Miracle-dz/UniFAR-FTUs huggingface dataset:
Literacy teachers’ perceptions of professional development that increases integration of technology into literacy instruction

A national survey of 1441 literacy teachers in the US was conducted to understand the integration of digital technology into instruction. This paper reports results from open-ended questions in the survey aimed at determining teachers’ perceptions about how to improve professional development in the area of technology integration. Data were analysed using qualitative methods. Respondents identified four factors that they believe would contribute effectively to their own professional development: (a) time: time to explore, practise, and prepare for literacy instruction into which they integrate technology; (b) access: access to equipment during and after professional development; (c) knowledge: access to higher level knowledge, knowledgeable presenters, and relevant background knowledge; and (d) support: ongoing, follow-up, and small group support. Implications for the improvement of literacy teachers’ professional development and student learning are discussed.
Optical Processing Of Imaging Spectrometer Data

The data processing problems associated with imaging spectrometer data are reviewed; new algorithms and optical processing solutions are advanced for this computationally intensive application. Optical decision net, directed graph, and neural net solutions are considered. Decision nets and mineral element determination of non-mixture data are emphasized here. A new Fisher/minimum-variance clustering algorithm is advanced, initialization using minimum-variance clustering is found to be preferred and fast. Tests on a 500 class problem show the excellent performance of our algorithm.
Effect of switch cost on the design of hybrid optoelectronic networks

Feature Issue on Next-Generation WDM Network Design and Routing (WDMN). We consider the design of a hybrid optoelectronic network with grooming. We propose a model in which we take into account the fact that grooming traffic requires o-e-o conversion and processing by the electronic switch. This requirement, in turn, means that a new switch must be installed whenever its processing capacity is exhausted so that grooming cost exhibits a large modularity--an element that is missing from all current models. We show on small-network examples that this modularity has a very strong effect on the structure of the dimensioning and routing of the demands.
Media digital signal processor core design for multimedia application

An embedded single media processor named MediaDSP3200 core fabricated in a six-layer metal 0.18um CMOS process which implemented the RISC instruction set, DSP data processing instruction set and single-instruction-multiple-data (SIMD) multimedia-enhanced instruction set is described. MediaDSP3200 fuses RISC architecture and DSP computation capability thoroughly, which achieves RISC fundamental, DSP extended and single instruction multiple data (SIMD) instruction set with various addressing modes in a unified pipeline stage architecture. These characteristics enhance system digital signal processing performance greatly. The test processor can achieve 32x32-bit multiply-accumulate (MAC) of 320 MOPS, with 16x16-bit MAC of 1280MOPS. The test processor dissipates 600mW at 1.8v, 320MHz. Also, the implementation was primarily standard cell logic design style. MediaDSP3200 targets diverse embedded application systems, which need both powerful processing/control capability and low-cost budget, e.g. set-top-boxes, video conferencing, DTV, etc. MediaDSP3200 instruction set architecture, addressing mode, pipeline design, SIMD feature, split-ALU and MAC are described in this paper. Finally, the performance benchmark based on H.264 and MPEG decoder algorithm are given in this paper.
Does Hypertext Disadvantage Less Able Readers?

This article reports on an investigation of the relationship between print and hypertext reading skills in university students. The study employed a counterbalanced repeated measures design that required subjects to answer questions using both print and hypertext versions of a student advising handbook. Two research questions guided the study. One question explored whether readers in general experience greater difficulty with hypertext than they do in traditional print. The second question focused specifically on what, if any, differential disadvantage might be experienced by less able print readers. Significant effects included a practice effect, a general format effect favoring print over hypertext, and a question-set effect. The study supports the claim that readers find hypertext more difficult, but there was no evidence that hypertext differentially disadvantages less able print readers.
Friends Recommendation Algorithm Based on Graph Mining and Collaborative Filtering

As an open, free, flexible social platform, microblog develops rapidly recent years. State of art research on friends recommendation has attract both industrial and academical concerns. Compared with traditional social networks, microblog contains both strong social relations based on the real relationship, and weak social relations based on interests, locations and other incidental factors. How to utilize these relationships and characters in personalized friends recommendation is still under research. This paper presents a new hybrid recommendation model, considering both the relationship strength and interest similarity in microblog, using the social graph mining algorithm to find strong social relations and the item-based collaborative filtering algorithm to mine weak social relations. Experimental results show that the proposed hybrid algorithm outperforms the traditional algorithm.
A Single-chip Hearing Aid With One Volt Switched Capacitor Filters

