The Effect of Magnetic Stirring Duration and Ascorbic Acid Concentration on the Yield of Reduced Graphene Oxide Isolated from East Kalimantan Bituminous Coal

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East Kalimantan bituminous coal has a carbon composition of 70.24%, indicating a crystal structure of graphite layers. This makes it a viable material for creating reduced graphene oxide (r-GO), which has multiple advantages in various properties and can be employed in numerous technological applications. RGO is obtained by nearly eliminating oxygen functional groups in graphene oxide (GO) through sonication for 3 hours at pH 4. The yield with the lowest value at a 10% concentration of ascorbic acid and 50 minutes of magnetic stirring was selected as optimal. To characterize the resulting product, FTIR was utilized and revealed that O-H (84.21%), C=C (63.04%), and C-O-C (61%) had the highest %T. Technical abbreviations were explained upon first use. Energy-dispersive X-ray (EDX) analysis demonstrated a 90.6% increase in carbon content from 40.159% in GO to 76.554% in r-GO. In parallel, oxygen content decreased from 40,973% in GO to 17.551% in rGO, marking a 57.16% decrease. The morphology of the resulting rGO closely resembled the reference. Additionally, rGO exhibited a C:O ratio of 4.378, surpassing the C:O ratio of GO, which was 1.02. RGO density and pH value were 1.45 g/cm3 and 2, respectively.

 

Development of A Higher-Order Thinking Skills (HOTS) Instrument to Measure Student’s Critical Thinking Abilities in Class V Elementary School

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This research and development aims to produce a feasible and practical Higher Order Thinking Skills (HOTS) instrument to measure students’ critical thinking skills in grade V elementary school mathematics subjects. This research method is development research that refers to the design of Borg & Gall. The research was conduct in class V SDN 3 Sumberejo. Feasibility testing of instruments developed in this study uses expert tests, validity tests, reliability tests, differentiation power tests and difficulty tests. The results of this study showed that an eight-question instrument was obtained, which is suitable for use. The practicality of the instrument, based on the response of educators and learners as practitioners, yielded a very practical assessment. This demonstrates that the developed HOTS instrument is feasible and practical for measuring the critical thinking ability of fifth-grade elementary school students.

Application of Floating Maxim on Implicature in Japanese Language

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Cooperative principle is a principle in communication to make speakers and listeners to be coordinative for achieve communication’s aims. In cooperative principle, there are maxims accordance cooperative principle. Speakers must give truth speech, be brief, do not more informative than its required, and make it clear. Sometimes people didn’t contribute in communication, and make utterance float the maxims. This floating maxim creates the implicature. Implicature is one of pragmatic’s scope discussed about conveyed meaning in utterances. Meanwhile pragmatic is a scope of speakers meaning which implicature has truth conditional meaning conveyed by speakers. But, only conversational implicature create by floating maxim. Implicature can be find in every language such as Japanese. It supported by ideology called aimai to make ambiguous speech. As the background, this research is to find floating maxim in implicature in Japanese. Floating maxims by Grice used for theory in this research. The method that used was descriptive analysis. Data source in anime and Japanese drama to find implicature in Japanese. The result of this research is maxim of relation were founded dominant. It according to the aims of communication, and other side speaker has different aims with their partner. Floating of relation maxim used for for showing disinterest, admiration, and sarcasm.

Propose Marketing Strategies of Oasis Siliwangi Sport Hotel to Increase Brand Awareness and Purchase Intention

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After the outbreak of the COVID-19 pandemic in 2020, there was a rise in tourist visitors from different parts of Indonesia to Bandung, resulting in a direct boost in the occupancy rate of star hotels in the city. Because of this growth, numerous hotels developed, with the majority being 3-star establishments. The Oasis Siliwangi Sport Hotel is a three-star establishment in Bandung, offering a range of facilities and an ideal location. Oasis Siliwangi Sport Hotel in Bandung is now struggling with a lack of brand awareness, resulting in potential customers being unaware of the hotel’s existence and room occupancy rates. Consequently, this has led to a decline in the intention to make reservations. The objective of this study is to determine the variables that influence the level of brand awareness for Oasis Siliwangi Sport Hotel and develop effective marketing strategies to enhance the likelihood of customers choosing to stay at Oasis Siliwangi Sport Hotel. Data collection comes from primary data and secondary data. The primary data collection strategy is quantitative, utilizing a questionnaire for consumer analysis and hypothesis testing. Secondary data will be acquired from national and international scientific journals, previous research, book literature, government reports, and other reliable source of internet sites. The survey was disseminated to 217 potential target market participants with prior experience lodging at the hotel. The gathered data is analyzed using SMART PLS. The research findings indicate that Advertising and Social Media Marketing positively influence Brand Awareness. Furthermore, brand awareness, price, and facilities influence customer’s purchase intention. Based on these findings, several recommendations and strategies are made. These include create exciting bundling package and loyalty program, optimize promotion activities, utilize advertising to reach consumers, and strengthen hotel facility.

Effect of Adding Garlic Flour (Allium sativum) on Complete Blood Count Case Study Newcastle Disease in Broilers

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: The purpose of this study is to find out how garlic flour (Allium sativum) affects the synthesis of hemoglobin, erythrocytes, hematocrit, and heterophils/lymphocytes in the blood of broiler animals infected with the Newcastle disease (ND) virus. The Duncan follow-up test was used in this study’s analysis, which used a completely randomized design. According to the results of this study, the consumption of garlic flour (Allium sativum) had no significant influence on hemoglobin, erythrocytes, hematocrit, and heterophils/lymphocytes in the blood in the spleen organ of broiler. However, garlic flour (Allium sativum) only protects broilers’ immune systems when they are infected with the ND virus. In addition to the ND virus, extrinsic factors such as nutrition, environmental humidity, and temperature around the rearing drum all have an impact on blood output.

