Open Access Short Research Article

Computer Assisted Teaching and Learning (CATL) to Improve Academic Achievement and Skill in Physics Education

Mustafa Alibasyah, Abdullah Husin

Advances in Research, Page 1-5
DOI: 10.9734/AIR/2016/29051

Computer assisted learning (CAL) has been implemented in schools to improve the quality of education. However, the application of CAL without the assistant of teachers is unsatisfactory. This study introduces computer assisted teaching and learning (CATL) with the teacher’s assistance. A test which involved 34 students and 12 observational learning activities for physics learning session at 2 junior high schools in Aceh province Indonesia was conducted. On average, students scored 74.79 when learning physics using CATL, compared to using CAL which scored only 71.23. Teachers’ assistance in CATL can provide a meaningful impact on improving academic learning achievements. Based on interviews, 8 students noted that CATL is better, easier, and more fun. 87.5% of students and 100% of interviewed teachers want CATL to be applied in the physics subject. Thus CATL can improve skills and academic achievements in teaching and learning physics.

Open Access Original Research Article

Development of Cellular Manufacturing Model for Product Varieties Management in Industries

B. O. Akinnuli

Advances in Research, Page 1-17
DOI: 10.9734/AIR/2016/27515

The increasing demand of customers in terms of speed of service and reduced cost at higher quality has generated a new platform on which manufacturing companies compete. The purpose of this report is to develop a Cellular Manufacturing Model, which is actually an application of group technology, which has been described as a stepping stone to achieving world class manufacturing status. Required strategic decisions were identified and the mathematical models required were developed. The models were integrated to form the logic with the aid of a flow chart. The formulated model was implemented with a software using C – Sharp (C-#). The identified strategic decisions which are the input variables are: Quantity input total cost rate, waiting time, setup time, work start time, delivery time, cycle time and average product demand. Processing this data using the developed mathematical models resulting into total productivity, production lead time, unit cost, cycle time, and delivery time determination. Statistical analysis of both input and out data was carried out the correlation coefficient (r) of the data was 0.95 which gives a very strong relationship. Graphs were also drawn to represent the output quantity against value added time and also graph of delivery ready goods against total cost rate. At the end of it all, a useful way of implementing this aspect of cellular manufacturing was suggested.

Open Access Original Research Article

Fruits in Craft Beer: A Study to Evaluate the Impact of Fruits on the pH in the Brewing Process and the Breweries Waste Water

S. Ritter, K. Dölle, M. Van Bargen, J. Piatkowski

Advances in Research, Page 1-8
DOI: 10.9734/AIR/2016/30228

Problems in the waste water treatment system of a local micro-brewery brought up the question whether fruits as additional ingredients can have a significant influence on the pH and the Chemical Oxygen Demand (COD) of the waste water. To reach an answer to this question, five batches of beer were brewed in August 2016 in the laboratory of the College of Environmental Science and Forestry in Syracuse, New York. Four of these different fruits (peaches, blueberries, banana and orange peel) were added for the secondary fermentation. Once the fermentation process was done, the beer was filtered and the retentate was diluted to simulate the cleaning process of the filter. The pH level was monitored in several steps during the brewing and the COD was measured for the simulated wash water. The latter is commonly used to express the amount of organic pollutants found in drinking or waste water. It is an indicator of the mass of oxygen consumed by a certain volume of solution and expressed in milligrams per liter.

The evaluation of the data showed that the pH of the beer after the secondary fermentation varied between 3.82 – 4.83 and 4.43 – 6.60 in the wash water. The COD turned out to be between 1937 mg/l and 2917 mg/l in the wash water.

Open Access Original Research Article

Phytotoxicity, Bioload and Heavy Metal Evaluation of a Selected Municipal Dumpsite in Obosi, Anambra State, Nigeria

Martin O. Anagboso, Michael U.Orji, Amechi S. Nwankwegu, Fidelis Azi

Advances in Research, Page 1-7
DOI: 10.9734/AIR/2016/30536

Aims: To evaluate the pollution index of municipal solid waste dumpsite site located at Obosi metropolis of Anambra state, Nigeria.

Study Design: Study of the dump site bioload level using sabouraud dextrose agar and nutrient agar, heavy metal determination using atomic absorption spectrophotometry and assessment of the ecological impact of the dump using two selected agricultural plants maize (Zea mays) and beans (Vicia faba).

Place and Study Duration: Department of Applied Microbiology and Brewing Nnamdi Azikiwe University, PMB 5025, Awka, Anambra state, Nigeria between Februarys, 2014 to September, 2015.

Methodology: Sample collection from two locations in Obosi, Nigeria, the dumpsite and sample collected 1.10 km away from the dumpsite was used as control, determination of the physicochemical characteristics of the two soils, microbial enumeration, chemical analysis and growing of plants (phytotoxicity assay).

Results: Results showed that relatively alkaline pH was observed in the dumpsite soil (DSS) while slight acidity was reported in the control soil (CSS). The list of heavy metals and minerals quantified in this work via atomic absorption spectrophotometry (AAS) included mercury, lead, arsenic, cadmium zinc, chromium, aluminum, iron, manganese, magnesium, calcium, sodium  and potassium. The heavy metal concentration of dumpsite was higher than that of control. The microorganisms isolated from the present study included; Bacillus subtilis, Aspergillus candidus, and Aspergillus flavus.  In the phytotoxicity assessment, the maize grain and beans exhibited good germination conditions in CSS with an extremely poor germination performance in DSS due to heavy metal toxicity as well as alteration of other physicochemical status such as pH, texture and particle size configurations

In general, seed germination performance was higher in the maize (Zea mays) than beans (Vicia faba) with germination indices of 89.7% and 51.2% respectively.  2:1 DSS and CSS soil modification gave the best germination. Statistical analysis showed that there was a significant difference in the percentage seed germination at p<0.05.

Conclusion: Present study showed that Obosi dumpsite is polluted with heavy metals particularly mercury, chromium, lead and cadmium yielding very high in concentrations of heavy metals. If proper environment action is not carried out this will affect the surrounding agricultural soil and  jeopardize human health in the area.

Open Access Original Research Article

Strengthening the Citrus Value Chain through Innovative Approach

Joel Bonales Valencia

Advances in Research, Page 1-10
DOI: 10.9734/AIR/2016/30434

Mexico has a tremendous potential in the agricultural sector to venture into international markets for its excellent environmental conditions, in addition to a high and diverse agricultural production, especially in lemon’s production and exportation; unfortunately, despite the competitive advantages of the country, agricultural marketing has diminished by problems that have blocked the development of the lemon industry.

The research was conducted in the Valley of Apatzingan, integrated with ten municipalities that concentrate most of the lemon production of Michoacan. The object of the study were 4200 producers, 50 packers, 10 industries, 13 suppliers and 15 nurseries. This region is at the top in agricultural production in Michoacan, and the problems the lemon production has faced, despite its benefits, it hasn’t been adequately promoted in international marketing; thereby preventing further integration of innovation networks.

Based on the above, the objective of this paper, is to describe which are the variables that drive the increase in export competitiveness. Lemon-System-Product’s of Michoacan state, based on innovation networks and actors.

For the design of methodology, we propose an approach, the following hypothesis: There is a positive relationship between innovation network and the actors who compose, reflecting in the export competitiveness of Lemon-System-Product’s in Michoacan’s state.

This methodology puts in evidence twofold: the dynamics of technological innovation and analyzing innovation networks, exchanging information between both approaches to enrich the analysis.

The effects of the producer group and location on variables related with the characteristic of the producer, the productive orientation of the production unit and technology adoption indices were assessed with analysis of variance.