Stationary mass distribution and nonlocality in models of coalescence and shattering

We study the asymptotic properties of the steady state mass distribution for a class of collision kernels in an aggregation-shattering model in the limit of small shattering probabilities. It is shown that the exponents characterizing the large and small mass asymptotic behavior of the mass distribution depend on whether the collision kernel is local (the aggregation mass flux is essentially generated by collisions between particles of similar masses), or non-local (collision between particles of widely different masses give the main contribution to the mass flux). We show that the non-local regime is further divided into two sub-regimes corresponding to weak and strong non-locality. We also observe that at the boundaries between the local and non-local regimes, the mass distribution acquires logarithmic corrections to scaling and calculate these corrections. Exact solutions for special kernels and numerical simulations are used to validate some non-rigorous steps used in the analysis. Our results show that for local kernels, the scaling solutions carry a constant flux of mass due to aggregation, whereas for the non-local case there is a correction to the constant flux exponent. Our results suggest that for general scale-invariant kernels, the universality classes of mass distributions are labeled by two parameters: the homogeneity degree of the kernel and one further number measuring the degree of the non-locality of the kernel.Comment: Published versio

Exhibition Center dengan Pendekatan pada Adaptasi Arsitektur Neo-Vernakular di Kota Surakarta

Exhibition Center adalah sebuah bangunan atau kompleks yang dirancang khusus sebagai tempat untuk mengadakan pameran, pertunjukan, konferensi, dan acara lainnya yang melibatkan perusahaan, industri, atau komunitas tertentu. Exhibition Center ini biasanya memiliki fasilitas yang modern dan lengkap, seperti area pameran, ruang pertemuan, area makan, dan fasilitas teknologi canggih untuk memfasilitasi presentasi dan acara lainnya. Pengunjung Exhibition Center dapat berasal dari berbagai latar belakang, termasuk kalangan bisnis, akademisi, umum, atau bahkan wisatawan. Oleh karena itu, perancangan Exhibition Center harus mempertimbangkan kebutuhan dan preferensi pengunjung yang berbeda. Salah satu tujuan utama dari Exhibition Center adalah untuk memberikan pengalaman yang unik dan berkesan bagi pengunjungnya, serta mempromosikan produk dan jasa dari perusahaan yang terlibat dalam acara tersebut. Dalam merancang Exhibition Center, perlu diperhatikan faktor-faktor seperti tata letak, kapasitas, keamanan, dan efisiensi energi. Perancangan juga harus memperhatikan aspek lingkungan dan sosial, termasuk praktik ramah lingkungan dan aksesibilitas bagi orang yang berkebutuhan khusus. Kesimpulannya, Exhibition Center adalah sebuah bangunan atau kompleks yang dirancang khusus untuk mengadakan berbagai acara seperti pameran, konferensi, dan pertunjukan. Perancangan Exhibition Center harus mempertimbangkan berbagai faktor yang berkaitan dengan fungsinya sebagai pusat pameran dan tempat pertemuan, serta memperhatikan aspek lingkungan dan sosial untuk menciptakan sebuah gedung yang efisien, ramah lingkungan, dan dapat memberikan pengalaman yang unik bagi pengunjungnya. Kata Kunci: Eksibisi; Konferensi; MICE; Arsitektur

Effets d’un stress hydrique intervenu pendant le stade végétatif et la phase de floraison chez le gombo

Cette étude a pour but d’évaluer l’impact du stress hydrique durant le stade végétatif et à la floraison sur la teneur en proline et en chlorophylle de cinq variétés de gombo. Les variations entre les différentes variétés étudiées ont été détectées. Pour cela, des plantes de cinq variétés de gombo sont cultivées sous trois traitements hydriques : une alimentation hydrique continue (T0), une restriction hydrique au stade végétatif (T1) et une restriction hydrique à la floraison (T2) ; durant ces traitements, les teneurs en proline et en chlorophylle ont été mesurées. Le stress hydrique a provoqué une augmentation de la teneur en proline foliaire chez toutes les variétés aussi bien au stade végétatif qu’à la floraison. Par ailleurs, sous l’effet du déficit hydrique aux 2 stades de développement, les cinq variétés réagissent par une augmentation du contenu foliaire en chlorophylle totale. Cependant, le rapport chlorophylle a/chlorophylle b diminue sous l’effet du stress hydrique intervenu à la floraison chez toutes les variétés. Vis-à-vis du stress hydrique au stade végétatif, les variétés UAE 19 et UAE 45 ont un rapport chloropyhlle a/chlorophylle b qui augmente, traduisant ainsi une meilleure tolérance contrairement aux variétés UAE 1, UAE 22 et UAE 40.© 2009 International Formulae Group. All rights reserved.Mots clés : variétés, traitements hydriques, proline, chlorophyll

Pengaruh Motivasi terhadap Minat Mahasiswa Akuntansi Universitas Bina Nusantara Angkatan 2006 untuk Mengikuti Pendidikan Profesi Akuntansi

This study aimed to determined whether motivation affects students of accounting and double programs to determine whether there were differences between the accounting student with double programs to follow PPAk. There are four hypotheses proposed, the first three hypotheses are tested using multiple linear regression method, whereas the fourth hypotheses is tested using independent t-test of the two samples with 95% confidence level (α=0.05). The result of this study have several implications for various parties related to the PPAk. From the findings obtained in this study, the quality and career motivation variables have significant impact on student interest in follow PPAk. But the career variable is the most significant factor affecting student interests to follow PPAk, while the motivation of economic variables does not significantly affect the interest to follow PPAk. In addition, for the last hypothesis there is no differences between student interest in accounting and double program students. This can be caused by accounting student and double programs student have studied multiple courses in accounting subjects of the course provides knowledge about the field

