Laser Ranging Interferometer on GRACE Follow-On: Current Status

2021 ◽  
Author(s):  
Vitali Müller ◽  
Malte Misfeldt ◽  
Laura Müller ◽  
Henry Wegener ◽  
Gerhard Heinzel
Keyword(s):  
Current Status ◽  
Laser Ranging ◽  
The Novel ◽  
Optical Interferometer ◽  
Additional Measurement ◽  
Short Term ◽  
Acceleration Data ◽  
Grace Satellites ◽  
The One

<p>The GRACE Follow-On satellites were launched <span>on</span> <span>22</span>nd May <span>2018</span> <span>to</span> <span>continue</span> the measurement of Earth’s gravity field from the GRACE satellites (<span>2002</span>-<span>2017</span>). A few weeks <span>later</span>, <span>an</span> inter-satellite laser link was established with the novel Laser Ranging Interferometer (LRI), which offers <span>an</span> additional measurement of the inter-satellite <span>range</span> <span>next</span> <span>to</span> the one provided by the conventional microwave ranging instrument. The LRI <span>is</span> the <span>first</span> optical interferometer in space between orbiters, which <span>has</span> demonstrated <span>to</span> measure distance variations with <span>a</span> noise below <span>1</span> <span>nm</span>/√Hz at Fourier frequencies around <span>1</span> Hz, well below the requirement of <span>80</span> <span>nm</span>/√Hz. In this talk, we provide <span>an</span> overview <span>on</span> the LRI, present the current status of the instrument <span>and</span> show results regarding the characterization of the instrument. We will address impulse events that are apparent in the accelerometer <span>and</span> LRI <span>range</span> acceleration data, most of which are expected <span>to</span> <span>be</span> micro-meteorites. Other short-term disturbances in the ranging data will <span>be</span> addressed <span>as</span> well. We conclude with some learned lessons <span>and</span> potential modifications of the interferometry <span>for</span> future geodetic missions.</p>

Laser Ranging Interferometer on GRACE Follow-On: Current Status

2020 ◽  
Author(s):  
Vitali Müller ◽  
Keyword(s):  
Center Of Mass ◽  
Current Status ◽  
Laser Ranging ◽  
The Novel ◽  
Low Frequencies ◽  
Phase Measurements ◽  
Grace Satellites ◽  
Gravity Signal ◽  
The One

<p>The GRACE Follow-On satellites were launched on 22<sup>nd</sup> May 2018 to continue the measurement of Earth’s gravity field from the GRACE satellites (2002-2017). A few weeks later, an inter-satellite laser link was established with the novel Laser Ranging Interferometer (LRI), which offers an additional measurement of the inter-satellite range next to the one provided by the conventional microwave ranging instrument. The LRI is the first optical interferometer in space between orbiters, which has demonstrated to measure distance variations with a noise below 1 nm/rtHz at Fourier frequencies around 1 Hz, well below the requirement of 80 nm/rtHz.</p><p>In this talk, we provide an overview on the LRI and present the current status and results regarding the characterization of the instrument. We will address the scale factor, which is needed to convert the phase measurements to a displacement, and the removal of phase jumps that are correlated to attitude thruster activations. Moreover, the results comprise the coupling of attitude variations into the measured range, which is determined by means of the center-of-mass calibration maneuvers. This coupling is expected to be one of the major error sources at low frequencies, however, it is not directly apparent due to the large gravity signal.</p><p>We conclude with some learned lessons and potential modifications of the interferometry for future geodetic missions.</p>

scholarly journals A Historical Overview Upon the Use of Amphetamine Derivatives in the Treatment of Obesity

2020 ◽  
Author(s):  
Ștefana Stăcescu ◽  
Gabriel Hancu ◽  
Denisa Podar ◽  
Ștefania Todea ◽  
Amelia Tero-Vescan
Keyword(s):  
High Efficiency ◽  
Lifestyle Modification ◽  
Term Treatment ◽  
Current Status ◽  
Historical Overview ◽  
Short Term ◽  
Short Term Treatment ◽  
Treatment Of Obesity ◽  
Amphetamine Derivatives ◽  
The One

Relatively few medications are available for the management of obesity and all are indicated as adjuncts to increased physical activity, caloric restriction and lifestyle modification. Among different weight-loss drugs, the most intriguing and controversial class is the one of anorexic amphetamines, due to their high efficiency but also relevant side-effects. Several previously approved anorexic amphetamines like fenfluramine, phenylpropanolamine, phenmetrazine and sibutramine have been withdrawn from the market due to unanticipated adverse effects. Nowadays only four amphetamine derivatives are approved for short-term treatment of obesity: amfepramone, benzphetamine, phendimetrazine and phentermine. The article provides an overview of both the history, and the current status, of the use of amphetamine derivatives in the obesity pharmacotherapy. J Pharm Care 2019; 7(3): 75-82.

