Faito Southern Apennines — Italy was carried out in order to explore the connection between early dolomite formation and fluctuating climate conditions. The dolomitization intensity varies along the succession and reaches its peak in the upper Hauterivian-lower Barremian interval, where it is present a completely dolomitized interval about m-thick. Field relations, petrography, mineralogy, and geochemistry of the analyzed dolomite bodies allowed identifying two populations of early dolomites, a fine-medium crystalline FMdol and a coarse crystalline dolomite Cdol , both interpreted as the product of mesohaline water reflux. According to our interpretation, FMdol precipitated from concentrated brines in the very early stage of the reflux process, producing typical sedimentary features as dolomite caps. A peculiar feature of the studied succession is the great consistency between stratigraphic distribution of dolomite bodies and their geochemical signature. The completely dolomitized Hauterivian-Barremian interval, in fact, is characterized by geochemical values suggesting an origin from distinctly saltier brines.
4D ultrasound baby scans
You may like to take a look at charts for crown-rump length , biparietal diameter , femur length , abdominal circumference , gestational sac diameter , yolk sac diameter and intrauterine fetal weight. If you have problems understanding and calculating your due date, check out and download a copy of the Ob calculator by York Winston. Hutchon’s site and the Gestation Network also provide pregnancy calculators. A large number of mails I received are about fetal anomalies, I have therefore tried to put together a Catalogue of Web pages which describe in some detail specific congenital anomalies that are diagnosable by ultrasound.
You can visit the page here.
The Lenna (or Lena) picture is one of the most widely used standard test images used for compression algorithms. The ssion FAQ says the following. For the curious: ‘lena’ or ‘lenna’ is a digitized Playboy centerfold, from November
History Galton whistle, one of the first devices to produce ultrasound Acoustics , the science of sound , starts as far back as Pythagoras in the 6th century BC, who wrote on the mathematical properties of stringed instruments. Echolocation in bats was discovered by Lazzaro Spallanzani in , when he demonstrated that bats hunted and navigated by inaudible sound and not vision.
Francis Galton in invented the Galton whistle , an adjustable whistle which produced ultrasound, which he used to measure the hearing range of humans and other animals, demonstrating that many animals could hear sounds above the hearing range of humans. The first technological application of ultrasound was an attempt to detect submarines by Paul Langevin in The piezoelectric effect , discovered by Jacques and Pierre Curie in , was useful in transducers to generate and detect ultrasonic waves in air and water.
The Mosquito is an electronic device that uses a high pitched frequency to deter loitering by young people. Animals Bats use ultrasounds to navigate in the darkness. A dog whistle , a whistle which emits sound in the ultrasonic range, used to train dogs and other animals Bats use a variety of ultrasonic ranging echolocation techniques to detect their prey.
Toolkit: Adolescent Development Overview
What will you do with your scan photos? When will I have my dating scan? You’ll have a dating scan, also known as a week scan between about 10 weeks and 14 weeks of pregnancy. You’ll only have a scan before this, between six weeks and 10 weeks, if you’ve experienced bleeding , pain, or problems in a previous pregnancy Miscarriage Association nd. You’ll also be able to have an earlier scan if you’ve had recurrent miscarriages NICE
Piltdown Man–Eanthropus dawsoni or “dawn man.” Discovered in by Charles Dawson, a medical doctor and amateur paleontologist. Dawson found a mandible and a small piece of a skull in a gravel pit near Piltdown England.
The dating scan is usually done at some point between 8 weeks and 14 weeks pregnant. NICE recommends it’s done between 10 weeks and 13 weeks. You will have had earlier appointments and may have had an early scan if you’ve had any concerns such as bleeding , but otherwise this is the first time you’ll get to see your baby, so it’s a real milestone in your pregnancy.
What happens during the dating scan? Before the scan you will be asked to drink a lot of water and have a full bladder, as this puts the uterus in a better position to be scanned. This can be something of an uncomfortable challenge if your sonographer has particularly long waiting times. I had to drink so much bloody water before my scan only to find there was a delay before my appointment — I felt like I was going to explode. I’ll never forget one nurse asking me, ‘Do you think you could just pop to the loo and let just a little bit out?
The sonographer will tuck some tissues under your clothes so you don’t get gel all over them.
When will I have my first scan?
When will I have my first scan? Share Becky Rutherford Midwife sonographer If your pregnancy is going well, your first ultrasound scan will be your dating scan, between 10 weeks and 14 weeks of pregnancy. Early scan An early scan is offered from six weeks, so before your dating scan. Your midwife or GP will only recommend an early scan if there’s a concern, for example, if you’ve had bleeding in this pregnancy.
Your GP may also refer you for a scan if you’ve had a previous miscarriage.
Find out about ultrasound baby scans, including the dating scan and anomaly scan, to check for abnormalities in the baby during pregnancy.
The extra chromosome causes physical differences, developmental delays and a tendency toward certain health problems. This condition is incurable, but testing during pregnancy gives parents the chance to prepare for the unique needs of a child with birth defects, as well as identifying any specific abnormalities that may require medical care after birth. Therefore you should carefully consider the advantages and disadvantages of screening test such as FTS compared with a diagnostic test such as CVS or amniocentesis.
