GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Application of the Global Warming Learning System (GWLS) as an Effort to Improve Student’s Learning Outcomes and Critical Thinking Ability
    Universitas Negeri Semarang ; 2024
    In:  Physics Communication Vol. 8, No. 1 ( 2024-02-28), p. 30-37
    Details
    In: Physics Communication, Universitas Negeri Semarang, Vol. 8, No. 1 ( 2024-02-28), p. 30-37
    Abstract: This Classroom Action Research (CAR) aims to improve learning outcomes and critical thinking skills of class X-K SMA Negeri 6 Semarang, through the application of adaptive teaching materials Global Warming Learning System. The learning model used is Problem Based Learning with group investigation method (cycle I) and Project Based Learning with product differentiation (cycle II). CAR is carried out in two cycles, where each cycle consists of four activities, namely action planning, action implementation, observation and reflection which adopts the Kemmis and Taggart models. Data collection techniques used in this study were observation, tests, questionnaires and interviews. Data analysis used a qualitative descriptive approach based on educational outcomes and improving students' critical thinking skills. The results show that there has been an increase in educational outcomes and critical thinking skills (pre-cycle to cycle I) and (cycle I to cycle II). Evidenced by the results of studying at first cycle, which was completed by 15 students (41.67%) and the students' critical thinking skills, the average 71.59% was high category. Meanwhile the educational outcomes of physics cycle II which were completed were 28 students (77.78%) and the ability to think critically with an average 78.88% was high category
    Type of Medium: Online Resource
    ISSN: 2528-598X , 2528-5971
    URL: Issue
    URL: Article
    DOI: 10.15294/physcomm.v8i1
    DOI: 10.15294/physcomm.v8i1.44920
    Language: Unknown
    Publisher: Universitas Negeri Semarang
    Publication Date: 2024
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Design and build a mechanical energy conservation law KIT with Arduino microcontroller
    UIN Walisongo Semarang ; 2021
    In:  Journal of Natural Sciences and Mathematics Research Vol. 7, No. 2 ( 2021-12-31), p. 51-58
    Details
    In: Journal of Natural Sciences and Mathematics Research, UIN Walisongo Semarang, Vol. 7, No. 2 ( 2021-12-31), p. 51-58
    Abstract: Tools as media play an important role in learning physics to explain concepts, so that students can more easily build mastery of physics material and develop their skills. This study aims to design and realize a physics learning tool. The method used is research and development (Research and Development). This learning tool is in the form of a plane where the direction of the object's trajectory varies can move up, down, and is accompanied by a slope setting (30˚, 45˚, 60˚ or 90˚). Equipped with a speed output setting program based on 3 points whose speed will be measured and the distance between the points can be changed. Its function is to understand and prove the law of conservation of mechanical energy, understand the relationship between potential energy and kinetic energy experienced by objects and determine the speed of objects and their height position. This learning tool is expected to attract students' interest in learning physics. The design of this KIT Law of Conservation of Mechanical Energy can prove the conservation of mechanical energy. When an object is moving downwards, the object's height decreases but its velocity increases. On the other hand, if the object is moving upwards, the height of the object will increase, but the velocity of the object will decrease. This tool still has a relative error rate of 23.92% in free fall motion, 31.87% in falling motion on an inclined plane, and 32.79% in vertical upward motion.©2021 JNSMR UIN Walisongo. All rights reserved.
