Studi Pelepasan Beban Pada PLTU Keramasan Saat Terjadi Penurunan Frekuensi

<p><em>The demand for electric power increases along with the development of technological progress and development. The use of electricity is an important factor in people's lives, both in households, lighting, communication, </em><em>and </em><em>industrial. The purpose of this research is to calculate the frequency response before load shedding, to calculate the frequency response after load shedding and to analyze the load recovery after normal frequency in the load. The methods to be used in writing and discussing this research are: Observation Method, Interview Method / Interview, Literature Study Method. Based on the calculation of the data in the previous chapter, the following conclusions can be drawn, the calculation of the conditions before carrying out the load shedding is based on the rate of decreasing frequency from the result obtained is 1.6 Hz / s, then to calculate the time used in determining the frequency at the time of load shedding then the results obtained are 54 Hz, Meanwhile, to calculate the frequency after load shedding that is obtained is 49.1 Hz, Calculation of load shedding time is expected when there is a decrease in frequency of 10.5 seconds, Calculation of the load rate of increase expected after load shedding then the optimal load value that must be removed is 5.55 w. </em></p>

Pattern and Cause of Road Traffic Accidents in Morang District

Background: Road traffic accidents is growing continuously as a global burden and would be a leading cause of death in developing countries. The global burden of road traffic accidents continues to grow and promises to overtake tropical diseases as leading causes of death in the developing world. This study aimed to study the pattern and causes of road traffic accidents in Morang district.Methods: Record based descriptive cross-sectional study was used by reviewing all registered RTA cases of the District Traffic Police Office, Morang during fiscal year 2074/75 (Shrawan 2074 to Ashad 2075). 501 road traffic accident cases were found in the record and used for the study. The data was analysed using SPSS v 16 and presented in normal frequency tables and crosstables.Results: Out of 501 accidents 32.2% occurred Friday and Saturday. In the evening time, most of the accidents occurred. In highways, 53.5% of accident cases occurred. 82% of the accidents occurred in blacktop road. Two-wheelers are mostly involved in accident cases (77%). Negligence (55.7%) and over-speed (36.5%) were the major reasons for accidents. In 33% of cases, accidents occurred involving pedestrians and cyclists. 80% of the drivers are below 40 years; similarly 80% of the victims are also below 40 years. Among victims who died 84.1% were male and among injured 73.3% were males.Conclusions: Weekends, evening, highways and two wheelers are more accident prone time, place and vehicles respectively. Overspeed and negligence of driver tends to major cause of accidents and majority of victims are the young bike riders and pedestrians. Keywords: Burden; causes; road traffic accidents; pattern

Stability Analysis of Different Regulation Modes of Hydropower Units

The dynamic characteristics of hydropower unit governing systems considerably influence the stability of hydropower units and the connected power system. The dynamic performances of hydropower units with power regulation mode (PRM) and opening regulation mode (ORM) are different. This paper establishes a detailed linear model of a hydropower unit based on the Phillips–Heffron model. The damping characteristic and stability of two regulation modes with different water inertia time constants TW were analyzed. ORM tended to provide negative damping, while PRM often provided positive damping in the major parts of the frequency range within the normal frequency oscillations when TW was large. Eigenvalue analysis illustrated that PRM has better stability than ORM. To validate the analysis, a simulation under two typical faults WAS conducted based on a nonlinear model of a hydropower unit. The simulation results illustrated that the responses of units with PRM are more stable in terms of important operating parameters, such as output power, rotor speed, and power angles. For hydropower units facing challenges in stable operation, PRM is recommended to obtain good dynamic stability.

Profile of Diarrheal Patients Aged Less than Five Years Old Hospitalized in Dr. Soetomo General Hospital Surabaya in 2016-2018

Introduction: Diarrhea is a collection of symptoms in the form of decreased stool consistency accompanied by more than normal frequency of defecation. Diarrhea is the second largest cause of death in children under five years old. In 2010, East Java was ranked first in the frequency of outbreaks in Indonesia. This study described the profile of diarrhea patients in children less than 5 years old in the Children's Ward of Dr. Soetomo General Hospital Surabaya in 2016-2018. Dr. Soetomo General Hospital Surabaya was chosen for data collection because it is one of the main referral hospitals in Indonesia, thus it has diverse cases. This study aimed to describe the profile of diarrhea patients in children less than 5 years old in the Children's Ward of Dr. Soetomo General Hospital Surabaya in 2016-2018.Methods: This study was a retrospective study by assessing the patient's medical record and analyzed descriptively.Results: There were 650 patients (425 male and 225 female), at most 6-11 months (34.6%). Most patients were classified as malnourished (45.4%). The type of diarrhea was dominated by acute watery diarrhea (94.8%). Mild-to-moderate dehydration (84.2%) was found in most patients. The comorbidities were found in 83.4% of patients, with malnutrition (45.4%) and febrile seizures (30.3%) as the most common contributors. The therapy used was intravenous rehydration (99.7%), antibiotics (45.7%), zinc (98.2%), and probiotics (96.3%).Conclusion: Most diarrhea patients in this study were male, aged 6-11 months, mild-to-moderate dehydration, malnourished, suffering from acute water diarrhea, accompanied by comorbidities, and treated with intravenous rehydration.

