Samsung

About: Samsung is a company organization based out in Seoul, South Korea. It is known for research contribution in the topics: Layer (electronics) & Signal. The organization has 134067 authors who have published 163691 publications receiving 2057505 citations. The organization is also known as: Samsung Group & Samsung chaebol.

An overview of multigigabit wireless through millimeter wave technology: potentials and technical challenges

Abstract: This paper presents an overview of 60 GHz technology and its potentials to provide next generation multigigabit wireless communications systems. We begin by reviewing the state-of-art of the 60 GHz radio. Then, the current status of worldwide regulatory efforts and standardization activities for 60 GHz band is summarized. As a result of the worldwide unlicensed 60 GHz band allocation, a number of key applications can be identified using millimeter-wave technology. Despite of its huge potentials to achieve multigigabit wireless communications, 60 GHz radio presents a series of technical challenges that needs to be resolved before its full deployment. Specifically, we will focus on the link budget analysis from the 60 GHz radio propagation standpoint and highlight the roles of antennas in establishing a reliable 60 GHz radio.

Method of manufacturing a semiconductor device

Abstract: A method and corresponding article of manufacture are provided for manufacturing a semiconductor device with contact holes of the same step formed by two photolithography processes, where the manufacture includes forming a photoresist pattern by a first photolithography process on an insulating interlayer in which a first contact hole is formed, the photoresist pattern covering the first contact hole, etching the insulating interlayer to form a second contact hole by using the photoresist pattern as an etching mask, partially removing the photoresist pattern to remove an etch by-product from the second contact hole, and performing a process on the second contact hole by using the photoresist pattern residue as a mask to thereby decrease the number of photo processes and simplify the manufacturing process

Sense of Virtual Community: A Conceptual Framework and Empirical Validation

Abstract: The sense of virtual community is a principal construct in virtual community research. Therefore understanding it in depth is important for studies of communities-of-practice, virtual collaboration, virtual organization, and other critical organizational and information systems issues. This article conceptualizes and operationalizes the sense of virtual community, and validates several of its antecedents. An analysis of 172 members of 44 virtual communities found that the sense of virtual community is affected by the enthusiasm of the community's leaders, off-line activities available to members, and enjoyability. These characteristics had a stronger impact for members of virtual communities that originated on-line than for those in communities that originated off-line. The implications of the findings and future research directions are discussed.

Sensorless drive of surface-mounted permanent-magnet motor by high-frequency signal injection based on magnetic saliency

Abstract: This paper presents a new sensorless control scheme of a surface-mounted permanent-magnet (SMPM) motor using high-frequency voltage signal injection method based on the high-frequency impedance difference. In the SMPM motor, due to the flux of the permanent magnet, the stator core around the q-axis winding is saturated. This makes the magnetic saliency in the motor. This magnetic saliency has the information about the rotor position. The high-frequency voltage signal is injected into the motor in order to detect the magnetic saliency and estimate the rotor position. In this paper, the relationship between the high-frequency voltages and high-frequency currents is developed using the voltage equations at the high frequency, and the high-frequency impedance characteristics are analyzed experimentally under various conditions. The proposed sensorless control scheme makes it possible to drive the SMPM motor in the low-speed region including zero speed, even under heavy load conditions. The experimental results verify the performance of the proposed sensorless algorithm.

Emerging MPEG Standards for Point Cloud Compression

Abstract: Due to the increased popularity of augmented and virtual reality experiences, the interest in capturing the real world in multiple dimensions and in presenting it to users in an immersible fashion has never been higher. Distributing such representations enables users to freely navigate in multi-sensory 3D media experiences. Unfortunately, such representations require a large amount of data, not feasible for transmission on today’s networks. Efficient compression technologies well adopted in the content chain are in high demand and are key components to democratize augmented and virtual reality applications. Moving Picture Experts Group, as one of the main standardization groups dealing with multimedia, identified the trend and started recently the process of building an open standard for compactly representing 3D point clouds, which are the 3D equivalent of the very well-known 2D pixels. This paper introduces the main developments and technical aspects of this ongoing standardization effort.