Bibliografie tematiche / AERPs

Indice

  1. Articoli di riviste
  2. Tesi
  3. Libri
  4. Capitoli di libri
  5. Atti di convegni
  6. Rapporti di organizzazioni

Letteratura scientifica selezionata sul tema "AERPs"

Autore: Grafiati
Pubblicato: 7 dicembre 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "AERPs".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "AERPs"

1

Phillipova, DoljaT, Vichren Tchakaroff e Angel Angelow. "Motivation and AERPs of normal subjects and schizophrenics". International Journal of Psychophysiology 11, n. 1 (luglio 1991): 64–65. http://dx.doi.org/10.1016/0167-8760(91)90271-x.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Shiwa, M., A. Yamaguchi, M. Sato, S. Murao e M. Nagai. "Acoustic Emission Waveform Analysis From Weld Defects in Steel Ring Samples". Journal of Pressure Vessel Technology 121, n. 1 (1 febbraio 1999): 77–83. http://dx.doi.org/10.1115/1.2883671.

Testo completo
Abstract (sommario):
Acoustic emission (AE) signals from weld defects, incomplete penetration (IP), slag inclusion (SI), and porosity (PR), in longitudinal seam welding of UOE steel pipes were evaluated by using an envelope analysis system and waveform analysis system. In test results, the location accuracy of the envelope and the waveform systems during the loading tests were a few 10 mm and a few mm, respectively. AE activity and intensity and waveform type could identify the welding defect types. Three types of AE spherical radiation patterns (AERPs), a monopole mode, a tensile fracture of dipole mode, and a tensile and shear mixed of dipole mode, were observed during the test. Information from cross section observation of the IP by SEM and AERP suggested that activity and intensity of AE signals from welding defects could depend on both stress concentration of the defect and brittleness of the microstructure around the defect.
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Arunphalungsanti, Kittipun, e Chailerd Pichitpornchai. "Brain Processing (Auditory Event-Related Potential) of Stressed Versus Unstressed Words in Thai Speech". Perceptual and Motor Skills 125, n. 6 (16 agosto 2018): 995–1010. http://dx.doi.org/10.1177/0031512518794107.

Testo completo
Abstract (sommario):
This study investigated the effect of the stressed word in Thai language on auditory event-related potential (aERP) in unattended conditions. We presented 30 healthy participants with monosyllabic Thai words consisting of either stressed or unstressed words. We instructed them not to attend to the sound stimuli, but rather to watch and memorize the contents of a silent natural documentary without subtitles. The two listening conditions consisted of 20% deviant stimuli (70 stressed and 70 unstressed words, respectively) and 80% standard stimuli (other 280 unstressed words) presented pseudorandomly and binaurally via a pair of earphones. Participants’ aERPs from the two conditions were evaluated by the mismatch negativity (MMN) component of aERP. The mismatch negativity amplitudes in the stressed word condition were significantly higher than those in the unstressed word condition, especially in frontal and left fronto-central brain areas. Therefore, these data show the role of the frontal and left fronto-central brain regions in auditory preattentive processing of stressed word perception among native Thai speakers. This is the first study demonstration that stressed meaningful monosyllable words in tonal language facilitate word perception in this preattentive stage. This result has implications for developing clinical tests evaluating preattentive speech perception.
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Folmer, Robert L., Jay J. Vachhani e Amy Riggins. "Electrophysiological Evidence of Auditory and Cognitive Processing Deficits in Parkinson Disease". BioMed Research International 2021 (18 giugno 2021): 1–8. http://dx.doi.org/10.1155/2021/6610908.

Testo completo
Abstract (sommario):
Background. Parkinson’s disease (PD) patients are at increased risk for central auditory processing (CAP) deficits and cognitive dysfunction. However, behavioral assessments of CAP and cognitive processing used in a previous study by our research team found few significant differences in performance between early-stage PD patients and age-matched control subjects. The objective of this study is to use auditory event-related potentials (AERPs) to compare CAP and cognitive functions in a population of PD patients with a group of age-matched control subjects. Methods. AERPs in response to tonal and speech stimuli were recorded from 35 adults who had a medical diagnosis of PD (23 males and 12 females; mean age = 66.9 ± s . d . 11.2 years ), and 35 age-matched control subjects who did not have PD or any other neurological disorders (31 males and 4 females; mean age = 65.4 ± s . d . 12.3 years ). Auditory stimuli included pure tones (500 and 1000 Hz) to elicit the P300 response and a dichotic digits paradigm to elicit the N200 processing negativity. Results. Compared to control subjects, PD patients exhibited significantly longer latencies of P300 and N200 components and smaller amplitude N200 components. Latency and amplitude of the N200 component were significantly correlated with participants’ age. N200 amplitude was correlated with results from the Rey Auditory Verbal Learning Test (RAVLT) of cognitive ability. Latency of the P300 and amplitude of the N200 components were significantly correlated with results from the Spatial Release From Masking (SRM) behavioral CAP assessment. Conclusions. AERP assessments used in this study appear to be sensitive indicators of CAP and cognitive deficits exhibited by early-stage PD patients. While few significant differences in performance on behavioral CAP and cognitive tests were previously observed between this population of PD patients and age-matched control subjects, N200 and P300 components recorded in the present study revealed impaired neural processing by the PD group.
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Henkin, Yael, Yifat Yaar-Soffer, Lihi Givon e Minka Hildesheimer. "Hearing with Two Ears: Evidence for Cortical Binaural Interaction during Auditory Processing". Journal of the American Academy of Audiology 26, n. 04 (aprile 2015): 384–92. http://dx.doi.org/10.3766/jaaa.26.4.6.

