Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
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Kepadatan Populasi Monyet Ekor Panjang (Macaca fascicularis) di Tahura Banten
No full textTaman Hutan Raya (Tahura) Banten memiliki potensi yang tinggi dalam hal ekonomi maupun ekologi. Kekhasan ekosistem ini membuat tingginya keanekaragaman flora dan fauna pada kawasan tersebut. Salah satu fauna mamalia yang biasa ditemui di kawasan ini adalah Monyet Ekor Panjang (Macaca fascicularis). Fungsi ekologi keberadaan Macaca fascicularis diantaranya sebagai agen penyemai dan penyebar biji tanaman serta menjadi pengendali populasi serangga. Namun jika populasi tidak terkendali maka akan berdampak pada keseimbangan ekosistem khususnya mempengaruhi perilaku Macaca fascicularis menjadi agresif dan kecenderungan dianggap hama. Oleh karenanya penelitian ini bertujuan untuk mengetahui kepadatan populasi Macaca fascicularis dikawasan Tahura Banten. Analisis data populasi menggunakan persamaan King’s method yang kemudian dianalisis secara deskriptif. Hasil pengamatan ditemukan dua kelompok Macaca fascicularis, dimana estimasi populasi tertinggi ditemukan pada kelompok 1 di lokasi Blok Pemanfaatan yaitu 47,8 individu/ha dengan kepadatan populasi sebesar 4,78 individu/ha. Sedangkan, estimasi populasi yang paling sedikit ditemukan pada kelompok 2 di lokasi sekitar area Curug Putri sebesar 28,9 individu/ha dengan kepadatan populasinya 2,89 individu/ha. Dari hasil analisa tersebut ditemukan bahwa Macaca fascicularis banyak ditemui di area yang memiliki keanekaragaman jenis tumbuhan tinggi dan area yang minim perjumpaan dengan manusia. Oleh karena itu, penelitian mengenai jumlah populasi Macaca fascicularis ini diharapkan menjadi informasi penting, sehingga dapat digunakan untuk memantau dan mengelola populasi Macaca fascicularis dikawasan Tahura Banten.
Kata kunci :
Taman Hutan Raya (Tahura) Banten memiliki potensi yang tinggi dalam hal ekonomi maupun ekologi. Kekhasan ekosistem ini membuat tingginya keanekaragaman flora dan fauna pada kawasan tersebut. Salah satu fauna mamalia yang biasa ditemui di kawasan ini adalah Monyet Ekor Panjang (Macaca fascicularis). Fungsi ekologi keberadaan Macaca fascicularis diantaranya sebagai agen penyemai dan penyebar biji tanaman serta menjadi pengendali populasi serangga. Namun jika populasi tidak terkendali maka akan berdampak pada keseimbangan ekosistem khususnya mempengaruhi perilaku Macaca fascicularis menjadi agresif dan kecenderungan dianggap hama. Oleh karenanya penelitian ini bertujuan untuk mengetahui kepadatan populasi Macaca fascicularis dikawasan Tahura Banten. Analisis data populasi menggunakan persamaan King’s method yang kemudian dianalisis secara deskriptif. Hasil pengamatan ditemukan dua kelompok Macaca fascicularis, dimana estimasi populasi tertinggi ditemukan pada kelompok 1 di lokasi Blok Pemanfaatan yaitu 47,8 individu/ha dengan kepadatan populasi sebesar 4,78 individu/ha. Sedangkan, estimasi populasi yang paling sedikit ditemukan pada kelompok 2 di lokasi sekitar area Curug Putri sebesar 28,9 individu/ha dengan kepadatan populasinya 2,89 individu/ha. Dari hasil analisa tersebut ditemukan bahwa Macaca fascicularis banyak ditemui di area yang memiliki keanekaragaman jenis tumbuhan tinggi dan area yang minim perjumpaan dengan manusia. Oleh karena itu, penelitian mengenai jumlah populasi Macaca fascicularis ini diharapkan menjadi informasi penting, sehingga dapat digunakan untuk memantau dan mengelola populasi Macaca fascicularis dikawasan Tahura Banten
Implementasi Kombinasi Secret Sharing dan Steganografi Citra Least Significant Bit dengan QR Code
Full text linkInformation security becomes very important as long as information technology continues to develop. This research combines Shamir Secret Sharing (Scheme ( , )) cryptography and Least Significant Bit (LSB) steganography to improve information security in the aspect of confidentiality. The need to collect a minimum number of shares, Scheme ( , ) method makes it more difficult for hackers to reconstruct the message. The implementation of the combination of cryptography and steganography produces an application program created with Python programming languange version 3.11.2, where the Scheme (t,w) used is and RGB image as the cover object of LSB method. In determining the location of image pixels that will be inserted into the message, random numbers generated by the Linear Congruential Generator (LCG) algorithm is used. The program can create a share of text messages with a maximum of 8 characters contained in ASCII characters 32 to 126. The result obtained from the share construction program is QR codes that refers to the stego image that has been inserted by the share, so that the existence of information in the QR code is difficult to know. The program can also reconstruct the message back from QR codes
Phytochemical Screening of Deep Eutectic Solvent Extract of Butterfly Pea (Clitoria ternatea L.)
