Selection Of Suitable Medium Research Articles

Adaptive hypermedia instructional system (AHIS): A model

$$ AHIS\ Instruction=\frac{1}{a}\left(\frac{0.5\ast {Kcs}_{familiar}+{Kcs}_{new}}{Kcs_{known}+{Kcs}_{familar}+{Kcs}_{new}}+{\int}_{ilo=0}^6\left\{\sum \limits_{j=0}^n\frac{p_j.{m}_j.{e}_j.{n}_j}{c}-{d}_j\right\}\right) $$ AHIS equation describes a new model for instructional system design and develops a system based on Merrill’s Component Display Theory incorporating appropriate selection of Media, Ergonomics and Navigation Structures to produce learner engaging and effective learning outcome. A significant component of the proposed model is the integration of principles of Ergonomics having Graphic Aesthetic as one of the constituent. Graphic Aesthetic decides Unity, Proportion, Balance, Sequence, and Cohesion for interface design. Next component is selection of suitable Media as per the categorized learning content. Merrill Component Display Theory has been utilized to categorized learning content. Research shows that media effects are significant in teaching learning process. Third significant component of the model is selection of Navigation structures. Navigation structures decide learner concentration level (learner engagement), restrict them from getting disoriented in hyperspace and finally direct them to their learning objectives. Research in the field of Navigation structures reveals that it’s potential for accelerating learning, when employed with well designed interfaces. Hence, time demands development of instructional model which identifies categorized learning content(pj), principles of Ergonomics for Interface Design(ej), Media selection criteria (mj) and selection of appropriate Navigation structures(nj) and improved learner engagement by calculating learner’s prior knowledge level based on learner known concepts(kcsknown), familiar concepts (kcsfamiliar) and new concepts(kcsnew).

Poly(3-hydroxybutyrate) Production from Natural Gas by a Methanotroph Native Bacterium in a Bubble Column Bioreactor

Reducing the total cost of poly(3-hydroxybutyrate) (PHB) production as an attractive substitute for conventional petrochemical plastics still remains an unsolved problem. The aim of this research was the screening of PHB-producing microorganisms and selection of the best suitable medium for microbial growth and PHB production from methane. A new isolated methanotroph for PHB production from natural gas was studied in different media. After selection of the suitable medium, the effect of five process variables (content of nitrogen source, disodium hydrogen phosphate, methane to air ratio, seed age, and pH) on PHB production was investigated in a bubble column bioreactor. Also, hydrodynamic and mass transfer factors (flow regime, mixing time, gas hold up, and kLa) were considered. At optimum operating conditions and engineering parameters in a bubble column, PHB content in the dried biomass reached 25 % w/w. The results showed that pH is the most important variable in the selected conditions.

PENGARUH IKLAN RADIO DAN PERILAKU PENDENGAR STUDI PADA IKLAN RADIO DAN PERILAKU PENDENGAR DALAM ACARA DAKWAH ISLAM DI RADIO RASETA FM MALANG

In the field of marketing, it is in need of adequate media to convey its business promotional messages. The atmosphere of competition makes various promotional patterns to attract consumers as much as possible. Advertising, for example, this one has the characteristics and need a delicate consideration for the selection of suitable media. Advertising media that is common instead of television and print is radio. Radio ads have their own characteristics compared to other media. The company's effort to create satisfaction can be done through the quality of service provided. The maximum quality of service directly can give the maximum consumers' expectation. By having good service quality then they can fulfil all forms of demand for products or services offered to consumers. Quality of service in accordance with the expectations of consumers by itself will support the company's efforts in order to achieve the goals set by the company both short and long-term, including in the business of radio broadcasting. In the end, it can influence the listener behaviour. Da'wah is the way to invite, call and influence people to always adhere to the teachings of Allah SWT in order to obtain the happiness of life in the world and hereafter. Inviting to the way of Allah SWT is our obligation. The success of his invitation reflects the prospect and preservation of future Islamic developments, for the advancement and retreat of religion rests with the adherents of His followers. Keywords: radio advertising, listener behavior, da'wah

Role of Trace Elements on the Production of Bioethanol from Water hyacinth Hydrolysed by Ethanol Resistant Strain of Saccharomyces cerevisiae AB810

A study was carried out on the role of different trace element on the production of Bioethanol by an ethanol resistant strain Saccharomyces cerevisiae AB810 for the selection of suitable medium. It was observed that Zn2+, Mn2+ and Fe3+ were required for this ethanol resistant strain. The optimum levels of Zn2+ 5 μg/ml, Mn2+ 10 μg/ml and Fe3+ 15μg/ml were required for the maximum production of Bioethanol. But other elements mainly Cu2+, Ni2+, Co2+, Fe2+ and Mo6+ had an adverse effect on Bioethanol production by this strain. Thus, addition of necessary trace element into the fermentation medium resulted significant (p<0.001)increase in Bioethanol production of 16.6% compared to the production of Bioethanol before addition of necessary trace elements into the fermentation medium(12.0%).

Selection of suitable media and intervals of media inoculation for culturing Tubificid worms

Tubificid worms are aquatic invertebrates, belonging to the class Oligochaeta and family Tubificidae, used as an important live food for fishes. The study was conducted to culture Tubificid worms under running water in order to develop a suitable culture media and an optimum duration of media inoculation for culturing Tubificid worms. The worms were cultured under two experiments in cemented culvert system (160×25×10 cm3) for 90 days. In the first experiment the worms were cultured in three different media designated as treatment-I, treatment-II and treatment-III. The highest yield (503.39±22.98 mg cm-2) was found at 70th day of culture duration in the culture media containing a mixture of 35% mustard oil cake, 20% wheat bran, 25% cow-dung and 20% fine sand (treatment-III). Only 1.99 kg media ingredients valued BDT 29.85 were needed to yield 1 kg worms. In the second experiment, the worms were cultured at three different intervals of media inoculation i.e., 6, 10 and 15 days interval designated as treatment-I, treatment-II and treatment-III respectively using the media found best in the first experiment. Inoculation of media at 10 days interval showed significantly (P&lt;0.01) higher production (488.94±5.60 mg cm-2).DOI: http://dx.doi.org/10.3329/jbau.v10i2.14925 J. Bangladesh Agril. Univ. 10(2): 325-330, 2012