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Reception of Low Frequency Time Signals
Reprinted from I-This reDort show: the Dossibilitks of clock svnchronization using time signals I 9 transmitted at low frequencies. The study was madr by obsirvins pulses Vol. 6, NO. 9, pp 13-21 emitted by HBC (75 kHr) in Switxerland and by WWVB (60 kHr) in tha United States. (September 1968), The results show that the low frequencies are preferable to the very low frequencies. Measurementi show that by carefully selecting a point on the decay curve of the pulse it is possible at distances from 100 to 1000 kilo- meters to obtain time measurements with an accuracy of +40 microseconds. A comparison of the theoretical and experimental reiulb permib the study of propagation conditions and, further, shows the drsirability of transmitting I seconds pulses with fixed envelope shape. RECEPTION OF LOW FREQUENCY TIME SIGNALS DAVID H. ANDREWS P. E., Electronics Consultant* C. CHASLAIN, J. DePRlNS University of Brussels, Brussels, Belgium 1. INTRODUCTION parisons of atomic clocks, it does not suffice for clock For several years the phases of VLF and LF carriers synchronization (epoch setting). Presently, the most of standard frequency transmitters have been monitored accurate technique requires carrying portable atomic to compare atomic clock~.~,*,3 clocks between the laboratories to be synchronized. No matter what the accuracies of the various clocks may be, The 24-hour phase stability is excellent and allows periodic synchronization must be provided. Actually frequency calibrations to be made with an accuracy ap- the observed frequency deviation of 3 x 1o-l2 between proaching 1 x 10-11. It is well known that over a 24- cesium controlled oscillators amounts to a timing error hour period diurnal effects occur due to propagation of about 100T microseconds, where T, given in years, variations. -
Identification of Novel HPFH-Like Mutations by CRISPR Base Editing That Elevates the Expression of Fetal Hemoglobin
bioRxiv preprint doi: https://doi.org/10.1101/2020.06.30.178715; this version posted July 1, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Identification of novel HPFH-like mutations by CRISPR base editing that elevates the expression of fetal hemoglobin Nithin Sam Ravi1,3, Beeke Wienert4,8,9, Stacia K. Wyman4, Jonathan Vu4, Aswin Anand Pai2, Poonkuzhali Balasubramanian2, Yukio Nakamura7, Ryo Kurita10, Srujan Marepally1, Saravanabhavan Thangavel1, Shaji R. Velayudhan1,2, Alok Srivastava1,2, Mark A. DeWitt 4,5, Jacob E. Corn4,6, Kumarasamypet M. Mohankumar1* 1. Centre for Stem Cell Research (a unit of inStem, Bengaluru), Christian Medical College Campus, Bagayam, Vellore-632002, Tamil Nadu, India. 2. Department of Haematology, Christian Medical College Hospital, IDA Scudder Rd, Vellore-632002, Tamil Nadu, India. 3. Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram - 695 011, Kerala, India. 4. Innovative Genomics Institute, University of California Berkeley, Berkeley, California- 94704, USA. 5. Department of Microbiology, Immunology, and Molecular Genetics, University of California - Los Angeles, Los Angeles, California - 90095, USA. 6. Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Otto-Stern- Weg, Zurich - 8092, Switzerland. 7. Cell Engineering Division, RIKEN BioResource Center, Tsukuba, Ibaraki 305-0074, Japan. 8. Institute of Data Science and Biotechnology, Gladstone Institutes, San Francisco, California -94158, USA 9. School of Biotechnology and Biomolecular Sciences, University of New South Wales - 2052, Sydney, Australia. 10. Research and Development Department Central Blood Institute Blood Service Headquarters Japanese Red Cross Society, 2-1-67 Tatsumi, Tokyo, 135-8521, Japan *Corresponding Author: Dr. -
Tigersharc Embedded Processor ADSP-TS101S
TigerSHARC Embedded Processor ADSP-TS101S FEATURES BENEFITS 300 MHz, 3.3 ns instruction cycle rate Provides high performance Static Superscalar DSP opera- 6M bits of internal—on-chip—SRAM memory tions, optimized for telecommunications infrastructure 19 mm × 19 mm (484-ball) CSP-BGA or 27 mm × 27 mm and other large, demanding multiprocessor DSP (625-ball) PBGA package applications Dual computation blocks—each containing an ALU, a multi- Performs exceptionally well on DSP algorithm and I/O bench- plier, a shifter, and a register file marks (see benchmarks in Table 1 and Table 2) Dual integer ALUs, providing data addressing and pointer Supports low overhead DMA transfers between internal manipulation memory, external memory, memory-mapped peripherals, Integrated I/O includes 14-channel DMA controller, external link ports, other DSPs (multiprocessor), and host port, 4 link ports, SDRAM controller, programmable flag processors pins, 2 timers, and timer expired pin for system integration Eases DSP programming through extremely flexible instruc- 1149.1 IEEE compliant JTAG test access port for on-chip tion set and high-level language-friendly DSP architecture emulation Enables scalable multiprocessing systems with low commu- On-chip arbitration for glueless multiprocessing with up to nications overhead 8 TigerSHARC processors on a bus COMPUTATIONAL BLOCKS PROGRAM SEQUENCER DATA ADDRESS GENERATION INTERNAL MEMORY 6 MEMORY MEMORY MEMORY JTAG PORT SHIFTER PC BTB IRQ INTEGER 32 32 INTEGER M0 M1 M2 JALU KALU ADDR 64K × 32 64K × 32 64K × 32 SDRAM CONTROLLER -
