scholarly journals tfaw survey – I. Wavelet-based denoising of K2 light curves. Discovery and validation of two new Earth-sized planets in K2 campaign 1

2020 ◽  
Vol 498 (2) ◽  
pp. 2778-2797
Author(s):  
D del Ser ◽  
O Fors
Keyword(s):  
Detection Efficiency ◽  
Light Curves ◽  
Type Star ◽  
Posterior Distributions ◽  
Denoising Method ◽  
Low Snr ◽  
The One ◽  
Almost All ◽  
First Time ◽  
Better Than

ABSTRACT The wavelet-based detrending and denoising method tfaw is applied for the first time to EVEREST 2.0-corrected light curves to further improve the photometric precision of almost all K2 observing campaigns (C1–C8, C12–C18). The performance of both methods is evaluated in terms of 6 h combined differential photometric precision (CDPP), simulated transit detection efficiency, and planet characterization in different SNR regimes. On average, tfaw median 6 h CDPP is ${\sim} 30{\rm {per \, cent}}$ better than the one achieved by EVEREST 2.0 for all observing campaigns. Using the transit least-squares (tls) algorithm, we show that the transit detection efficiency for simulated Earth–Sun-like systems is ∼8.5× higher for tfaw-corrected light curves than that for EVEREST 2.0 ones. Using the light curves of two confirmed exoplanets, K2-44 b (high SNR) and K2-298 b (low SNR), we show that tfaw yields better Markov chain Monte Carlo posterior distributions, transit parameters compatible with the catalogued ones but with smaller uncertainties, and narrows the credibility intervals. We use the combination of tfaw’s improved photometric precision and tls enhancement of the signal detection efficiency for weak signals to search for new transit candidates in K2 observing campaign 1. We report the discovery of two new K2-C1 Earth-sized planets statistically validated, using the vespa software: EPIC 201170410.02, with a radius of 1.047$^{+0.276}_{-0.257}\mathrm{ R}_{\oplus }$ planet orbiting an M-type star, and EPIC 201757695.02, with a radius of 0.908$^{+0.059}_{-0.064}\mathrm{ R}_{\oplus }$ planet orbiting a K-type star. EPIC 201757695.02 is the 9th smallest planet ever discovered in K2-C1, and the 39th smallest in all K2 campaigns.

scholarly journals Preliminary Analysis and Evaluation of BDS-3 RDSS Timing Performance

2022 ◽  
Vol 14 (2) ◽  
pp. 352
Author(s):  
Rui Guo ◽  
Dongxia Wang ◽  
Nan Xing ◽  
Zhijun Liu ◽  
Tianqiao Zhang ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Satellite System ◽  
Timing Accuracy ◽  
Analysis And Evaluation ◽  
Geo Satellite ◽  
The One ◽  
Satellite Service ◽  
First Time ◽  
Performance Timing ◽  
Better Than

Radio determination satellite service (RDSS) is one of the characteristic services of Beidou navigation satellite system (BDS), and also distinguishes with other GNSS systems. BDS-3 RDSS adopts new signals, which is compatible with BDS-2 RDSS signals in order to guarantee the services of old users. Moreover, the new signals also separate civil signals and military signals which are modulated on different carriers to improve their isolation and RDSS service performance. Timing is an important part of RDSS service, which has been widely used in the field of the power, transportation, marine and others. Therefore, the timing accuracy, availability and continuity is an important guarantee for RDSS service. This paper summarizes the principle of one-way and two-way timing, and provides the evaluation method of RDSS timing accuracy, availability and continuity. Based on BDS-3 RDSS signal measurements of system, the performance of one-way timing and two-way timing is analyzed and evaluated for the first time. The results show that: (1) the accuracy of one-way timing and two-way timing is better than 30 ns and 8 ns respectively, which are better than the official claimed accuracy; (2) the RMS of one-way timing accuracy is 5.45 ns, which is 20% smaller than BDS-2, and the availability and continuity are 100%; (3) the RMS of two-way timing accuracy is 3.59 ns, which is 34% smaller than one-way timing, and both of the availability and continuity are 100%; (4) the orbit maneuver of GEO satellite make the one-way timing has 7.68 h recovery, but has no affection on the two-way timing.

