ANALISIS CLUSTERING DENGAN K-MEANS UNTUK PENGELOMPOKKAN PENJUALAN PRODUK PADA HOTEL NEWTON

Customer satisfaction is the main goal of many companies wants to achieve. One of the business fields that focus on customer satisfaction is hotel business. Apart from serving accommodation for customers, hotels also provide variety of products for sale. Inventory management is very important is hotel business because one of many ways to maintain customer satisfaction is by keeping stock so no items are empty when needed. In addition, a good inventory management will not let the company to experiences losses due to outdated inventory. Using data mining K-means clustering algorithm, we can group goods based on the salable goods and the less salable goods. This research aims to assist hotel Newton to improve their inventory management. Data that was used is sales that have been made which divided into 3 trimesters. Data also will be evaluated using RapidMiner application. The results obtained from the research are 3 clusters where the clusters consist of very salable goods, medium salable goods and not salable goods

First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass

In this paper we quantify the temporal variability and image morphology of the horizon-scale emission from Sgr A*, as observed by the EHT in 2017 April at a wavelength of 1.3 mm. We find that the Sgr A* data exhibit variability that exceeds what can be explained by the uncertainties in the data or by the effects of interstellar scattering. The magnitude of this variability can be a substantial fraction of the correlated flux density, reaching $\sim$100\% on some baselines. Through an exploration of simple geometric source models, we demonstrate that ring-like morphologies provide better fits to the Sgr A* data than do other morphologies with comparable complexity. We develop two strategies for fitting static geometric ring models to the time-variable Sgr A* data; one strategy fits models to short segments of data over which the source is static and averages these independent fits, while the other fits models to the full dataset using a parametric model for the structural variability power spectrum around the average source structure. Both geometric modeling and image-domain feature extraction techniques determine the ring diameter to be $51.8 \pm 2.3$ $\mu$as (68\% credible intervals), with the ring thickness constrained to have an FWHM between $\sim$30\% and 50\% of the ring diameter. To bring the diameter measurements to a common physical scale, we calibrate them using synthetic data generated from GRMHD simulations. This calibration constrains the angular size of the gravitational radius to be $4.8_{-0.7}^{+1.4}$ \mathrm{\mu as}, which we combine with an independent distance measurement from maser parallaxes to determine the mass of Sgr A* to be $4.0_{-0.6}^{+1.1} \times 10^6$ M$_{\odot}$.Comment: 65 pages, 35 figures, published in The Astrophysical Journal Letters on May 12, 2022. See the published paper for the full authors lis

First M87 Event Horizon Telescope Results. IX. Detection of Near-horizon Circular Polarization

Event Horizon Telescope (EHT) observations have revealed a bright ring of emission around the supermassive black hole at the center of the M87 galaxy. EHT images in linear polarization have further identified a coherent spiral pattern around the black hole, produced from ordered magnetic fields threading the emitting plasma. Here, we present the first analysis of circular polarization using EHT data, acquired in 2017, which can potentially provide additional insights into the magnetic fields and plasma composition near the black hole. Interferometric closure quantities provide convincing evidence for the presence of circularly polarized emission on event-horizon scales. We produce images of the circular polarization using both traditional and newly developed methods. All methods find a moderate level of resolved circular polarization across the image ($\langle|v|\rangle < 3.7\%$), consistent with the low image-integrated circular polarization fraction measured by the ALMA array ($|v_{\rm int}| < 1\%$). Despite this broad agreement, the methods show substantial variation in the morphology of the circularly polarized emission, indicating that our conclusions are strongly dependent upon the imaging assumptions because of the limited baseline coverage, uncertain telescope gain calibration, and weakly polarized signal. We include this upper limit in an updated comparison to general relativistic magnetohydrodynamic (GRMHD) simulation models. This analysis reinforces the previously reported preference for magnetically arrested accretion flow models. We find that most simulations naturally produce a low level of circular polarization consistent with our upper limit, and that Faraday conversion is likely the dominant production mechanism for circular polarization at 230 GHz in M87*.Comment: 47 pages, 31 figures, published in The Astrophysical Journal Letters on Nov. 8, 2023. See the published paper for the full authors lis

Comparison of the CERN-MEMPHYS and T2HK neutrino oscillation experiments

In this talk I compare the physics potential of possible future neutrino oscillation experiments from CERN to a Mt scale water Cerenkov detector at Frejus (MEMPHYS) and of the T2HK proposal in Japan, where for the CERN experiments an SPL Superbeam and a $\gamma=100$ Beta Beam are considered.Comment: Talk given at NOW 2006, 9-16 Sep 2006, Conca Specchiulla, Otranto, Italy, 3 pages, 2 figure

RUMAH LANSIA KHUSUS PASTOR PRAJA KEUSKUPAN AGUNG SEMARANG DI GEDANGANAK, UNGARAN KABUPATEN SEMARANG, JAWA TENGAH

Keuskupan Agung Semarang terbagi dalam 4 kevikepan dan memiliki 98 paroki, oleh karena itu Keuskupan Agung Semarang memiliki banyak pastor yang tersebar di berbagai kota. Pertumbuhan jumlah pastor meningkat setiap tahunnya. Jumlah pastor praja di Keuskupan Agung Semarang telah mencapai 222 pastor pada tahun 2019. Dengan bertambahnya jumlah pastor, bertambah juga jumlah pastor lansia. Pastor lansia masih dapat melakukan pelayanan walaupun terbatas oleh kondisi fisiknya. Kegiatan pastor lansia sehari-hari diisi dengan berdoa, membaca buku, bahkan menulis buku. Jumlah rumah lansia yang sudah ada mayoritas ditujukan bagi suster sehingga sebagian besar pastor lansia di Keuskupan Agung Semarang sementara ini tinggal di Wisma Domus Pacis (8 orang) dan sisanya tinggal di gereja-gereja maupun rumah lansia untuk umum. Belum ada rumah lansia yang secara khusus ditujukan untuk pastor praja Keuskupan Agung Semarang. Oleh karena itu, dibutuhkan rumah lansia untuk memfasilitasi kebutuhan akan hunian bagi pastor praja Keuskupan Agung Semarang sehingga dapat meningkatkan kualitas hidup pada masa tuanya baik secara fisik maupun psikis. Dengan penataan ruang dalam dan ruang luar pada sudut pandang arsitektural, diharapkan dapat menjadi tempat tinggal yang layak bagi pastor lansia sehingga tidak perlu tinggal di gereja. Kenyamanan dan keamanan pastor lansia menjadi hal yang harus diperhatikan dalam perancangan rumah lansia. Dalam meningkatkan kualitas hidup secara fisik maupun mental, pendekatan arsitektural yang diterapkan adalah pendekatan healing environmen