An integrated circuit has been designed and fabricated in BiCMOS technology which contains three switchedcapacitor fourth-order filters and one continuous-time fourth-order filter, as well as all other circuitry needed for a modern hearing aid. The circuit operates from a single hearing aid battery and functions down to 1.1 Volt, while the switched-capacitor filters are designed to allow power supplies as low as 1.0 Volt.
SOMBRERO: A VERY LARGE SINGLE ADDRESS SPACE DISTRIBUTED OPERATING SYSTEM

With the advent of processors providing access to very large address spaces, 64 bits and up, a new window of opportunity is opened to reapproach operating system design. By conducting all of the activities of a computer network in the same single very large address space, matters pertaining to protection, naming, persistence, network consistency, shared memory, memory allocation and management, the use of threads, and the extensibility of these matters to the network can all be optimized in new ways. Sombrero is a design study which takes a broad look at some strategies to take advantage of this new paradigm. Particular emphasis is made in this thesis concerning protection domains and protection domain management using tokens and the usefulness of these for object distribution.
Parallel machine replacement

We consider the parallel replacement problem in which there are both fixed and variable costs associated with replacing machines. Increasing maintenance costs motivate replacements, and the fixed replacement cost provides incentive for replacing machines of different ages together in “clusters. ” We prove two intuitive results for this problem. First, it is never optimal to split a cluster of like-aged machines, and second, it is never optimal to replace newer clusters before older clusters. By incorporating these two results into an algorithmic approach, we vastly reduce the amount of computation required to identify an optimal replacement policy.
Converging technologies: multimedia and gaming simulation

The model-supported case study, also called a "Management Flight Simulator" (MFS), is now being established as a tool to facilitate experiential learning with undergraduate and postgraduate management students, and managers within learning organisations. Existing Management Flight Simulators provide user-friendly reports and graphical representations of historical data. They also make use of sophisticated quantitative databases and models, but they lack "soft" data. Managers rarely make decisions without actually looking at the
Highly linear 0.18-μm CMOS power amplifier with deep n-Well structure

The linearity of a 0.18-/spl mu/m CMOS power amplifier (PA) is improved by adopting a deep n-well (DNW). To find the reason for the improvement, bias dependent nonlinear parameters of the test devices are extracted from a small-signal model and a Volterra series analysis for an optimized nMOS PA with a proper matching circuit is carried out. From the analysis, it is revealed that the DNW of the nMOS lowers the harmonic distortion generated from the intrinsic gate-source capacitance (C/sub gs/), which is the dominant nonlinear source, and partially from drain junction capacitance (C/sub jd/). Single-ended and differential PAs for 2.45-GHz WLAN are designed and fabricated using a 0.18-/spl mu/m standard CMOS process. The single-ended PA with the DNW improves IMD3 and IMD5 about 5 dB with identical power performances, i.e., 20 dBm of P/sub out/, 18.7 dB of power gain and 31% of power-added efficiency (PAE) at P/sub 1dB/. The IMD3 and IMD5 are below -40 dBc and -47dBc, respectively. The differential PA with the DNW also shows about 7 dB improvements of IMD3 and IMD5 with 20.2 dBm of P/sub out/, 18.9 dB of power gain and 35% of PAE at P/sub 1dB/. The IMD3 and IMD5 are below -45 dB and -57 dBc, respectively. These performances of the linear PAs are state-of-the-art results.
Evaluating Network Security Based on Attack Graph

By now, Attack Graph (AG) is widely applied to the field of network security assessment. In the AG, each vertex has a value that implies the probability of the exploit and each edge represents the relationship between the exploits. In this paper we design an AG model and propose an approach which integrates the AG model with the Dynamic Bayesian Network (DBN). The approach not only strengthens the rationality of uncertain reasoning, but also provides a quantitative assessment of network security status. We evaluated the approach by experiment. The results showed that our model is rather accurate and the performance of it is competitive.
Using the Vanderbilt Television Abstracts to Track Broadcast News Content: Possibilities and Pitfalls

The Vanderbilt Television News Archive supplies written abstracts for its video collection of news programs. Researchers from many disciplines use the abstracts to locate stories, track specific topics, and measure the evaluative tone of news. This study examines the validity of using abstracts as substitutes for full-text transcripts. Drawing on an analysis of the abstract writing process, we highlight potential sources of error and analyze the correspondence between transcripts and abstracts. Results of a quantitative content analysis suggest abstracts can reflect important elements of news when used at high levels of aggregation but may be unreliable as substitutes for news content.
Lonza: 20 Years of Biotransformations

