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User:RonHalifax

Ron is a 50+ year resident of Florida and worked as a professional electronics design engineer, software design engineer and engineering technical writer/educator during these past 5-decades. In his professional engineering career he has also researched, written, illustrated and published more than 200 engineering technical books and computer related equipment user guides. Ron is currently a local web developer with over 35 websites to his credit and a book publisher. Throughout his life Ron has advanced his knowledge working with graphic art design and advanced graphics software incorporating these skills and keen eye for detail into his projects. Ron always says, “You must understand the problem before you can fix the problem…”

In early 2006, Ron wrote his first account of local history “Our Place in History – Ormond Beach, Florida” and dedicated it to Don Bostrom, the past President of the Ormond Beach Historical Trust. Following this endeavor, having researched our local history in depth, Ron wrote and published “John Anderson, His Life and Times in Ormond, Florida.” My wife Alice and I knew we were on the road to success when Don Bostrom, grandson of Ormond Beach, Florida founder - John Andrew Bostrom,  proclaimed publicly, at a talk at the Ormond Beach Public Library, Ron and Alice are “The Ambassadors of History.”

As an active board member of the Ormond Beach Historical Society and several other local historical organizations, Ron has recently written and co-authored with his wife, Alice, several books and films about Ormond, Daytona and Volusia County history. Ron currently serves on the Volusia County Historical Preservation Board which has enriched his knowledge of local history and provided hands on involvement in Florida history preservation. Since 2006, Ron and Alice have given hundreds of talks and reenactments throughout Volusia and Flagler counties while researching local history and publishing several early Florida history books...

title: User:RonHalifax


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User:R.Boorman

Mathematics student from the UK, working to create and improve materials here for A-Level Mathematics

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: User:R.Boorman


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Talk:Parallel Spectral Numerical Methods/Finding Derivatives using Fourier Spectral Methods

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Nullifying the Nyquist term when computing the odd-order derivatives mentioned in the article is very important, and should be emphasized. It is worth also to mention that this is needed for derivatives of functions which are real in the time domain (.i.e., when applying real-to-complex Fourier transform). In the frequency domain, the data for the negative frequencies is complex-conjugate to the data for the corresponding positive frequencies. The Nyquist frequency can be considered both positive and negative (the Nyquist term separates the terms with the positive and negative frequencies), thus the Nyquist term should be complex-conjugate to itself, which means that this term is real (similarly to the dc term). After multiplication by (i omega), the Nyquist term becomes pure imaginary; still, it has to be complex-conjugate to itself, therefore we nullify the Nyquist term when computing the odd-order derivatives.

It is also worth to mention, that if the number of samples is odd, then the Nyquist term does not exist. It seems that in the Matlab numerical example, the number of samples is even (100), but the Nyquist term was not set to zero.

Another important thing is that it may be worth to comment about computing integrals (anti-derivatives) in the Fourier space by dividing by (i omega), except, of course, the dc term with omega = 0. This term can be considered the delta-function, whose inverse transform is the constant value, to be established from the initial conditions in the data space. 76.226.76.104 (discuss) 07:16, 18 January 2021 (UTC)


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User:Indiphile tukela

The Devil's Son.

''15may 1989 on sunday morning a son was born,non knew what this hold except the mother's son and grandmother. The son was named Thomas after his grandfather,one lazy morning while Thomas was playing peek-aboo with his sister he vanished into thin air.''