Spatial and temporal variation of malaria entomological parameters at the onset of a hydro-agricultural development in central Côte d'Ivoire

A deeper understanding of the ecology and small-scale heterogeneity of malaria transmission is essential for the design of effective prevention, control and elimination interventions. The spatial and temporal distribution of malaria vectors was investigated in five villages in close proximity to a hydro-agricultural system in Côte d'Ivoire over the course of construction and the early phase of irrigated rice farming.; The study was carried out in five villages (Raffierkro, N'Douakro, Ahougui, Kpokahankro, Koffikro) near Bouaké, central Côte d'Ivoire, between early 2007 and late 2009. In each village, mosquitoes were collected by human landing catches and identified morphologically at genus and species level, and entomological parameters were determined. Plasmodium infection was assessed by dissection and an enzyme-linked immunosorbent assay.; A total of 19,404 mosquitoes belonging to the genus Anopheles were sampled during 328 human-night catches. Before the construction of the hydro-agricultural system, comparable densities of Anopheles gambiae were observed in all villages. In subsequent years, densities in Raffierkro and Ahougui were significantly higher than the other villages [Kruskal-Wallis (KW) test = 31.13, p > 0.001]. The density of Anopheles funestus in the five villages was comparable in the early stage of the project, while a high density was reported in Koffikro at the end (KW test = 11.91, p = 0.018). Transmission of Plasmodium falciparum is perennial in the study area. Over the course of the study, high entomological inoculation rates (EIRs) were found: 219-328 infectious bites per person per year with An. gambiae. For An. funestus considerably lower EIRs were observed (5.7-39.4). Changing patterns of An. gambiae were not correlated with malaria transmission.; In this study setting, located in the bioclimatic transition zone of Côte d'Ivoire, rice cultivation was not observed to increase malaria transmission. The entomological parameters recorded until the onset of rice-growing activities in a hydro-agricultural system presented considerable heterogeneity both in space and time; a strong increase of Anopheles mosquitoes was observed in two of the five villages located in close proximity to the dam and irrigated rice fields. Malaria still is a main public health problem in all villages that require adequate control measures

Signalparameter zur Ortung von HPEM-Quellen

In diesem Beitrag wird anhand von Signalproben untersucht, mit welchen geeigneten Signalparametern die Ortung von aktiven leistungsstarken elektromagnetischen Quellen (sog. HPEM-Quellen) optimal durchgeführt werden kann. Da sich die Positionsberechnung durch die Verarbeitung von Laufzeitdifferenzen ergibt, beschränkt sich die Untersuchung auf die Bestimmung der Laufzeitdifferenzen. Betrachtet werden sowohl Signalausschnitte definierter Länge sowie eindeutig identifizierbare Ereigniszeitpunkte. Im ersten Fall werden aus der Korrelation der Signalausschnitte im Frequenzbereich die Laufzeitdifferenzen bestimmt. Hierbei wird durch Variation der Anzahl der Abtastwerte eines Signalausschnitts die erforderliche Signaldauer ermittelt. Im zweiten Fall werden zuerst aus den direkt erfassten Signaldaten die Einhüllenden gewonnen. Bezüglich eines vordefinierten Referenzwertes werden diese Einhüllenden dann korrigiert. Mit Hilfe eines festgelegten Schwellwertes wird abschließend aus den korrigierten Hüllkurven die Differenz der Ereigniszeitpunkte gebildet und somit die Laufzeitdifferenz im Zeitbereich bestimmt

Spatiotemporal modeling of schistosomiasis in Ghana: linking remote sensing data to infectious disease

More than 90% of the worldwide schistosomiasis burden falls on sub-Saharan Africa. Control efforts are often based on infrequent, small-scale health surveys, which are expensive and logistically difficult to conduct. The use of satellite imagery to predictively model infectious disease transmission has great potential for public health applications. The transmission of schistosomiasis, a disease acquired from contact with contaminated surface water, requires specific environmental conditions to sustain freshwater snails. If a connection between schistosomiasis and remotely sensed environmental variables can be established, then cost effective and current disease risk predictions can be made available. Schistosomiasis transmission has unknown seasonality, and the disease is difficult to study due to a long lag between infection and clinical symptoms. To overcome these challenges, we employed a comprehensive 15-year time-series built from remote sensing feeds, which is the longest environmental dataset to be used in the application of remote sensing to schistosomiasis. The following environmental variables will be used in the model: accumulated precipitation, land surface temperature, vegetative growth indices, and climate zones created from a novel climate regionalization technique. This technique, improves upon the conventional Köppen-Geiger method, which has been the primary climate classification system in use the past 100 years. These predictor variables will be regressed against 8 years of national health data in Ghana, the largest health dataset of its kind to be used in this context, and acquired from freely available satellite imagery data. A benefit of remote sensing processing is that it only requires training and time in terms of resources. The results of a fixed effects model can be used to develop a decision support framework to design treatment schemes and direct scarce resources to areas with the highest risk of infection. This framework can be applied to diseases sensitive to climate or to locations where remote sensing would be better suited than health surveys.Published versio