We report the use of a phenylalkyl side chain modified donor molecule to increase the open-circuit voltage (Voc) of an organic photovoltaic device. The bulky side chain is able to alter the donor/acceptor interface without interfering in the molecular packing. As a result, both Voc and device performance are improved.

The title compound, C(12)H(19)N(2) (+)·Cl(-)·H(2)O, contains a network of 4-(2,3-dimethyl-phen-yl)piperazin-1-ium cations, water mol-ecules and chloride anions. The crystal packing is influenced by O-H⋯Cl, N-H⋯Cl, N-H⋯O, C-H⋯O and C-H⋯Cl hydrogen bonds, resulting in structure with an open-framework architecture.

Recently, Bodur, Del Pia, Dey, Molinaro and Pokutta studied the concept of aggregation cuts for packing covering integer programs. The closure is intersection all cuts. Bodur et al. strength this closure, but left open question whether polyhedral. In paper, we answer in positive, i.e., show that Finally, demonstrate a generalization, k-aggregation also polyhedral k.

Introduction: Controversy remains as to the advantages and disadvantages of pharyngeal packing during septorhinoplasty. Our study investigated the effect of pharyngeal packing on postoperative nausea and vomiting and sore throat following this type of surgery or septorhinoplasty.   Materials and Methods: This clinical trial was performed on 90 American Society of Anesthesiologists (ASA) I or II...

The paper described a generalized integrated glance to bin packing problems including a brief literature survey and some new problem formulations for the cases of multiset estimates of items. A new systemic viewpoint to bin packing problems is suggested: (a) basic element sets (item set, bin set, item subset assigned to bin), (b) binary relation over the sets: relation over item set as compatib...

The crystal structure of the title Schiff base complex is obtained by single-crystal X-ray diffraction data.The solid state structure determination reveals that the coordination geometry around the copper(II) center istetrahedrally distorted square-planar. The crystal packing shows one dimensional infinite chains which arisesfrom the intermolecular interaction and stabilize the crystal packing.

For a given positive integer v with v ≡ 4(mod 6) and v > 4, let CKPD(v) denote a canonical Kirkman packing design of order v. It is proved in this paper that any CKPD(v) can be embedded in a CKPD(u) if u ≡ v ≡ 4 (mod 6), v ≥ 82 and u ≥ 3.5v.

Cardinality constrained bin packing or bin packing with cardinality constraints is a basic bin packing problem. In the online version with the parameter k ≥ 2, items having sizes in (0, 1] associated with them are presented one by one to be packed into unit capacity bins, such that the capacities of bins are not exceeded, and no bin receives more than k items. We resolve the online problem in t...

Abstract In the present work, we investigated effect of geometry open cell foam material on value pressure drop and heat flux. We create models porous media with an ordered (FCC, BCC, SC) disordered (DEM) structure different values porosity: 0.7; 0.75; 0.8. Numerical modeling was carried out in ANSYS Fluent software (v. 19.0) for various air flow velocities. At porosities 0.7 0.75 there is a no...

We survey lower bounds for the variant of the two-dimensional bin packing problem where items cannot be rotated. We prove that the dominance relation claimed by Carlier et al.[5] between their lower bounds and those of Boschetti and Mingozzi [1] is not valid. We analyze the performance of lower bounds from the literature and we provide the results of a computational experiment.