836 research outputs found
Open questions on prominences from coordinated observations by IRIS, Hinode, SDO/AIA, THEMIS, and the Meudon/MSDP
Context. A large prominence was observed on September 24, 2013, for three
hours (12:12 UT -15:12 UT) with the newly launched (June 2013) Interface Region
Imaging Spectrograph (IRIS), THEMIS (Tenerife), the Hinode Solar Optical
Telescope (SOT), the Solar Dynamic Observatory Atmospheric Imaging Assembly
(SDO/AIA), and the Multichannel Subtractive Double Pass spectrograph (MSDP) in
the Meudon Solar Tower. Aims. The aim of this work is to study the dynamics of
the prominence fine structures in multiple wavelengths to understand their
formation. Methods. The spectrographs IRIS and MSDP provided line profiles with
a high cadence in Mg II and in Halpha lines. Results. The magnetic field is
found to be globally horizontal with a relatively weak field strength (8-15
Gauss). The Ca II movie reveals turbulent-like motion that is not organized in
specific parts of the prominence. On the other hand, the Mg II line profiles
show multiple peaks well separated in wavelength. Each peak corresponds to a
Gaussian profile, and not to a reversed profile as was expected by the present
non-LTE radiative transfer modeling. Conclusions. Turbulent fields on top of
the macroscopic horizontal component of the magnetic field supporting the
prominence give rise to the complex dynamics of the plasma. The plasma with the
high velocities (70 km/s to 100 km/s if we take into account the transverse
velocities) may correspond to condensation of plasma along more or less
horizontal threads of the arch-shape structure visible in 304 A. The steady
flows (5 km/s) would correspond to a more quiescent plasma (cool and
prominence-corona transition region) of the prominence packed into dips in
horizontal magnetic field lines. The very weak secondary peaks in the Mg II
profiles may reflect the turbulent nature of parts of the prominence.Comment: 15 pages, 14 figure
Velocity vectors of a quiescent prominence observed by Hinode/SOT and the MSDP (Meudon)
The dynamics of prominence fine structures is a challenge to understand the
formation of cool plasma prominence embedded in the hot corona. Recent
observations from the high resolution Hinode/SOT telescope allow us to compute
velocities perpendicularly to the line-of-sight or transverse velocities.
Combining simultaneous observations obtained in H-alpha with Hinode/SOT and the
MSDP spectrograph operating in the Meudon solar tower we derive the velocity
vectors of a quiescent prominence. The velocities perpendicular to the
line-of-sight are measured by time slice technique, the Dopplershifts by the
bisector method. The Dopplershifts of bright threads derived from the MSDP
reach 15 km/s at the edges of the prominence and are between +/- 5 km/s in the
center of the prominence. Even though they are minimum values due to seeing
effect, they are of the same order as the transverse velocities. These
measurements are very important because they suggest that the
verticalstructures shown in SOT may not be real vertical magnetic structures in
the sky plane. The vertical structures could be a pile up of dips in more or
less horizontal magnetic field lines in a 3D perspective, as it was proposed by
many MHD modelers. In our analysis we also calibrate the Hinode H-alpha data
using MSDP observations obtained simultaneously.Comment: 7 pages, 7 figures, submitted to A &
Pathways to early retirement: structure and agency in decision-making among British civil servants
Determination of 3D Trajectories of Knots in Solar Prominences Using MSDP Data
In this paper we present a new method of restoration of the true
thee-dimensional trajectories of the prominence knots based on ground-based
observations taken with a single telescope, which is equipped with a
Multi-Channel Subtractive Double Pass imaging spectrograph. Our method allows
to evaluate true three-dimensional trajectories of the prominence knots without
any assumptions concerning the shape of the trajectories or dynamics of the
motion. The reconstructed trajectories of several knots observed in three
prominences are presented.Comment: 14 pages, 9 figures, accepted for publication in Solar Physic
Standardisasi Keselamatan dan Kesehatan Kerja (K3) di Ruang Kerja Praktik Tata Busana pada Kelas XI SMK Negeri 1 Brondong Lamongan
This study aims to describe the standardization of OSH in the fashion practice workspace of SMK Negeri 1 Brondong Lamongan, using a qualitative descriptive method, data collection techniques in the form of observation, questionnaires, interviews and documentation. The research instruments used were observation sheets and student response questionnaires totaling 24 students of class XI. The basis for OSH standardization uses the Undang-Undang Dasar Peraturan Pemerintah Republik Indonesia No.1 Tahun 1970 tentang keselamatan kerja. The results of this study indicate that: (1) Observations on the application of OSH in the practical workspace have not met the standards. (2) The participants' responses to the OSH questionnaire obtained results that 1% of students answered disagree, 23% neutral, 58% agreed, and 18% of students answered strongly agreed, with an overall result of 79 which stated that most students had implemented OSH. (3) the factors that influence the implementation of the completeness of Occapational Safety and Health (OSH) standardization are the budget or finance (economy)
The solar chromosphere at high resolution with IBIS. I. New insights from the Ca II 854.2 nm line
(Abridged)
Aims: In this paper, we seek to establish the suitability of imaging
spectroscopy performed in the Ca II 854.2 nm line as a means to investigate the
solar chromosphere at high resolution.