HISTORY of the NATIONAL CATHOLIC COMMITTEE for GIRL SCOUTS and CAMP FIRE by Virginia Reed
Revised 3/11/2019 HISTORY OF THE NATIONAL CATHOLIC COMMITTEE FOR GIRL SCOUTS AND CAMP FIRE By Virginia Reed The present National Catholic Committee for Girl Scouts and Camp Fire dates back to the early days of the Catholic Youth Organization (CYO) and the National Catholic Welfare Conference. Although it has functioned in various capacities and under several different names, this committee's purpose has remained the same: to minister to the Catholic girls in Girl Scouts (at first) and Camp Fire (since 1973). Beginnings The relationship between Girl Scouting and Catholic youth ministry is the result of the foresight of Juliette Gordon Low. Soon after founding the Girl Scout movement in 1912, Low traveled to Baltimore to meet James Cardinal Gibbons and consult with him about her project. Five years later, Joseph Patrick Cardinal Hayes of New York appointed a representative to the Girl Scout National Board of Directors. The cardinal wanted to determine whether the Girl Scout program, which was so fine in theory, was equally sound in practice. Satisfied on this point, His Eminence publicly declared the program suitable for Catholic girls. In due course, the four U.S. Cardinals and the U.S. Catholic hierarchy followed suit. In the early 1920's, Girl Scout troops were formed in parochial schools and Catholic women eagerly became leaders in the program. When CYO was established in the early 1930's, Girl Scouting became its ally as a separate cooperative enterprise. In 1936, sociologist Father Edward Roberts Moore of Catholic charities, Archdiocese of New York, studied and approved the Girl Scout program because it was fitting for girls to beome "participating citizens in a modern, social democracy." This support further enhanced the relationship between the Catholic church and Girl Scouting. -
Time Signal Stations 1By Michael A
122 Time Signal Stations 1By Michael A. Lombardi I occasionally talk to people who can’t believe that some radio stations exist solely to transmit accurate time. While they wouldn’t poke fun at the Weather Channel or even a radio station that plays nothing but Garth Brooks records (imagine that), people often make jokes about time signal stations. They’ll ask “Doesn’t the programming get a little boring?” or “How does the announcer stay awake?” There have even been parodies of time signal stations. A recent Internet spoof of WWV contained zingers like “we’ll be back with the time on WWV in just a minute, but first, here’s another minute”. An episode of the animated Power Puff Girls joined in the fun with a skit featuring a TV announcer named Sonny Dial who does promos for upcoming time announcements -- “Welcome to the Time Channel where we give you up-to- the-minute time, twenty-four hours a day. Up next, the current time!” Of course, after the laughter dies down, we all realize the importance of keeping accurate time. We live in the era of Internet FAQs [frequently asked questions], but the most frequently asked question in the real world is still “What time is it?” You might be surprised to learn that time signal stations have been answering this question for more than 100 years, making the transmission of time one of radio’s first applications, and still one of the most important. Today, you can buy inexpensive radio controlled clocks that never need to be set, and some of us wear them on our wrists. -
STANDARD FREQUENCIES and TIME SIGNALS (Question ITU-R 106/7) (1992-1994-1995) Rec
Rec. ITU-R TF.768-2 1 SYSTEMS FOR DISSEMINATION AND COMPARISON RECOMMENDATION ITU-R TF.768-2 STANDARD FREQUENCIES AND TIME SIGNALS (Question ITU-R 106/7) (1992-1994-1995) Rec. ITU-R TF.768-2 The ITU Radiocommunication Assembly, considering a) the continuing need in all parts of the world for readily available standard frequency and time reference signals that are internationally coordinated; b) the advantages offered by radio broadcasts of standard time and frequency signals in terms of wide coverage, ease and reliability of reception, achievable level of accuracy as received, and the wide availability of relatively inexpensive receiving equipment; c) that Article 33 of the Radio Regulations (RR) is considering the coordination of the establishment and operation of services of standard-frequency and time-signal dissemination on a worldwide basis; d) that a number of stations are now regularly emitting standard frequencies and time signals in the bands allocated by this Conference and that additional stations provide similar services using other frequency bands; e) that these services operate in accordance with Recommendation ITU-R TF.460 which establishes the internationally coordinated UTC time system; f) that other broadcasts exist which, although designed primarily for other functions such as navigation or communications, emit highly stabilized carrier frequencies and/or precise time signals that can be very useful in time and frequency applications, recommends 1 that, for applications requiring stable and accurate time and frequency reference signals that are traceable to the internationally coordinated UTC system, serious consideration be given to the use of one or more of the broadcast services listed and described in Annex 1; 2 that administrations responsible for the various broadcast services included in Annex 2 make every effort to update the information given whenever changes occur. -
