Dating you

Join now and take the first step towards

Password:

Email address:

I have read the Terms of use and Privacy policy governing membership of the site and agree to their content. I grant consent to the use of cookies as defined in the Privacy policy and confirm that I am over 18 years of age.

Search Telegraph Dating

Success Stories - Telegraph Dating members share their experiences

Guardian Soulmates

If you're looking for love you've come to the right place: welcome to Soulmates, the Guardian's online dating service. We offer dating services to all, including straight and gay dating. lesbian dating. dating for professionals, dating in London. and UK dating. Visit the Soulmates blog for dating tips and more information.

Join Soulmates and meet someone worth meeting

Radiometric dating

Radiometric dating (often called radioactive dating ) is a technique used to date materials such as rocks or carbon, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates. [ 1 ] The use of radiometric dating was first published in 1907 by Bertram Boltwood [ 2 ] and is now the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials. Together with stratigraphic principles. radiometric dating methods are used in geochronology to establish the geological time scale. [ 3 ] Among the best-known techniques are radiocarbon dating. potassium-argon dating and uranium-lead dating. By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change. Radiometric dating is also used to date archaeological materials, including ancient artifacts.

Different methods of radiometric dating vary in the timescale over which they are accurate and the materials to which they can be applied.

Radioactive decay [ edit ]

Example of a radioactive decay chain from lead-212 ( 212 Pb) to lead-208 ( 208 Pb). Each parent nuclide spontaneously decays into a daughter nuclide (the decay product ) via an ? decay or a ? ? decay. The final decay product, lead-208 ( 208 Pb), is stable and can no longer undergo spontaneous radioactive decay.

All ordinary matter is made up of combinations of chemical elements. each with its own atomic number. indicating the number of protons in the atomic nucleus. Additionally, elements may exist in different isotopes. with each isotope of an element differing in the number of neutrons in the nucleus. A particular isotope of a particular element is called a nuclide. Some nuclides are inherently unstable. That is, at some point in time, an atom of such a nuclide will undergo radioactive decay and spontaneously transform into a different nuclide. This transformation may be accomplished in a number of different ways, including alpha decay (emission of alpha particles ) and beta decay (electron emission, positron emission, or electron capture ). Another possibility is spontaneous fission into two or more nuclides.

For most radioactive nuclides, the half-life depends solely on nuclear properties and is essentially a constant. It is not affected by external factors such as temperature. pressure. chemical environment, or presence of a magnetic or electric field. [ 4 ] [ 5 ] [ 6 ] The only exceptions are nuclides that decay by the process of electron capture. such as beryllium-7. strontium-85. and zirconium-89. whose decay rate may be affected by local electron density. For all other nuclides, the proportion of the original nuclide to its decay products changes in a predictable way as the original nuclide decays over time. This predictability allows the relative abundances of related nuclides to be used as a clock to measure the time from the incorporation of the original nuclides into a material to the present.

Loveisrespect. org

Ending Unhealthy Relationships

Today's post was written by Alexis O. a member of the National Youth Advisory Board. To learn more about the NYAB, click here .

When I was growing up, I watched my mother fall in and out of love with men who were nothing but bad for her. There was never a day when my mother and her man of the week weren’t at each others throats, and I watched, day after day as he verbally and physically abused her. Later in the day she would go crawling back, because she thought no one else would want her - a thought put in her head by the same person who had earlier called her a “stupid slut.” I always knew somewhere deep down that their behavior was abnormal, and I swore to myself to never end up like my mother had.

And I have not. Very few people know about the way I grew up. I disclose as little of my past as possible, because I believe that my past is no longer a part of me. But everyone knows about my refusal to be treated as less than, and my boyfriends over the years have had to learn that as well. There has only been one incident where my partner treated me as less than a goddess and in the end, I broke up with him.

