Vehicular networks are a very promising technology to increase traffic safety and efficiency, enable numerous other applications in the domain of vehicular communication. Proposed for VANETs have diverse properties often require nonstandard communication protocols. Moreover, dynamics network due vehicle movement further complicates design an appropriate comprehensive system. In this article we collect categorize envisioned from various sources classify unique characteristics networks. Based...

Methylammonium lead bromide (MAPbBr3) perovskite nanoparticles (NPs) have been recently proposed as a new material for light-emitting diodes, well paradigm to elucidate the operational mechanism in solar cells. Here, we expanded synthesis concept fabricate NPs based on formamidinium (FAPbBr3). Importantly, demonstrated that photophysical features of this novel can be easily tuned by exchanging organic cation, achieving lower radiative bimolecular recombination rate FAPbBr3 NPs. Additionally,...

This study presents the influence of various substituents on photophysical features heteroleptic copper(I) complexes bearing both N-heterocyclic carbene (NHC) and dipyridylamine (dpa = skeleton corresponding to ligand L1) ligands. The luminescent properties have been compared our recently reported archetypal blue emitting [Cu(IPr)(dpa)][PF6] complex. choice ligands has guided explore effect electron donor/acceptor "push–pull" emission wavelengths photoluminescence quantum yields. A selection...

A new copper(<sc>i</sc>) complex, which lacks of charge transfer character in the excited state, features a blue fluorescence and yellow phosphorescence photo- electro-responses, respectively.

In this paper, we address the dynamic ridematching problem with time windows in ridesharing. The ridesharing is a special type of where participants form on short notice. to assign riders drivers and define ordering timing riders' pickup delivery. Because not all information known advance, dynamic. This an optimization optimize multicriteria objective function. We consider minimizing total travel distance maximizing number transported riders.

This work demonstrates a novel proof‐of‐concept to implement pentacene derivatives as emitters for the third generation of light‐emitting electrochemical cells based on small‐molecules (SM‐LECs). Here, straightforward procedure is shown control chromaticity pentacene‐based lighting devices by means photoinduced cycloaddition process 6,13‐bis(triisopropylsilylethynyl) (TIPS)‐pentacene that leads formation anthracene‐core dimeric species featuring high‐energy emission. Without using procedure,...

Abstract Recently, the use of a new family electroluminescent copper(I) complexes—i.e., archetypal [Cu(IPr)(3‐Medpa)][PF 6 ] complex; IPr: 1,3‐bis‐(2,6‐di‐iso‐propylphenyl)imidazole‐2‐ylidene; 3‐Medpa: 2,2′‐bis‐(3‐methylpyridyl)amine—has led to blue light‐emitting electrochemical cells (LECs) featuring luminances 20 cd m −2 , stabilities 4 mJ, and efficiencies 0.17 A −1 . Herein, this study rationalizes how enhance these figures‐of‐merit optimizing both device fabrication design. On one...

Abstract The synthesis and characterization, as well photoluminescent electrochemical features of a series ionic copper(I) complexes—, i.e., [Cu(N ^ N)(P P)] + , where N is 4,4′‐diethylester‐2,2′‐biquinoline (dcbq) P bis‐triphenylphosphine, bis[2‐(diphenylphosphino)phenyl)ether] (POP), or 4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene (Xantphos)—are reported along with their application to achieve both deep‐red white light‐emitting cells (LECs). In short, the first Cu(I)‐based LECs...

The increasing ubiquity of mobile handheld devices paved the way for dynamic ridesharing which could save travel cost and reduce environmental pollution. ridematching problem with time windows in considers matching drivers riders similar routes (with detour flexibility) schedules on short notice. This is hard to solve. In this work, we model as an optimization propose a genetic algorithm solve it. We consider minimizing total distance (vehicles) maximizing number matches. addition, provide...

The syntheses, as well the photophysical and electrochemical characterization, of two novel BODIPY-porphyrin dyads their first application in lighting schemes are provided. benefits ascribed to unique features, namely (i) a good electronic alignment, (ii) remarkable efficient energy transfer, (iii) excellent film morphology, lead deep-red devices with stabilities around 1000 h efficiencies 0.13 Lm W(-1).

This work studies the effect of σ-Hammett parameter (σp) - i.e., σ-donation caused by substitution at para position a bipyridine ligand (4,4'-R2bipy, where R is MeO, Me, H, NO2) on both photo- and electro-luminescence features series heteroleptic copper(i) complexes [Cu(N^N)(P^P)]+ N^N P^P ligands are R2bipy Xantphos, respectively. By virtue comprehensive photophysical, theoretical, thin-film lighting device light-emitting electrochemical cells (LECs) investigation, we note clear...