scholarly journals THE CHARACTERIZATION OF MARGIO IN NOVEL ENTITLED LELAKI HARIMAU BY EKA KURNIAWAN

JURNAL BASIS ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 159
Author(s):  
Ellif Shiffiyn Khairaa
Keyword(s):  
Qualitative Method ◽  
Narrative Structure ◽  
The Novel ◽  
Human Relations ◽  
Moral Value ◽  
Good Communication ◽  
The Family ◽  
The One ◽  
Gerard Genette

This researched aims to analyze the characterization of Margio as the main character of the novel entitled Lelaki Harimau by Eka Kurniawan. This study used narrative structure by Gerard Genette which focused on frequency concept to analyze the characterization. The descriptive qualitative method used to reveal and make a deep analysis of the characterization of Margio. The data is taken by reread the novel and written the quotations of the dialogue which focused on the characterization of Margio. The result of this study is Margio has strong characterization and he is the one who connected to the other characters in the novel. He is known as a lovable, obedient to their parents, and a strong man. The moral value of this novel is the key to a perfect family is the good communication of each member of the family. This study is important in how we learned the complexity of human relations, especially in the family.

scholarly journals Preparation and characterization of graphitic carbon nitride-supported l-arginine as a highly efficient and recyclable catalyst for the one-pot synthesis of condensation reactions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hossein Ghafuri ◽  
Zeinab Tajik ◽  
Nastaran Ghanbari ◽  
Peyman Hanifehnejad
Keyword(s):  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
The Novel ◽  
One Pot ◽  
Ft Ir ◽  
Quinazoline Derivatives ◽  
The One ◽  
Reaction Media

AbstractIn this work, graphitic carbon nitride-supported l-arginine (g-C3N4@l-arginine) nanocatalyst was synthesized and evaluated using FT-IR, EDX, XRD, TGA, and FESEM analyses. The performance of the prepared nanocatalyst was examined in the synthesis of 1,4-dihydropyridine, 4H-chromene, and 2,3-dihydro quinazoline derivatives. The novel g-C3N4@l-arginine nanocatalyst showed high thermal stability, easy separation from reaction media, the capability to be used in various multicomponent reactions, and acceptable reusability.

scholarly journals Combined Energy-Seismic Retrofit of Existing Historical Masonry Buildings: The Novel “DUO System” Coating System Applied to a Case Study

Heritage ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 4629-4646
Author(s):  
Antonio Formisano ◽  
Generoso Vaiano
Keyword(s):  
Building Envelope ◽  
Energetic Efficiency ◽  
The Novel ◽  
Fem Model ◽  
Masonry Construction ◽  
Non Linear ◽  
Historical Masonry ◽  
The One

The safety of the built heritage of our cities towards environmental factors and seismic actions is a pressing need for designers and researchers. The actual trend is to setup effective solutions to reduce thermal dispersions through the building envelope. Contrarily, combined systems able to enhance the resistance of constructions to earthquakes, on the one hand, and, on the other hand, to increase the energetic efficiency of existing buildings are scarcely diffused on the market and are rarely investigated in the scientific literature. In this framework, the seismic design of the new envelope DUO system for seismic-environmental requalification of existing masonry constructions is illustrated in the present paper with reference to a case study in the Neapolitan area. After the geometrical and mechanical characterization of the investigated building is performed, an FEM model of the masonry construction is setup by the SAP2000 analysis program, which has allowed performing pushover analyses. Based on the non-linear seismic response of the construction, an appropriate upgrading design mainly based on the innovative seismic envelope DUO system has been made. The static non-linear analyses applied to the upgraded FEM model of the building have shown a clear increase in performance in terms of strength, stiffness and ductility, thus confirming the effectiveness of the proposed envelope system.