Outpatient Length of Stay (OLOS) Analysis at Edelweis Hospital using Machine Learning Algorithm

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Patient satisfaction may be impacted by the length of stay (LOS) that a patient perceives during an outpatient clinic visit. With the increasing competition in the healthcare industry and patients’ demands for higher-quality care, hospitals are focusing more on enhancing their quality from a clinical and management perspective. The Indonesia Ministry of Health has established minimum standards (SPM) for healthcare services that all Indonesian hospitals are required to meet, particularly the hospital waiting time indicator, which must be no longer than 60 minutes. Furthermore, there is a term in healthcare called outpatient length of stay (OLOS) that is not yet specified in SPM. OLOS is defined as the amount of time a patient spends in a hospital from the moment he or she arrives at the administration until he or she leaves. Edelweis Hospital is one of a private hospital located in Bandung that has established a 2-hour maximum LOS standard for its outpatient services. Providing accurate information about LOS may increase patient satisfaction by reducing uncertainty. However, effective methods to predict the length of stay for outpatients (OLOS) in Pediatric Clinics are seldom known. This study’s goal is to design a prediction model for OLOS based on patient characteristics and several other clinical attributes. By identifying the attributes that affected OLOS, the model will help hospital make relevant decisions. We used machine learning algorithms such as random forest, decision tree, k-nearest neighbor (kNN), adaboost, and gradient boosting to design prediction models for OLOS. From the validation set, random forest has the highest accuracy rate with a value of 99.3%, followed by decision tree and gradient boosting were 99.2% each. Furthermore, machine learning models were used to determine the importance of attributes. These models could eventually be used alongside with real-time IT system data to provide accurate real-time estimates of OLOS at the Pediatric Clinic.

The Effect of Sonication Duration and Citric Acid Concentration on The Yield of Reduced Graphene Oxide (r-GO) Isolated from East Kalimantan Bituminous Coal

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Reduced graphene oxide (r-GO) is a derivative of graphene which has good electrical conductivity, so it can be used as a composite in the industrial sector. The manufacture of graphene oxide (GO) as the basic material for r-GO is carried out using green chemistry one of them is using the sonication technique and citric acid reductant. This research aims to isolated r-GO from East Kalimantan Bituminous coal which has 70,24% carbon content. The citric acid was varied on 10%, 30%, and 50% and the applies sonication duration was 10, 30, and 50 minutes. In order to obtain the optimal r-GO which was evaluated according to the lowest yield. The optimal condition took place at 10% citric acid under 50 minutes sonication. The r-GO was characterized using FTIR and it showed that the peaks of C-OH, C=C, and C-O-C exhibiting the high %T. The morphology of selected r-GO was closed to the references based on SEM analysis. There was an increase about 50,20% of carbon content in r-GO (84,412%) compared to the GO (56,199%). On the other hand, the percentage of oxygen decreased by 64,27% for GO (23,785%) to selected r-GO (8,498%). There was a change of C:O ratio, from 2,409 (GO) to 9,935 (r-GO). Its density and pH for r-GO were 1,4 g/cm3 and 2.

Implementation of Decision-Making Methods in Determining the Object of Customs and Excise Audit: Study on DGCE Regional Office of West Java for Quarter IV 2023

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This research aims to select the best customs and excise audit objects using several criteria that have been determined in this research by implementing the decision-making method in the determination process so that the process will be optimal. In this study, researchers used the VFT method to determine the criteria for determining customs and excise audit objects. Next, the researcher will select several company objects that are feasible to be audited from several nominations given using the SMART method.  As a result, 10 criteria were found and 5 companies with the highest value ranking were selected as audit objects from 21 nominated companies which were expected to provide optimal quality audit results.

The Effect of Micro and Macro Brand Ambassador Related To Soft and Hard Selling Language on Purchase Decision of Piero Shoes in Jakarta, Indonesia

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The local shoe industry in Indonesia is growing, one of the local shoe brands that is well known is PIERO, which has been established since 1999 Having experienced its peak in the early 2000s, many efforts are being made by Piero to maintain its existence. The development of the digital world, especially the social media sector which eventually became social commerce, made Piero think about whether they should choose brand ambassadors and calculate the budget to collaborate with the right brand ambassador. Moreover, there are two kinds of digital brand ambassadors: micro and macro influencers. This issue ultimately becomes a problem that must be answered immediately, because PIERO’s competitors have begun to move rapidly on social media with their brand ambassadors. The purpose of this research is to identify the effect between micro and macro brand ambassadors related to soft or hard language with brand trust, purchasing decision, brand image on Piero shoes. This research is using quantitative design. To conduct the study, the authors recruited 339 participants from an online social media then randomly assigned to one of four conditions: micro influencer with high selling language, micro influencer with low selling language, macro influencer with high selling language, and macro influencer with low selling language. They were then asked to view an Instagram post by the assigned influencer and fulfill the questionnaire. Based on the result of research analysis using spss through multi anova analysis, the author conclude that : Micro brand ambassador with soft selling language is more effective at brand trust and purchase decision, meanwhile Macro brand ambassador with hard selling language is more effective to represent a good brand image to the customer.