The atomic structural features and the mechanical properties of amorphous silicoboron carbonitride ceramics with 13 different compositions in Si-BN-C phase diagram are investigated employing ab-initio calculations. Both chemical bonds local structures within network, relate to elemental composition. distribution nine types is composition-dependent, where B-C, Si-N, Si-C B-N hold a larg...

The Zarivar Lake a freshwater lake in west of Kurdistan Province is home for large number of native plant and animal species therefore water quality and health of the lake are vital for conservation of these species. The present study aimed at evaluation of the Zarivar Lake using NSF- WQI as an indicator of water quality. WQI is a suitable tool to examine and classify spatial and temporal varia...

The Zarivar Lake a freshwater lake in west of Kurdistan Province is home for large number of native plant and animal species therefore water quality and health of the lake are vital for conservation of these species. The present study aimed at evaluation of the Zarivar Lake using NSF- WQI as an indicator of water quality. WQI is a suitable tool to examine and classify spatial and temporal varia...

Lobsters are ubiquitous, economically important decapod crustaceans with apparently conflicting evolutionary relationships. Here, we describe the chromosomal location of major (45S rDNA) and minor (5S ribosomal gene families in four species Astacidea five Achelata, using two-color FISH. The family is located 4–16 sites per diploid chromosome set, Nephrops norvegicus (Nephropidae) showing highes...

The reaction of CH₃NH₂ with O₂ on the singlet potential energy surfaces (PES) was carried out using the B3LYP, CCSD(T) and G3B3 theoretical approaches along with 6-311++G(3df,3pd) basis set. The suggested mechanism for the title reaction consists of one pre-reactive complex. From the pre-reactive complex, nine types of products, CH2NH+H2O2, CH3NH+OOH,...

Currently mathematics difficulties in schools are a major problem due to several factors. Some research suggest that teaching-learning methodology could be one of the causes. As result, alternative teaching methods traditional approach (ciphers-based closed algorithm [CBC]) have emerged, such as numbers-based open (ABN) method. about this new has including neuropsychological studies. The curren...

According to different studies of the infant cry, the sub-harmonic components or double series of fundamental frequency as a rule does not occur in the crying of healthy neonates. An acoustic analysis was made of three samples of cry signal (continuous signal or several short phonations), and six phonations of the vowel /a/ by pre-school children with dysphonia and by school children with Down ...

Tabla, a percussion instrument, mainly used to accompany vocalists, instrumentalists and dancers in every style of music from classical to light in India, mainly used for keeping rhythm. This percussion instrument consists of two drums played by two hands, structurally different and produces different harmonic sounds. Earlier work has done labeling tabla strokes from real time performances by t...