Testo completo
Abstract (sommario):
Background: Integration of information presented to the two ears has been shown to manifest in binaural interaction components (BICs) that occur along the ascending auditory pathways. In humans, BICs have been studied predominantly at the brainstem and thalamocortical levels; however, understanding of higher cortically driven mechanisms of binaural hearing is limited. Purpose: To explore whether BICs are evident in auditory event-related potentials (AERPs) during the advanced perceptual and postperceptual stages of cortical processing. Research Design: The AERPs N1, P3, and a late negative component (LNC) were recorded from multiple site electrodes while participants performed an oddball discrimination task that consisted of natural speech syllables (/ka/ vs. /ta/) that differed by place-of-articulation. Participants were instructed to respond to the target stimulus (/ta/) while performing the task in three listening conditions: monaural right, monaural left, and binaural. Study Sample: Fifteen (21–32 yr) young adults (6 females) with normal hearing sensitivity. Data Collection and Analysis: By subtracting the response to target stimuli elicited in the binaural condition from the sum of responses elicited in the monaural right and left conditions, the BIC waveform was derived and the latencies and amplitudes of the components were measured. The maximal interaction was calculated by dividing BIC amplitude by the summed right and left response amplitudes. In addition, the latencies and amplitudes of the AERPs to target stimuli elicited in the monaural right, monaural left, and binaural listening conditions were measured and subjected to analysis of variance with repeated measures testing the effect of listening condition and laterality. Results: Three consecutive BICs were identified at a mean latency of 129, 406, and 554 msec, and were labeled N1-BIC, P3-BIC, and LNC-BIC, respectively. Maximal interaction increased significantly with progression of auditory processing from perceptual to postperceptual stages and amounted to 51%, 55%, and 75% of the sum of monaural responses for N1-BIC, P3-BIC, and LNC-BIC, respectively. Binaural interaction manifested in a decrease of the binaural response compared to the sum of monaural responses. Furthermore, listening condition affected P3 latency only, whereas laterality effects manifested in enhanced N1 amplitudes at the left (T3) vs. right (T4) scalp electrode and in a greater left–right amplitude difference in the right compared to left listening condition. Conclusions: The current AERP data provides evidence for the occurrence of cortical BICs during perceptual and postperceptual stages, presumably reflecting ongoing integration of information presented to the two ears at the final stages of auditory processing. Increasing binaural interaction with the progression of the auditory processing sequence (N1 to LNC) may support the notion that cortical BICs reflect inherited interactions from preceding stages of upstream processing together with discrete cortical neural activity involved in binaural processing. Clinically, an objective measure of cortical binaural processing has the potential of becoming an appealing neural correlate of binaural behavioral performance.
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Laurent, Jean-Paul, e Jacinthe Baribeau. "AERPs and clinical evolution of thought disorders over five years". International Journal of Psychophysiology 13, n. 3 (dicembre 1992): 271–82. http://dx.doi.org/10.1016/0167-8760(92)90077-o.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Colucci, Fabiana, Sara Stefanelli, Elena Contaldi, Andrea Gozzi, Alessia Marchetti, Maura Pugliatti, Michele Laudisi et al. "Cognition in Patients with Spinocerebellar Ataxia 1 (SCA1) and 2 (SCA2): A Neurophysiological and Neuropsychological Approach". Journal of Clinical Medicine 13, n. 16 (19 agosto 2024): 4880. http://dx.doi.org/10.3390/jcm13164880.

Testo completo
Abstract (sommario):
Background/Objectives: Cognitive impairment in spinocerebellar ataxia patients has been reported since the early-disease stage. We aimed to assess cognitive differences in SCA1 and SCA2 patients. Methods: We performed neuropsychological (NPS) and neurophysiological (auditory event-related potentials, aERPs) assessments in 16 SCA1 and 18 SCA2 consecutive patients. Furthermore, clinical information (age at onset, disease duration, motor disability) was collected. Results: NPS tests yielded scores in the normal range in both groups but with lower scores in the Frontal Assessment Battery (p < 0.05) and Visual Analogue Test for Anosognosia for motor impairment (p < 0.05) in SCA1, and the Trail Making Test (p < 0.01), Raven’s progressive matrices (p < 0.01), Stroop (p < 0.05), and emotion attribution tests (p < 0.05) in SCA2. aERPs showed lower N100 amplitude (p < 0.01) and prolonged N200 latency (p < 0.01) in SCA1 compared with SCA2. Clinically, SCA2 had more severe motor disability than SCA1 in the Assessment and Rating of Ataxia Scale. Conclusions: SCA2 showed more significant difficulties in attentional, visuospatial, and emotional function, and greater motor impairment. In contrast, SCA1 showed less cognitive flexibility/phasic ability, probably affected by a more severe degree of dysarthria. The same group revealed less neural activity during nonconscious attentional processing (N100-N200 data), suggesting greater involvement of sensory pathways in discriminating auditory stimuli. NFS did not correlate with NPS findings, implying an independent relationship. However, the specific role of the cerebellum and cerebellar symptoms in NPS test results deserves more focus.
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Bober, Sara L., John Ciriello e Douglas L. Jones. "Atrial arrhythmias and autonomic dysfunction in rats exposed to chronic intermittent hypoxia". American Journal of Physiology-Heart and Circulatory Physiology 314, n. 6 (1 giugno 2018): H1160—H1168. http://dx.doi.org/10.1152/ajpheart.00173.2017.

Testo completo
Abstract (sommario):
Obstructive sleep apnea, which involves chronic intermittent hypoxia (CIH), is a major risk factor for developing atrial fibrillation (AF). Whether or not CIH alone alters cardiac mechanisms to support AF is unknown. This study investigated the effects of CIH on atrial electrophysiology and arrhythmia vulnerability and evaluated the role of autonomics in CIH promotion of AF. Adult male Sprague-Dawley rats were exposed to 8 h/day of CIH or normoxia for 7 days. After exposure, rats were anesthetized for intracardiac electrophysiological experiments. Atrial effective refractory periods (AERPs) and AF inducibility were determined using programmed electrical stimulation and burst pacing in the absence and presence of autonomic receptor agonists and antagonists. Western blot analysis measured atrial protein expression of muscarinic M2, M3, and β1-adrenergic receptors. Compared with normoxia-exposed control rats, CIH-exposed rats had enhanced AF vulnerability using both programmed electrical stimulation and burst pacing, accompanied by greater AERP responses to carbachol and propranolol, lesser responses to isoproterenol, and higher atrial M2 receptor protein levels. Enhanced atrial vulnerability was accentuated by carbachol and abolished by atropine, indicating that the AF-promoting effects of CIH depended principally on parasympathetic activation. Enhancement of atrial vulnerability and AERP shortening with cholinergic agonists in CIH-exposed rats is consistent with sensitivity to parasympathetic activation. Higher responses to adrenergic receptor blockade in CIH-exposed rats is consistent with sympathetic potentiation. These findings implicate CIH as an important mediator of enhanced AF susceptibility in obstructive sleep apnea and provide novel insights into the underlying mechanisms. NEW & NOTEWORTHY Our study demonstrates, for the first time, that chronic intermittent hypoxia alone enhances vulnerability to atrial arrhythmia induction, which depends principally on parasympathetic activation. Enhanced atrial vulnerability was accompanied by heightened electrophysiological responses of the atrial myocardium to carbachol and isoproterenol, dampened responses to propranolol, and increased atrial M2 receptor protein levels.
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Satterfield, James H., Anne M. Schell e Richard W. Backs. "Longitudinal study of AERPs in hyperactive and normal children: relationship to antisocial behavior". Electroencephalography and Clinical Neurophysiology 67, n. 6 (dicembre 1987): 531–36. http://dx.doi.org/10.1016/0013-4694(87)90055-1.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Kolev, V., J. Yordanova e V. Silyamova. "An approach to studying the development of a slow negative wave in children's AERPs". International Journal of Psychophysiology 11, n. 1 (luglio 1991): 46. http://dx.doi.org/10.1016/0167-8760(91)90197-6.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Tesi sul tema "AERPs"

1

Colas, Tom. "Externalisation en restitution binaurale non-individualisée avec head-tracking : aspects objectifs et perceptifs". Electronic Thesis or Diss., Brest, 2024. http://www.theses.fr/2024BRES0053.