    Type of Medium: Online Resource
    ISSN: 2460-4453 , 2614-6487
    URL: Article
    DOI: 10.21580/jnsmr.2021.7.2.8639
    Language: Unknown
    Publisher: UIN Walisongo Semarang
    Publication Date: 2021
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Pembuatan dan Karakterisasi Plastik Biodegradable Berbahan Dasar Ampas Ubi Kayu dan Kulit Udang
    LP2M Universitas Islam Negeri (UIN) Syarif Hidayatullah Jakarta ; 2019
    In:  Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Vol. 2, No. 2 ( 2019-12-31), p. 119-128
    Details
    In: Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics, LP2M Universitas Islam Negeri (UIN) Syarif Hidayatullah Jakarta, Vol. 2, No. 2 ( 2019-12-31), p. 119-128
    Abstract: Penelitian pemanfaatan fabrikasi plastik biodegradable telah dikembangkan karena bersifat ramah lingkungan dan terbarukan. Tujuan penelitian ini untuk membuat plastik biodegradable dengan filler berupa (kitosan dari limbah kulit udang dan tepung ampas ubi kayu dari limbah ampas ubi kayu) dengan penambahan sorbitol sebagai matrix, serta menganalisa menggunakan uji kuat tarik dengan standar ASTM D-638M, FTIR dan biodegradasi. Hasil penelitian ini didapatkan 4 sampel plastik biodegradable dengan variasi perbandingan komposisi massa filler (kitosan:tepung ampas ubi kayu) masing-masing sampel yaitu A (1,30: 0,70) gr, B (1,35: 0,65) gr, C (1,40: 0,60) gr dan D (1,45: 0,55) gr. Dari hasil uji sifat mekanik didapatkan nilai kuat tarik masing-masing sampel yaitu A (1,01±0,11) MPa, B (1,32±0,08) MPa, C (1,66±0,03) MPa dan D (1,97±0,06) MPa. Sedangkan nilai persen elongasi dari masing-masing sampel yaitu A (23,58 ± 1,39) %, B (16,67 ± 0,20) %, C (11,01 ± 1,32) % dan D (8,11 ± 0,72) %.  Sedangkan nilai persen elongasi dari masing-masing sampel yaitu A (22.89%), B (15.90%), C (10.56%) dan D (7.85%). Penambahan komposisi massa kitosan terbukti mampu meningkatkan nilai kuat tarik dan modulus young plastik biodegradable, namun untuk nilai persen elongasinya menurun. Uji FTIR menunjukkan bahwa di dalam plastik biodegradable terdapat gugus fungsi C-H, O-H, C≡C, C=N, C=C dan C-O yang merupakan gugus organik. Tingginya intensitas ikatan C≡C pada sampel dengan komposisi massa kitosan paling banyak menyebabkan ikatan lebih sukar merenggang/diputus, karena memiliki energi ikatan rata-rata yang tinggi, sehingga menambah nilai kuat tarik dan memperlambat proses biodegradasi.
    Type of Medium: Online Resource
    ISSN: 2621-489X , 2621-0215
    URL: Article
    DOI: 10.15408/fiziya.v2i2.12407
    Language: Unknown
    Publisher: LP2M Universitas Islam Negeri (UIN) Syarif Hidayatullah Jakarta
    Publication Date: 2019
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    The effect of drying temperature on the characteristics of biodegradable plastic from Cassava pulp and Chitosan
    UIN Walisongo Semarang ; 2021
    In:  Journal of Natural Sciences and Mathematics Research Vol. 7, No. 1 ( 2021-06-30), p. 7-13
    Details
    In: Journal of Natural Sciences and Mathematics Research, UIN Walisongo Semarang, Vol. 7, No. 1 ( 2021-06-30), p. 7-13
    Abstract: Conventional plastics made from polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polystyrene, and poly (ethylene terephthalate) are difficult to decompose. Bioplastics can reduce the amount of toxic waste generated from biological materials other than petroleum.  The combination of cassava pulp and chitosan can be used as a candidate for the manufacture of biodegradable plastics. The optimal drying temperature can produce biodegradable plastics that have good quality. The method used to determine the effect is the mechanical properties test with ASTM D-638M standard and degradation test. The results of this study obtained 6 samples of biodegradable plastic with variations in temperature A=40˚C, B=50˚C, C=60˚C, D=70˚C, E=80˚C and F=90˚C. From the results of the mechanical properties test, the tensile strength values of each sample are A = 0,84 MPa, B = 1,78 MPa, C = 2,24 MPa, D = 1,58 MPa, E = 1,23 MPa and F =0,57 MPa. While the percent elongation value of each sample is A = 11,09%, B = 21,62%, C = 30,25%, D = 15,94%, E = 13% and F = 7,2%. The drying temperature in the process of making biodegradable plastics can affect its mechanical properties, namely the higher the drying temperature used, the lower the tensile strength value and the percent elongation, this is because high temperatures can damage the chemical structure and evaporated sorbitol which serves to increase flexibility. The higher the drying temperature also causes the biodegradable plastic to take longer to degrade. Sample A with the lowest temperature degraded the fastest for 28 days, while sample F with the highest temperature degraded the fastest for 46 days.©2021 JNSMR UIN Walisongo. All rights reserved.
    Type of Medium: Online Resource
    ISSN: 2460-4453 , 2614-6487
    URL: Article
    DOI: 10.21580/jnsmr.2021.7.2.8389
    Language: Unknown
    Publisher: UIN Walisongo Semarang
    Publication Date: 2021
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...