The Implementation of Water Sensitive Urban Drainage to Overcome the Risk of Flooding in Malang City

This study aims to apply Water Resources Urban Design (WSUD) technology to improve water quantity and quality in the Brantas River Watershed (DAS), especially in Oro-Oro Dowo Village, Malang City. This village was chosen because several drainage channels have decreased efficiency in accommodating water runoff during the rainy season. The application of WSUD technology is expected to reduce the high surface runoff due to the decrease in water absorption areas, so this can be an alternative to conserving the availability of water resources in terms of quantity and quality. The modeling scenarios are arranged into two types. In the first scenario, the model is made without the application of WSUD, while in the second scenario, WSUD technologies are applied. There are permeable pavement, bioretention, constructed wetlands, and green roofs. The methodology used for the application of the WSUD concept is through the SWMM (Storm Water Management Model) program. The application of WSUD technology in the case study in Oro-Oro Dowo Village is planned along the sidewalks on Jalan Rinjani, Jalan Jakarta/Jalan Simpang Ijen, Jalan Besar Ijen, and Jalan Panggung, as well as green open spaces/city forests located in the administrative area of the village. The results of this study are in the form of a comparison of the total surface water runoff before and after the implementation of WSUD for each technology. As a result, green roof technology has the potential to reduce surface runoff higher than other technologies. However, the obstacles in the application of green roofs are the cost and roof leaks. Thus, the application of a combination of permeable pavement, bioretention, and constructed wetlands can be another option. The results of the application of the WSUD combination reached 96.88%

Invitro Activity of Mineral Trioxide Aggregate Modification from Rice Hull Ash Silica and Calcium Oxide from Clamshells

The impact of SrO particles and hydroxyapatite (HA) on the characteristics of Mineral Trioxide Aggregate (MTA) from silica Rice Husk Ash (RHA) and Precipitated Calcium Carbonate (PCC) from clam shell has been studied in this research. Silica and calcium oxide are used as material to form tricalcium silicate (C3S) and dicalcium silicate (C2S) in MTA. Bi2O3 and SrO were added in MTA with 18% (w/w) total percentage. MTA was made with a sol-gel process and used catalyst NH3. After synthesis, material was calcined at 1000 oC for 3 h. HA was added at percentages of 3, 6, and 9% in 5% SrO modified MTA to see the effect of its addition on the material. The modified MTA (MTA-SrO-HA) were hydrated water using water to powder method with ratio of 3:1. The MTA-SrO5/HA6 showed higher compressive strength and dentine interaction to the commercial MTA (Proroot brand) in days 3 and 7. This material had potential as a root canal filling in dental endodontic treatment

Tempe Wastewater Treatment Using Effective Microorganism (EM) Based on Kepok Banana Peel Waste

This study aims to evaluate the effectiveness of using Lactobacillus sp. bacteria as an Effective Microorganism (EM) solution derived from kepok banana peel waste to treat tempeh wastewater. The research was conducted using four reactors with varying EM concentrations (0%, 10%, 20%, and 30%) that were processed over 16 days. The results demonstrated a significant decrease in COD, BOD, and TSS levels. Reactor R4, containing 30% EM, reduced BOD by 78.01%, increased DO to 1.31 mg/L, and raised pH to 5.86. Reactor R3, with 20% EM, achieved the highest COD reduction of 78.13%. Additionally, Reactor R2, containing 10% EM, reduced TSS by 66.81%. This study indicates that EM derived from kepok banana peel waste can effectively degrade organic pollutants in tempeh wastewater, offering an environmentally friendly treatment method

Gleichenia linearis (Burm.) C. B. Clarke Leaves Extract Potent as a Medicinal Plant Based on Its Phytochemical Profile and The Total Phenolic Content

Resam fern (Gleichenia linearis (Burm.) C.B. Clarke) is a terrestrial plant that is easy to grow and has been used for medicinal purposes as by the community empirically. This study aimed to explore the potential of Gleichenia linearis (Burm.) C.B. Clarke) as medicinal plants based on their phytochemical profiles and total phenol content of the extract. Gleichenia linearis (Burm.) C.B. Clarke leaves were extracted with aquadest and methanol as a solvent by maceration method. Phytochemical content was detected qualitatively and the total phenol content was determined using colorimetric method with Folin-Ciocalteu reagent. As the result, qualitative screening for secondary metabolic contents in Gleichenia linearis (Burm.) C.B. Clarke extract found that the aqueous extract contains alkaloids, phenols, flavonoids, tannins, triterpenoids and steroids, but the saponin and steroid were not detected. In the methanol extract, all secondary metabolites were detected except triterpenoids. The total phenol content of methanol extract was higher than that of aqueous extract with levels of 127,08 mg/g GAE and 42,32 mg/g GAE, respectively. Based on these findings, it can be concluded that the Gleichenia linearis (Burm.) C.B. Clarke leaf has the potential to be developed as a medicinal plant

The The Effect of Giving The Antioxidant Vitamin C in Tris-Egg Yolk Extender During The Preservation Period on The Quality of The Epididymal Spermatozoa of Mice (Mus musculus L.)