Biotransformations are an important tool in organic synthesis, especially for the production of chiral molecules, and where chemical reactions are not possible or inefficient. Lonza is a major custom manufacturer of intermediates for the life science industries, and uses biocatalysis in many of its processes. A synthetic route may have one or more biotransformation steps. This article gives a number of examples of syntheses that involve biotransformations for the production of both achiral and chiral intermediates, at development and production scales. For each example the reasons and advantages of using a biotransformation are given.
Parallel Min-max-pair Heap

Priority deques allow, in addition to the priorityqueue operations of inserting an element and deleting the largest element, the deletion of the smallest element. Data structures like min-max heap, deap, minmax-pair heap, and interval heap, described in the literature, for implementing priority deques achieve only O(1ogn)-parallelism, where n is the number of elements. To alleviate this bottleneck, we present the parallel min-max-pair heap, a new parallel data structure for priority deques, which achieves a pfold parallelism with p processors for all p 5 n. First, we describe how it supports deletion of p largest elements, deletion of p smallest elements, and insertion of p elements in O(log n logp) time using p processors on the exclusive-read exclusive-write (EREW) parallel random-access machine (PRAM). Then, to obtain cost-optimal parallel algorithms, we show that the operations can be pipelined on this structure and that p operations can be handled in O(1ogn) time with p processors.
Trenched‐Sinker LDMOSFET (TS‐LDMOS) Structure for 2 GHz Power Amplifiers

This paper proposes a new LDMOSFET structure with a trenched sinker for high‐power RF amplifiers. Using a low‐temperature, deep‐trench technology, we succeeded in drastically shrinking the sinker area to one‐third the size of the conventional diffusion‐type structure. The RF performance of the proposed device with a channel width of 5 mm showed a small signal gain of 16.5 dB and a maximum peak power of 32 dBm with a power‐added efficiency of 25% at 2 GHz. Furthermore, the trench sinker, which was applied to the guard ring to suppress coupling between inductors, showed an excellent blocking performance below −40 dB at a frequency of up to 20 GHz. These results confirm that the proposed trenched sinker should be an effective technology both as a compact sinker for RF power devices and as a guard ring against coupling.
Time sequence analysis in geophysics

Time sequence analysis is the study of relations between a sequence of data points or sequence of signals in order to determine the physical properties of the earth. Providing an up-to-date treatment on time series and time sequence, this book is intended for senior or graduate students in seismology, geomagnetism and exploratory geophysics.
An Approach for Designing and Implementing Eager and lazy Data Replication

Replication can be a success factor in database systems as well as perhaps being one of the needs of proliferation, expansion, and the rapid progress of databases and distributed technology, despite there being a strong belief among database designers that most existing solutions are not feasible due to their complexity, poor performance and lack of scalability. This paper provides an approach that can help designers in implementing eager and lazy replication mechanisms. The proposed approach contains two phases: In the first phase, the database is designed to have indicator fields that can carry the update status, and to consider the replication concepts by classifying, categorizing and determining the kinds and locations of data objects; in the second phase, the updating methodology is provided to make the implementation of eager and lazy replication mechanisms easier and reliable. General Terms Computer Science, Database, Distributed Database System.
A hierarchical model for teletraffic

Self-similarity over certain time scale range has been repeatedly observed in high speed network traffic. We propose a model motivated by the physical process of teletraffic generation to decipher such a phenomena. Our model is hierarchical in nature. We examine some properties of our model from a signal theoretic point of view, and explain why it will exhibit multiscale or self-similar behavior. Simulations of synthetic traffic based on our model are presented and its multi-scale properties are compared with that of the well-known Bellcore traffic traces. We present some preliminary conclusions on the actual nature of the traffic and the validity of our model.
The Selection of a Business Major: Elements Influencing Student Choice and Implications for Outcomes Assessment

In this article, the authors examine the key factors that influence student choice of a business major and how business schools can help students make that choice more realistically. Investigating students at a regional university, the authors found that whereas those with better quantitative skills tended to major in accounting or finance, those with weaker quantitative skills tended to major in marketing and management. For adherence to the requirements for expanded assurance of learning (outcomes assessment) included in AACSB International's eligibility standards (2003), the authors suggest that schools of business provide their students with a clear statement of the opportunities and requirements in each business major.
A Methodology for Quantifying the Kinematic Position Errors due to Manufacturing and Assembly Tolerances

