Pengukuran Modulus Elastisitas Dinamis Batuan dengan Metode Seismik Refraksi

The seismic wave velocity in rock formation depends on the elastic modulus and mass density of rock where the wave travels. The velocity measurement of P and S waves on rock formation and the mass density in the laboratory can be used for calculating the elastic modulus of rock formation. The elastic modulus is part of rock mechanical parameter needed in geological engineering researches. The velocity measurement of P and S waves by the seismic refraction method was done on a tunnel with 11 spreads of measurement. From the results of the measurement, three groups of rock formation could be identified. The first is rock formation with Ed=8.890-12.68 MPa and G=3.306-4.830MPa; the second group is rock formation with Ed=8.890-12.68 MPa and G=3.306-4.830MPa; and the third group is with Ed=18.520-21.120MPa and G=6.724-7.744MP. The first group is clay formation while the second and third groups are andesitic stone formation

Integrating Preventive Maintenance Scheduling as Probability Machine Failure and Batch Production Scheduling

This paper discusses integrated model of batch production scheduling and machine maintenance scheduling. Batch production scheduling uses minimize total actual flow time criteria and machine maintenance scheduling uses the probability of machine failure based on Weibull distribution. The model assumed no nonconforming parts in a planning horizon. The model shows an increase in the number of the batch (length of production run) up to a certain limit will minimize the total actual flow time. Meanwhile, an increase in the length of production run will implicate an increase in the number of PM. An example was given to show how the model and algorithm work

PEMBELAJARAN BAHASA ISYARAT DENGAN KINECT DAN METODE DYNAMIC TIME WARPING

This study aims to develop an application program for sign language learning. The application works by detecting hand gestures using the Kinect sensor then comparing the database with the pattern of hand movements using the dynamic time warping (DTW). Kinect Sensor launched by Microsoft in 2010 is purposed for the Xbox 360 game console so that players can use body movement as game controller. The dynamic time warping (DTW) is a method for calculating the similarity between two time series data that can vary in time and speed. In tests performed by each user, there are indications that the learning curve increases along with the number of experiments conducted