Effect of Spinning Triangle and Production Speed of Hollow-Spindle System on the Bouclé Yarn Structure

This study aims to show the impact of both the width of the base of the spinning triangle and the production speeds of hollow-spindle spinning machines on the structure of ultimate multiple-thread-structure bouclé yarns and similar fancy yarns. A hollow-spindle spinning machine was used and bouclé yarns were made of a core thread, an effect thread and a (multifilament) binder. Initially, five bouclé yarns were made by setting the widths of the base of the spinning triangle at five levels, i.e. 4.5 mm, 7.5 mm, 10 mm, 13 mm and 16 mm. A further six bouclé yarns were made to show the changes that occur to the spinning triangle at various production speeds. The resulting fancy bouclé yarns were assessed by measuring the size, number and circularity ratio of bouclé profiles. It was found that at low production speeds, i.e. at start-up, that the spinning triangle was unstable, which adversely affected the structure of the final bouclé yarns. However, at production speeds higher than 17 m/min, the spinning triangle became stable, though such a stable spinning triangle had no impact on the structure of the resulting fancy bouclé yarns. The results of this study may help fancy yarn manufacturers to avoid making defective fancy yarns.

Cosmetic “Gold Thread Therapy”: A Nuisance That Decreases the Diagnostic Quality of a Dental Panoramic Image

During routine imaging of the craniofacial region, it is recognised that some “cosmetic” procedures with metallic insertions can be revealed radiographically. These objects however make it difficult to obtain a good interpretation of anatomical structures for management of diseases. A 58-year-old female patient visited a private dental facility in Kuala Lumpur for prosthodontic replacement of missing teeth. The dental panoramic image revealed generalized bone loss and numerous unusual multiple thread-like radioopacities. These gold threads made radiographic evaluation difficult and complicated the process of treatment planning for dental implant placement advocated for this patient.

Resource Modification On Multicore Server With Kernel Bypass

Technology develops very fast marked by many innovations both from hardware and software. Multicore servers with a growing number of cores require efficient software. Kernel and Hardware used to handle various operational needs have some limitations. This limitation is due to the high level of complexity especially in handling as a server such as single socket discriptor, single IRQ and lack of pooling so that it requires some modifications. The Kernel Bypass is one of the methods to overcome the deficiencies of the kernel. Modifications on this server are a combination increase throughput and decrease server latency. Modifications at the driver level with hashing rx signal and multiple receives modification with multiple ip receivers, multiple thread receivers and multiple port listener used to increase throughput. Modifications using pooling principles at either the kernel level or the program level are used to decrease the latency. This combination of modifications makes the server more reliable with an average throughput increase of 250.44% and a decrease in latency 65.83%.

High Througput Multicore Server Dengan Kernel Bypass

Kernel performs one part of the overall operating system utility as a bridge between the user and the hardware. In multi core hardware, the kernel was also created with a general approach so it needs to be adjusted for specific purposes. Kernels for servers using common Kernels have many limitations, such as single socket descriptor, single IRQ, and lack of pooling so that they require some modification to run optimally. Kernel bypass is a method by eliminating the automation of a server used to realize a server, namely high throughput. Kernel bypass is a combination of techniques, modification at the driver level with hashing rx signal and modification of multiple receivers with multiple ip receivers, multiple thread receivers, and multiple port listeners. This combined modification makes the server more reliable with an average throughput increase of 250.44%.

Cutting procedure modification in hob cutters for multiple-thread spiral projection shaping on mandrel

An efficient technology for helical groove shaping on inner cylindrical surfaces with the use of a pressing operation through a ring matrix on a spiral press mandrel is described. There are presented investigations and offers are given to update spiral projection gear milling in mandrels with the aid of milling cutters with a modified cutting procedure.