Testo completo
Abstract (sommario):
La restitution binaurale est une méthode de restitution du son au casque visant à simuler une écoute naturelle. Souvent, les sons restitués au casque semblent provenir de l’intérieur de la tête. Pour une restitution binaurale convaincante, les sons doivent paraître venir de l’extérieur (externalisés), comme dans la réalité. L’utilisation d’un système de suivi des mouvements de tête (head-tracking) peut permettre d’améliorer l’externalisation pendant et après les mouvements. Cette thèse examine l’effet de persistance de l’amélioration d’externalisation après des mouvements de tête. Une première étude a combiné une expérience comportementale et une expérience EEG pour identifier un corrélat neuronal de l’externalisation.Une méthode innovante, exploitant cet effet de persistance de l’externalisation, a été développée afin de comparer des stimuli "acoustiquement identiques", mais avec différents niveaux d’externalisation. Les résultats n’ont pas révélé de corrélat neuronal, mais ont soulevé plusieurs questions sur l’influence de la nature et de la durée des sources sonores sur l’effet de persistance de l’externalisation.Une deuxième étude, comportant trois expériences comportementales, a été menée afin d’aborder ces questions. Les résultats ont montré que l’amélioration d’externalisation après des mouvements de tête fonctionne pour différentes sources, mais diminue après une dizaine de secondes
Binaural reproduction is a method of sound playback through headphones aimed at simulating natural listening. Often, sounds played through headphones seem to originate from inside the head. For convincing binauralreproduction, sounds must appear to come from outside (externalized), as they do in reality.Using a head-tracking system can enhance externalization during and after headmovements. This thesis examines the persistence of the head movements after-effect on externalization. The first study combined a behavioral experiment and an EEG experiment to identify a neural correlate of externalization.An innovative method leveraging this after-effect was developed to compare "acoustically identical" stimuli with different levels of externalization. The results did not reveal a neural correlate but raised several questions about the influence of the nature and duration of sound sources on the head movements after-effect on externalization. A second study, involving three behavioral experiments, was conducted to address these questions. The results showed that the improvement in externalization after head movements works for various sound sources but decreases after about ten seconds
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Andersson, Johan. "Utvärdering och förbättring gällande Volvo Aeros tillämpning av metodiken praktisk problemlösning". Thesis, Högskolan Väst, Avd för industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-4306.

Testo completo
Abstract (sommario):
Volvo Aero utvecklar, konstruerar, tillverkar och utför underhåll av motorer och tillhörande komponenter för civila och militära flygplan. Visionen är att leverera världsledande transportlösningar genom ständig förbättring och långsiktig utveckling av verksamheten, vilket för det dagliga arbetet innebär systematisk problemlösning genom metodiken praktisk problemlösning, vars ursprung är Toyota. Syftet med studien var att undersöka huruvida Volvo Aeros tillämpning av praktisk problemlösning var enkel, systematisk och vägledande, vilket ur Toyotas perspektiv ger förutsättning för effektiv problemlösning. Inledningsvis beskrevs Toyotas inställning och beteende till problemlösning utifrån The Toyota Way, som sedan följdes upp med en litteraturstudie gällande praktisk problemlösning. Vidare genomfördes en pilotstudie där Volvo Aeros tillämpning av praktisk problemlösning applicerades på ett organisatoriskt problem. Därefter utvärderades pilotstudien och förbättringsområden identifierades där metodiken var svår, otydlig och otillräckligt vägledande. Slutligen föreslogs följande förbättringar gällande Volvo Aeros tillämpning av praktisk problemlösning, vilka var vetenskapligt förankrade till Toyota. Definiering och analysering av symtomen ger förståelse för problemets orsaker. Kvantifiering av nuvarande tillstånd och det förväntades åskådliggör problemets omfattning. Framgår grundorsaken tydligt är sannolikt motåtgärden uppenbar. En god tillämpning av Plan-Do-Check-Act (PDCA) utgör ett effektivt och kraftfullt maskineri för ständig förbättring. Förbättringarna som föreslogs syftade till att förenkla Volvo Aeros metodik och ge användaren ökad trygghet och vägledning, vilket ger förutsättning för effektiv problemlösning som möjliggör daglig tillämpning och främjar ständig förbättring.
Volvo Aero develops, designs, manufactures and performs maintenance of engine and related components for civil and military aircrafts. The vision is to deliver world-leading transport solutions through continuous improvement and long term business deployment, which for the daily work means systematic problem solving through the methodology practical problem solving, whose origin is Toyota. The purpose of this thesis was to examine whether Volvo Aero’s approach of practical problem solving was simple, systematic and guided, which from Toyota’s point of view creates sound conditions for effective problem solving. Initially, Toyota’s attitude and behaviour towards problem solving was described from the point of view of The Toyota Way. Thereafter, a literature study on practical problem solving was completed. Furthermore, a pilot study was carried out where Volvo Aero’s approach to practical problem solving was applied to an organisational problem. The pilot study was evaluated and areas for improvements were identified where the methodology was difficult, indistinct and inadequate guided. Finally, improvements were proposed regarding Volvo Aero’s approach to practical problem solving, which was scientifically anchored to Toyota. Defining and analysing the symptoms brings understanding for the causes of the problem Quantifying the present condition and the expected illustrates the magnitude of the problem Appears the root cause to be clear is probably the countermeasure obvious A considerable approach using Plan-Do-Check-Act (PDCA) provides an effective and strong tool for continuous improvement The improvements were proposed with purpose to simplify Volvo Aero’s methodology and to support and guide the user, which creates sound conditions for effective problem solving and provides opportunities for daily use that foster continuous improvement.
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Silva, Emanuelle Batista Felismino da. "Efeitos de furocumarinas associadas à luz ultravioleta B (312mn) em staphylococcus aerus". Universidade Federal da Paraí­ba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/3647.

