Forwarded from Dev
Acidizing Oil Wells: Acids Used and Applications
Acidizing is one of the important methods for enhancing the productivity of oil and gas wells. This process involves injecting specific acids into the formation, which increases permeability and facilitates the flow of reservoir fluids to the well.
Acids Used in Acidizing Operations:
1. Hydrochloric Acid (HCl):
Used to dissolve calcium carbonate and increase permeability in carbonate formations.
2. Hydrofluoric Acid (HF):
Employed to dissolve silicates and sandstone deposits.
3. Mud Acid (a mixture of Hydrochloric and Hydrofluoric Acids):
A powerful combination for cleaning drilling mud and mineral deposits.
4. Organic Acids:
Such as formic acid and acetic acid, which are used in high-temperature conditions and in sensitive formations.
Applications of Acidizing in Oil Wells:
1. Formation Cleanup:
Removing mineral deposits and drilling mud that have accumulated in the formation.
2. Increasing Permeability:
Unblocking obstructed pathways and improving the flow of reservoir fluids to the well.
3. Stimulating Low-Production Wells:
Enhancing production in wells that are underperforming due to various reasons, such as reduced reservoir pressure.
4. Addressing Drilling Damage:
Eliminating damage incurred during drilling or cementing operations on the wellbore.
@My_Ayhan
Acidizing is one of the important methods for enhancing the productivity of oil and gas wells. This process involves injecting specific acids into the formation, which increases permeability and facilitates the flow of reservoir fluids to the well.
Acids Used in Acidizing Operations:
1. Hydrochloric Acid (HCl):
Used to dissolve calcium carbonate and increase permeability in carbonate formations.
2. Hydrofluoric Acid (HF):
Employed to dissolve silicates and sandstone deposits.
3. Mud Acid (a mixture of Hydrochloric and Hydrofluoric Acids):
A powerful combination for cleaning drilling mud and mineral deposits.
4. Organic Acids:
Such as formic acid and acetic acid, which are used in high-temperature conditions and in sensitive formations.
Applications of Acidizing in Oil Wells:
1. Formation Cleanup:
Removing mineral deposits and drilling mud that have accumulated in the formation.
2. Increasing Permeability:
Unblocking obstructed pathways and improving the flow of reservoir fluids to the well.
3. Stimulating Low-Production Wells:
Enhancing production in wells that are underperforming due to various reasons, such as reduced reservoir pressure.
4. Addressing Drilling Damage:
Eliminating damage incurred during drilling or cementing operations on the wellbore.
@My_Ayhan
Forwarded from Linuxor ?
به جزئی از سیستم که همه اجزا به اون وابسته ان و در صورت خرابی، کل سیستم از بین میره، SPOF یا نقطه شکست میگن
جالب اینجاست پیدا کردن SPOF توی یه سیستم کار ساده ای نیست و ممکنه آشکار نباشه که با ریداندنسی و بالانسینگ بین اجزا میشه SPOF رو کاهش داد
مثلا سیستم های ارزی و بانکی تعداد زیادی سرور دارن که به صورت تکراری داده هارو توش بکاپ میگیرن و حتی نیازه که سرور های بکاپ هم تراکنش هارو commit کنن تا حتی یک ثانیه سرور اصلی قطع شه هیچ تراکنشی بلاتکلیف نشه
🐧 @Linuxor
جالب اینجاست پیدا کردن SPOF توی یه سیستم کار ساده ای نیست و ممکنه آشکار نباشه که با ریداندنسی و بالانسینگ بین اجزا میشه SPOF رو کاهش داد
مثلا سیستم های ارزی و بانکی تعداد زیادی سرور دارن که به صورت تکراری داده هارو توش بکاپ میگیرن و حتی نیازه که سرور های بکاپ هم تراکنش هارو commit کنن تا حتی یک ثانیه سرور اصلی قطع شه هیچ تراکنشی بلاتکلیف نشه
🐧 @Linuxor
Forwarded from محتوای آزاد سهراب
امروز بیشتر وقتم رو صرف بهبود فروم پارچ کردم.
https://forum.parchlinux.com
قالبش رو عوض کردم و چندتا پلاگین جدید نصب کردم.
پ.ن: خودم میدونم روی موبایل مشکل داره.
