Wyniki wyszukiwania - Biblioteka Nauki

1

Instructional Technologies and School Curriculum in Nigeria: Innovations and Challenges

100%

Opara J. A. , Oguzor N. S.

Perspectives of Innovations, Economics and Business

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2011

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tom 7

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nr 1

66-71

EN

The use of instructional materials in teacher training programs can provide significant input to the overall development of future teachers. Research shows that instructional materials in teacher training help student teachers to establish links between theory and practice by allowing them to make new connections between curriculum topics and the world. The new environment in which colleges develop in Nigeria has made the quality of teaching one of the main concerns and objectives. This paper discusses how to assist teachers in using instructional materials in order to help them to acquire theoretical knowledge, grounded in real practice. The paper attempts to explain the features of instructional materials and how they can assist teachers in planning quality teaching materials.

2

Comparative assessment of magnesium, copper, and zinc addition to aluminium waste casting for improving ship material behaviour

75%

Kiryanto K. , Tuswan T. , Samuel S. , Firdhaus A. , Ergana D. , Nadiyas Juneva T. , Virman Firdaus L.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2024

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tom Vol. 18 No. 2

401--408

EN

The aluminium industry for ship materials produces waste material that can pollute the environment. To protect the environment from material pollution, the aluminium waste recycling process can be used to develop ship material. This study aims to analyze the physical and mechanical characteristics of aluminium with magnesium, copper, and zinc addition. Several tests, such as chemical composition, tensile, and impact tests, will be conducted to ascertain the mechanical properties of aluminium alloy. Adding alloy material in the range of 0-10% resulted in various alloy element compositions. It can be analyzed that the aluminium contents decreased with the increase of alloy elements. The highest rise in alloy elements can be found in the addition of magnesium than in copper and zinc addition. Moreover, the mechanical tests showed that aluminium casting with magnesium, copper, and zinc additions influenced the mechanical properties of the aluminium alloy. It can be found that tensile strength and modulus of elasticity values improved with the increase of alloy addition. The addition of magnesium has better tensile properties than the addition of copper and zinc. In contrast, the impact resistance decreased with the addition of magnesium, making the alloy more brittle.

3

The use of instructional materials in physical education to enhance the students’ knowledge and skills in swimming and life-saving techniques

75%

Germo R. R. , Sarinas B. G. S. , Coo E. C. , Teruñez M. R. , Gavadan B. E. , Jardenil C. Y. , Flores J. R. P. V.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2022

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tom Vol. 16 No. 2

233--240

EN

John B. Lacson Foundation Maritime University (Arevalo), Inc. is mandated to offer aquatic-sports courses such as paddling, rowing, sailing, and swimming to equip students with needed skills essential for survival in case of emergencies. Since, there is a dearth of instructional materials in Physical Education 2 (Advanced Swimming and Life-saving Techniques), the JBLFMU-Arevalo was given a research grant by the CHED (Commission on Higher Education) known as DARE TO (Discovery Applied Research and Extension Trans/Inter-Disciplinary Opportunities) to address the problem. This DARE TO grant aimed to develop instructional materials in PE 2 that will enhance the swimming performance and life-saving techniques of students. That is why the researchers would like to test for the effectiveness of this instructional material in the form of modules over the traditional approach which is lecture in improving the students’ swimming performance and life-saving techniques in terms of their knowledge and skills. This non-equivalent control group under quasi-experimental study was utilized among the BSMT (Bachelor of Science in Marine Transportation) students. A pretest was used to determine swimming performance of the experimental and control groups. An intervention through the use of instructional materials was employed in the experimental group for the whole semester (five months) while the control group was exposed to lecture as a traditional method of instruction. After a semester, the posttest was administered. The statistical tools used were mean, standard deviation, Mann-Whitney test, and Wilcoxon-signed ranks test. The findings of the study revealed that the instructional material is effective in enhancing the swimming performance and life-saving techniques of students both in the aspects of knowledge and skills. Both the experimental and control groups were “Fair” in their knowledge pretest scores but during the posttest, the experimental group was “Good” and the control group was “Fair”. On the other hand, both the experimental and control groups were “Fair” in their skills’ pretest scores but during their posttest, the control group was “Good” while the experimental group was “Excellent”. The experimental group who used the module showed significantly better performance during the posttest both for knowledge and skills compared to the control group who did not use the module (lecture only). The study further showed significant differences in the mean gains between the experimental and control groups after the conduct of pretest and posttest in favor of the experimental group. It can be gleaned from the results that the module can enhance the knowledge and skills in swimming performance and life-saving techniques of the experimental group. It is highly recommended that this module be utilized among maritime schools offering swimming and life-saving courses.

4

Antifouling and anticorrosive protection of renewable energy marine structures with TiO2-based enamel

63%

Sanz D. , García S. , Trueba‐Castañeda L. , Boullosa-Falces D. , Trueba A.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2024

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tom Vol. 18 No. 2

419--424

EN

Biofouling is a significant problem that affects renewable energy marine structures (REMS), such as wind turbines and those designed for wave or tidal energy exploitation. Marine organisms, including algae, barnacles, and mollusks, attach themselves to the surface of these structures, which can lead to reduced efficiency and increased maintenance costs. In addition, biofouling can also cause corrosion, which can compromise the structural integrity of the offshore platforms. To combat this problem, several methods have been developed, including anti-fouling coatings, physical methods, and biological methods. Each method has its advantages and disadvantages, and the most effective solution often depends on the specific type of fouling and the location of the offshore structure. Effective biofouling prevention is essential for the safe and efficient operation of offshore structures and the protection of marine ecosystems. To prevent the spread of invasive species, an innovative ceramic coating has been designed and tested in accordance with ASTM-D3623 procedure. The investigation results revealed that, after four years of experimentation in a real environment, the biofouling growth observed in the splash zone of the antifouling paint was 129.76% higher than that of the titanium-based ceramic coating and it is expected that this difference will continue to grow over time.