Testo completo
Abstract (sommario):
Made available in DSpace on 2015-04-01T14:16:02Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 578629 bytes, checksum: 0e1eef478991e7f411dddd815ac56a75 (MD5) Previous issue date: 2013-08-09
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Furocoumarins (FCs) are an important class of photoactive compounds which may potentially bind to DNA forming intermolecular complexes, and once excited by UVA light (~ 365 nm) they re able to form photoadducts, which may result in mutagenicity and lethality. However, when the 8-methoxypsoralen (8-MOP) is added to the post-irradiation plating medium increases the sensitization probably by inhibiting repairs in damaged DNA. The FCs also have a protective effect against UVC (~254 nm) attributed to the inhibition of pyrimidine dimers. FCs associated with UVB light (312 nm), remain few known. The aim of the present study was to investigate the lethal effect of UVB light alone, and combined with solutions of 8-MOP, 4,5',8-trimethylpsoralen (TMP) and 3-carbetoxypsoralen (3-CPs) at different concentrations on Staphylococcus aureus growth. We also evaluated the effect of these FCs in the plating medium. Treatment with 8-MOP-UVB and TMP-UVB were more effective in inducing lethality than the UVB treatment alone. Increasing the solution concentration of 8-MOP resulted in a higher mortality while the increase in the concentration of the TMP led to a reduction in the lethality. For other hand, 3-CPs displayed a photoprotective effect against UVB damage in all concentrations tested. The results of FCs in the plating medium showed that the 8-MOP induzed a higher lethal effect and also increased mortality from bacterial strain treated by FC-UVB. The different behaviors shown by FCs may be related with differences in the sequence specificity of binding and photoreaction, inhibition of pyrimidine dimers formation by intercalated molecules and efficacy of repair systems. These results emphasize the need for further studies to elucidate the participation of FCs as photosensitizing and photoprotective agents in biological systems, when combined with UVB.
As furocumarinas (FCs) são uma importante classe de compostos fotoativos que potencialmente podem se ligar ao DNA formando complexos intermoleculares, e uma vez excitados por luz UVA (~365 nm) são capazes de formar fotoadições, que podem resultar em mutagênese e letalidade. Porém, quando a 8-metoxipsoraleína (8-MOP) está adicionada ao meio de plaqueamento pós-irradiação aumenta a sensibilidade provavelmente por inibir reparo de lesões no DNA. As FCs também possuem efeito protetor contra UVC (~254 nm) atribuído à inibição da formação de dímeros de pirimidina. As FCs associadas à UVB (312 nm) permanecem pouco conhecidas. O objetivo do presente estudo foi investigar o efeito da luz UVB, e combinada com soluções de 8-MOP, 4,5 ,8-trimetilpsoraleína (TMP) e 3-carbetoxipsoraleína (3-CPs) em diferentes concentrações, sobre o crescimento de Staphylococcus aureus. Avaliamos também o efeito destas FCs em meio de plaqueamento. O tratamento com 8-MOP-UVB e TMP-UVB foram mais eficazes em induzir letalidade do que o tratamento apenas com UVB. O aumento da concentração de 8-MOP resultou em mortalidade mais elevada enquanto que o aumento na concentração de TMP levou a redução na mortalidade. Por outro lado, 3-CPs exibiu efeito fotoprotetor contra danos causados por UVB em todas as concentrações testadas. Os resultados com FCs no meio de plaqueamento mostraram que a 8-MOP induziu o maior efeito letal e também aumentou a mortalidade da cepa bacteriana tratada por FC-UVB. Os diferentes efeitos apresentados pelas FCs podem estar relacionados com diferenças na especificidade por seqüência de ligação e fotorreação, a inibição da formação de dímeros de pirimidina por moléculas intercaladas e eficácia de sistemas de reparo. Esses resultados reforçam a necessidade de mais estudos para elucidar a participação das FCs como agentes fotossensibilizantes e fotoprotetores em sistemas biológicos, quando combinadas com UVB.
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Aerts, Nieke [Verfasser], Stefan [Akademischer Betreuer] Felsner e Alexander [Akademischer Betreuer] Wolff. "Geometric representations of planar graphs / Nieke Aerts. Gutachter: Alexander Wolff. Betreuer: Stefan Felsner". Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1068856092/34.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Jay, Caroline. "Le risque santé et la souscription d’assurance du crédit". Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0395.

Testo completo
Abstract (sommario):
La santé est un risque. La raison d’être de l’assurance est de couvrir les individus contre les aléas de la vie. Pourtant, la nature économique de cette opération a conduit les assureurs à écarter de leur mutualité, de manière croissante, les plus hauts risques de survenance d’un sinistre. Cette pratique appelée la segmentation est parfaitement autorisée. L’assureur peut, au moment de la discussion précontractuelle, procéder à une évaluation du risque par des investigations sur la situation personnelle et intime du candidat à l’assurance. Plusieurs constats sont faits. Le fait justificatif de discrimination n’est plus précis. Les techniques de collecte de l’information s’émancipent d’un encadrement légal sécurisé. L’existence d’un risque aggravé a des conséquences déraisonnables sur le contrat d’assurance. En France, plus de 2,7 millions de personnes présentent, au sens des assureurs, un risque aggravé du fait de leur état de santé. Il s’agit aussi bien de personnes diabétiques, atteintes de la maladie de parkinson ou ayant développé une pathologie cancéreuse. Pour eux l’accès à l’assurance rime avec le refus, les exclusions ou les surprimes. Ce phénomène concourt à une véritable injustice sociale, particulièrement lorsque le contrat d’assurance conditionne l’octroi d’un crédit immobilier. Pour cette raison, et sous les pressions associatives, des mesures ont été prises visant à limiter l’intrusion de l’assureur dans la vie privée du preneur d’assurance et parallèlement à renforcer les obligations d’information, de conseil ou de mise en garde du professionnel préalablement à la souscription du contrat
Health is a risk. The main purpose of insurance is to cover individuals against life’s uncertainties. However, because of the economic nature of this activity, insurers discard more and more the highest risks from their mutuality. This practice, named segmentation, is perfectly allowed. The insurer may, at the time of precontractual discussions, carry out a risk assessment by investigating the personal and intimate situation of the applicant. Several observations can be made. Evidence of discrimination is no longer precise. The techniques for information gathering emancipate themselves from a secure legal framework. The existence of an increased risk has unreasonable consequences on the insurance contract. In France, more than 2.7 million people are, in the sense of insurers, increased risks profiles due to their health status. Those are people living with diabetes, Parkinson's disease or other cancerous pathologies. For them, access to insurance rhymes with refusal, exclusion or additional premia. This phenomenon contributes to a real social injustice, especially when the insurance contract is necessary to be granted a mortgage. For this reason, and under pressures from associations, some measures have been implemented to limit the intrusion of the insurer into the policyholder’s privacy; and in parallel, to strengthen the obligations lying on the professionals to provide information, advice and warning, prior to any contract subscription
Gli stili APA, Harvard, Vancouver, ISO e altri
6

QUEIROZ, Malthus Oliveira de. "Gestão da Informação para a Organização do Conhecimento no Terceiro Setor: Um estudo de caso na AERPA". Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/10443.