Spermatozoa preservation is a method used to store spermatozoa in a diluent solution such as NaCl or tris-egg yolk. However, the longer storage of spermatozoa in the diluent solution can generally form ROS (Reactive Oxygen Species). The addition of antioxidants such as vitamin C to the diluent is expected to be able to bind ROS so that they are not toxic to spermatozoa and sperm quality can be maintained during the preservation period. The purpose of this study was to determine the effect of giving the antioxidant vitamin C in tris-egg yolk diluent during the preservation period on the quality of mice epididymal spermatozoa. Vitamin C used in this study was 0.5 mg, 1 mg, and 2 mg in 100 ml of tris-egg yolk diluent. Observation of spermatozoa quality was carried out within 0 to 48 hours with a span of 12 hours. The results showed that the addition of Vitamin C concentrations of 0.5 mg, 1 mg, and 2 mg in 100 ml of tris-egg yolk diluent was able to maintain the percentage of motility and vitality, but the longer the storage the quality of spermatozoa decreased. The concentration of vitamin C 0.5 mg, 1 mg, and 2 mg in 100 ml of tris-egg yolk diluent is a good concentration to maintain the quality of spermatozoa during 12 hours of storage, the rest will decrease. Further research is needed to increase the storage time of spermatozoa by using vitamin C and tris-egg yolk

Factors Influencing the Intention of Jakarta Workers to Move to the State Capital in Kalimantan: From Systematic Literature Review to Conceptual Framework of Push-Pull-Mooring

The plan to relocate the national capital (IKN) from DKI Jakarta to Kalimantan Island will soon be realized when the population relocation is initiated by workers, one of whom is from the central ministry sector. This has never been studied before regarding the need to change residence, so the factors that encourage or restrain workers from moving to IKN have not been identified. Ideally, the transfer of these workers to IKN is based on full willingness and awareness of the conditions of life that will be lived in the future. To find out how far the intention of Jakarta workers is to move to IKN, factor analysis is needed using the Structural Equation Modeling (SEM) method. The concept used to investigate these push, pull, and restraint factors is push-pull-mooring (PPM). These three factors are important to study to obtain a model structure that can be used as a direction for IKN development. In addition, this research is also intended to find out technical information related to the reasons behind the readiness of Jakarta workers to change their domicile to IKN so that the expectations of the benefits of the new capital city can be accommodated as well as possible by interested parties, such as the central government. and regions, including the private sector

Morphological Characteristic of Adult Armigeres subalbatus from Sumbersari Jember

Armigeres subalbatus is a type of mosquito that is widely distributed in the world, including Jember Regency, Indonesia. The larval natural habitat is mainly found in trees that can hold water, adult mosquitoes can be found indoors or outdoors. In the field of health, Ar. subalbatus acts as a vector for filariasis, Japanese Encephalitis (JE) and zika. This study aims to identify the morphological characteristics of the Ar. subalbatus from Sumbersari Village, Jember Regency. Although in Indonesia there is no significant evidence of the role of Ar. subalbatus in the health sector, it is important to detect the morphological features of Ar. subalbatus to be able to detect mosquitoes properly. Knowing the exact type of mosquito can provide consideration for appropriate mosquito control methods. The method used is through the installation of ovitrap in November 2022. The ovitrap media is in the form of tap water, the ovitrap is left for 8 days. Ar. mosquitoes were found in the larval stage of the ovitrap. The larvae were brought to the Jember University Faculty of Mathematics and Natural Sciences Zoology Laboratory for hatching and data collection on the morphological characteristics of mosquitoes. The results of this study include the morphological characteristics used for the identification of Ar. subalbatus which includes the shape of the proboscis, flagelomeres on the palps, color of the scutum, border of the scutum, size of the antepronotum, bands on the pleura, prespiracular and postspiracular areas, edges of the mesepimeron, abdomen (tergum, sterna), apex of the femur, venation of the wings, alula and upper calypter of the wings

Comparison of Online and Offline Learning During The COVID-19 Pandemic using Naïve Bayes Method and C4.5

Learning is a process of interaction between educators and students who meet the elements of learning carried out in an educational environment, so that learning can develop student’s abilities, interests and talents optimally. In today's era learning is done online and inversely with offline. The purpose of this study is to analyze the comparison of percentages and classification results as well as the results of learning evaluations using the Naïve Bayes method and C4.5. This test is carried out with 4 variables and a comparison of the two methods. The results showed that the accuracy of Naïve Bayes was 74.07% and C4.5. of 77.77% so that the comparison results show that the level of accuracy of the C4.5 method is better than Naïve Bayes. The resulting importance variables are time and effectiveness as well as the results of the classification of learning decisions, namely the offline category as many as 16 data on the Naïve Bayes method and 19 data on the Decision Tree algorithm C4.5 method from 27 input testing data

The Utilization from Glucomannan of Porang Flour (Amorphophallus Muelleri Blume) as a Raw Material for Making an Edible Film

Porang (Amorphophallus Muelleri Blume) is a type of tuber that contains various nutrients, especially glucomannan. Besides as being a source of food, the high content of glucomannan can also be used as an alternative for making edible films, because it contains mannan polymers which have the ability to form fine and crystallized fibers. The purpose of this research is to determine the potential of glucomannan in porang tuber flour as a basis for making edible films. Glucomannan used with various variations (3, 6 and 9 grams). The first stages used were testing porang tuber flour and then made edible film base by carrying out various chemical analyzes based on the Japanesse Industrial Standard method. The results showed that the acquisition of water, ash and protein sequentially was 11.782%, 1.821%, 6.275% which conform to the SNI 7939;2013 standards. The 3 gram variation and 0.087 mm thickness of Glucomann showed the best water resistance value of 20.34%. The biodegradability test showed that the 6 grams variation of glucomannan had the best degradation ability, that is 100% for 12 days