A systematic and general methodology for kinematic position errors analysis of multibody systems is investigated throughout this work, taking into account the influence of the manufacturing and assemble tolerances on the performance of planar mechanisms. The generalized Cartesian coordinates are used to mathematically formulate kinematic constraints and equations of motion of the multibody systems. Thus, the systems are defined by a set of generalized coordinates, which represents the instantaneous positions of all bodies, together with a set of generalized dimensional parameters that defines the functional dimensions of the system. These generalized dimensional parameters take into account the tolerances associated with the lengths, fixed angles, diameters and distance between centers, among others. This paper highlights the relation among kinematic constraints, dimensional parameters and output kinematic parameters. Based on the theory of dimensional tolerances, the variation of the geometrical dimensions is regarded as a tolerance grade with an interval associated with each dimension and, consequently, a kinematic amplitude variation for the bodies’ position. The methodology presented is implemented in a computational code developed for kinematic analysis of multibody systems, capable of automatically generating and solving the equations of motion for general multibody systems. Finally, a slider-crank mechanism is used as a numerical example to demonstrate the accuracy of the presented methodology, as well as to discuss the main assumptions and procedures adopted in this work.
Diseño funcional y propuesta de implementación de una herramienta de apoyo a la construcción colaborativa de conocimiento

0 0 1 147 810 USAL 6 1 956 14.0 Normal 0 21 false false false ES JA X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:Calibri; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-ansi-language:ES; mso-fareast-language:EN-US;} This article describes the process of conceptualization and functional design of an electronic forum, which aims to facilitate learning processes based on communication, but also on collaboration and social knowledge building, and their monitoring and evaluation. The experience is based on an innovation project involving the design, development and pilot implementation of an asynchronous communication tool, in the context of the Open University of Catalonia (UOC) virtual campus. The design of the tool is based on the analysis of different reference models regarding the use of technology to support collaborative learning and social knowledge building processes. In parallel, and after analyzing some models for the study of collaborative knowledge building processes in virtual environments, the article presents a proposal for the analysis and assessment of such processes mediated by asynchronous communication tools similar to the one designed.
A Real-time Compact Structured-light based Range Sensing System

In this paper, we propose a new approach for compact range sensor system for real-time robot applications. Instead of using off-the-shelf camera and projector, we devise a compact system with a CMOS image-sensor and a DMD (Digital Micro- mirror Device) that yields smaller dimension (168x50x60mm) and lighter weight (500g). We also realize one chip hard-wired processing of projection of structured-light and computing the range by exploiting correspondences between CMOS image- sensor and DMD. This application-specific chip processing is implemented on an FPGA in real-time. Our range acquisition system performs 30 times faster than the same implementation in software. We also devise an efficient methodology to identify a proper light intensity to enhance the quality of range sensor and minimize the decoding error. Our experimental results show that the total-error is reduced by 16% compared to the average case.
Fourier and wavelet analyses of normal and epileptic electroencephalogram (EEG)

Human normal and epileptic electroencephalogram (EEG) signals have been analyzed using Fourier transform (FT) and continuous wavelet transform (CWT) as well as discrete wavelet transform (DWT). The power spectrum densities of both normal and epileptic EEG showed 1/ f/sup a/ fluctuations as a function of frequency f. The alpha rhythms that appeared in the normal EEG were not observed in the epileptic EEG. FT could not reveal the localized spikes and complexes that are typical among epileptic seizures. On the contrary, both CWT and DWT analyses could clearly detect localized low-frequency epileptic components in the EEG records. Our final goal of the study is the automatic detection of the epileptic disorders in the EEG in order to support the diagnosis and care of the epileptic syndromes and related seizure disorders.
The use of decision table logic in a manufacturing system

SUMMARY Decision tables provide a graphical representation of complex procedures in a way that is easy to visualize and understand. The work required to define the system, develop and programme the solution and to provide the often neglected documentation can be incorporated in a tabular form so that all elements of decision taking are precisely denned. The tables present the relationships among the interfacing variables dearly and show the necessary sequences of conditions and actions in a simple manner. The writing and development of decision tables for implementation in a manufacturing system is indicated here giving details of appropriate checking procedures and con straint boundaries.
Structuring the programmer's task

Computer programming could be made easier. This paper gives a short account of the authors' empirical studies of programming, showing that very considerable improvements can be obtained both for beginners and for professionals. The improvements are related to, though not wholly dependent on, the new concepts of ‘structured programming’; we have found ways to improve both the programming language itself and the procedures used by the programmer. Psychological explanations of the effects are offered and the limitations of present findings are noted.
Complex Caged Polyisoprenylated Benzophenone Derivatives, Sampsoniones A and B, from Hypericum sampsonii

Abstract The aerial parts of the Chinese medicinal plant Hypericum sampsonii yielded two novel metabolites, sampsoniones A and B, which are characterised by their unique tetracyclo-polyketonic core with benzoyl, 3-methyl-2-butenyl and geranyl substituents. Their structures were determined by detailed spectral analysis. Sampsonione A exhibited moderate cytoxicity to P388 cancer cell line.