Hesiod's Myth of the five (or three or four) races

1998 ◽  
Vol 43 ◽  
pp. 104-127 ◽  
Author(s):  
Glenn W. Most
Keyword(s):  
World History ◽  
Literary Form ◽  
Greek Literature ◽  
Human History ◽  
Physical Deterioration ◽  
The Many ◽  
The One ◽  
Definition Of ◽  
First Time ◽  
Better Than

Few passages in Greek literature are as familiar, and as perplexing, as the story of the various races of men in Hesiod'sWorks and Days. On the one hand, thismythseems perfectly to fulfill Italo Calvino's definition of a classic: somehow we seem always already to know it even when we come upon it for the very first time. For the conception of a golden age, when life was easier and men were better than now, has become so basic a motif of western culture that it is familiar even to the many who have never read or even heard of theWorks and Days; moreover, Hesiod seems at first glance to deploy such widespread notions as those of a succession of ages of world history and of a steady moral and physical deterioration from the beginning of human history to the present. But on the other hand, the specific literary form which this myth assumes in thetextin which it is embodied here seems strangely at odds with these familiar ideas. For Hesiod's text has a richness and complexity far in excess of what would be needed to communicate them, and in certain crucial respects seems to be at variance or even in contradiction with them. Instead of simply distinguishing between past and present, Hesiod apparently constructs a complicated scheme juxtaposing four metals in descending order of value, from gold through silver and bronze to iron; but he then goes on to confuse this pattern by inserting between the bronze and iron races a race of heroes who not only are not associated with any metal but also interrupt the steady decline by being better than their immediate predecessors. Without Hesiod, we probably would not even have this myth; yet his own version of it seems oddly defective.

scholarly journals “The Gorky Komsomol – to the children!: Archival documents. Memoirs”: Revisiting the Book Publication in Nizhny Novgorod

2020 ◽  
pp. 1267-1272
Author(s):  
Alexey A. Gordin ◽  
◽  
Elena D. Gordina ◽  
Keyword(s):  
Child Neglect ◽  
Social Situations ◽  
Archival Documents ◽  
Systematic Solution ◽  
Post War ◽  
The One ◽  
Almost All ◽  
Historical Past ◽  
First Time ◽  
Further Development

The problem of children upbringing is always significant, especially in difficult, critical social situations. In modern times, it seems necessary to reconsider the Soviet experience in systematic solution of this problem: in the period when the Soviet state was emerging after the Civil War, in the days of its further development, in the most difficult period of the Great Patriotic War, in the post-war decades, and in the difficult years of the Perestroika. Documents collection “The Gorky Komsomol – to the children!” includes all types of documents (protocols, background informations, reports, information, memos, documents of personal provenance, photographs, etc.); it is the first publication that comprehensively covers the Komsomol members work with children in the Nizhny Novgorod (Gorky) region. In working on the book, materials of 47 district committees, city committees, and Komsomol committees have been used, 550 sources have been identified. 215 documents and 90 photographs are included in the collection, almost all of which (with exception of 11) are being published for the first time. Previously, the Nizhny Novgorod archivists published two collections: “You and I, Leningrad” (2014) and “Childhood seared by the war” (2015). Thus, the documentary material on important and practically unstudied by the Nizhny Novgorod researchers “children” topic is being introduced into scientific use. The documents in the collection allow us to reconstruct the forms of Komsomol members’ participation in the upbringing children and adolescents. Much attention is paid to the Komsomol patronage over children’s institutions, the Komsomol members’ fight against child neglect, the activities of pedagogical groups, and the organization of children’s leisure. Of particular interest are new photographs from the personal provenance archives and memoirs of the Komsomol activists. This collection, on the one hand, helps to fill the gap in the picture of historical past of the Gorky region, on the other hand, mainstreams the “children” topic and invites historians to turn to its further study.

scholarly journals Scaling K2. IV. A Uniform Planet Sample for Campaigns 1–8 and 10–18

2021 ◽  
Vol 162 (6) ◽  
pp. 259
Author(s):  
Jon K. Zink ◽  
Kevin K. Hardegree-Ullman ◽  
Jessie L. Christiansen ◽  
Sakhee Bhure ◽  
Britt Duffy Adkins ◽  
...  
Keyword(s):  
Stellar Population ◽  
Detection Efficiency ◽  
Population Analysis ◽  
Eclipsing Binaries ◽  
Light Curves ◽  
Contamination Rate ◽  
Short Period ◽  
First Time ◽  
Transit Signals ◽  
Future Population

Abstract We provide the first full K2 transiting exoplanet sample, using photometry from Campaigns 1–8 and 10–18, derived through an entirely automated procedure. This homogeneous planet candidate catalog is crucial to perform a robust demographic analysis of transiting exoplanets with K2. We identify 747 unique planet candidates and 57 multiplanet systems. Of these candidates, 366 have not been previously identified, including one resonant multiplanet system and one system with two short-period gas giants. By automating the construction of this list, measurements of sample biases (completeness and reliability) can be quantified. We carried out a light-curve-level injection/recovery test of artificial transit signals and found a maximum completeness of 61%, a consequence of the significant detrending required for K2 data analysis. Through this operation we attained measurements of the detection efficiency as a function of signal strength, enabling future population analysis using this sample. We assessed the reliability of our planet sample by testing our vetting software EDI-Vetter against inverted transit-free light curves. We estimate that 91% of our planet candidates are real astrophysical signals, increasing up to 94% when limited to the FGKM dwarf stellar population. We also constrain the contamination rate from background eclipsing binaries to less than 5%. The presented catalog, along with the completeness and reliability measurements, enable robust exoplanet demographic studies to be carried out across the fields observed by the K2 mission for the first time.

