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Copyright of Proceedings of the YSU B: Chemical & Biological Sciences / Gitakan Teghekagir. K'imia, Kensabanut'yun is the property of Publishing House of Yerevan State University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Proceedings of the YSU B: Chemical & Biological Sciences / Gitakan Teghekagir. K'imia, Kensabanut'yun is the property of Publishing House of Yerevan State University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Proceedings of the YSU B: Chemical & Biological Sciences / Gitakan Teghekagir. K'imia, Kensabanut'yun is the property of Publishing House of Yerevan State University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Non deterministic polynomial complete problems are playing an essential role in nowadays communications, security and many other fields. One of the well-known NP-complete problems is the Examination Timetabling problem. Given the information about the courses and the students that have taken some of those courses as well as the time slots for the exams of those courses the problem asks if there is a timetable such that no student has two exams simultaneously. We are modeling this NP-complete problem as a system of particles with one dimensional motion. After adding some interactions between the particles based on the problem we are simulating the motion and arriving to an equilibrium. We then use the equilibrium state to group the particles together where each cluster represents a time slot. To discuss the physics of this model we use the Replica method to find the free energy functional of this system. A hypothesis is formulated that all or at least most numerical solutions for NP-complete problems can be brought to this model with some configuration of interactions between the particles. [ABSTRACT FROM AUTHOR]

Given the morbidity of open surgery, prenatal fetoscopic repair is becoming the preferred first-line procedure for myelomeningocele (MMC). Main outcomes were the obtention of a watertight repair at birth and the need for postnatal neurosurgical surgery including shunting within six months. Conclusions Laparotomy-assisted fetoscopic repair is a reasonable option for women that do not opt to terminate, both in terms of maternal and perinatal morbidity. [Extracted from the article]

19/23 (82.6%) fetuses with moderate/severe ventriculomegaly at T2 required HT postnatally. The aim of this study was to evaluate the evolution of fetal ventriculomegaly and the need for postnatal hydrocephalus treatment (HT) in cases with open neural tube defect (ONTD) repaired postnatally. [Extracted from the article]