The most accurate way of estimating the chances of your baby having a chromosomal problem is the first trimester screening test of the nuchal translucency measurement combined with a blood test. Nuchal Translucency screening is a non invasive test and poses no risk to you or your baby. Nuchal Fold Scan — 11 — 14 weeks Cost: A blood sample is also requested to help identify any abnormalities.
Welcome to Merrion Fetal Health
Can the scan show the gender of my baby? What is actually done? Scans are usually performed by a doctors, midwives or radiographers who are specially trained in ultrasound, and are known as sonographers. The whole pregnancy will be assessed. The amount of liquor amniotic fluid , the position and appearance of the placenta and a detailed scan of the baby itself.
Private Ultrasound Babybond ® Pregnancy Scans Our Babybond ® Pregnancy Scans are suitable for all stages of your pregnancy, from the first Early Scan and NT Scan in your 1st trimester, to the Dating Scan, Gender Scans and NIPT Scan in your 2nd trimester, and finally to our detailed 4D Scan, Growth Scan and Presentation Scan in your 3rd trimester.
Available in a variety of formats, the resources below offer overviews of adolescent development. Also see Domains of Development for specific resources on cognitive, social, emotional, physical, and sexual development, as well as Identity Development. The Teen Years Explained: A Guide to Healthy Adolescent Development This guide describes the normal physical, cognitive, emotional and social, sexual, identity formation, and spiritual changes that happen during adolescence and how adults can promote healthy development.
Guide Adolescent Development This easy-to-read resource shares basic information about adolescent development including: Web Page Adolescent Development:
Australopithecus africanus — The word “Australopithecus” means “southern ape. Raymond Dart, professor of anatomy at Witwatersrand University in Johannesburg, was the first to study these fossils. In at Taung in South Africa, Dart discovered a fossil skull consisting of a full face, teeth and jaws, and an endocranial cast of the brain.
The brain size was cc. Its age is currently felt to be around two to three million years old.
The dating scan is usually done at some point between 8 weeks and 14 weeks recommends it’s done between 10 weeks and 13 weeks. You will have had earlier appointments and may have had an early scan if you’ve had any concerns such as bleeding, but otherwise this is the first time you’ll get to see your baby, so it’s a real milestone in your pregnancy.
Doppler Ultrasound The doppler shift principle has been used for a long time in fetal heart rate detectors. Further developments in doppler ultrasound technology in recent years have enabled a great expansion in its application in Obstetrics, particularly in the area of assessing and monitoring the well-being of the fetus, its progression in the face of intrauterine growth restriction, and the diagnosis of cardiac malformations.
Doppler ultrasound is presently most widely employed in the detection of fetal cardiac pulsations and pulsations in the various fetal blood vessels. The “Doptone” fetal pulse detector is a commonly used handheld device to detect fetal heartbeat using the same doppler principle. Blood flow characteristics in the fetal blood vessels can be assessed with Doppler ‘flow velocity waveforms’. Diminished flow, particularly in the diastolic phase of a pulse cycle is associated with compromise in the fetus.
Various ratios of the systolic to diastolic flow are used as a measure of this compromise. The blood vessels commonly interrogated include the umbilical artery , the aorta , the middle cerebral arteries , the uterine arcuate arteries , and the inferior vena cava. The use of color flow mapping can clearly depict the flow of blood in fetal blood vessels in a realtime scan, the direction of the flow being represented by different colors.
Color doppler is particularly indispensible in the diagnosis of fetal cardiac and blood vessel defects , and in the assessment of the hemodynamic responses to fetal hypoxia and anemia. A more recent development is the Power Doppler Doppler angiography. It uses amplitude information from doppler signals rather than flow velocity information to visualize slow flow in smaller blood vessels.
What to expect from your 12-week pregnancy scan
Each of our early pregnancy scans come complete with a medical report. If you feel weekly scans will offer more reassurance during the early weeks of pregnancy then these can be arranged in addition to this package. The primary purpose of this scan is to confirm viability of an intrauterine pregnancy and determine well-being. The scans will last about 10 minutes and a 2D scan picture will be given to you to take home and keep.
Changing just one character on your online dating profile can boost your response rate by 79%.
History of Technology Heroes and Villains – A little light reading Here you will find a brief history of technology. Initially inspired by the development of batteries, it covers technology in general and includes some interesting little known, or long forgotten, facts as well as a few myths about the development of technology, the science behind it, the context in which it occurred and the deeds of the many personalities, eccentrics and charlatans involved.
You may find the Search Engine , the Technology Timeline or the Hall of Fame quicker if you are looking for something or somebody in particular. Scroll down and see what treasures you can discover. Background We think of a battery today as a source of portable power, but it is no exaggeration to say that the battery is one of the most important inventions in the history of mankind. Volta’s pile was at first a technical curiosity but this new electrochemical phenomenon very quickly opened the door to new branches of both physics and chemistry and a myriad of discoveries, inventions and applications.
The electronics, computers and communications industries, power engineering and much of the chemical industry of today were founded on discoveries made possible by the battery. Pioneers It is often overlooked that throughout the nineteenth century, most of the electrical experimenters, inventors and engineers who made these advances possible had to make their own batteries before they could start their investigations.
They did not have the benefit of cheap, off the shelf, mass produced batteries. For many years the telegraph, and later the telephone, industries were the only consumers of batteries in modest volumes and it wasn’t until the twentieth century that new applications created the demand that made the battery a commodity item.