I say that like it was easy, though. It was not. I knew that he was wrong for me from the minute he told me that I was his girlfriend so he could do whatever he wanted to me, whenever he wanted. This came after I got angry with him for being too clingy and grabby in public. When I thought it over later and decided to break up with him, I tried. But he cried and told me he was sorry, and that it would never happen again, and that he loved me more than anyone he had ever met, and I couldn’t do it. That’s the thing about abusers. They are not wholly evil. And they are damn good liars that sometimes they even fool themselves. But if they get away with something once, they start pushing their boundaries and pretty soon they are telling you that they didn’t rape you because you never said no, in fact you didn’t say anything. That’s when I realized if I didn’t break up with this boy, I would marry him and have children with him and be forced to spend my life with a man I didn’t love telling me that what I did or didn’t want wasn’t important. I remembered that promise I made to myself as I little girl to never end up like my mother, and I left.

The thing about unhealthy relationships is that we want to believe that person can change. We want to believe that if we stick around they will stop insulting us to keep us with them longer. That they will get over their rough patch in life and they won’t have to hit us when we mess up. But I am here to tell you as a survivor of multiple types of abuse that they don’t change, and it is important to realize that. I wish I could say that you can change them. That if you want it enough, and try enough, your partner will stop hitting you, insulting you, isolating you. But for a person to change, they have to want it, and abusers are oftentimes in denial about who they are, so they are going to get angry for you even suggesting there is something wrong with who they are as a person. If you find yourself dating someone who hits you, even once, it's not okay. You have the right to tell someone. Your partner is going to make you feel like you are scum for trying to make them look bad, but you should not be ashamed of defending yourself, and preserving your well-being. It is not your fault they abuse you, physically, verbally, or emotionally. It is never your fault.

Healthy relationships should be based off of equality and respect, not control and power. In a healthy relationship you are not afraid of your partner's anger, because they aren’t a threat to you. You feel safe, supported, happy, and excited to be around each other. You respect each other, have lives that are separate from each other, but can come back and be a unit at any given time. In healthy relationships, both parties have a right to privacy. If your partner is forcing you to allow them to read your text messages or emails or Facebook messages, there is a problem.

Remember, love is respect. And you deserve that. Don’t settle for anything less.

If you are seeing some of the warning signs that your relationship might be unhealthy or abusive, our peer advocates are here to help! Call, chat or text anytime, 24/7.

Online dating service

From Wikipedia, the free encyclopedia

Online dating ( OD ) or Internet dating is a personal introductory system whereby individuals can find and contact each other over the Internet to arrange a date. usually with the objective of developing a personal, romantic, or sexual relationship. Online dating services usually provide unmoderated matchmaking over the Internet. through the use of personal computers or cell phones. Users of an online dating service would usually provide personal information, to enable them to search the service provider's database for other individuals. Members use criteria other members set, such as age range, gender and location.

Online dating sites use market metaphors to match people. Match Metaphors are conceptual frameworks that allow individuals to make sense of new concepts by drawing upon familiar experiences and frame-works. This metaphor of the marketplace – a place where people go to “shop” for potential romantic partners and to “sell” themselves in hopes of creating a successful romantic relationship – is highlighted by the layout and functionality of online dating websites. The marketplace metaphor may also resonate with participants’ conceptual orientation towards the process of? nding a romantic partner. [ 1 ] Most sites allow members to upload photos or videos of themselves and browse the photos and videos of others. Sites may offer additional services, such as webcasts. online chat. telephone chat (VOIP ), and message boards. Some sites provide free registration, but may offer services which require a monthly fee. Other sites depend on advertising for their revenue. Some sites such as OKCupid, Plenty of Fish and Badoo are free and offer additional paid services in a freemium revenue model. [ 2 ]

Some sites are broad-based, with members coming from a variety of backgrounds looking for different types of relationships. Other sites are more specific, based on the type of members, interests, location, or relationship desired. A 2005 study of data collected by the Pew Internet & American Life Project found that individuals are more likely to use an online dating service if they use the internet for a greater amount of tasks and less likely to use such a service if they are trusting of others. [ 3 ]