ANALISIS KELAYAKAN USAHA FRESCURA DITINJAU DARI EMPAT PILAR KELAYAKAN USAHA

Frescura merupakan usaha berbasis kesehatan dan kecantikan dengan shower filter. Frescura shower filter dilengkapi dengan komponen filtrasi air, bola ionic negative, ceramics ball, dan water beads essence dengan yang dapat meningkatkan kualitas air, mencegah penuaan, mengobati kulit iritasi serta memiliki daya anti bakteri. Penulisan artikel ini bertujuan untuk menganalisis kelayakan usaha menggunakan teknik pengumpulan data sekunder ditinjau dari aspek pasar dan pemasaran, teknis dan produksi, manajemen usaha, keuangan, serta intangible asset. Analisis pasar dan pemasaran menunjukan bahwa Frescura memiliki prospek pasar yang menjanjikan. Analisis teknis dan produksi menunjukkan bahwa bahan dan alat yang digunakan sudah terjamin kebersihannya. Analisis manajemen usaha menunjukan bahwa setiap pekerja sudah menjalankan jobdesk sesuai keahliannya. Analisis keuangan menunjukkan Payback Period usaha sebesar 4 bulan, NPV sebesar 256.436.202, IRR sebesar 310,75%, serta benefits cost ratio sebesar 2. Analisis berdasarkan intangible assets menunjukkan bahwa Frescura shower filter relevan dengan keadaan yang sedang terjadi dan layak untuk dilanjutkan.

Monuments and the monumentalisation of myths

Paper presented at the Wits History Workshop: Myths, Monuments, Museums; New Premises? 16-18 July, 199

The development of rural vernacular architecture in Southern Africa

A dissertation submitted to the Faculty of Architecture, University of the Witwatersrand, Johannesburg for the Degree of Master of Architecture, October 1980The Southern African rural house form has over the years been subjected to a number of pressures of a cultural and technological nature. These have resulted in its evolution through a number of stages usually also involving the introduction of new materials and the development of new building technology. The links in evolution which exist between the one form and the next are discussed. The special role played by the 'fo u n d ' and natural m aterial in 'w attle and daub' and tra d itio n a l natch c o n s tru c tio n is stressed as, w he n n the case of som e m o d e rn squa; ?r settlem ents, th o s e b u ild in g m aterials cease to be available and substitutes, have to be found. Evolution and change in vernacular architecture have also involved the elem ents of w all d e c o ra tio n , social and c u ltu ra l values and the role of the house fo rm w ith in the e n v iro n m e n t. The va riou s types of rural se ttlem en t patterns in v o lv in g the h o u s e h o ld u n it and the c o m m u n ity as a w h o le are analyzed in b oth th e ir tr a d itio n a l and m o d e rn co n te x ts The final c o n c lu s io n a rrived at is that a lth o u g h rural v e rn a c u la r a rc h ite c tu re as a w h o le is a th re aten ed e le m e n t o f o u r e n v iro n m e n t, its continued existence may ultimately be guaranteed by the economic necessity of implementing low - technology self-help housing projects

Determination of rotation periods in solar-like stars with irregular sampling: the Gaia case

We present a study on the determination of rotation periods (P) of solar-like stars from the photometric irregular time-sampling of the ESA Gaia mission, currently scheduled for launch in 2013, taking into account its dependence on ecliptic coordinates. We examine the case of solar-twins as well as thousands of synthetic time-series of solar-like stars rotating faster than the Sun. In the case of solar twins we assume that the Gaia unfiltered photometric passband G will mimic the variability of the total solar irradiance (TSI) as measured by the VIRGO experiment. For stars rotating faster than the Sun, light-curves are simulated using synthetic spectra for the quiet atmosphere, the spots, and the faculae combined by applying semi-empirical relationships relating the level of photospheric magnetic activity to the stellar rotation and the Gaia instrumental response. The capabilities of the Deeming, Lomb-Scargle, and Phase Dispersion Minimisation methods in recovering the correct rotation periods are tested and compared. The false alarm probability (FAP) is computed using Monte Carlo simulations and compared with analytical formulae. The Gaia scanning law makes the rate of correct detection of rotation periods strongly dependent on the ecliptic latitude (beta). We find that for P ~ 1 d, the rate of correct detection increases with ecliptic latitude from 20-30 per cent at beta ~ 0{\deg} to a peak of 70 per cent at beta=45{\deg}, then it abruptly falls below 10 per cent at beta > 45{\deg}. For P > 5 d, the rate of correct detection is quite low and for solar twins is only 5 per cent on average.Comment: 12 pages, 18 figures, accepted by MNRA

