Abstract:
Methods and systems for data communication in a distributed computing environment include: providing a first network node associated with a first data processing location, the first network node providing provide a network interface for a first distributed computing node at the first data processing location; and forwarding task data flow messages from the first distributed computing node to a second distributed computing node at a second data processing location via a second network node associated with the second data processing location.
Abstract:
The present disclosure is drawn to methods and systems for managing clusters of distributed file systems having cluster files stored thereon. An intermediate layer is provided between user devices having applications running thereon and clusters of distributed file systems for managing and coordinating operation across multiple clusters using metadata about the cluster files.
Abstract:
A method and a device for measuring a transition rate between a first phase of a material and a second phase of the material wherein the material is solid or liquid in the first phase and gaseous in the second phase. A thermopile which includes a plurality of conductor transitions at an interface area between the first and second phases. The thermopile has a first portion which includes every second one of the conductor transitions, and a second portion that includes the remaining conductor transitions. In addition, the method includes measuring a thermoelectric voltage that is applied on the thermopile and that represents a temperature difference between the first and second portions of the thermopile.
Abstract:
A rope pulling exercise apparatus includes an exercise base, a rope base, a pivot base, a pivot-base pulley and a rope. The rope base along an exercise direction has a first end and a second end, and the first end is connected to the exercise base. The pivot base is pivotally joined to the second end of the rope base. A swing direction of the pivot base is relative to the exercise direction. The pivot-base pulley is pivotally connected at the pivot base. The rope has one end connected to the rope base and the other end for pulling along the exercise direction, and the rope is wound around the pivot-base pulley.
Abstract:
The present utility model discloses an improved optical package which includes a light source, an installation socket, a mirror and a convex lens, wherein at least one part of the projection of the reflection surface of the mirror on its axial section is in a parabolic shape, and the axes of the mirror and the convex lens share the same line. The installation socket can move along the axial direction of the convex lens and an installation depression is set at the front end of the installation socket, wherein the light source is configured in the installation depression, the emitting point of the light source is on the axis of the convex lens and the circumference of the installation depression is formed to be a reflection surface capable of reflecting the light emitting from the bottom of the light source.
Abstract:
A method for making a field emission device includes the following steps. An insulative substrate is provided. An electron pulling electrode is formed on the insulative substrate. A secondary electron emission layer is formed on the electron pulling electrode. A first dielectric layer is fabricated. The first dielectric layer has a second opening to expose the secondary electron emission layer. A cathode plate having an electron output portion is provided. An electron emission layer is formed on part surface of the cathode plate. The cathode plate is placed on the first dielectric layer. The electron output portion and the second opening have at least one part overlapped, and at least one part of the electron emission layer is oriented to the secondary electron emission layer via the second opening.
Abstract:
An electrical connector has a insulative housing defining a plurality of passageways and a plurality of contacts secured in the passageways. Each passageway has a mating slot and a pair of retaining slots located at two sides of the mating slot and communicated with the mating slot. Each contact defines a soldering tail and a pair of arm portions extending from the soldering tail and retained in the two retaining slots respectively, the pair of arm portions shift in and between the mating slot and the retaining slot in a first direction, a pair of contact portions integrally project oppositely from inner sides of the arm portions. Wherein the arm portions define shrink sections at a position thereof opposite to the contact portions so that the shrink sections space away from the retaining slots in a second direction perpendicular to the first direction. It can reduce inserting force and ensure electrical connecting performance of the electrical connector.
Abstract:
An electrical connector comprises an insulative housing, a plurality of terminals and a rigid height-adjustable member. The insulative housing defines a mating face, a back face, at least a lengthwise slot on the mating face, and a plurality of passageways extending through the housing from the mating face to the back face. Each of the terminals received in the respective passageways of the insulative housing comprises a contact portion extending into the slot, a retention portion secured in a corresponding passageway of the insulative housing, a mounting end, an S-shaped bellowed portion between said retention portion and the mounting end and configured to extend out of the back face of the insulative housing. The rigid height-adjustable member is supportably mounted onto the housing to lift up the housing to a predetermined height.
Abstract:
An electrical connector is mated with a counter connector in an inserting direction. The electrical connector includes an insulative housing and two rows of contacts inserted into the insulative housing in two opposite directions parallel to the inserting direction. The insulative housing defines two rows of receiving passageways arranged in a height direction perpendicular to the inserting direction. Each contact received in the receiving passageway defines a base portion, a pair of retaining portions extending from the base portion, a pair of elastic arms extending from the pair of retaining portions and a soldering portion extending from the base portion. All the contacts have a same shape expect lengths of the soldering portions.
Abstract:
A method for making a field emission device includes the following steps. An insulative substrate is provided. An electron pulling electrode is formed on the insulative substrate. A secondary electron emission layer is formed on the electron pulling electrode. A first dielectric layer is fabricated. The first dielectric layer has a second opening to expose the secondary electron emission layer. A cathode plate having an electron output portion is provided. An electron emission layer is formed on part surface of the cathode plate. The cathode plate is placed on the first dielectric layer. The electron output portion and the second opening have at least one part overlapped, and at least one part of the electron emission layer is oriented to the secondary electron emission layer via the second opening.