title: User:Indiphile tukela


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Radiation Oncology/China

Cancer Epidemiology
(1) Lung cancer (2) Breast cancer (3) Gastric cancer (4) Colorectal cancer (5) Liver cancer (6) Esophageal cancer (7) Thyroid cancer (8) Cervical cancer (9) Brain cancer (10) Pancreatic cancer (1) Lung cancer (2) Gastric cancer (3) Liver cancer (4) Colorectal cancer (5) Esophageal cancer (6) Prostate cancer (7) Bladder cancer (8) Pancreatic cancer (9) Brain cancer (10) Lymphoma (1) Breast cancer (2) Lung cancer (3) Colorectal cancer (4) Thyroid cancer (5) Gastric cancer (6) Cervical cancer (7) Liver cancer (8) Esophageal cancer (9) Uterine cancer (10) Brain cancer
 * In 2018, there were approximately 18.1 million new cancer cases and 9.6 million cancer deaths worldwide
 * Among the 18.1 million new cancer cases, Asia accounted for nearly half
 * Among the 9.6 million cancer deaths, Asia accounted for nearly 70%
 * Lung cancer is still the number one malignant tumor with morbidity (11.6%) and mortality (18.4%)
 * The incidence rate was followed by female breast cancer (11.6%), prostate cancer (7.1%), colorectal cancer (6.1%); the death rate was followed by colorectal cancer (9.2%), stomach cancer (8.2%), liver cancer (8.2%)
 * After suffering from cancer, the mortality rate of men was much higher than that of women
 * Among the 18.1 million new cancer cases, 9.5 million were men, and Asian men accounted for nearly half of the total number of cases; the mortality rate was 60%
 * There were 8.6 million new cancer patients among women, and Asian women accounted for 47.5% of the incidence; the mortality rate was just over half
 * China's cancer incidence and death rate ranked first in the world
 * Among the 18 million new cancer cases and 9.6 million cancer deaths, the number of new cases in China accounted for 3.804 million and the number of deaths accounted for 2.296 million
 * Compared with other countries, China ranked first in the world in cancer incidence and mortality
 * For every 100 new cancer patients in the world, 21 are Chinese
 * More than 10,000 people were diagnosed with cancer every day in China, and an average of 7 people got cancer every minute
 * On average, more than 6000 people died of cancer every day, and nearly 5 people died of cancer every minute
 * Cancer incidence in China (2018):
 * Cancer incidence in China (2018, male):
 * Cancer incidence in China (2018, female):
 * Compared with the world, lung cancer was also the cancer with the highest incidence in China
 * However, compared with the world, China's digestive system cancers such as colorectal cancer, liver cancer, esophageal cancer, and stomach cancer still accounted for a large proportion
 * Bray F, Ferlay J, Soerjomataram I, et al. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries[J]. CA Cancer J Clin. 2018 Nov;68(6):394-424. doi: 10.3322/caac.21492. ( 30207593)

Radiation Oncology

 * MENG, Xue; YU, Jin-ming. Advances of radiation oncology in China. Chinese Medical Journal: October 2009 - Volume 122 - Issue 19 - p 2231-2235. doi: 10.3760/cma.j.issn.0366-6999.2009.19.007
 * Weibo Yin et al. Int J Radiat Oncol Biol Phys. 2008. The growth of radiation oncology in mainland China during the last 10 years ( 18262091)
 * Institute of modern physics, Chinese Academy of Sciences (中国科学院近代物理研究所)
 * The Chinese Clinical Oncology (CCO; Chin Clin Oncol; Print ISSN 2304-3865; Online ISSN 2304-3873)

title: Radiation Oncology/China


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Talk:Calculus/Derivatives of multivariate functions

Untitled
On the matrix of the first section, The matrix of a linear transformation, shouldn't the matrix go all the way to $$a_{m,n}$$ instead of $$a_{n,n}$$? As we're talking about a transformation $$L:\R^n\to\R^m$$?

I am really not very confident at Math, so I got confused. If I multiply an $$N \times N$$ matrix by an $$N$$-dimensional vector, the result will be still an $$N$$-dimensional vector right? Is this my mistake or a mistake on the page?

Raideluz (discuss • contribs) 13:30, 18 January 2021 (UTC)

 * I believe you are correct @Raideluz - the theorem is for R^n --> R^m but the proof mostly seems to apply to R^n --> R^n. This needs correcting, I'll look at trying to correct it but like you I'm not very confident with Maths! Also there is a superscript 't' in the proof which I don't understand. Matthew.howey (discuss • contribs) 12:05, 15 May 2021 (UTC)


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User:ShayMTR/sandbox/Epistemology/Virtue responsibilism

In response to Sosa's formulation of a virtue epistemology that rested on the virtuous use of reliable faculties, other philosophers began to formulate their own versions. Some thought that although Sosa had been right to bring attention to intellectual virtues, that he was wrong in not conceptualising intellectual virtues as praiseworthy character traits more akin to the virtues of virtue ethics. The contributions of this group of philosophers led to the birth of virtue responsibilism. Although virtue epistemologists had many different motivations for developing this theory, such as to better understand our intellectual responsibilities to others or as a way of guiding intellectual practice, in this chapter we will be focusing on the work of Linda Zagzebski whose project was focused on the use of virtue responsibilism to provide the proper analysis of knowledge. Zagzebski defines knowledge simply: knowledge is "belief arising out of acts of intellectual virtue". However, this simplicity hides a complex theory of intellectual virtues that at once attempts to solve the Gettier problem in a way similar to Sosa, whilst at the same time explaining the acquisition of high-level knowledge such as that acquired by a brilliant scientist or genius detective.

Acts of intellectual virtue
Acts of intellectual virtue have three components.

