Supertagging-based Parsing with Linear Context-free Rewriting Systems

We present the first supertagging-based parser for linear context-free rewriting systems (LCFRS). It utilizes neural classifiers and outperforms previous LCFRS-based parsers in both accuracy and parsing speed by a wide margin. Our results keep up with the best (general) discontinuous parsers, particularly the scores for discontinuous constituents establish a new state of the art. The heart of our approach is an efficient lexicalization procedure which induces a lexical LCFRS from any discontinuous treebank. We describe a modification to usual chart-based LCFRS parsing that accounts for supertagging and introduce a procedure that transforms lexical LCFRS derivations into equivalent parse trees of the original treebank. Our approach is evaluated on the English Discontinuous Penn Treebank and the German treebanks Negra and Tiger.

Study and characterization of acoustic gain of parabolic reflector

The parabolic reflector is used in directed acoustic systems, with the aim of gettingdirectivity, as well as increasing the gain in transmission and reception. Therefore, a theoretical study was carried out to describe the factors that affect the gain of the parabolic dish in the acoustic field. The frequency-gain relationship was experimentally obtained using a parabolic dish with an elliptical aperture, in addition to the analysis of the factors that led to the deviation of the experimental relationship from the theoretical relationship.

Comparison of Renewable Energy Options for a Typical Housing unit

This study evaluates the energetic and environmental performances of a group of renewable energy technologies widely used in the residential sector, by applying them to a typical housing unit that resembles to some extent our local housing units. Then comparing those technologies with the conventional ones. The renewable energy technologies used in this study are: thermosiphon domestic solar water heater with evacuated tube collector, PV system, geothermal heat pump (GSHP), in addition to four hybrid systems that include: the solar water heater with three types of backup systems (diesel, electricity and natural gas) and a hybrid system that combines between the geothermal heat pump and a PV system to operate it.

Design and characterization of parabolic acoustic dish

Usually, a reflector dish with a loudspeaker or a microphone placed at its focal point is used in directed acoustic systems to determine the direction in which the acoustic wave is transmitted or received, in addition to improve the gain in the acoustic transmission or reception. As the parabolic reflector dish with an oval aperture has significant advantages, and there is no relationship between parameters of this dish and some variables that have direct influence on acoustical emission or reception of this dish, this work is intended to find this relationship, and this is achieved by carrying out a theoretical and experimental study to find the optimum utilization of this dish in directed acoustic systems.

High Rise Buildings And The Role Of Construction Systems In Their Development

This article, will look at the structural development of the high rise buildings and the factors that led to these developments, and so out of the basic structural systems, even new classifications for constructional systems (internal systems external systems), as well as most construction systems deployed use.

A New Graphical Method for Modeling Sequential Controller Using High-Level Petri Nets

In this article we propose a new graphical method for modeling sequential controllers using high-level colored Petri nets. We will present how to build a sequential controller using this method and analyze its state space. The results in this study showed an advantage of the controller designed by the new method compared to which designed algebraically by ordinary Petri net in complex systems. The new method simplify the sequential controller network and increase the performance speed and improve the reliability.

A Study of Tall Buildings and Their Structural Systems

this paper reviews definition of tall buildings, a brief history of their development which can be broadly classified into three periods, and the primary factors of their evolution. In addition to studying their lateral load resisting systems with some examples of each one, we presented seven major structural systems each one suit different architectural forms and allows specific height.

Personal Identification via Handprint with use of Zero-Crossing Technology

Personal identification based on handprint has been gaining more attention with the increasing needs of high level of security. In this study a novel approach for human recognition based on handprint is proposed. Wavelet transform was used to extract features presented in the palm image based on wavelet zero-crossing method. Firstly the wavelet transform of the whole palm image at the fourth level was worked out, which results in four matrices; three of them are detail matrices (i.e., horizontal, vertical and diagonal) as well as one approximation matrix. Throughout this study, only the detail matrices were used because the required information (i.e., hand lines and curves) is included in those matrices. Sixteen features were extracted from each detail matrix, and then arranged in one vector. Consequently, for each palm sample a feature vector consisting of 48 input features of the used neural network was obtained. For this purpose, a database consisting of 400 palm images belonging to 40 people at the rate of 10 images per person was built. Practical tests outcome showed that the designed system successfully indentified 91.36% of the tested images.

Networks Management using the Ubuntu Server system

أتت فكرة المشروع من الأهمية المتزايدة للنظم المفتوحة المصدر في أيامنا هذه لاسيما الإمكانات الواسعة التي تتيحها هذه النظم في مجال إدارة الشبكات, حيث يهدف مشروعنا إلى إظهار مزايا نظام Ubuntu وذلك من خلال عرض وإعداد مجموعة من الخدمات التي يقدها في مجال إدارة الشبكات, وبالتالي إظهار الفائدة العلمية والعملية منها, حيث نرى الجانب العلمي من خلال شرح ماتقوم به كل خدمة وماهي البروتوكولات والآليات التي تبنى عليها الخدمة, والتي أيضاً تظهر بشكل واضح من خلال الجانب العملي لكل خدمة لمافيه من عرض شامل للفائدة التي يمكن الحصول عليها.

Modeling the Scheduling Algorithms of Periodic Tasks and Analyzing its Performance on Real-Time Multiprocessor Systems

The research presents molding and analytical study of several scheduling algorithms types in real-time multiprocessor systems. The performance of three scheduling algorithms have been analyzed : Earliest Deadline First Scheduling (EDF) , Least Laxity First Scheduling (LLF), and Earliest Deadline First until Zero Laxity Scheduling (EDZL). This paper considers the scheduling of n periodic, independed, and preempted tasks with implicit deadlines on a platform of m homogenous multiprocessor. It has compared in terms of the load on the processor (processor's busyness) , the number of migrations, and the number of preemptions and the number of times in which these algorithms did not succeed in achieving the time limits for tasks where the latter is considered the most important criterion in real time scheduling. It also considers scheduling growing task sets of periodic tasks starting from 4 task set up to 64 task set, in order to study the effect of increasing the number of tasks and processors also on the performance of the scheduling algorithms. As a result of research, the strengths and weaknesses in the performance of these three algorithms have presented. It is proposed the best type of real-time system to apply each algorithm according to the strengths of its performance.