Full text linkThis study aims to evaluate the phytochemical content of butterfly pea (Clitoria ternatea L.) extract using the ultrasound-assisted extraction (UAE) method with a deep eutectic solvent (DES) composed of choline chloride and citric acid in a 1:1 molar ratio, with the addition of 10% water. The extraction process was carried out for 30 minutes at a temperature of 50°C. Phytochemical screening results showed that the DES extract of butterfly pea contains various bioactive compounds, including alkaloids, flavonoids, tannins, terpenoids, and saponins, each exhibiting distinct color reactions or precipitates during testing. Flavonoids, particularly anthocyanins, produced a stable red color under acidic conditions and upon interaction with metal ions, indicating potential as natural colorants and antioxidants. Tannins formed dark green complexes with FeCl₃, while terpenoids produced a reddish-brown color as a result of the reaction with Salkowski reagent. Saponins generated stable foam due to their amphiphilic nature, indicating surfactant activity beneficial for cosmetic formulations. Overall, these findings suggest that the DES-based butterfly pea extract holds strong potential as a natural bioactive source for cosmetic applications, particularly due to its prominent flavonoid content and antioxidant activity
Formulasi kosmetik pewarna kuku peel off dari ekstrak Spirulina platensis sebagai pewarna alami
Full text linkSpirulina platensis adalah salah satu jenis mikroalga golongan cyanophyta yang memiliki kandungan fikosianin. Pemanfaatan Spirulina platensis yang masih terbatas dalam formulasi kosmetik terutama pada senyawa fikosianin yang merupakan pigmen warna alami. Penelitian ini bertujuan untuk meneliti ekstrak Spirulina platensis sebagai alternatif pewarna pada formulasi kosmetik pewarna kuku peel off dengan varian konsentrasi sehingga menghasilkan sediaan kosmetik pewarna kuku yang disukai panelis. Ekstraksi Spirulina platensis menggunakan metode freezing-thawing. Optimasi ekstrak Spirulina platensis dilakukan dengan konsentrasi 10%, 20%, 30%, dan 40%. Evaluasi fisik yang dilakukan menunjukan hasil yang baik dari segi organoleptik yakni berwarna hijau, bertekstur kental dan beraroma ocean fresh, memiliki homogenitas yang baik, pH pada rentang 5,7 – 5,9, daya sebar pada rentang 5,7 – 6,6 cm, waktu kering pada rentang 12,2 – 12,4 menit, daya lekat pada rentang 13,9 – 17,7 detik, dan viskositas pada rentang 11.589 – 13.877 cPs. Pada data uji iritasi dihasilkan F1, F2, F3, dan F4 menunjukan tidak terjadinya iritasi di setiap formula. Berdasarkan uji kesukaan, dihasilkan formula empat dengan konsentrasi ekstrak Spirulina platensis 40% paling disukai oleh panelis. Banyaknya konsentrasi ekstrak Spirulina platensis pada pewarna kuku meningkatkan kesukaan panelis terhadap pemilihan pewarna kuku. Berdasarkan uji stabilitas fisik selama 6 siklus pada suhu sediaan 4˚C dan 40˚C menunjukan seluruh formula memiliki organoleptik, homogenitas, pH, daya sebar, waktu kering, daya lekat, dan viskositas yang stabil
Correlation Analysis of Landslide Disaster with Land Tenure (Case Study: Wonosobo Regency)
Full text linkIndonesia is a country that often experiences various kinds of natural disasters, one of which is landslides. Wonosobo Regency is a district that is prone to landslides considering its geographical conditions with steep slopes and high rainfall. Landslides are disasters that are directly related to changes in soil and soil conditions. This is unconsciously related to land rights, one of which is land tenure. In this research, a correlation study was conducted to determine the relationship between the level of knowledge about landslides and the level of knowledge about land tenure. The test uses the Spearman rank test. The result of this research is that there is a relationship between the level of knowledge about landslides and the level of knowledge about land tenure
