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لینک دانلود و خرید پایین توضیحات
فرمت فایل word و قابل ویرایش و پرینت
تعداد صفحات: 29
گیتAND
قطعات مورد نیاز برای گیت AND
1 عدد آیسی 74HC08
3 عدد LED
1 عدد خازن 0.01 میکرو فاراد
3 عدد مقاومت 1 کیلواهم
برد بورد
سیم تلفنی نقشه مدار مربوط به گیت AND طبق معمول در ابتدا پایه های مربوط به تغذیه آیسی 74HC08 را بر روی برد بورد ببندید.
در این آیسی پایه 7 تغذیه زمین و پایه 14 تغذیه مثبت است.دو پایه 1و 2 این آیسی را با دو مقاومت 1 کیلواهم همانطور که در نقشه مشخص است به زمین متصل کنید. datasheet مربوط به این آیسی را از اینجا دانلود کنید.برای باز کردن فایل دانلود شده می بایست برنامه acrobat reader را در داخل سیستم داشته باشید. دومرتبه از پایه های 1و2 به یک سر کلید کلنگی یک حالته وصل کنید سر دیگر این کلید را به کاتد یا منفی LED متصل نمایید.سر مثبت یا آند LED ها را به طور مستقیم به مثبت ولتاژ وصل نمایید. در این هنگام هر کلیدی را که می بندید LED مربوط به آن روشن می شود.همانطور که می دانید.زمانی خروجی گیت AND یک یا HIGH می شود.که هر دو ورودی آن یک یا HIGH باشد. در حالت عادی یعنی زمانی که کلید باز باشد.،همانطور که در نقشه می بینید.هر دو ورودی گیت با دو مقاومت 1 کیلو اهم زمین شده است.در واقع ورودی صفر را در حالت عادی در هر دو ورودی خواهیم داشت. در هنگام بسته شدن کلید پایه های ورودی از طریق LED به مثبت ولتاژ وصل می شو ند.و در این حالت هر دو ورودی HIGH می شود.
هما نطور که گفته شد.،اگر کلید متصل به پایه های ورودی 1و2 بسته شود.پایه ورودی 1و2 که در واقع دو ورودی یکی از 4 گیت موجود در این آیسی است.HIGH یا یک می شو د وخروجی این گیت از آیسی که پایه 3 است.، با بستن هر دو کلید ورودی HIGH یا 1 می شود. همانطور که در شکل مربوط به شماتیک داخلی آیسی 74hc08 می بینید.این آیسی دارای 4 گیت AND مجزا است.پایه 7 تغذیه زمین و پایه 14 تغذیه مثبت است. هر گیت AND به همراه دو ورودی و خروجی آن به همراه پایه ها در شکل بالا مشخص شده است.
فرمول مربوط به گیت AND
با توجه به فرمول زیر زمانی این گیت منطقی خروجی یک یا HIGH دارد.؛که هر دو ورودی آن یک باشد.در واقع در ضرب منطقی زمانی خروجی یک می شود که هر دو ورودی یک باشند.در غیر اینصورت خروجی صفر یا LOW است.
گیتOR
قطعات مورد نیاز برای گیت OR
1 عدد آیسی 74HC32
3 عدد مقاومت 1 کیلو اهم
3 عددد LED
2 عدد کلید کلنگی یک حالته
برد بورد
سیم تلفنی
کتاب Brunner and Suddarth's Textbook of Medical-Surgical Nursing زبان اصلی
حجم فایل: 3 مگابایت
The perfect companion to Brunner and Suddarth's Textbook of Medical-Surgical Nursing, this exemplary study tool helps you better understand the concepts, techniques, and disease processes detailed in the textbook.
کتاب Husband and Rezneks Imaging in Oncology زبان اصلی
دو جلد
حجم فایل: 86 مگابایت
In recent years there has been recognition of the central role of imaging in the management of patients with cancer. The third edition of this widely acclaimed book builds on the foundations laid down by the first edition, the 1998 winner of the Royal Society's award for the Multi-author Textbook of the Year, and the second (2004). The core of the book deals with the application of imaging in all tumours. An extensively referenced, evidence-based analysis is given of the role of imaging in planning treatment. Experienced opinion is provided as to the advantages and limitations of all relevant imaging modalities including ultrasound, CT, MRI, PET/CT and other nuclear medicine techniques.
Imaging in the recognition of metastatic disease is covered in detail with chapters detailing the range of appearances of deposits in each organ. Much attention is given to the differential diagnosis of focal pathology in each organ in patients with underlying malignancy and useful protocols for the performance of the study provided.
While including a section on new horizons in cancer imaging, such as the imaging of angiogenesis, MR lymphography and the rapidly evolving field of molecular imaging, the editors have not neglected the more traditional general principles of cancer behaviour and imaging. Hence, an outline of cancer surgery, chemotherapy and radiotherapy is provided by experts. As therapy becomes more successful, increasingly important issues for the radiologist such as the assessment of response, the effect of treatment on normal tissues, the complications of treatment, and the risk of second malignancies are presented.
There are several outstanding features to this book: the colour diagrams of the staging systems are exquisite and allow the often complex systems to be understood easily and memorized; the organization of the book into different, clearly defined sections allow it to be used not only as a reliable reference text, but also to be read easily; key points and summaries in point form are provided throughout for quick revision.
This comprehensive book will not only be essential reading for all radiologists, but also important for all members of a multidisciplinary team looking after patients with cancer
لینک پرداخت و دانلود در "پایین مطلب"
فرمت فایل: word (قابل ویرایش و آماده پرینت)
تعداد صفحات:10
Let me begin by thanking BIHR for asking me to join their very distinguished list of lunchtime lecturers. I am very pleased and honoured to have been invited.
I have chosen to dedicate this lecture to someone who knows a bit about how just the criminal justice system is. She is called Mrs Yvonne Scholes. She is the mother of a boy called Joseph and he is one of two people whose stories I propose to tell you today. I hope you will see why as we progress.
I have long been a supporter of the call for a public inquiry into what happened to Joseph Scholes. I am sure some of you have heard of him.. His story does not take long to tell. He had an unhappy childhood. It is said that he was severely sexually abused as a child by a member of his father’s family. As a teenager he suffered depression and began to do injuries to himself. In November 2001 he tried to kill himself by taking an overdose and jumping to the ground from a window. Ambulance staff came to take him to hospital. He attacked one of them. After the hospital had dealt with him he was charged and convicted for the attack on the ambulance worker. He became more disturbed and was then put into a children’s home to be looked after by the local authority. One night he went out from the children’s home with some other children and participated in stealing three mobile phones from people on the street. He was arrested and charged. Whilst waiting for the trial he slashed his face thirty times with a knife. The walls of his room were so covered with blood they had to be repainted. When the case came to trial on 15 March 2002 the court was told that he had serious mental problems. The judge after lengthy reflection gave him a two-year prison sentence and asked the proper authorities to take note of Joseph’s condition. The Youth Justice Board which allocates convicted children in England were asked to place him in a local authority secure unit with social services. But they did not. They sent him to a youth prison called Stoke Heath.
Because they were worried about him in the prison they put him in a special cell. To protect him they took away all his clothes and left him there naked except for a garment described by his mother as ‘not unlike a horse blanket’. On his ninth day in Stoke Heath prison Joseph, aged 16 years and one month, hanged himself with a sheet from the bars of his