Accommodation or protest? The rise of a wall decorating tradition in rural Southern Africa

Paper presented at the Wits History Workshop: Structure and Experience in the Making of Apartheid, 6-10 February, 1990

Application of Monte Carlo-based statistical significance determinations to the Beta Cephei stars V400 Car, V401 Car, V403 Car and V405 Car

We have used Lomb-Scargle periodogram analysis and Monte Carlo significance tests to detect periodicities above the 3-sigma level in the Beta Cephei stars V400 Car, V401 Car, V403 Car and V405 Car. These methods produce six previously unreported periodicities in the expected frequency range of excited pulsations: one in V400 Car, three in V401 Car, one in V403 Car and one in V405 Car. One of these six frequencies is significant above the 4-sigma level. We provide statistical significances for all of the periodicities found in these four stars.Comment: 11 pages, 17 figure

Multiperiodicity, modulations and flip-flops in variable star light curves I. Carrier fit method

The light curves of variable stars are commonly described using simple trigonometric models, that make use of the assumption that the model parameters are constant in time. This assumption, however, is often violated, and consequently, time series models with components that vary slowly in time are of great interest. In this paper we introduce a class of data analysis and visualization methods which can be applied in many different contexts of variable star research, for example spotted stars, variables showing the Blazhko effect, and the spin-down of rapid rotators. The methods proposed are of explorative type, and can be of significant aid when performing a more thorough data analysis and interpretation with a more conventional method.Our methods are based on a straightforward decomposition of the input time series into a fast "clocking" periodicity and smooth modulating curves. The fast frequency, referred to as the carrier frequency, can be obtained from earlier observations (for instance in the case of photometric data the period can be obtained from independently measured radial velocities), postulated using some simple physical principles (Keplerian rotation laws in accretion disks), or estimated from the data as a certain mean frequency. The smooth modulating curves are described by trigonometric polynomials or splines. The data approximation procedures are based on standard computational packages implementing simple or constrained least-squares fit-type algorithms.Comment: 14 pages, 23 figures, submitted to Astronomy and Astrophysic

SMEI observations of previously unseen pulsation frequencies in γ Doradus

Aims. As g-mode pulsators, gamma-Doradus-class stars may naïvely be expected to show a large number of modes. Taking advantage of the long photometric time-series generated by the solar mass ejection imager (SMEI) instrument, we have studied the star gamma Doradus to determine whether any other modes than the three already known are present at observable amplitude. Methods. High-precision photometric data from SMEI taken between April 2003 and March 2006 were subjected to periodogram analysis with the PERIOD04 package. Results. We confidently determine three additional frequencies at 1.39, 1.87, and 2.743 d−1. These are above and beyond the known frequencies of 1.320, 1.364, and 1.47 d−1. Conclusions. Two of the new frequencies, at 1.39 and 1.87 d−1, are speculated to be additional modes of oscillation, with the third frequency at 2.743−1 a possible combination frequency

Kepler observations of variability in B-type stars

The analysis of the light curves of 48 B-type stars observed by Kepler is presented. Among these are 15 pulsating stars, all of which show low frequencies characteristic of SPB stars. Seven of these stars also show a few weak, isolated high frequencies and they could be considered as SPB/beta Cep hybrids. In all cases the frequency spectra are quite different from what is seen from ground-based observations. We suggest that this is because most of the low frequencies are modes of high degree which are predicted to be unstable in models of mid-B stars. We find that there are non-pulsating stars within the beta Cep and SPB instability strips. Apart from the pulsating stars, we can identify stars with frequency groupings similar to what is seen in Be stars but which are not Be stars. The origin of the groupings is not clear, but may be related to rotation. We find periodic variations in other stars which we attribute to proximity effects in binary systems or possibly rotational modulation. We find no evidence for pulsating stars between the cool edge of the SPB and the hot edge of the delta Sct instability strips. None of the stars show the broad features which can be attributed to stochastically-excited modes as recently proposed. Among our sample of B stars are two chemically peculiar stars, one of which is a HgMn star showing rotational modulation in the light curve.Comment: 19 pages, 11 figures, 4 table