Search results for "HZ"

Appearance and use of Roman roofing materials in the region of the Aedui and Lingones

2014

Römische Konstruktionstechniken und Baustoffe können als Anzeichen für Romanisierung gewertet werden. Sie legenZeugnis von den veränderten Verhaltensweisen ab, wie die Haeduer und die Lingonen mit den natürlichen Ressourcenumgingen, um diese Materialien zu produzieren. Es können deutliche Unterschiede zwischen diesen beiden gallischenStämmen hinsichtlich des Einsatzes von Ziegel- und Steindächern beobachtet werden. Die Haeduer verwenden meistensZiegel für ihre Dächer, selbst wenn die lokal verfügbaren natürlichen Ressourcen eine Produktion dieses Baustoffesnicht erlauben. Im Gegensatz dazu kommen bei den Lingonen Ziegel nur dann zum Einsatz, wenn die entsprechendenRessourcen vorhanden …

Intraoral soft tissue lipomas: clinicopathological features from 91 cases diagnosed in a single Oral Pathology service.

2020

Background intraoral soft tissue lipomas are relatively uncommon mesenchymal neoplasms. Few papers have been published comparing the clinicopathological features of these tumors in different populations. The aim of the present study was to analyze the clinicopathological features from intraoral soft tissue lipomas diagnosed in a Brazilian population. Material and Methods all cases diagnosed as intraoral soft tissue lipomas in an Oral Pathology laboratory from 2005 to 2019 were retrieved and descriptively analyzed; statistical analysis was performed for comparison of the clinical and demographic parameters. Results 91 intraoral lipomas were retrieved, including 56 lipomas, 30 fibrolipomas, 2…

Exact Reconstruction of Sub-wavelength THz Source Profile via Combination of Knife-edge Technique and Time-domain Spectroscopy

2013

Wykorzystanie stopu Ni-Co jako katalizatora katody w jednokomorowym mikrobiologicznym ogniwie paliwowym

2017

Technologią, która wykorzystuje ścieki jako surowiec, zapewniając jednocześnie ich oczyszczanie oraz produkcję prądu, jest technologia mikrobiologicznych ogniw paliwowych. Technologia ta postrzegana jest jako wspomaganie tradycyjnego oczyszczania ścieków. Jednym z podstawowych problemów związanych z mikrobiologicznymi ogniwami paliwowymi jest niewielka ilość produkowanej energii elektrycznej. Gęstość prądu zależy od szybkości zarówno reakcji anodowych, jak i katodowych. Celem pracy było wykazanie możliwości wykorzystania stopu Ni-Co jako katalizatora elektrody tlenowej w jednokomorowym mikrobiologicznym ogniwie paliwowym. Badania objęły pomiary szybkości rozkładu H2O2 na analizowanym katali…

Strongly Coupled Coherent Phonons in Single-Layer MoS 2

2019

We present a transient absorption setup combining broadband detection over the visible-UV range with high temporal resolution ($\sim$20fs) which is ideally suited to trigger and detect vibrational coherences in different classes of materials. We generate and detect coherent phonons (CPs) in single layer (1L) MoS$_2$, as a representative semiconducting 1L-transition metal dichalcogenide (TMD), where the confined dynamical interaction between excitons and phonons is unexplored. The coherent oscillatory motion of the out-of-plane $A'_{1}$ phonons, triggered by the ultrashort laser pulses, dynamically modulates the excitonic resonances on a timescale of few tens fs. We observe an enhancement by…

A wideband THz Time Domain Spectroscopy system based on pulsed laser: model and experiments

2014

Cybersecurity Attacks on Software Logic and Error Handling Within ADS-B Implementations: Systematic Testing of Resilience and Countermeasures

2022

Automatic Dependent Surveillance-Broadcast (ADS-B) is a cornerstone of the next-generation digital sky and is now mandated in several countries. However, there have been many reports of serious security vulnerabilities in the ADS-B architecture. In this paper, we demonstrate and evaluate the impact of multiple cyberattacks on ADS-B via remote radio frequency links that affected various network, processing, and display subsystems used within the ADS-B ecosystem. Overall we implemented and tested 12 cyberattacks on ADS-B in a controlled environment, out of which 5 attacks were presented or implemented for the first time. For all these attacks, we developed a unique testbed that consisted of 1…