EFFECT OF VARIOUS CONCENTRATION ON PHYSICAL PARAMETER OF FEMININE HYGIENE SWEET BASIL LEAF EXTRACT (Ocimum Basilicum) : FOAM STABILITY AND HEIGHT EVALUATION STUDIES
Full text linkSweet basil or Kemangi (Ocimum basilycum) is known not only for its distinct aroma or flavor but also its therapeutic potential. Due to phytochemical ingredients, sweet basil become promising material for cosmetics and personal care industries such as feminime hygiene. This study aims to investigate the effect of varying concentration on foam stability from sweet basil leaf extract feminine hygiene. The extract was formulated into feminime hygiene with varying concentrations from 20%, 25%, 30%, 35% and 40%. Each formulas were evaluated on height evaluations and foam stability, analyze with Kruskal-Wallis test and Mann-Whitney test, respectively. The results was statistically significant for each parameters between formula I (20%) and formula III (30%)
Photometric determination of asteroid 9 Metis rotation period using the OZT-ALTS robotic telescope
Full text linkAsteroid 9 Metis, a prominent main-belt object with an irregular shape and diameter of approximately 190 km, provides insights into early solar system formation and evolution. We determined its synodic rotation period through ground-based photometric observations using the OZT-ALTS robotic telescope at Institut Teknologi Sumatera (Itera). Observations were conducted on May 6, 2025, spanning 6.2 hours continuously. We analyzed 125 calibrated light frames using aperture photometry to construct a light curve. Period analysis employed the Lomb-Scargle periodogram method, suitable for unevenly spaced astronomical data. The periodogram revealed a dominant peak at 2.51 hours. However, the folded light curve exhibited characteristic double-peaked structure with two maxima and minima per cycle, indicating this represents half the actual rotation period. The true synodic rotation period was therefore determined as 5.01 ± 1.01 hours. This result agrees with previously reported values (~5.08 hours), confirming that asteroid 9 Metis has an elongated shape or heterogeneous surface reflectivity. Our study demonstrates that accurate rotational periods can be obtained using moderate-sized telescopes and modern photometric techniques for kilometer-scale asteroids. These findings contribute to understanding asteroid rotational dynamics and provide reference data for future shape modeling studies
Analyzing sediment characteristics between intertidal and supratidal zones at Kelapa Kunjir Beach, Lampung Indonesia
Full text linkThe differing hydrodynamic processes between the intertidal and supratidal zones significantly influence the distribution of grain size and sediment types. This study aims to analyze the sediment fractions and types based on granulometric parameters in both zones. The method involved collecting sediment samples from five stations in each zone, followed by dry sieving laboratory analysis and granulometric statistical calculations. The results show that the intertidal zone is dominated by gravelly sand, with gravel ranging from 20.4% to 35.5% and sand from 61.3% to 78.7%, with no silt or clay detected. The supratidal zone exhibited more variation, with gravel ranging from 16.4% to 38.2%, sand from 41.3% to 70.6%, and silt from 2.3% to 39.2%. Sorting values ranged from 1.5 to 2.3, skewness from −0.8 to −0.07, and kurtosis between 1.7 and 4.0. Sediment types in the intertidal zone were predominantly gravelly sand, while the supratidal zone consisted of gravelly mud and muddy sand. It is concluded that differences grain size distribution and sediment types between the two zones are influenced by variations in environmental energy. The intertidal zone reflects moderate to high-energy conditions, while the supratidal zone indicates a lower-energy environment with potential for fine material accumulation