The differences in the electroluminescence (EL) of red‐emitting free‐base ( H2TPP ) and Zn‐metalated ZnTPP archetypal porphyrins are rationalized light‐emitting electrochemical cells by means an electric‐field dependent effect, leading to whitish reddish devices, respectively. Although shows superior photophysical features compared , devices prepared with surprisingly stand out a deep‐red EL similar its photoluminescence (PL), while feature unexpected EL. Standard arguments such as...

We report on the benefits of changing bridging group X bis-pyridyl ligands, that is, Py-X-Py where is NH, CH2 , C(CH3 )2 or PPh, photo- and electroluminescent properties a new family luminescent cationic H-heterocyclic carbene (NHC) copper(I) complexes. A joint experimental theoretical study demonstrates affects molecular conformation from planar-like structure (X NH ) to boat-like PPh), leading i) four-fold enhancement photoluminescence quantum yield (ϕem without affecting thermally...

The syntheses, the photophysical/electrochemical characterization, and first application in LECs of different metallated porphyrins are provided.

Innovative ways to use ad hoc networking between vehicles are an active research topic and numerous proposals have been made for applications that make of it. Due the bandwidth-limited wireless communication medium, scalability is one crucial factor success these future protocols. Data aggregation solution accomplish such scalability. The goal semantically combine information only disseminate this combined in larger regions. However, integrity aggregated cannot be easily verified anymore....

The multiobjective route planning problem in dynamic multi-hop ridesharing is considered to be NP-complete. Evolutionary computation has received a growing interest solving the hard optimization problems. In this study we investigate behavior of different variants ant colony based approach for and compare performance with genetic algorithm recommended problem. Experimentation results indicate that encounters poor its native form competes some when combined local search.

Ridesharing is considered as one of the promising solutions for dropping consumption fuel and reducing congestion in urban cities, hence environmental pollution. Route planning a key component success ridesharing systems which multiple objectives can be optimized. The multiobjective route problem multi hop categorized NP-complete. Multiobjective evolutionary algorithms have received growing interest solving optimization problems. In this work, we compare behaviour different evolution ary...

Mechanisms for information dissemination are essential many applications in vehicular ad-hoc networks (VANETs). Currently, simple flooding is often supposed to broadcast within a geographic region, as example geocast protocols. However, has several drawbacks: every node rebroadcasting message leads redundancy, contention, and collision, which referred the storm problem. Hence, order fulfill applications' requirements, more efficient solutions necessary. In this work we introduce three...

Abstract Zur Nachrechnung bestehender Bauwerke, welche grundsätzlich auf Basis der aktuellen, bauaufsichtlich eingeführten technischen Baubestimmungen zu führen sind, werden charakteristische Materialkennwerte verwendeten Baustoffe benötigt. Diese können zumindest im Rahmen einer Vordimensionierung durch Umrechnung von aus Herstellzeit dokumentierten mechanischen Materialkennwerten Größen, wie sie zur Anwendung benötigt werden, ermittelt [ 1 ]. Für eine abgesicherte hingegen müssen...

Abstract Die zuverlässigkeitsbasierte Nachrechnung bestehender Tragwerke kann auf Basis verschiedener wissenschaftlicher Verfahren erfolgen. Da jedoch bisher nur wenige mit den Eurocodes kompatible für eine praxisgerechte Anwendung existieren, kommen die meist semiprobabilistische und Teilsicherheitsbeiwerte zur Anwendung, wie sie auch Bemessung von Neubauwerken verwendet werden. Eine solche Beurteilung bzw. führt oft zu sehr konservativen Ergebnissen, verbunden aufwendigen kostenintensiven...

Abstract In der in Deutschland für die Bemessung von Stahlbeton‐ und Spannbetontragwerken aktuell bauaufsichtlich eingeführten DIN EN 1992‐1‐1 [1] sind Angaben zur Korrelation zwischen Betondruck‐ Zugfestigkeit enthalten. Diese Regeln beziehen sich jedoch ausschließlich auf im Neubaufall verwendete Betone nach 206‐1 [2]. Aufgrund verschiedener last‐ zeitabhängiger Einflüsse kann Gültigkeit aufgeführten Beziehung Bestandsbetone nicht ohne weitere Überlegungen vorausgesetzt werden. Die...