ◽  
The Past ◽  
Widespread Acceptance ◽  
First Results ◽  
Order Of Magnitude ◽  
Isotope Ratio Mass Spectrometer ◽  
Near Future

During the past two decades, accelerator mass spectrometry (AMS) has allowed major developments in many areas of geosciences and archaeology. In the near future, AMS should realize a similar potential in the field of biomedical research, leading ultimately to clinical applications. For such applications, the required instrument differs significantly from that presently used in the field of 14C dating. Whereas the needed accuracy and sensitivity is more than an order of magnitude less demanding than that for present state-of-the-art 14C instrumentation, the widespread acceptance of 14C AMS in biomedical research will require AMS spectrometers that are small, simple to operate and capable of handling CO2 samples. In order to satisfy these demands, HVEE has developed a compact 14C AMS spectrometer dedicated to biomedical research. The instrument consists of a compact accelerator with a footprint of 2.25 × 1.25 m and an ion source that features direct CO2 acceptance and optimal user friendliness. Having previously described the layout and design of the accelerator, we here discuss progress on the accelerator and present the design and first results of the CO2 ion source.

scholarly journals Modeling the radio outbursts in AE Aquarii

2004 ◽  
Vol 190 ◽  
pp. 307-313
Author(s):  
L. A. Venter ◽  
P. J. Meintjies
Keyword(s):  
Magnetic Field ◽  
Wide Frequency Range ◽  
Polar Field ◽  
Synchrotron Emission ◽  
Frequency Range ◽  
Thermal Radio ◽  
Infra Red ◽  
Peak Flux ◽  
Order Of Magnitude

AbstractIn this paper we model the non-thermal radio to infra-red flares from AE Aqr. In our model the non-thermal flares originate in highly magnetized (Bblob ≥ 2000 G) blobs that may be among the propeller ejected outflow. It was shown that the condition ß ≤ 1 constrains the frozen-in magnetic field in these blobs to Bblob ≥ 2000 G, which is of the same order of magnitude as the inferred polar field of the secondary. As these magnetized blobs encounter the violent mhd-propeller, processes such as reconnection, magnetic pumping, and shocks will result in continuous acceleration of electrons from (γ = 2 → 30; δ = 2.8 → 2.6) with resultant synchrotron emission. The total radio to infra-red flare spectrum was modelled in terms of such expanding magnetized synchrotron emitting blobs in various stages of their evolution from ρ = (r/r°) = 1 → 400. In terms of our model, the total integrated flux during outbursts, over the wide frequency range from 1 GHz is the result of several (~ 20) synchrotron emitting blobs observed in different stages of their evolution, resulting in a spectrum showing a peak flux of Sv ~ 148 mJy at v ~ 1805 GHz (~ 166 microns), where the spectrum changes from a typical self-absorbed Sv ∝ vα spectrum to Sv ∝ v-(δ-1)/2 spectrum, i.e. where the blobs are combined optically thin.

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