EVALUASI KINERJA LALU LINTAS DAMPAK PEMBANGUNAN FLYOVER CIROYOM KOTA BANDUNG
Full text linkThe increase in vehicle volume in Bandung City, particularly in the Ciroyom area adjacent to the railway and market area, has resulted in significant traffic congestion. This has prompted the construction of the Ciroyom flyover, which is expected to improve travel time efficiency and smooth vehicle traffic in the surrounding area. This study aims to evaluate travel time efficiency and analyze public perceptions of the Ciroyom flyover. This study uses a mixed-method approach, combining quantitative analysis of vehicle travel time before and after the flyover through descriptive statistics, with a qualitative approach through field surveys and questionnaires distributed to road users and residents. Performance evaluations were conducted on five variables: travel time efficiency, congestion, traffic smoothness, driving comfort, and driving safety. The results show that all variables obtained evaluation scores at the "fairly good" level, with vehicle travel times ranging from 2-4 minutes and respondents feeling helped by the flyover. Although not yet optimal, the Ciroyom flyover has proven quite effective in improving mobility and safety, also provides a strong foundation for the development of similar infrastructure in the future
In Vitro Antidiabetic Activity of Herbal Beverage Containing Turmeric and Guava Leaves
Full text linkHerbs have widely used in beverages. This study aimed to develop an herbal beverage for diabetics and to study the effect of guava leaves (G) and turmeric (K) proportions in an herbal beverage mixture on the inhibition of α-amylase and α-glucosidase enzyme activity and the organoleptic quality of the beverage. The proportions of G and K used in the beverage were C1: 0% G and 100% K; C2: 20% G and 80% K; C3: 40% G and 60% K; C4: 60% G and 40% K; C5: 80% G and 20% K; C6: 100% G and 0% K. The greater the proportion of K, the inhibition of the α-amylase enzyme increased. Increasing G proportion from 0% to 20% increased the inhibition of the α-glucosidase enzyme by 38.49% (from 21.05% to 59.54%), but no changes were observed on G proportion higher than 20%. Panelists’ reacted ‘dislike’ or ‘neither like nor dislike’ to the taste, aroma, and color of the beverages. The best beverage formulation with high inhibitory activities against α-amylase and α-glucosidase enzymes (64.15% and 68.58%, respectively) was a mixture of 40% G and 60% K, which was assessed to be ‘neither liked nor disliked’ in terms of taste, aroma, and color.Rempah-rempah banyak digunakan dalam minuman. Penelitian ini bertujuan untuk mengembangkan minuman herbal bagi penderita diabetes dan mempelajari pengaruh proporsi daun jambu biji (G) dan kunyit (K) dalam campuran minuman herbal terhadap penghambatan aktivitas enzim α-amilase dan α-glukosidase serta kualitas organoleptik minuman tersebut. Proporsi G dan K yang digunakan dalam minuman tersebut adalah C1: 0% G dan 100% K; C2: 20% G dan 80% K; C3: 40% G dan 60% K; C4: 60% G dan 40% K; C5: 80% G dan 20% K; C6: 100% G dan 0% K. Semakin besar proporsi K, maka penghambatan enzim α-amilase semakin meningkat. Peningkatan proporsi G dari 0% menjadi 20% meningkatkan penghambatan enzim α-glukosidase sebesar 38,49% (dari 21,05% menjadi 59,54%), tetapi tidak ada perubahan yang diamati pada proporsi G yang lebih tinggi dari 20%. Panelis bereaksi 'tidak suka' atau 'tidak suka maupun tidak suka' terhadap rasa, aroma, dan warna minuman. Formulasi minuman terbaik dengan aktivitas penghambatan tinggi terhadap enzim α-amilase dan α-glukosidase (masing-masing 64,15% dan 68,58%) adalah campuran 40% G dan 60% K, yang dinilai 'tidak suka maupun tidak suka' dalam hal rasa, aroma, dan warna