Vialitehd-EDFA-Datasheet-HRA-X-DS-1
www.vialite.com +44 (0)1793 784389 [email protected] +1 (855) 4-VIALITE [email protected] ® ViaLiteHD – EDFA Erbium-Doped Fiber Amplifiers (EDFA) Next generation variable gain EDFA Single or multi-channel EDFA available 8 dB to 36 dB gain variants SNMP and RS232 control Fast start-up time EDFA AGC (Automatic gain control) Bi directional Option Standard 5-year warranty The ViaLiteHD Eribium Doped Fiber Amplifier (EDFA) is available in either a single channel or multi-channel format depending on where it is utilized in the system. The EDFAs have low noise figures and variable gain ensuring the optimization of link noise figure and performance. They are available as part of a Ka-Band diversity antenna system, ultra-long distance system (up to 600 km) or as a stand-alone product. Options Low noise figure SNMP and RS232 control Fixed gain, auto power control, auto gain control software selectable Low switching time 8 dB, 18 dB, 20 dB, 23 dB, 24 dB, 33 dB or 36 dB gain (other gain variants available) Single channel or multiple channel Applications Formats 1U Chassis Ka-Band diversity rain fade application Fixed satcom earth stations and teleports Related Products Gateway reduction within a satellite footprint 50 km 1550 nm L-Band HTS Government installations 50 Ohm DWDM L-Band HTS Remote monitoring stations >50 km systems Remote oil and gas locations DWDM Multiplexers Remote wind farm locations Optical Switches Optical Delay Lines Popular products HRA-3-0B-8T-AF-D001 – ViaLiteHD EDFA, 24 dB Optical Amplifier, single channel HRA-4-0B-8T-AB-D008 -
Manual WTD 868T-V2 Transmitter EN Download
INSTRUCTION MANUAL Wireless Time Distribution WTD 868-T-V2 © MOBATIME BE-800905.01 Manufacturer’s Certificate STANDARDS The WTD 868-T-V2 time signal transmitter was developed and produced in accordance with the EU guideline 1999 / 5 / EWG Notes to the Instruction Manual 1. The information contained in this instruction manual can be changed at any time without prior notice. The current version is available for downloading under www.mobatime.com. 2. This instruction manual was compiled with the utmost care to provide all the details regarding the use of this product. However, should you have any queries, or find any errors in the instructions, please contact us. 3. We will not accept any liability for any damages resulting, directly or indirectly, from the use of this instruction manual. 4. Please read these instructions carefully and only use the product when all the instructions on installing and operating have been correctly understood. 5. Installation may only be carried out by qualified personnel. 6. This publication, or any extracts from it, may not be reproduced, stored in a electronic retrieval system, or in any way transmitted. The copyright with all its rights lies with BÜRK MOBATIME GmbH, D-78026 VS-Schwenningen and MOSER-BAER AG, CH–3454 Sumiswald / Switzerland. © MOBATIME 2 / 20 800905.01 Contents 1 Introduction..................................................................................................................................................4 2 Hardware Description .................................................................................................................................5 -
Roman Catholic High School
Fall 2020 The Official Magazine for Alumni, Family and Friends of Roman Catholic High School 2019–20 Annual Report Table of Contents The Letters from the Presidents 3 News Around Roman 4 Congratulations to the Class of 2020 7 RCHS Mission A Message to the Class of 2020 8 Roman Reflections 10 The Administration of Roman Catholic High School 12 Meet the Office of Mission Advancement 14 Alumni Resources 16 Update On Homecoming 2020 and Other Events/ Reunions 16 Roman Catholic High School 2019–20 Annual Report 17 Ways to Continue the Cahill Legacy 18 Photo Credit: Patrick Sweeney ’15 Profiles: Founded by Thomas E. Cahill in 1890 as the first free Patty Griffin & Bob Eells 23 Diocesan Catholic high school for boys in the nation, Pat Shanahan 26 Roman Catholic continues its tradition of excellence as Dom Joseph – Class of 2007 33 it strives to offer a comprehensive academic curriculum Jerry Vetter – Class of 1975 41 within a disciplined Catholic environment. Enriched by Rebecca Devine 46 its cultural, racial, and religious diversity, Roman Catholic Business Spotlight: provides a community where each young man can learn Vietnam Restaurant/Cafe 49 to appreciate and respect the uniqueness of others, while Class Notes 50 becoming a man of personal integrity. Roman Catholic In Memoriam 55 High School strives to bring the Gospel values of Jesus Christ to its students, while forming a Catholic community On the cover: The bust of Roman’s Founder, Thomas E. Cahill, which embodies the Christian spirit of service to all. follows proper pandemic protocol and wears a face mask. -