Concurrent Bug Detection Using Invariant Analysis

In concurrent programs, bug detection is a tedious job due to non-determinism and multiple thread control. The bug detection is done by checking the interleaving of threads which is not available in operational phases. So, static analysis is one of the preferred approaches for detection of concurrent bug. Invariant based testing technique is one approach of static analysis used for detecting the concurrent bugs. In this paper, we discuss an invariant based testing approach using three steps: (i) the invariants of a given concurrent program are generated using Daikon tool. (ii) The bad invariants are removed by using the static call graph of the source code, where the static call graph is generated by the javacg tool. (iii) The reduced invariant set is obtained by eliminating the bad and redundant invariants which is used for testcase generation. Using the reduced invariant set, we generate the testcases that are used to find the various concurrent bugs such as Deadlock, Atomicity violation and Bad composition. We conducted an experiment on a well-known concurrent program called the Dining Philosopher Problem. The experimental results show that, the testcases obtained from the reduced invariant set is able to detect more types and no. of concurrent bugs than the existing approach on invariant based testing.

Structural modelling of multi-thread fancy yarn

Purpose The purpose of this paper is to mathematically model the structure of doubled fancy yarns made by combining together several threads. Design/methodology/approach It was assumed that such a structure may have two distinctive parts – sinusoidal and helical (i.e. sigmoidal). This model is based on calculating the length of the effect thread in relation to the core thread. The case of having several variants of such a structure was discussed to account for several types of doubled fancy yarns. The number of wraps of the binder, the overfed ratio, and heights of the fancy profiles in the different parts were the fundamental parameters of this model. The effects of changes in the number of wraps, the overfeed ratio or both simultaneously, on this model, were also considered. The shape factor of fancy yarn was also modelled depending on the basic model of the structure. Findings The model was tested and the correlation coefficient between the theoretical value and the real value of length of the effect thread was 0.90. Originality/value This model is useful for predicting the length of the effect component based on the type, dimension and number of the fancy profiles of doubled fancy yarn, and for understanding the changes of the multiple-thread structure of fancy yarn when the overfeed ratio and/or the number of wraps were to change.

Optimizing Apple Lossless Audio Codec Algorithm using NVIDIA CUDA Architecture

As majority of the compression algorithms are implementations for CPU architecture, the primary focus of our work was to exploit the opportunities of GPU parallelism in audio compression. This paper presents an implementation of Apple Lossless Audio Codec (ALAC) algorithm by using NVIDIA GPUs Compute Unified Device Architecture (CUDA) Framework. The core idea was to identify the areas where data parallelism could be applied and parallel programming model CUDA could be used to execute the identified parallel components on Single Instruction Multiple Thread (SIMT) model of CUDA. The dataset was retrieved from European Broadcasting Union, Sound Quality Assessment Material (SQAM). Faster execution of the algorithm led to execution time reduction when applied to audio coding for large audios. This paper also presents the reduction of power usage due to running the parallel components on GPU. Experimental results reveal that we achieve about 80-90% speedup through CUDA on the identified components over its CPU implementation while saving CPU power consumption.

A GPU-accelerated continuous and discontinuous Galerkin non-hydrostatic atmospheric model

We present a Graphics Processing Unit (GPU)-accelerated nodal discontinuous Galerkin method for the solution of the three-dimensional Euler equations that govern the motion and thermodynamic state of the atmosphere. Acceleration of the dynamical core of atmospheric models plays an important practical role in not only getting daily forecasts faster, but also in obtaining more accurate (high resolution) results within a given simulation time limit. We use algorithms suitable for the single instruction multiple thread architecture of GPUs to accelerate our model by two orders of magnitude relative to one core of a CPU. Tests on one node of the Titan supercomputer show a speedup of up to 15 times using the K20X GPU as compared to that on the 16-core AMD Opteron CPU. The scalability of the multi-GPU implementation is tested using 16,384 GPUs, which resulted in a weak scaling efficiency of about 90%. Finally, the accuracy and performance of our GPU implementation is verified using several benchmark problems representative of different scales of atmospheric dynamics.

The Process of Multi-Line Triangular Thread by Axial Line Method in Numerical Control Lathe

this paper gains information about the method and deficiency of center lathe processing multiple thread from the aspect of processing, discusses the common method of numerical control lathe processing multi-line triangular thread from the aspect of programming, and provides reference for solving the problem on difficulty in the numerical control lathe processing multi-line triangular thread.