segment

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segment

1. Maths
a. a part of a line or curve between two points
b. a part of a plane or solid figure cut off by an intersecting line, plane, or planes, esp one between a chord and an arc of a circle
2. Zoology any of the parts into which the body or appendages of an annelid or arthropod are divided
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Segment

 

in mathematics. A segment of a line is the set of points on the line that are located between two points A and B; in Russian usage, the segment includes both A and B. In other words, a segment is the set of points of a line such that the coordinates of the points satisfy the condition axb, where a and b are the coordinates of the segment endpoints. Thus, the segment constitutes a closed interval and can be denoted by [a, b].


Segment

 

(1)A segment in the plane is a region bounded by a chord and the arc of the curve subtended by the chord. The area of the segment AmB of the circle in Figure 1 is the difference between the area of the sector OAmB and the triangle OAB.

Figure 1

(2) A segment in space is a part cut off from a solid by a plane. An example is a spherical segment.

(3) A segment of a line is the set of points on a line that are located between two points A and B. In Russian usage, the two points A and B are included in the segment. Thus, a segment is the set of points on a line whose coordinates satisfy the condition axb. (SeeINTERVAL AND SEGMENT.)


Segment

 

(also metamere), one of a series of homologous parts of the body of an animal, located along the long axis of the body. Segments may be similar to one another; for instance, among the most primitive annelids the entire complex of organs is repeated in each segment. Given the same general structure, complete similarity between segments may be destroyed by the absence of certain organs or by some change in the organs: these types of segments may be observed among arthropods. The segmentation of an animal’s body is also called metamerism.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

segment

[′seg·mənt]
(analytical chemistry)
A specific, demarcated portion of a lot of a substance that is to be chemically analyzed.
(computer science)
A single section of an overlay program structure, which can be loaded into the main memory when and as needed.
In some direct-access storage devices, a hardware-defined portion of a track having fixed data capacity.
(mathematics)
A segment of a line or curve is any connected piece.
A segment of a circle is a portion of the circle bounded by a chord and an arc subtended by the chord.
A segment of a totally ordered Abelian group G is a subset D of G such that if a is in D then so are all elements b satisfying -aba.
(navigation)
In air operations, a basic functional division of an instrument approach procedure; it bears a fixed orientation with respect to the course to be flown; it is assigned specific geometric coordinates which uniquely determine its position; the location of the segment is assigned with respect to the obstacles in the operations area.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

segment

/seg'ment/ 1. <architecture> A collection of pages in a memory management system.

2. <programming> A separately relocatable section of an executable program. Unix executables have a text segment (executable machine instructions), a data segment (initialised data) and a bss segment (uninitialised data).

3. <networking> network segment.

4. To experience a segmentation fault. Confusingly, the stress is often put on the first syllable, like the noun "segment", rather than the second like mainstream verb "segment". This is because it is actually a noun shorthand that has been verbed.

5. A block of memory in a segmented address space.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

segment

(1) Any partition, reserved area, partial component or piece of a larger structure. See overlay.

(2) One of the bars that make up a single character in an LED or LCD display.

(3) For DOS segment addressing, see paragraph.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
In one randomized trial, 106 women undergoing CD for a placenta previa were randomly assigned to uterine devascularization alone or double transverse compression suture at the lower uterine segment plus intrauterine Foley catheter balloon.
During the caesarean section in patients with pernicious placenta previa complicated with placenta increta/percreta, our study demonstrated that a balloon occlusion of the abdominal aorta before the delivery of the fetus combined with a transverse incision on the lower uterine segment, can effectively control the amount of intraoperative blood loss and reduce the utilization rate of intraoperative blood products.
Caption: Figure 2: Coronal T2-weighted image of the pelvis at 18 weeks of gestation demonstrates a hypointense round structure (arrow) at the lower uterine segment infringing upon (and invaginating into) the gestational cavity.
It invaded the lower uterine segment and the myometrium, less than the outer half, and consisted of elongated spindle cells with a myxoid background and few benign glandular formations.
Women who had coagulopathy disorders, lower uterine segment tears extending to the vagina, and bleeding due to an injured artery were excluded from the study.
ACOG's 2012 Practice Bulletin on Prediction and Prevention of Preterm Birth, which does not mandate universal screening but supports its consideration, notes that, "if second trimester transabdominal scanning of the lower uterine segment suggests that the cervix may be short or have some other abnormality, it is recommended that a subsequent transvaginal ultrasound examination be performed to better visualize the cervix and establish its length" (Obstet Gynecol.
Normal placental implantation is decidual in the upper uterine segment. When placenta implants over or near to the internal os in the lower uterine segment, it is referred to as placenta previa, while term placenta accreta is used to refer to a placenta that has abnormal uterine adherence4-6.
Sonographic evaluation of the lower uterine segment in patients with previous cesarean delivery.
It is speculated that the uterine muscle section during abdominal delivery interfered with its physiological stretching, and prevented or restricted the placenta moving away to the upper uterine segment in a subsequent pregnancy.2,3,5,18,24
Pelvic sonography showed enlarged distorted uterus with solid mass of about 8.6x6.3 cm occupying the lower uterine segment and cervical region extending down into the vagina, most likely fibroid.
Computerised tomography (CT) angiogram confirmed the presence of a 2.2x1.8 cm cystic area in relation to the anterior aspect of lower uterine segment with arterial channels around it.
Cardiac activity should be evident by 7 weeks.4 In 4.68% patients of incomplete abortion, retained products of conception (POCs) visualized in lower uterine segment / cervical canal, a collection of blood / placental remnants in the shape of irregular mass.