Catheter-directed foam sclerotherapy treatment of saphenous vein incompetence

VASA ◽  
2012 ◽  
Vol 41 (2) ◽  
pp. 120-124 ◽  
Author(s):  
Asciutto ◽  
Lindblad
Keyword(s):  
Saphenous Vein ◽  
Short Term ◽  
Foam Sclerotherapy ◽  
Results Of Treatment ◽  
Ulcer Healing Rate ◽  
Complete Obliteration ◽  
Ceap Classification ◽  
One Year ◽  
The One

Background: The aim of this study is to report the short-term results of catheter-directed foam sclerotherapy (CDFS) in the treatment of axial saphenous vein incompetence. Patients and methods: Data of all patients undergoing CDFS for symptomatic primary incompetence of the great or small saphenous vein were prospectively collected. Treatment results in terms of occlusion rate and patients’ grade of satisfaction were analysed. All successfully treated patients underwent clinical and duplex follow-up examinations one year postoperatively. Results: Between September 2006 and September 2010, 357 limbs (337 patients) were treated with CDFS at our institution. Based on the CEAP classification, 64 were allocated to clinical class C3 , 128 to class C4, 102 to class C5 and 63 to class C6. Of the 188 patients who completed the one year follow up examination, 67 % had a complete and 14 % a near complete obliteration of the treated vessel. An ulcer-healing rate of 54 % was detected. 92 % of the patients were satisfied with the results of treatment. We registered six cases of thrombophlebitis and two cases of venous thromboembolism, all requiring treatment. Conclusions: The short-term results of CDFS in patients with axial vein incompetence are acceptable in terms of occlusion and complications rates.

Hidden “holes” in the capital of banks and the supply of credit to the real sector of economy

2018 ◽  
pp. 49-68 ◽  
Author(s):  
M. E. Mamonov
Keyword(s):  
Credit Risk ◽  
The Other ◽  
Real Sector ◽  
Capital Management ◽  
Loan Loss ◽  
Short Term ◽  
The Real ◽  
Ex Post ◽  
The One

Our analysis documents that the existence of hidden “holes” in the capital of not yet failed banks - while creating intertemporal pressure on the actual level of capital - leads to changing of maturity of loans supplied rather than to contracting of their volume. Long-term loans decrease, whereas short-term loans rise - and, what is most remarkably, by approximately the same amounts. Standardly, the higher the maturity of loans the higher the credit risk and, thus, the more loan loss reserves (LLP) banks are forced to create, increasing the pressure on capital. Banks that already hide “holes” in the capital, but have not yet faced with license withdrawal, must possess strong incentives to shorten the maturity of supplied loans. On the one hand, it raises the turnovers of LLP and facilitates the flexibility of capital management; on the other hand, it allows increasing the speed of shifting of attracted deposits to loans to related parties in domestic or foreign jurisdictions. This enlarges the potential size of ex post revealed “hole” in the capital and, therefore, allows us to assume that not every loan might be viewed as a good for the economy: excessive short-term and insufficient long-term loans can produce the source for future losses.

Elementy poetyki ludowej w powieści Rzeczy uprzyjemniające. Utopia T. Bołdak-Janowskiej

2020 ◽  
pp. 182-197
Author(s):  
Agnieszka Goral
Keyword(s):  
Fairy Tales ◽  
Text Analysis ◽  
Literary Text ◽  
Source Material ◽  
Human Existence ◽  
The Other ◽  
The Novel ◽  
Literary Works ◽  
The One ◽  
Cultural Features

The aim of the article is to analyse the elements of folk poetics in the novel Pleasant things. Utopia by T. Bołdak-Janowska. The category of folklore is understood in a rather narrow way, and at the same time it is most often used in critical and literary works as meaning a set of cultural features (customs and rituals, beliefs and rituals, symbols, beliefs and stereotypes) whose carrier is the rural folk. The analysis covers such elements of the work as place, plot, heroes, folk system of values, folk rituals, customs, and symbols. The description is conducted based on the analysis of source material as well as selected works in the field of literary text analysis and ethnolinguistics. The analysis shows that folk poetics was creatively associated with the elements of fairy tales and fantasy in the studied work, and its role consists of – on the one hand – presenting the folk world represented and – on the other – presenting a message about the meaning of human existence.

Dombey and Son

2008 ◽  
Author(s):  
Charles Dickens ◽  
Dennis Walder
Keyword(s):  
Family Relationships ◽  
The Sun ◽  
The Novel ◽  
The Earth ◽  
The Future ◽  
Original Illustrations ◽  
The One

Dombey and Son ... Those three words conveyed the one idea of Mr. Dombey's life. The earth was made for Dombey and Son to trade in, and the sun and moon were made to give them light.' The hopes of Mr Dombey for the future of his shipping firm are centred on his delicate son Paul, and Florence, his devoted daughter, is unloved and neglected. When the firm faces ruin, and Dombey's second marriage ends in disaster, only Florence has the strength and humanity to save her father from desolate solitude. This new edition contains Dickens's prefaces, his working plans, and all the original illustrations by ‘Phiz’. The text is that of the definitive Clarendon edition. It has been supplemented by a wide-ranging Introduction, highlighting Dickens's engagement with his times, and the touching exploration of family relationships which give the novel added depth and relevance.

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