[add criticisms]
 * 1) When people have virtues such as generosity, compassion, kindness and so on, they are motivated to make the world a certain way. For example, a compassionate person seeing somebody in pain would want to relieve there suffering and so would act to make the person feel better. The first component of a virtuous act then, is that a virtuous act must arise from a certain motivational component of a virtue. In the case of compassion, we have seen that the motivational component is a desire to relieve the suffering in the world. But not only moral virtues motivate us to act in specific ways when faced with a certain situation; intellectual virtues also motivate us. For example, curiosity may motivate us to discover new things or come to deeper understandings of the things we already know, intellectual humility may motivate us to hear out other perspectives before we come to a judgement on a certain question, and intellectual courage may motivate us to propose creative solutions to problems even if they seem outlandish to others.
 * 2) Virtuous motivations are part of what makes an act praiseworthy but it isn't the whole story. Even people who are not virtuously motivated can do the "right" thing and there is a certain sense in which the value of an act can come simply from the fact that it is the right thing to do regardless of motivation. The second component of virtuous acts accounts for this value by requiring that virtuous acts are the type of act that a virtuous person would do given the circumstances.
 * 3) Finally, virtuous acts are not only virtuously motivated and the kind characteristic of virtuous people, they are also successful in meeting the ends of the virtuous motivation because of these features. In the compassionate person case described previously, the motivational component of compassion is the desire to relieve the suffering in the world and the end of this motivational component in the given scenario is to make the hurting person feel better. For acts of intellectual virtues, the truth is the end that must be successfully achieved and it must be achieved due to the first two components. The reason that it must be achieved due to the other two components is so that the truth of the belief must be tied up with the virtuousness of the act to avoid Gettier cases (similarly to Sosa's aptness condition).

Gettier strikes again
A Gettier counterexample to Zagzebski's virtue responsibilism provided by Heather Battally is shown below:

 * Brenda is a detective investigating the murder of an accountant for a big corporation
 * There are 2 suspects: the CEO of the corporation and the accountant’s husband – there is evidence against both of them and they both have a motive
 * Brenda considers the evidence and comes to the conclusion that, although it’s mixed, it points more towards the CEO than the husband
 * Out of intellectual humility, Brenda is motivated to hear out the opinions of her investigative team so that she can feel more certain that she has come to the truth (virtuous motivation)
 * The CEO of the company knows the evidence against him is strong, so he uses his massive amount of money to hire a hypnotist to brainwash the investigative team into believing that the accountant’s husband committed the murder
 * After listening to her investigative team (the kind of act an intellectually humble person would do), Brenda is convinced and forms the belief that the husband is the murderer
 * It turns out that the murderer actually was the accountant’s husband
 * If Brenda hadn't been virtuously motivated and acted as an intellectually humble person would do, she would not have believed that the husband committed the murder
 * Therefore, Brenda is successful in reaching the truth due to the appropriate features of her actions and so according to virtue responsibilism has knowledge
 * BUT we would never really consider this knowledge because the investigative team was brainwashed - Brenda only has knowledge through luck!


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User:Althaf Dainrifqi Adiwidya

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title: User:Althaf Dainrifqi Adiwidya


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User talk:Althaf Dainrifqi Adiwidya

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User:Althaf Dainrifqi Adiwidya/sandbox

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title: User:Althaf Dainrifqi Adiwidya/sandbox


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User:Captain MarcusL

Hello Everyone! My name is Marcus Lu. I started editing in January 2021. I am contributing by editing pages and adding information because I am eager to improve Wikipedia’s articles and other sites. I excel in history, playing the piano, and mathematics. I want to be a dentist when I grow up. Some things about me are that I am a big fan of basketball because I love Michael Jordan and the Chicago Bulls because of the way he led his team to victory which changed the game of basketball. He also changed the NBA and made Nike, Inc famous and became a global icon in the process. I also like the Los Angeles Lakers and the Boston Celtics because of their players. My favourite movie is Avengers: Endgame because of how The Avengers (comics) defeated Thanos. I also think that they are really funny and have a really good theme song. My favourite song is Blinding Lights by Canadian singer The Weeknd. I am from Vancouver, British Columbia. I really look up to my dad because he is the best. Here are some of my stuff I had added!

title: User:Captain MarcusL


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Human Digestive System/Colon

The main function of the colon is to absorb water. The water and other things get absorbed that feces are formed. The feces is stored in the rectum. The internal sphincter then opens. The external sphincter then decide when to open. When it is open, the feces go out the anus. The appendix is a little pouch that stores good bacteria which can squirt it out. It squirts it out to help digest food.

