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This study discusses the application of fuzzy logic in determining the selling price of used cellphones with a case study on Kayyis Celluler Depok. This study was conducted to find out how to determine the selling price of used smart phones using the Mamdani fuzzy method approach. There are 4 fuzzy variables that will be modeled in this study, consisting of 3 input variables, namely the condition of the cellphone, market price, and cellphone accessories, and 1 output variable, namely the selling price of used cellphones. The inference process in the application of fuzzy operators uses the MIN implication function. Furthermore, the composition of all fuzzy outputs is performed using the max method. Then, confirmation or called defuzzification is done using the Centroid method.

Background: Obesity is a pathological condition due to excessive fat accumulation than is needed for body function. Pregnant women with overweight and obesity are at high risk and have been shown to be associated with increased complications in pregnancy. Cesarean section is a surgery to deliver a fetus by opening the abdominal wall and uterine wall. Generally, in cesarean section, spinal anesthesia is performed. Objective: to determine the hemodynamic picture of obese caesarean section patients with spinal anesthesia. Method: The method used is observational analytic with a cross-sectional approach and consecutive sampling technique. Data analysis uses parametric statistics. The data in this study are the results of differences in obese and non-obese patients. Data collection techniques in this study include documentation and observation. Results: The pre-anesthesia results obtained an average systolic blood pressure = 138.31 ± 17.528, an average diastolic blood pressure = 82.54 ± 10.643 and an average pulse of 100.69 ± 15.315, while the results after 5 minutes obtained an average systolic blood pressure of 105.31 ± 12.572, an average diastolic blood pressure of 61.15 ± 11.753 and an average pulse of 99.54 ± 18.963. Conclusion: Changes in blood pressure and pulse before spinal anesthesia with after spinal anesthesia in obese patients undergoing cesarean section showed a decrease in blood pressure and pulse in the 5th minute after injection.

 Infection prevention therapy generally uses antibiotics (Priyanto, 2009) where inappropriate use of antibiotics (Paterson, et al., 2005) can cause resistance to antibiotics. Increasing bacterial resistance to antibiotics provides a great opportunity to obtain antibacterial compounds by utilizing the diversity of plants in Indonesia (Manik et al, 2018). Dayak onions on Lembata Island are known as forest onions, their alkaloid content has an antimicrobial function. This research aims to further study the potential of Dayak onion bulbs / forest onions (Eleutherine palmifolia) (L) Merr taken from the Lembata area, East Nusa Tenggara, in inhibiting the growth of Gram-negative Escherichia coli bacteria which include the Extended Spectrum Beta Lactamase (ESBL) strain. ) with Escherichia coli bacteria. Dayak onion 96% ethanol extract was made in a concentration of 10% to 100% which was tested with ESBL strain Escherichia coli bacteria, the inhibitory power formed was measured to determine the Minimum Inhibitory Concentration (MIC) value. Data obtained from Dayak onion (Eleutherine palmifolia) L (Merr) ethanol powder extract has antimicrobial activity in inhibiting the growth of Escherichia coli bacteria in Dayak onion (Eleutherine palmifolia) L (Merr) ethanol powder extract at concentrations of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% of Escherichia coli bacteria is a concentration that is included in the weak group.

Chronic renal failure is a progressive and continuous destruction of kidney structures. Chronic renal failure occurs in susceptible individuals, analgesic nephropathy, destruction of renal papillae associated with daily use of analgesic drugs for years. Whatever the cause, there is a progressive deterioration of kidney function which is characterized by a progressive decrease in the Glomelurus Filter Rate (GFR) (Corwin, 2009). Chronic kidney failure is a failure of kidney function to maintain metabolism and fluid and electrolyte balance due to progressive destruction of kidney structures with manifestations of accumulation of residual metabolites (uremic toxicants) in the blood (Muttaqin & Sari, 2011). as well as electrolytes and acid-base composition of body fluids, removing metabolic wastes that are no longer needed by the body, regulating blood pressure and hormonal function. Chronic Kidney Disease (CKD) is the final stage of chronic kidney failure where GFR <15 ml/min/1.73m2 so that the body fails to maintain metabolism and fluid and electrolyte balance, causing uremia, namely retention of urea and other nitrogenous wastes in the blood (Smeltzer et al. al, 2008; National Kidney Foundation in Kallenbach, et al, 2005). With the increasingly real decline in kidney function or worsening of symptoms of uremia, renal replacement therapy is required for survival, namely dialysis and organ transplantation. There are two methods of dialysis, one of which is Hemodialysis (Potter, 2005; Smelzer, 2008).     

The elderly group during the pandemic is the group most at risk of experiencing severity/morbidity and mortality due to Covid-19 disease. This is because elderly patients (geriatric) generally have various comorbidities, such as cardiovascular disease, chronic respiratory disease, diabetes mellitus and hypertension. The elderly as a vulnerable group, of course, really need the right information related to Covid-19 with the right media. Media that can be used to provide information on Covid-19 to the elderly are posters and power points. This provision can be done by nurses. This research will be conducted on 50 elderly people at Kelurahan Bendungan Semarang. The study was conducted by measuring the level of knowledge with a knowledge level questionnaire about the problem of covid-19, before and after treatment. The design of this study was a quasi-experimental pre-test post-test with control group. The research sample was determined by total sampling with certain criteria, namely: 1) elderly aged 60 years and over, 2) can read, write, communicate well, 3) do not experience sensory, cognitive, and movement disorders, 4) participate in all activities with 100% attendance. The division of the group was 25 people for the intervention group and 25 people for the control group. The provision of posters and PPT media was held 4 times in 4 weeks. This is done in combination because the combination of the two media can increase the level of better knowledge, especially for the elderly who have experienced a decline in function. There is an increase in the level of knowledge from low level 4 people (16%), medium level 15 people (60%), high level 6 people (24%) to low level 1 person (4%), medium level 9 people (36%), high level 15 people (60%).

The main function of the kidneys under normal conditions is to regulate fluids and electrolytes and the acid-base composition of body fluids, remove metabolic wastes that are no longer needed by the body, regulate blood pressure and hormonal function. Chronic Kidney Disease (CKD) is the final stage of chronic kidney failure where GFR <15 ml/min/1.73m2 so that the body fails to maintain metabolism and fluid and electrolyte balance, causing uremia, namely retention of urea and other nitrogenous wastes in the blood (Smeltzer et al. al, 2008; National Kidney Foundation in Kallenbach, et al, 2005). With the increasingly real decline in kidney function or worsening of symptoms of uremia, renal replacement therapy is required for survival, namely dialysis and organ transplantation. There are two methods of dialysis, one of which is Hemodialysis (Potter, 2005; Smelzer, 2008). Cases of chronic kidney failure in the world have increased by more than 50%, in the United States which is a very developed country every year there are about 20 million adults suffering from chronic kidney failure and undergoing hemodialysis in more than 100,000 patients, while in Indonesia, according to the Indonesian Kidney Diatrans Foundation, YDGI), in 2007 there were about 100,000 chronic kidney failure patients but only a few patients were able to undergo hemodialysis. Kidney replacement therapy in Indonesia was started in 1972 in Jakarta (Dr. Cipto Mangunkusumo Hospital/FKUI), in Bandung in 1976 (Hasan Sadikin Hospital/FK UNPAD).