Testo completo
Abstract (sommario):
Submitted by Chaylane Marques (chaylane.marques@ufpe.br) on 2015-03-04T17:47:21Z No. of bitstreams: 2 Dissertação malthus de Queiroz.pdf: 1414494 bytes, checksum: 1ff8e17a56adee113aa4cab1d943b08f (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5)
Made available in DSpace on 2015-03-04T17:47:21Z (GMT). No. of bitstreams: 2 Dissertação malthus de Queiroz.pdf: 1414494 bytes, checksum: 1ff8e17a56adee113aa4cab1d943b08f (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013-02-28
CAPES
O presente estudo se configura em uma pesquisa exploratória de caráter qualitativo, tendo como estratégia de pesquisa o estudo de caso, visando a identificação dos processos que podem constituir uma gestão da informação para a formatação de uma organização do conhecimento na Agência de Estudos e Restauro do Patrimônio (AERPA), instituição do terceiro setor atuante na Região Metropolitana do Recife. Para tanto, a pesquisa se pauta nos procedimentos metodológicos da investigação documental, observação e entrevista com atores-chave dos processos gerenciais da AERPA. A análise dos resultados se pautará na técnica de análise de conteúdo, enfatizando a presença ou ausência de alguma característica de conteúdo ou de um conjunto de características observados nas entrevistas. A importância desse estudo se justifica mediante três aspectos: o das organizações do terceiro setor, que, apesar de gozarem de grande representatividade no campo das ações sociais, ainda constituem campo incipiente no que tange aos estudos de gestão da informação e organização do conhecimento; o da gestão da informação e organização do conhecimento, que contribuem para a otimização das atividades organizacionais, embora ainda pouco estudados no terceiro setor; e o da Ciência da Informação, propondo uma abordagem sistêmica que enfatiza o elemento humano nas atividades informacionais e de conhecimento nas organizações. Ademais, considera a gestão da informação como um processo que visa otimizar a identificação, a obtenção, o tratamento, a distribuição, o uso, o armazenamento e o descarte da informação, e a organização do conhecimento como uma organização capaz de gerar significado ao contexto de sua atuação, criar conhecimento e sistematizar a tomada de decisões com base no conhecimento gerado. Os resultados apontam que os processos gerenciais da informação podem embasar a formatação de uma organização do conhecimento, através da otimização do fluxo da informação e melhoramento do comportamento informacional dentro do ambiente da organização.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Ohler, Uwe [Gutachter], David [Gutachter] Garfield e Stein [Gutachter] Aerts. "Characterization of cis-regulatory elements via open chromatin profiling / Gutachter: Uwe Ohler, David Garfield, Stein Aerts". Berlin : Humboldt-Universität zu Berlin, 2019. http://d-nb.info/1194925413/34.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

VanDerPuy, Peter Joel. ""Uis Ingens Aeris Alieni": Agriculture and Debt in the Early Roman Republic, c. 450-287 BC". The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu149243759177081.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Weiss, Pierre. "Etude theorique et experimentale de la compression d'un fluide diphasique : application au pompage de liquides aeres". Paris, ENSAM, 1996. http://www.theses.fr/1996ENAM0003.

Testo completo
Abstract (sommario):
Apres une etude theorique des ecoulements monophasiques dans des roues de pompes axiales et centrifuges, basees notamment sur la methode des singularites, permettant de fournir des champs de vitesses et pression bidimensionnels, une analyse du deplacement de bulles de gaz au sein de differents organes de pompes est presentee. Une experimentation assez complete sur des pompes de differents types (pompes axiales, pompes centrifuges, pompe mixte et pompe a canal lateral) confirme en un premier temps les resultats de la premiere partie et montre l'apparition, sur les performances globales de ces pompes, d'une perte complementaire due a la presence de gaz. Cette perte, caracterisee par un coefficient adimensionnel k, depend notamment de la concentration en gaz et permet de classifier les pompes etudiees
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Schilb, Henry. "Byzantine identity and its patrons embroidered aeres and epitaphioi of the Palaiologan and post-Byzantine periods /". [Bloomington, Ind.] : Indiana University, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3358943.

Testo completo
Abstract (sommario):
Thesis (Ph.D.)--Indiana University, Dept. of History of Art, 2009.
Title from PDF t.p. (viewed on Feb. 8, 2010). Source: Dissertation Abstracts International, Volume: 70-05, Section: A, page: 1457. Adviser: W. Eugene Kleinbauer.
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Libri sul tema "AERPs"

1

Angelakē-Rouk, Katerina. Epilogos aeras. Athēna: Kedros, 1990.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

United States. Environmental Protection Agency. Office of Acid Deposition, Environmental Monitoring and Quality Assurance, a cura di. AERP status. Washington, DC: U.S. Environmental Protection Agency, Office of Acid Deposition, Environmental Monitoring and Quality Assurance, 1990.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

United States. Environmental Protection Agency. Office of Acid Deposition, Environmental Monitoring and Quality Assurance, a cura di. AERP status. Washington, DC: U.S. Environmental Protection Agency, Office of Acid Deposition, Environmental Monitoring and Quality Assurance, 1987.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Kalokyrēs, Dēmētrēs. O kakos aeras. (Greece): D. Kalokyrēs, 1988.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Kalokyrēs, Dēmētrēs. Ho kakos aeras. [Greece]: D. Kalokyrēs, 1988.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Alfonso, Paolella, a cura di. De aeris transmutationibus. Napoli: Edizioni scientifiche italiane, 2000.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Peach, D. Wallace. The melding of Aeris. Maynard, Arkansas: Mockingbird Lane Press, 2013.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Aerts, Nel. Nel Aerts: The wanderer paintings. [Brussels]: Triangle Books, 2019.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Juan Antonio Cebrián de Miguel. Del aire =: Peri tou aeros. Madrid: J. Pastor, 1998.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Arlt-Aeras, Dietrich. Dietrich Arlt-Aeras: Skulpturen, Objekte, Bilder, Zeichnungen. Berlin: Kunstamt Berlin-Tempelhof, 1988.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Capitoli di libri sul tema "AERPs"

1

Azimova, Shakhnoza S., e Anna I. Glushenkova. "Diplotaxis aeris (Forsk.) Boiss." In Lipids, Lipophilic Components and Essential Oils from Plant Sources, 223. London: Springer London, 2012. http://dx.doi.org/10.1007/978-0-85729-323-7_701.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Chovanec, Michal, Lukáš Čechovič e Lukáš Mandák. "Aeris—Robots Laboratory with Dynamic Environment". In Robotics in Education, 169–80. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42975-5_16.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Abeywickrama, Dhaminda B., James Wilson, Suet Lee, Greg Chance, Peter D. Winter, Arianna Manzini, Ibrahim Habli, Shane Windsor, Sabine Hauert e Kerstin Eder. "AERoS: Assurance of Emergent Behaviour in Autonomous Robotic Swarms". In Computer Safety, Reliability, and Security. SAFECOMP 2023 Workshops, 341–54. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-40953-0_28.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Dion, Guillaume, Yves Prévost e Justine Arsenault-Savard. "Aeris – Copper Ladle Metallurgy at the Horne Smelter: A Sustainable Modernization". In Proceedings of the 63rd Conference of Metallurgists, COM 2024, 223–30. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-67398-6_41.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Martino, Rodrigo. "Other Life-Threatening Infections". In The EBMT Handbook, 345–54. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-44080-9_39.

