Search results for "Interferences"
showing 7 items of 7 documents
Two-wave interferences space-time duality: Young slits, Fresnel biprism and Billet bilens
2017
International audience; Taking advantage of the analogy that can be drawn between the spatial and temporal propagations, we explore two-wave temporal interference in textbook cases such as Young's double slits, Fresnel's biprism and Billet's bilens. We illustrate our approach by numerical simulations for short pulses propagating in dispersive optical fibers with parameters typical of those found in modern optical telecommunications.
IEEE Access Special Section Editorial: Exploiting the Benefits of Interference in Wireless Networks: Energy Harvesting and Security
2018
Interference used to be viewed as a harmful factor in wireless networks, which can reduce the quality of information transmission. To combat against interference, many interference management techniques have emerged. Due to the latest research advances, interference (or noise) can also be exploited to offer some benefits to wireless networks. The first aspect is that interference in multi-user networks can be collected as a green power supply for the transceivers, known as wireless energy harvesting. Another application is that one can generate artificial noise to disrupt the adversarial eavesdropping, and guarantee the security of wireless networks. Therefore, conventional interference man…
Valodu kontakti Latīņamerikā: Portuñol fenomens
2022
Maģistra darbs „Valodu kontakti Latīņamerikā: portuñol fenomens” ir veltīts divu romāņu valodu, spāņu un portugāļu, savstarpējām valodu saskarsmes sekām Latīņamerikas pierobežas valstīs. Darba mērķis ir noteikt portuñol galvenās īpašības, kā arī tā attīstības perspektīvas. Empīriskajā darba daļā tiek analizēta trīs dažādu autoru literārā daiļrade, lai raksturotu un aprakstītu portuñol lingvistiskās īpatnības. Darba secinājumos tiek aizstāvēta portuñol etnolingvistiskā dzīvotspēja, tā attīstības perspektīvas nākotnē un tā kultūrvēsturiskā nozīme pierobežas identitātes jautājumos. Portuñol trūkst sistemātisku valodas iezīmju, tomēr šis fenomens atspoguļo pierobežu valodu īpašību izpausmes, ku…
Characterization of Different Cable Ferrite Materials to Reduce the Electromagnetic Noise in the 2–150 kHz Frequency Range
2018
The gap of standardization for conducted and field coupled electromagnetic interferences (EMI) in the 2–150 kHz frequency range can lead to Electromagnetic Compatibility (EMC) problems. This is caused by power systems such as Pulse Width Modulation (PWM) controlled rectifiers, photovoltaic inverters or charging battery units in electric vehicles. This is a very important frequency spectral due to interferences generated in a wide range of devices and, specifically, communication problems in the new technologies and devices incorporated to the traditional grid to convert it into a Smart Grid. Consequently, it is necessary to provide new solutions to attenuate this kind of interference, which…
Uztura un fizikālo procedūru ietekme uz asaru kvantitāti un kvalitāti
2020
Maģistra darbs uzrakstīts latviešu valodā, datorsalikumā uz 56 lapaspusēm. Tas satur 30 attēlus, 3 tabulas, 2 pielikumus, 63 atsauces uz literatūras avotiem. Darba mērķis: Novērtēt Omega 3 kapsulu lietošanu, pietiekoša ūdens dzeršanas un komprešu lietošanu uz acs asaru plēves veselību. Metode: Pētījumā piedalījās trīsdesmit dalībnieki. Pētījums tika realizēts piecos posmos. Pirmajā posmā tiek izmantotas McMonnies un OSDI sausās acs izvērtēšanas anketas. Otrajā posmā pacienti tiek sadalīti trīs grupās un tiek veikta acs asaru plēves izvērtēšana. Asaru plēves kvalitātes novērtēšanas testi ir interferences ainas pakāpes novērtēšana un TBUT. Asaru plēves kvantitātes novērtēšanas testi ir asaru …
Ultra-high-pressure liquid chromatography tandem mass spectrometry method for the determination of 9 organophosphate flame retardants in water samples
2016
Few methods are available for comprehensive organophosphate flame retardants (PFRs) detection in water and wastewater. Gas chromatography has been employed previously, but this approach is less selective, not amenable for use with deuterated standards and can suffer unfavorable fragmentation. Ultra-high-pressure liquid chromatography tandem mass spectrometry (UHPLC-QqQ-MS/MS) has become the most promising platform, already applied successfully for analysis of selected PFRs in some environmental matrices like water and wastewater. However, the presence of some interferences from the dissolvent, the equipment and the used materials should be taken into account. The procedure involves: The fir…
Potoczność naznaczona stylem nowych mediów. Interferencje międzystylowe w wypowiedziach pisemnych uczniów jako problem edukacyjny
2022
The article discusses the phenomenon of new media discourse permeating the language of written assignments produced in official school situations. The analysis of pupils’ essays concentrates on the colloquialisms transferred from social media discourse into the lexical layer of school writing. The author has assumed that the analysis will enable identifying educational barriers experienced by the new generation of pupils. The language of the texts under analysis combines the styles of written assignments, informal speech and of socialmedia discourse.