Methods: We utilize monochromatic images obtained with the Interferometric
BIdimensional Spectrometer (IBIS) at multiple wavelengths within the Ca II
854.2 nm line and over several quiet areas. We analyze both the morphological
properties derived from narrow-band monochromatic images and the average
spectral properties of distinct solar features such as network points,
internetwork areas and fibrils.
Results: The spectral properties derived over quiet-Sun targets are in full
agreement with earlier results obtained with fixed-slit spectrographic
observations, highlighting the reliability of the spectral information obtained
with IBIS. Furthermore, the very narrowband IBIS imaging reveals with much
clarity the dual nature of the Ca II 854.2 nm line: its outer wings gradually
sample the solar photosphere, while the core is a purely chromospheric
indicator. The latter displays a wealth of fine structures including bright
points, akin to the Ca II H2V and K2V grains, as well as fibrils originating
from even the smallest magnetic elements. The fibrils occupy a large fraction
of the observed field of view even in the quiet regions, and clearly outline
atmospheric volumes with different dynamical properties, strongly dependent on
the local magnetic topology. This highlights the fact that 1-D models
stratified along the vertical direction can provide only a very limited
representation of the actual chromospheric physics.Comment: 13 pages, 8 figures. Accepted in A&A. Revised version after referee's
comments. New Fig. 1 and 7. Higher quality figures in
http://www.arcetri.astro.it/~gcauzzi/papers/ibis.caii.pd
ANALISIS KONDISI SANITASI DAN HIGIENE DI KANTIN SMA NEGERI 2 PARE KEDIRI
Sanitasi dan higiene di kantin sekolah sangat penting karena kantin sebagai tempat mengolah makanan dan minuman yang selanjutnya dihidangkan kepada konsumen. Kantin dapat menjadi tempat penyebaran penyakit melalui makanan dan minuman. Tujuan dari penelitian ini adalah untuk mengetahui: 1) kondisi sanitasi di kantin SMA Negeri 2 Pare Kediri dan 2) kondisi higiene di kantin SMA Negeri 2 Pare Kediri. Jenis Penelitian ini adalah deskriptif. Penggambilan data dilakukan dengan observasi, wawancara, dan dokumentasi kemudian disajikan melalui tabel dan presentase. Responden adalah penjamah makanan di kantin SMA Negeri 2 Pare Kediri yang berjumlah 6 orang. Hasil penelitian menunjukkan: 1) kondisi sanitasi di lingkungan kantin SMA Negeri 2 Pare Kediri tergolong sangat baik dengan ketercapaian 83,81%. Angka ini dicapai diantaranya melalui tempat sampah yang tertutup, washtafel yang terdapat sabun pencuci tangan ,dan air yang mengalir; 2) Pencapaian personal higiene yang paling besar adalah menggunakan pakaian bersih, menggunakan celemek bersih, menggunakan penutup rambut, kuku pendek dan bersih, menutup mulut / hidung saat batuk, bersin, tidak merokok saat berada di area kantin, rambut pendek, rapi, dan bersih, dan tidak terdapat luka pada anggota badan, dengan persentase 100%. Perlu peningkatan untuk kebiasaan mencicipi makanan dengan sendok atau alat makan karena dapat menjadi sumber kontaminasi. dan sebanyak 50 % penjamah makanan menggunakan perhiasan seperti cincin dan jam tanga
TREATMENT OF PARKINSON'S DISEASE USING THE CAYCE WET CELL BATTERY
Parkinson's disease, a condition involving progressive deterioration of the nervous system, is at present incurable by conventional medicine. Here we report on a study in which we have evidence of clinical improvement from using a treatment modality recommended by Edgar Cayce, a subtle energy device known as the wet cell battery. Cayce said that the wet cell would transfer vibratory energy into the body, and specifically recommended it for neurological disorders, but there have been no previous clinical studies of this modality. T en participants with Parkinson's disease used the wet cell, a chemical battery, with gold and silver solutions, for a four-month treatment period at home. Nine of the ten people followed the protocol consistently (but none completely or perfectly). They