Testo completo
Abstract (sommario):
AbstractToxoplasma gondii is a protozoan that commonly infects animals and birds. Primary T. gondii infection in humans and other mammals is usually asymptomatic but leads to lifelong latent infection. Transmission to humans occurs by ingesting tissue cysts from undercooked meat or oocysts (released in the feces of cats). Latent cysts can give rise during immunosuppression to a severe localized reactivation producing, for example, toxoplasma encephalitis or chorioretinitis, with dissemination being common (Martino, et al.Clin Infect Dis 2000;31:1188–95; Martino et al. Clin Infect Dis 2005;40:67–78; Tomblyn et al., Biol Blood Marrow Transplant 2009;15:1143–23; Martino, et al., Clin Infect Dis 1996;23:419–20.).Very detailed guidelines for the management and diagnosis of toxoplasmosis following HCT have been recently finalized for the European Conference of Infections in Leukemia 9th Meeting (ECIL-9) conference and are being considered for publication as of June 2023 (Aerts et al., Under peer-review, 2023).
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Freye, Enno. "Auditory Evoked Potentials (AEPs) and Brainstem Auditory Evoked Responses (BAER or BAEP)". In Cerebral Monitoring in the Operating Room and the Intensive Care Unit, 145–50. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-1886-3_15.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Lytaev, Sergey, Mikhail Aleksandrov e Aleksei Ulitin. "Psychophysiological and Intraoperative AEPs and SEPs Monitoring for Perception, Attention and Cognition". In Communications in Computer and Information Science, 229–36. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58750-9_33.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Islam, Md Nahidul, Norizam Sulaiman, Mamunur Rashid, Mahfuzah Mustafa e Md Jahid Hasan. "Auditory Evoked Potentials (AEPs) Response Classification: A Fast Fourier Transform (FFT) and Support Vector Machine (SVM) Approach". In Lecture Notes in Electrical Engineering, 539–49. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2406-3_41.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Kobe, Rainer. "Konfessionalismus im Bild: Der Kupferstich „Der Papst im Lateran“ von Jan van Londerseel nach einem Gemälde von Hendrick Aerts". In Arts, Portraits and Representation in the Reformation Era, 173–94. Göttingen: Vandenhoeck & Ruprecht, 2019. http://dx.doi.org/10.13109/9783666552496.173.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Islam, Md Nahidul, Norizam Sulaiman, Mamunur Rashid, Mahfuzah Mustafa e MohdShawal Jadin. "Investigation of Time-Domain and Frequency-Domain Based Features to Classify the EEG Auditory Evoked Potentials (AEPs) Responses". In Lecture Notes in Electrical Engineering, 497–508. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4597-3_45.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "AERPs"

1

Cheng, Baofeng, Kenneth Brentner, Yiqiang Han, Jose Palacios e Philip Morris. "Quantification of Rotor Surface Roughness due to Ice Accretion via Broadband Noise Measurement". In Vertical Flight Society 70th Annual Forum & Technology Display, 1–13. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9411.

Testo completo
Abstract (sommario):
The change of rotor broadband noise due to different surface roughness heights is investigated. The goal of the present work is to quantify the surface roughness at the early stage of helicopter rotor ice accretion through acoustic measurement. Proof-of-concept measurements have been performed in the Adverse Environment Rotor Test Stand (AERTS) facility at The Pennsylvania State University to explore the effect of different surface roughness heights on rotor broadband noise. First, sand paper with different grit sizes is applied to the leading edge of the blade to represent different surface roughness at different ice accretion times. The measured broadband noise, in the frequency bandwidth region ranging from 10 kHz to 24 kHz, is separated by at least 2dB due to due to different sand paper grit sizes. This demonstrates the feasibility of quantifying surface roughness through acoustic measurements. Comprehensive broadband noise measurements based on different accreted ice roughness are then conducted to form the data base from which a correlation between the ice-induced surface roughness and the broadband noise level is developed. Two parameters, the arithmetic average roughness height, Ra , and the averaged roughness height, based on the integrated ice thickness at the blade tip, are introduced to describe the ice-induced surface roughness at the early stage of the ice accretion. The ice roughness measurements are correlated to the measured broadband noise level. Strong correlations (absolute mean deviations of 9.3% and 11.2% for correlation using Ra and the averaged roughness height separately) between the ice roughness and the broadband noise level are obtained, which can be used as an early ice accretion detection tool for helicopters, as well as to quantify the ice-induced roughness at the early stage of rotor ice accretion.
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Yue, Jinshan, Yongpan Liu, Fang Su, Shuangchen Li, Zhe Yuan, Zhibo Wang, Wenyu Sun, Xueqing Li e Huazhong Yang. "AERIS". In ASPDAC '19: 24th Asia and South Pacific Design Automation Conference. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3287624.3287635.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Gul'as, L'ubos, Alena Moravcikova, Eduard Dolny, Matej Talian e Magdalena Ondicova. "Drones for Monitoring of Aeras and Objects". In 2022 New Trends in Aviation Development (NTAD). IEEE, 2022. http://dx.doi.org/10.1109/ntad57912.2022.10013526.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Stackhouse, Richard V., e Zuomin Dong. "Development of Electric Bicycle Performance Testing Techniques and Adaptable Electric Bicycle Power System". In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35555.

Testo completo
Abstract (sommario):
Battery powered electric bicycles and scooters, replacing the heavily polluting scooters with two-cycle internal combustion engines, provide zero-emission transportation for many parts of the world. Annual global sales of electric bicycles have risen from 36,000 in 1993 to over 500,000 in 1999 and to multi-millions today. To facilitate the development of new electric bicycles, a computerized electric bicycle testing facility has been created. Standardized testing cycles for quantitatively measuring the performance of electric bicycles have been developed. Testing results of three representative electric bicycles using the newly introduced electric bicycle testing methods and testing facility are presented. The development of a low-cost, fully Adaptable Electric Bicycle Power System (AEBPS) designed to be quickly adapted to a regular bicycle is also presented. The AEBPS can be attached to a regular bicycle in less than ten minutes, and removed in under five minutes. Performance of a converted bicycle using the AEBPS is evaluated and compared with representative commercial electric bicycles. The work forms the foundation for systematically evaluating different electric bicycle designs and for carrying out design optimization of electric bicycle power systems suitable to different markets and needs.
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Chochul, M., e P. Sevcik. "Optical communication system for a robot in project Aeris". In 2021 19th International Conference on Emerging eLearning Technologies and Applications (ICETA). IEEE, 2021. http://dx.doi.org/10.1109/iceta54173.2021.9726561.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Taura, Hiroo, Toshihiko Takaki, Masahiro Kawaguchi, Satoru Kaneko e Takahisa Kato. "The Effect of Thin Lubricant Films on Acoustic Emission Characteristics". In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64256.