Major Risk Factors Faced by Women During Pregnancy in Kathmandu Metropolitan City

Giving birth to another person's life is not a minor matter. Pregnancy canals be a risky condition that can lead to death, while some die; some survive a short-lived battle of death happens. This study aimed to identify risk factors for female pregnancy and find out the major pregnancy problems faced by pregnant women. Forty six women who teach in the Faculty of Education in Kathmandu, Nepal were taken as a sample size. A descriptive quantitative method was used where a structured questionnaire was filled with their consent. IBM SPSS 20version was used for statistical analysis which calculated the risk estimates odd ratio and confidence interval at 95%; the only normal frequency was tabulated and analyzed. This study finds that many risk factors in the pregnancy period like; health problems, lack of adequate knowledge, lifestyle exposure, and age factors. Hence women should be accompanied by their partner and family and society and support them during pregnancy time.

A surprising formula for the spread of Covid-19 under aggressive management

We propose an algebraic-type formula that describes with high accuracy the total number of detected infections for the Covid-19 pandemic in many countries. Our 2-phase formula can be used as a powerful forecasting tool. It is based on the author’s new theory of momentum management of epidemics; Bessel functions are employed. Its 3 parameters are the initial transmission rate, reflecting the viral fitness and “normal” frequency of contacts in the infected areas, and the intensity of prevention measures at phases 1, 2. Austria, Brazil, Germany, Japan, India, Israel, Italy, the Netherlands, Sweden, Switzerland, UK, and the USA are considered. For the USA, all states are processed independently and some “interaction” is added; the forecasting software is provided.

PENGARUH TERAPI SPORT MASSAGE PRA-EXERCISE TERHADAP PENINGKATAN AGILITY PADA PEMAIN SEPAKBOLA KLUB UTP SURAKARTA

This current study aims at observing the influence of pre-exercise sport massage therapy towards the cultivation of agility to the football player of Universitas Tunas Pembangunan Surakarta. This study has been accomplished in 18 weeks. The population of the study is all of the football player of UTP Surakarta. The samples are 28 athletes. Based on the prerequisite test result, the normality test of the pretest group experiment is at 0,130, the post-test group experiment is at 0,161, the controlled pre-test is at 0,187, the controlled post-test is at 0,168. Based on the normality test, it can be concluded that all of the data are at 0,05 which means that the data distributes the normal frequency. Based on the homogeneity test, this study shows at 0,53 where the data depicts above 0,05, hence the data are homogeny. Based on the result of hypothesis test towards the pre-test and post-test experiment, it can be concluded that the significance level is at 0,328 > 0,05, therefore the null hypothesis which reflects “there are no influence of pre-exercise massage therapy towards the increase of agility to the football player of Universitas Tunas Pembangunan Surakarta” is declined.

Fatigue of NPP Components Simulated by Non-Uniformly Strained Stainless Steel Specimens

Comprehensive experimental research on fatigue performance of niobium stabilized (type 347) steel has revealed beneficial effects of hot holds aimed to simulate normal operation of NPP between the fatigue relevant transients. Reduction of plastic strain, extension of life and increase of endurance limit has been demonstrated in strain controlled HCF tests. Our latest results indicate moderate, but still measurable ‘hold effects’ even without any stop of straining and loading, when blocks of low rate cycles are applied between normal frequency straining at constant 325°C. A new lab testing approach was developed to simulate the ‘component behavior’ in moderate strain concentrations within the NPP primary circuit. Strain concentrations in range of 1.5 ≤ Kε ≤ 2 are simulated through displacement controlled straining of standard and modified geometry LCF specimens. New results confirm the earlier results and introduce another consequence of holds. Cyclic softening promotes localization of strain, but hold hardening reverses this trend. The holds retard strain localization not only within the material microstructure, but also in geometric strain concentrations. We conclude that the geometric delocalization of strain can amplify beneficial hold effects for components. The local strains may reduce below the endurance limit resulting to run-out tests beyond millions of cycles, even though notable values of fatigue usage (CUF) had been accumulated during earlier phases of the tests. Applicability of the transferability factor introduced in 2013 to the German KTA standard No. 3201.2 is supported. Exact quantification of the factor is not easy, but in all considered cases Fhold ≤ 1. This means that the fatigue usages are overestimated without this factor.