Subjective Time Preference and Willingness to Pay for an Energy-Saving Durable Good

2001 ◽  
Vol 32 (3) ◽  
pp. 133-141 ◽  
Author(s):  
Gerrit Antonides ◽  
Sophia R. Wunderink
Keyword(s):  
Willingness To Pay ◽  
Energy Saving ◽  
Subjective Time ◽  
Durable Good ◽  
Discount Function ◽  
Hyperbolic Discount ◽  
The One ◽  
Two Parameter ◽  
Difference Effect ◽  
Better Than

Summary: Different shapes of individual subjective discount functions were compared using real measures of willingness to accept future monetary outcomes in an experiment. The two-parameter hyperbolic discount function described the data better than three alternative one-parameter discount functions. However, the hyperbolic discount functions did not explain the common difference effect better than the classical discount function. Discount functions were also estimated from survey data of Dutch households who reported their willingness to postpone positive and negative amounts. Future positive amounts were discounted more than future negative amounts and smaller amounts were discounted more than larger amounts. Furthermore, younger people discounted more than older people. Finally, discount functions were used in explaining consumers' willingness to pay for an energy-saving durable good. In this case, the two-parameter discount model could not be estimated and the one-parameter models did not differ significantly in explaining the data.

Exploring the Multidimensional Facets of Authoritarianism: Authoritarian Aggression and Social Dominance Orientation

2008 ◽  
Vol 67 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Stefano Passini
Keyword(s):  
Social Dominance ◽  
Factor Model ◽  
Three Dimensional ◽  
Social Dominance Orientation ◽  
Model Fit ◽  
Regression Analyses ◽  
One Dimensional ◽  
Confirmatory Factor ◽  
The One ◽  
Better Than

The relation between authoritarianism and social dominance orientation was analyzed, with authoritarianism measured using a three-dimensional scale. The implicit multidimensional structure (authoritarian submission, conventionalism, authoritarian aggression) of Altemeyer’s (1981, 1988) conceptualization of authoritarianism is inconsistent with its one-dimensional methodological operationalization. The dimensionality of authoritarianism was investigated using confirmatory factor analysis in a sample of 713 university students. As hypothesized, the three-factor model fit the data significantly better than the one-factor model. Regression analyses revealed that only authoritarian aggression was related to social dominance orientation. That is, only intolerance of deviance was related to high social dominance, whereas submissiveness was not.

Designing Women

2018 ◽  
Author(s):  
J. E. Smyth
Keyword(s):  
Working Women ◽  
Costume Design ◽  
Creative Force ◽  
Women's Fashion ◽  
The One ◽  
Studio Era ◽  
Average Woman ◽  
Better Than

During the early 1940s, journalists observed that after years of men controlling women’s fashion, Hollywood had become “a fashion center in which women designers are getting to be a big power.” In a town where “the working girl is queen,” it was women who really knew how to dress working women. Edith Head’s name dominates Hollywood costume design. Though a relatively poor sketch artist who refused to sew in public, Head understood what the average woman wanted to wear and knew better than anyone how to craft her image as the-one-and-only Edith Head. However, she was one of many women who designed Hollywood glamour in the studio era. This chapter juxtaposes Head’s career with that of a younger, fiercely independent designer who would quickly upstage Head as a creative force. In many senses, Dorothy Jeakins’s postwar career ascent indicated the waning of the Hollywood system and the powerful relationship between female designers, stars, and fans.

scholarly journals The Diagnosis and Therapy of Degenerative Knee Joint Disease: Expert Consensus from the Chinese Pain Medicine Panel

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Dong Huang ◽  
Yan-Qing Liu ◽  
Li-Shuang Liang ◽  
Xue-Wu Lin ◽  
Tao Song ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Diagnosis And Treatment ◽  
Joint Disease ◽  
Knee Joints ◽  
Reproduction Rate ◽  
Pain Specialist ◽  
Chinese Association ◽  
The One ◽  
Almost All ◽  
Based Medicine