Testo completo
Abstract (sommario):
This paper shows the effect of ultrathin lubricant films between sliding bodies on Acoustic Emission (AE) signals induced by the sliding friction. Experiments were conducted with a ball-on-disk friction tester to measure the friction coefficient, the raw AE signals and the root-mean-squarevalues of the AE signals (the AErms signals). The ball was a glass ball of 5mm diameter. The disk was a magnetic disk used for 2.5 inch HDD with a DLC protective layer on its surface, and was coated with PFPE Z-dol 4000 about 1.5nm thick. The AErms signals kept a low level for some time after the start of the test, and then increased. Its time variation was similar to that of friction coefficient. After the friction test, the circumferential distribution of the lubricant film thickness was measured with an ellipsometer. The distribution demonstrated the reduction of the lubricant film thickness at the circumferential position where the magnitude of AE signals became large. These facts showed that the AE signals correlated well with the lubricant film thickness.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Gowri, S., Bryan K. A. Ngoi e K. Ramesh. "Study on Acoustic Emission During High-Speed Grinding and Ultraprecision Grinding of Advanced Ceramics". In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0748.

Testo completo
Abstract (sommario):
Abstract The process of grinding produces characteristic acoustic emissions (AE) and the signals of AE could be used as ‘condition monitoring’ tool to understand the phenomenon involved in material removal. It has been observed that high-speed grinding of the ceramics improved machining productivity without deteriorating the surface quality of the ceramics, which is not common in the case of metals. Residual stress analysis on the machined ceramics indicated that built-in residual stress might have reduced the crack-formation. Critical grinding conditions limiting the formation of cracks on the ceramics were identified. The trend in AErms signals could be correlated to the grinding force and the grinding conditions. In case of ultraprecision machining, the ductile regime grinding of the ceramics was found out in terms of feed and depth of grinding with grinding velocity. Analysis with the SEM of machined ceramic surfaces and the AErms could reveal the occurrence of ductile regime grinding and also the transition of ductile to conventional brittle mode of material removal during grinding.
Gli stili APA, Harvard, Vancouver, ISO e altri
8

De Bianchi, Massimiliano Sassoli. "ON AERTS’ OVERLOOKED SOLUTION TO THE EINSTEIN-PODOLSKY-ROSEN PARADOX". In II International Workshop on Quantum Mechanics and Quantum Information. Physical, Philosophical and Logical Approaches. WORLD SCIENTIFIC, 2018. http://dx.doi.org/10.1142/9789813276895_0010.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Addamani, Rudreshi, e Holalu Venkatadasu Ravindra. "Weld Bead Performance Assessment of P-GMAW Using Acoustic Emission (AE) Signals Through NDT Methods for MS ASTM A 106 B Grade Material". In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11208.

Testo completo
Abstract (sommario):
Abstract Pulsed Gas Metal Arc Welding (P-GMAW) process is used in many industries to gain high quality, productivity and cost effective products in fabrication of welded joints. The input process parameters will affect the quality, productivity and cost of the welding and are considered to be the most important factors. P-GMAW is an excellent alternative to constant voltage GMAW process for those industries which are looking to boost efficiencies since the process helps to improve quality of welds over varying operator’s skills. The process enables low mean current and low net heat input with stable spray transfer. To produce a very precise control of the arc, P-GMAW applies waveform control logic through a broad wire feed and speed range. In order to understand and control the P-GMAW welding process, it is necessary to determine the input and output relationship parameters. The process is modified spray transfer in which the power source switches between low background current or voltage and a high peak current or voltage between 30 to 400 times per second. Over this period, the peak current pinches off droplets of wire and drive it to the welded joints. By the mean time, background current maintains the arc but produces low heat input that metal transfer cannot occur allowing weld pool to solidify. The process enables low mean current and low net heat input with stable spray transfer. The objective of the present study is to assess the weld bead performance and joint strength by carrying out the destructive testing using AE signals. Experiments have been conducted on MS ASTM A 106 material using 1.2 mm copper coated filler wire based on the Taguchi’s L27 standard orthogonal array. Input parameters considered to carry out the experiments are current, gas flow rate and wire feed rate with a constant speed. The direct response parameters are Ultimate Tensile Strength (UTS, N/mm2), Yield strength (YS, N/mm2) and % of elongation. Indirect response parameters signals are Viz., Acoustic Emission (AE) signals such as welding AERMS, welding AEENERGY, tensile AERMS and tensile AEENERGY are considered to assess the performance of the weld bead joint. From the obtained results, it is clearly observed that a good relationship exists between welding AERMS welding AEENERGY with tensile AERMS and tensile AEENERGY to evaluate the performance of the weld bead joint. The results are validated through carrying out different NDT testing methods on weld bead joint Viz., macro test examination, X–radiography, scanning electron microscope images to analyse external and internal defects in the welded joints. EDX investigation is performed for elemental composition on welded joint in different zones.
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Addamani, Rudreshi, Holalu Venkatdas Ravindra, S. K. Gayathri Devi e Ugrasen Gonchikar. "Assessment of Weld Bead Performance for Pulsed Gas Metal Arc Welding (P-GMAW) Using Acoustic Emission (AE) and Machine Vision (MV) Signals Through NDT Methods for SS 304 Material". In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23438.

Testo completo
Abstract (sommario):
Abstract To gain high cost effective products along with quality and productivity, Pulsed Gas Metal Arc Welding (P-GMAW) process is used in many highly developed industries for fabrication of welded joints. The input parameters are the most important factors which affects the productivity, quality and cost effective for the welding process. The processes enable low net heat input, stable spray transfer and with low mean current. To enhance efficiencies with constant voltage GMAW process, P-GMAW is an outstanding substitute for those industries which are looking to improve quality of welds since the process helps over varying operator’s skills. It is essential to determine the input/output relationship parameters, in order to recognize and control the P-GMAW welding process. P-GMAW applies waveform control logic to fabricate a very precise control of the arc during speed range and a broad wire feed. The power source switches between low background current and a high peak current between 30 to 400 times per second to obtain modified spray transfer process. The peak current pinches off wire droplets and drive it to the welded joints over this period. The process produces low heat input allowing weld pool to solidify, that metal transfer cannot occur but by the mean time, background current maintains the arc with stable spray transfer. Trials have been conducted on SS 304 material using copper coated filler wire of size 1.4 mm based on the Taguchi’s L27 standard orthogonal array. Current, Gas Flow Rate (GFR) and Wire Feed Rate (WFR) with a constant speed are the input parameters considered to carry out trials. The output parameters are Yield strength (YS, N/mm2), percentage of elongation and Ultimate Tensile Strength (UTS, N/mm2). Indirect response parameters are Viz., AE signals such as welding AERMS, welding AEENERGY, tensile AERMS and tensile AEENERGY along with MV signals like area and height of the weld bead are considered to assess the performance of the weld bead joint. It is clearly observed from the obtained results that an excellent relationship exists between welding AERMS welding AEENERGY with tensile AERMS and tensile AEENERGY along with MV signals which were taken at the time of tensile test to evaluate the performance of the weld bead joint. Verification of the results are carried out through performing different NDT testing methods on weld bead joint Viz., X–radiography, Scanning Electron Microscope (SEM) images to analyse external defects in the welded joints. On different zones of welded joint, Energy dispersive analysis (EDX) examination is carried out for elemental composition.
Gli stili APA, Harvard, Vancouver, ISO e altri

