ehsan noroozizadeh was born in dezful/khoozestan, iran. he received his b.s. in pure chemistry (2011) and m.s. in organic chemistry (2013) from bu-ali sina university, iran. he is currently working towards his ph.d. under the supervision of professor mohammad ali zolfigol. his research interest is catalysis, including the application of homogeneous and heterogeneous catalysis in organic synthesis.

Peptides have shown Promising effect as pharmaceutics with the potential to treat a widevariety of diseases. Peptides are mostly synthesized by biological technology or chemicalmethods. Solution phasepeptide synthesis (SPS) and solid phase peptide synthesis (SPPS) aretwo major chemical techniques for peptidesproduction.In this research, the synthesis ofdipeptde(β-alanine-L-histidine)wasexamined...

Concatenative synthesis is a promising method of musical sound synthesis with a steady stream of work and publications in recent years. It uses a large database of sound snippets to assemble a given target phrase. We explain its principle and components and its main applications, and compare existing concatenative synthesis approaches. We then list the most urgent problems for further work on c...

It was early recognized in the history of speech technology, that prosody plays an essential role in the communication process and that it is therefore necessary to include prosodic components into the speech-based systems for man-computer interaction. Recent text-to-speech (TTS) systems show prosodic components at an elementary level (intonation and duration) for good comprehensibility, but it...

Mixed research synthesis is the latest addition to the repertoires of mixed methods research and systematic review. Mixed research synthesis requires that the problems generated by the methodological diversity within and between qualitative and quantitative studies be resolved. Three basic research designs accommodate this diversity, including the segregated, integrated, and contingent designs....

E ducational research confirms the ancient wisdom that practice makes perfect; and educational reform groups such as the National Governors' Association (1986) are call ing on educators to allocate more time for students to learn. In this paper, I review current psychological research on the effects of time and discuss policy and practical implications. I also propose that "productive time" rat...

The NHS needs valid information on the safety and effectiveness of healthcare interventions. Cochrane systematic reviews are an important source of this information. Traditionally, Cochrane has attempted to identify and include all relevant trials in systematic reviews on the basis that if all trials are identified and included, there should be no selection bias. However, a predictable conseque...

When vowels are synthesised by means of a source-filter model, a delta-pulse train is often used as a source signal. Although breathiness can to some extent be simulated by using a sophisticated glottal-source model, a more natural simulation of breathiness requires the addition of aspiration noise. When stationary noise is used, however, the noise is to a large extent perceived as coming from ...