averaged slight to moderate improvement in Parkinson's disease symptoms over four months, based on observations by researchers and subjective questionnaires. Over the long term (three years), one participant obtained almost complete remission of his Parkinson's disease symptoms. Since there was no control group the placebo effect cannot be ruled out. However, many minor symptoms showed interesting improvement in several individuals. For example, two people reported regaining their sense of smell, and one had improved color vision. Several people had more facial emotional expressiveness, and reported reduced tremors
IMPROVEMENT OF CIRCUlATION USING THE RADIAL APPLIANCE
The purpose of this study was to determine if a subtle energy device, the Cayce Radial Appliance, could improve circulation in the extremities. There were two aspects to the study: a doubleblind, placebo-controlled experiment and a small clinical investigation. In the experiment, 30 subjects were selected for cold extremities, with the criterion that either the hands or the feet had to be below 800 F during the initial measurement session. To measure improvement of circulation, we used digital thermometers to record the temperatures of the thumbs and big toes on both hands and feet. Subjects were instructed to use the appliance 16 times; laboratory measurements were taken during the 1st, 4th and 16th sessions. Skin temperature turned our to be a difficult variable to work with, due to the wide variability in temperature apparently unrelated to the experimental siruation. The strongest results were observed in the 4th session. During session baseline, differences between hand and foot temperatures of the experimental group were significantly greater than those of the control group (t [13,11] 2.49, p '" .02). The 16th session did not yield significant differences between the experimental and control groups. However, in the experimental group, there was a correlation of r (9) -.56 (p '" .07) of hand temperarure increase with the number of days it took to complete the 16 sessions. That is, those subjects who were more consistent in using the appliance may have obtained better results, though statistically the result is only suggestive due to the small sample size. In contrast, in a clinical follow-up study with five subjects and no control group, we found that all subjects had a substantial increase in hand temperature following three sessions on the appliance (Mean increase'" 8.40 F, SO = 3.3). This increase was well in excess of that seen in either the experimental or control groups in the previous study. One important difference was that in the clinical study, use of the appliance was closely supervised, whereas in the blind study most of the appliance sessions were conducted by the subjects alone in their homes
Estimation of solar prominence magnetic fields based on the reconstructed 3D trajectories of prominence knots
We present an estimation of the lower limits of local magnetic fields in
quiescent, activated, and active (surges) promineces, based on reconstructed
3-dimensional (3D) trajectories of individual prominence knots. The 3D
trajectories, velocities, tangential and centripetal accelerations of the knots
were reconstructed using observational data collected with a single
ground-based telescope equipped with a Multi-channel Subtractive Double Pass
imaging spectrograph. Lower limits of magnetic fields channeling observed
plasma flows were estimated under assumption of the equipartition principle.
Assuming approximate electron densities of the plasma n_e = 5*10^{11} cm^{-3}
in surges and n_e = 5*10^{10} cm^{-3} in quiescent/activated prominences, we
found that the magnetic fields channeling two observed surges range from 16 to
40 Gauss, while in quiescent and activated prominences they were less than 10
Gauss. Our results are consistent with previous detections of weak local
magnetic fields in the solar prominences.Comment: 14 pages, 12 figures, 1 tabl
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