Rapporti di organizzazioni sul tema "AERPs"

1

Bosler, Peter Andrew, Steven W. Bova, Irina P. Demeshko, Jeffrey A. Fike, Oksana Guba, James R. Overfelt, Erika Louise Roesler et al. The Aeras Next Generation Global Atmosphere Model. Office of Scientific and Technical Information (OSTI), settembre 2016. http://dx.doi.org/10.2172/1562816.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Watkins, Jerry, e Irina Kalashnikova Tezaur. Performance Portability of the Aeras Atmosphere Model to Next Generation Architectures using Kokkos. Office of Scientific and Technical Information (OSTI), ottobre 2016. http://dx.doi.org/10.2172/1563064.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Nunneley, Sarah A., e Roberta L. Russell. Aircrew Eye/Respiratory Protection (AERP): 16-Hour Extended Wear Evaluation of Chemical Protective Equipment. Fort Belvoir, VA: Defense Technical Information Center, febbraio 1994. http://dx.doi.org/10.21236/ada277288.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Larbi, Jelian. Form to Assess Result Reproducibility of Manuscripts. American Society of Civil Engineers, ottobre 2024. http://dx.doi.org/10.1061/reprod.000001.

Testo completo
Abstract (sommario):
Use this worksheet to assess the: (a) availability of manuscript data, models, code, directions, and other digital artifacts; and (b) reproducibility of figures, tables, and other results presented in the manuscript. Should you answer “no” or “not sure” to any question, skip to Section IV and then answer the final questions to provide the authors constructive feedback to improve their repository and materials. The Journal asks that AERs and reproducibility reviewers take no more than four hours to assess the reproducibility of a manuscript’s results. Should an assessment take longer, skip to Section IV and provide the authors feedback on the steps that took a long time and how the authors can better organize their repository and materials to reduce the time to assess result reproducibility.
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Over, Thomas, Mackenzie Marti, Padraic O’Shea e Jennifer Sharpe. Estimating Peak-Flow Quantiles for Selected Annual Exceedance Probabilities in Illinois. Illinois Center for Transportation, settembre 2023. http://dx.doi.org/10.36501/0197-9191/23-019.

Testo completo
Abstract (sommario):
This report presents the methods, results, and applications of an updated flood-frequency study for the State of Illinois. This study, which uses data through September 2017, updates two previous studies that used data through 1999 and 2009, respectively. Flood-frequency estimates are used for a variety of land-use planning and infrastructure design purposes, including for the hydraulic design of bridges. The flood frequencies presented are the stream discharges (or quantiles) that are exceeded each year with a given probability, called the annual exceedance probability (AEP). Estimates are provided for eight AEPs: 0.5, 0.2, 0.1, 0.04, 0.02, 0.01, 0.005, and 0.002. The basic data used are the annual maximum discharges (peak flows) at streamgages in and near Illinois and the measurable physical properties (basin characteristics) of the basins upstream from those streamgages. The logarithms of the peak-flow records at qualifying streamgages were fit to the Pearson Type 3 distribution using federally recommended methods, providing one of the two primary products of the study, which is the set of peak-flow quantiles at the streamgages and their uncertainties. The other primary product is sets of equations, determined by least-squares regression, that relate the peak-flow quantiles and the basin characteristics. There is one set of equations for each of Illinois’ seven hydrologic regions, and, for each region, one equation for each AEP. These regional equations allow the estimation of peak-flow quantiles at ungaged locations throughout the state and their uncertainties. A set of illustrative example applications is provided, and tables of all results at all study streamgages and regions are provided in associated data releases. The study results are also being made available in a web application, StreamStats.
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Over, Thomas, Riki Saito, Andrea Veilleux, Padraic O’Shea, Jennifer Sharpe, David Soong e Audrey Ishii. Estimation of Peak Discharge Quantiles for Selected Annual Exceedance Probabilities in Northeastern Illinois. Illinois Center for Transportation, giugno 2016. http://dx.doi.org/10.36501/0197-9191/16-014.

Testo completo
Abstract (sommario):
This report provides two sets of equations for estimating peak discharge quantiles at annual exceedance probabilities (AEPs) of 0.50, 0.20, 0.10, 0.04, 0.02, 0.01, 0.005, and 0.002 (recurrence intervals of 2, 5, 10, 25, 50, 100, 200, and 500 years, respectively) for watersheds in Illinois based on annual maximum peak discharge data from 117 watersheds in and near northeastern Illinois. One set of equations was developed through a temporal analysis with a two-step least squares-quantile regression technique that measures the average effect of changes in the urbanization of the watersheds used in the study. The resulting equations can be used to adjust rural peak discharge quantiles for the effect of urbanization, and in this study the equations also were used to adjust the annual maximum peak discharges from the study watersheds to 2010 urbanization conditions. The other set of equations was developed by a spatial analysis. This analysis used generalized least-squares regression to fit the peak discharge quantiles computed from the urbanization-adjusted annual maximum peak discharges from the study watersheds to drainage-basin characteristics. The peak discharge quantiles were computed by using the Expected Moments Algorithm following the removal of potentially influential low floods defined by a multiple Grubbs-Beck test. To improve the quantile estimates, regional skew coefficients were obtained from a newly developed regional skew model in which the skew increases with the urbanized land use fraction. The skew coefficient values for each streamgage were then computed as the variance-weighted average of at-site and regional skew coefficients. The drainage-basin characteristics used as explanatory variables in the spatial analysis include drainage area, the fraction of developed land, the fraction of land with poorly drained soils or likely water, and the basin slope estimated as the ratio of the basin relief to basin perimeter. This report also provides: (1) examples to illustrate the use of the spatial and urbanization-adjustment equations for estimating peak discharge quantiles at ungaged sites and to improve flood-quantile estimates at and near a gaged site; (2) the urbanization-adjusted annual maximum peak discharges and peak discharge quantile estimates at streamgages from 181 watersheds including the 117 study watersheds and 64 additional watersheds in the study region that were originally considered for use in the study but later deemed to be redundant. The urbanization-adjustment equations, spatial regression equations, and peak discharge quantile estimates developed in this study will be made available in the web-based application StreamStats, which provides automated regression-equation solutions for user-selected stream locations. Figures and tables comparing the observed and urbanization-adjusted peak discharge records by streamgage are provided at http://dx.doi.org/10.3133/sir20165050 for download.
Gli stili APA, Harvard, Vancouver, ISO e altri
Ti possono interessare anche gli elenchi estesi di opere sul tema "AERPs":
Articoli di riviste Tesi Libri
Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!

Vai alla bibliografia