At present, there are many constantly updated guidelines and consensuses on the diagnosis and treatment of osteoarthritis both at home and abroad. The recommendations established using methods of evidence-based medicine has experienced strict research on controlling bias and promoting reproduction rate. As a result, the previous evidence was reevaluated, and a lot of changes were provoked in the diagnosis and treatment concept of osteoarthritis. However, several methods not recommended by foreign guidelines are still in use in the current clinical practice in China. On the one hand, Chinese experts have not reached extensive consensus on whether it is necessary to make changes according to foreign guidelines. On the other hand, almost all the current relevant guidelines are on osteoarthritis, but the lesions around knee joints which, as a whole, bear the largest weight in human body, cannot be ignored. For this purpose, Chinese Association for the Study of Pain (CASP) organized some leading experts to formulate this Chinese Pain Specialist Consensus on the diagnosis and treatment of degenerative knee osteoarthritis (DKOA) in combination with the guidelines in foreign countries and the expert experience of clinical practice in China. The consensus, which includes the definition, pathophysiology, epidemiology, clinical manifestation, diagnostic criteria, and treatments of DKOA, is intended to be used by first-line doctors, including pain physicians to manage patients with DKOA.

scholarly journals Atlas of ticks (Acari: Argasidae, Ixodidae) in Germany

2021 ◽  
Author(s):  
Franz Rubel ◽  
Katharina Brugger ◽  
Lidia Chitimia-Dobler ◽  
Hans Dautel ◽  
Elisabeth Meyer-Kayser ◽  
...  
Keyword(s):  
Tick Species ◽  
Migratory Birds ◽  
Dermacentor Reticulatus ◽  
Ixodid Ticks ◽  
Federal States ◽  
Ixodes Frontalis ◽  
Argas Reflexus ◽  
The One ◽  
Argasid Tick ◽  
First Time

AbstractAn updated and increased compilation of georeferenced tick locations in Germany is presented here. This data collection extends the dataset published some years ago by another 1448 new tick locations, 900 locations of which were digitized from literature and 548 locations are published here for the first time. This means that a total of 3492 georeferenced tick locations is now available for Germany. The tick fauna of Germany includes two species of Argasidae in the genera Argas and Carios and 19 species of Ixodidae in the genera Dermacentor, Haemaphysalis, and Ixodes, altogether 21 tick species. In addition, three species of Ixodidae in the genera Hyalomma (each spring imported by migratory birds) and Rhipicephalus (occasionally imported by dogs returning from abroad with their owners) are included in the tick atlas. Of these, the georeferenced locations of 23 tick species are depicted in maps. The occurrence of the one remaining tick species, the recently described Ixodes inopinatus, is given at the level of the federal states. The most common and widespread tick species is Ixodes ricinus, with records in all 16 federal states. With the exception of Hamburg, Dermacentor reticulatus was also found in all federal states. The occurrence of the ixodid ticks Ixodes canisuga, Ixodes frontalis, Ixodes hexagonus and I. inopinatus were documented in at least 11 federal states each. The two mentioned argasid tick species were also documented in numerous federal states, the pigeon tick Argas reflexus in 11 and the bat tick Carios vespertilionis in seven federal states. The atlas of ticks in Germany and the underlying digital dataset in the supplement can be used to improve global tick maps or to study the effects of climate change and habitat alteration on the distribution of tick species.

A novel GNSS deformation feature extraction method based on ensemble improved LMD threshold denoising

2020 ◽  
Vol 14 (4) ◽  
pp. 445-453
Author(s):  
Qian Fan ◽  
Yiqun Zhu
Keyword(s):  
Feature Extraction ◽  
Spline Interpolation ◽  
Simulated Data ◽  
Mining Area ◽  
Deformation Monitoring ◽  
Denoising Method ◽  
Feature Extraction Method ◽  
Deformation Feature ◽  
Mode Decomposition ◽  
Better Than

AbstractIn order to solve the problem that the moving span of basic local mean decomposition (LMD) method is difficult to choose reasonably, an improved LMD method (ILMD), which uses three cubic spline interpolation to replace the sliding average, is proposed. On this basis, with the help of noise aided calculation, an ensemble improved LMD method (EILMD) is proposed to effectively solve the modal aliasing problem in original LMD. On the basis of using EILMD to effectively decompose the data of GNSS deformation monitoring series, GNSS deformation feature extraction model based on EILMD threshold denoising is given by means of wavelet soft threshold processing mode and threshold setting method in empirical mode decomposition denoising. Through the analysis of simulated data and the actual GNSS monitoring data in the mining area, the results show that denoising effect of the proposed method is better than EILMD, ILMD and LMD direct coercive denoising methods. It is also better than wavelet analysis denoising method, and has good adaptability. This fully demonstrates the feasibility and effectiveness of the proposed method in GNSS feature extraction.

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