Time and Frequency Users Manual
A 11 10 3 07512T o NBS SPECIAL PUBLICATION 559 J U.S. DEPARTMENT OF COMMERCE / National Bureau of Standards Time and Frequency Users' Manual NATIONAL BUREAU OF STANDARDS The National Bureau of Standards' was established by an act of Congress on March 3, 1901. The Bureau's overall goal is to strengthen and advance the Nation's science and technology and facilitate their effective application for public benefit. To this end, the Bureau conducts research and provides: (1) a basis for the Nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau's technical work is per- formed by the National Measurement Laboratory, the National Engineering Laboratory, and the Institute for Computer Sciences and Technology THE NATIONAL MEASUREMENT LABORATORY provides the national system of physical and chemical and materials measurement; coordinates the system with measurement systems of other nations and furnishes essential services leading to accurate and uniform physical and chemical measurement throughout the Nation's scientific community, industry, and commerce; conducts materials research leading to improved methods of measurement, standards, and data on the properties of materials needed by industry, commerce, educational institutions, and Government; provides advisory and research services to other Government agencies; develops, produces, and distributes Standard Reference Materials; and provides -
Synchronizing Time with Dcf77 and Msf60
SYNCHRONIZING TIME WITH DCF77 AND MSF60 In many of the applications that use the H0420 and Starling programmable audio controllers/players, clock synchronization is a requirement. This is especially the case with the H0420, because it lacks a battery backup for its internal real-time clock —hence, when there is a power drop-out (even for less than a second), the H0420 resets to 1 January 1970 at 00:00 hours. Even with a backup battery for the real-time clock, when the device is used outdoor, you may observe the clock on the H0420 or Starling to deviate from the true time. The reason is that the crystals used for timekeeping are calibrated for use at room temperature. The time that the device resets to after power-up, of 1 January 1970 at 00:00 hours, is the "start of the Unix era". This is a commonly used basis for time keeping in operating systems and embedded devices; see the Wikipedia article in the references. For keeping the time of the H0420/Starling accurate, there are two options: get the time from the network (a typical option for the Starling, as it has a network port), or get the time from some other source, such as a radio signal. This latter option is suitable when no network is available at the location, which is common in outdoor use. This article specifically discusses how to pick up the current "time of the day" from DCF77 signal, but also discusses MSF60. A particular advantages of synchronizing on a time signal radio station is that "daylight saving time" is automatically handled. -
Christ, the Savior Is Born!
The 6 1966-201 50th A nniversaryCatholicWitness The Newspaper of the Diocese of Harrisburg December 23, 2016 Vol. 50 No. 24 The Christmas artwork pictured here was created by two of the four winners of Christ, the Savior Bishop Ronald Gainer’s 2016 Christmas Card Contest. The contest allowed students to is Born! portray an interpretation of the birth of Jesus Christ as seen through their eyes. Four winners were selected from contest entries among four age categories. The illustration at the bottom is by Annie St. Denis, a senior at Lancaster Catholic High School, and the illustration at the top is by Abigail Sell, an eighth-grader at Annunciation BVM School in McSherrystown. The other two winning images were featured on the cover of the December 9 edition of The Catholic Witness. The four winning pieces will be used as illustrations on Bishop Gainer’s Christmas cards this year. The people who walked in darkness have seen a great light; upon those who dwelt in the land of gloom a light has shone. You have brought them abundant joy and great rejoicing, as they rejoice before you as at the harvest, as people make merry when dividing spoils. For the yoke that burdened them, the pole on their shoulder, and the rod of their taskmaster you have smashed, as on the day of Midian. For every boot that tramped in battle, every cloak rolled in blood, will be burned as fuel for flames. For a child is born to us, a son is given us; upon his shoulder dominion rests.