title: Human Digestive System/Colon


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User talk:Gjalm

The book you've created has been deleted as a copyright violation and it was taken from a published work. Wikibooks is for free, open source textbooks, that you write yourself. QuiteUnusual (discuss • contribs) 09:32, 19 January 2021 (UTC)

title: User talk:Gjalm


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Human Digestive System/Biliary tract

The biliary tract (biliary tree or biliary system) functions to make, store, and secrete bile. First the liver makes bile, which travels through the right and left hepatic ducts into the common hepatic duct. Where will it go next? The common bile duct or the cystic duct that can be stored in the gallbladder. Then the bile from the gallbladder will get squeezed out by cholecystokinin. That bile then goes into the common bile duct. The bile from the common bile duct will go into the duodenum. The other bile that went into the common bile duct will go into the duodenum too.

title: Human Digestive System/Biliary tract


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Human Digestive System/Pharynx

The pharynx occurs at the back of the mouth cavity and is the area where the nasal passages and the alimentary tract cross each other. It moves food from the mouth to the esophagus.As the pharynx also serves the respiratory system,it also leads to the trachea by means of an opening called glottis. When food is swallowed the glottis is closed by means of a leaf shaped cartilage called epiglottis.

title: Human Digestive System/Pharynx


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History of wireless telegraphy and broadcasting in Australia/Topical/Biographies/William Trevor Watkins

William Trevor Watkins
Potted biography:

William Trevor Watkins | Watkins, William Trevor "Trevor", "Watty" - 1899(Tas)-1931(Tas) - Licences: T336 Hobart (1920-1921); 7AA Hobart (1922-1925); 7DX Hobart (1925-1931) - Qualifications: AOCP 107, 1925, No. ?? in Tas - amateur operator, amateur broadcaster - PMGD withdrew 7AA callsign for their own use, electrician (Zinc Co., Hobart, 1922), wireless expert (Medhurst & Sons, Hobart, 1925) - Electoral Rolls: electrician (West Hobart, 1922-1928) - passed too soon

A comprehensive biography of William Trevor Watkins has not yet been prepared, however the following resources have been assembled in preparation:

 * Research - William Trevor Watkins - Summary of research to date

 * Transcriptions and Notes - William Trevor Watkins - More than 220 transcriptions

 * Photos, QSL cards and other graphics - William Trevor Watkins - Nothing uploaded as yet, but QSLs for both 7AA and 7DX held

 * Incubator of Wikipedia Article on William Trevor Watkins - Coming real soon now!

Pending further progress on the foregoing, the following obituary in the Hobart Mercury for William Trevor Watkins touches briefly on how much Watty contributed to the development of wireless in Tasmania in the 1920s and how well-loved he was in the amateur radio community "OBITUARY. THE LATE MR. TREVOR WATKINS, AMATEUR WIRELESS EXPERIMENTER. With the passing of Mr. Trevor Watkins, whose death occurred on Tuesday last after a long illness, Tasmania lost her foremost amateur wireless experimenter. He was the first person in this State to broadcast music by wireless, from his private transmitting station in Hobart, and for several years devoted himself to the study of radio and the development of radio ideas, many of which have been adopted by fellow experimenters who were in communication with him here and from other parts of the world. His special branch of study was wireless telegraphy, and as an amateur operator his familiar call sign, '7DX,' was known in every part of the world where radio amateurs are established. Many of the formal acknowledgements of receipt of his transmissions (of which he possessed hundreds) testified to the excellence of his work at the Morse key. It was quite a usual thing for him to have chats almost daily with fellow experimenters in several continents, his opinion on the adjustment of transmitting apparatus being much sought after. In a number of successful tests his work was highly appreciated by the signalling section of the Royal Australian Air Force, his station in Hobart being the section guard station for this State. In 1925, in competition with a large number of others in Australia and New Zealand, he had the honour of winning the trans-Pacific tests for amateur radio operators. During the severe floods in 1929, when departmental telegraph lines were out of action between Hobart and Launceston, his private station was on the air almost continuously for two days and two nights, and for the greater part of the time Mr. Watkins, though a sick man, stuck to his instruments with very short intervals for sleep, receiving and despatching many thousands of words of press news. A most unassuming man, with a very genial disposition, ever ready to pass on his knowledge, to fellow experimenters, 'Watty,' as he was called by radio friends here and in different parts of the world, will be much missed. Telegrams of sympathy from the divisions of wireless institutes on the mainland received by his relatives all bear testimony to his sterling worth. Young men of his type can ill be spared. At the graveside at Cornelian Bay yesterday, where the funeral service was conducted by the Rev. J. W. Barrow, a large gathering of representatives of departmental, commercial, and amateur wireless bodies paid their last respects to the deceased, the pall-bearers being well-known amateur wireless operators."