همینطور برای بتای آپادانا توی فروم میتونید درخواست بدید.
https://forum.parchlinux.com/t/topic/235
خارج از فروم هیچ درخواستی رو قبول نمیکنم.
@SohrabContents
https://forum.parchlinux.com
قالبش رو عوض کردم و چندتا پلاگین جدید نصب کردم.
پ.ن: خودم میدونم روی موبایل مشکل داره.
همینطور برای بتای آپادانا توی فروم میتونید درخواست بدید.
https://forum.parchlinux.com/t/topic/235
خارج از فروم هیچ درخواستی رو قبول نمیکنم.
@SohrabContents
Parch Linux
Parch Linux is a free and opensource linux distribution based on Arch.
Forwarded from Programming (Mohammad)
پست گذاشتن که هیچی حوصله جواب دادن به پیام رفیقامم ندارم
Forwarded from Programming (Mohammad)
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Forwarded from Programming (Mohammad)
بعد فکر کن یک ساله توسط این اقا که هنوزم اینجا ادمینه بلاکم:
@emargie
@emargie
Forwarded from Dev
Scatter Correction in SPECT Images
SPECT imaging (Single Photon Emission Computed Tomography) is an advanced method in nuclear medicine imaging used to assess organ function and diagnose diseases. However, to enhance the accuracy and quality of images, various optimizations and corrections are necessary. Below are the most important types of corrections in SPECT imaging:
1. Attenuation Correction
When photons emitted from injected radionuclides pass through different tissues in the patient's body, their energy is reduced or absorbed. This results in errors in image reconstruction. To address this issue, methods such as using attenuation maps are employed. These maps are typically created with the help of CT or estimation techniques.
2. Scatter Correction
Photon scattering while passing through body tissues is another challenge in SPECT that reduces image contrast. To correct this effect, methods such as energy windowing, mathematical algorithms, and Monte Carlo-based models are utilized.
3. Motion Correction
Patient movement, such as breathing or voluntary movements, can blur SPECT images. To prevent this issue, techniques like motion tracking and adaptive reconstruction algorithms are used.
4. Resolution Correction
SPECT systems often have limitations in spatial resolution. To mitigate the effects of these limitations, corrections such as Point Spread Function (PSF) are applied. This technique improves image quality by modeling how photons spread in the detector.
5. Partial Volume Effect Correction
In small areas with high activity, such as small lesions or thin tissues, partial volume errors can reduce quantitative accuracy. Correction algorithms for this effect are designed based on simulating tissue volume and boundaries.
6. Calibration Correction
Ensuring proper calibration of the imaging system is essential for the accuracy of quantitative results. This includes energy calibration, detector sensitivity, and equipment stability.
Importance of Corrections in SPECT Imaging
These corrections not only ensure improved image quality but also enhance the accuracy of disease diagnoses. By employing appropriate corrective methods, SPECT images can display more detailed information about physiological and pathological processes, which is vital for diagnosis, monitoring, and treatment planning.
In the realm of theoretical physics, black holes have always been a challenging and mysterious topic. These celestial objects possess an infinitely strong gravitational pull capable of attracting anything that comes close to them, even light. One fundamental issue that has captured scientists' attention is the question of information in black holes. In this context, a long-standing dispute occurred between two of the world's leading physicists, Stephen Hawking and Leonard Susskind, known as the "black hole wars." This disagreement, which lasted for several decades, raised important questions about the nature of black holes and the fundamental laws of physics.
SPECT imaging (Single Photon Emission Computed Tomography) is an advanced method in nuclear medicine imaging used to assess organ function and diagnose diseases. However, to enhance the accuracy and quality of images, various optimizations and corrections are necessary. Below are the most important types of corrections in SPECT imaging:
1. Attenuation Correction
When photons emitted from injected radionuclides pass through different tissues in the patient's body, their energy is reduced or absorbed. This results in errors in image reconstruction. To address this issue, methods such as using attenuation maps are employed. These maps are typically created with the help of CT or estimation techniques.
2. Scatter Correction
Photon scattering while passing through body tissues is another challenge in SPECT that reduces image contrast. To correct this effect, methods such as energy windowing, mathematical algorithms, and Monte Carlo-based models are utilized.
3. Motion Correction
Patient movement, such as breathing or voluntary movements, can blur SPECT images. To prevent this issue, techniques like motion tracking and adaptive reconstruction algorithms are used.
4. Resolution Correction
SPECT systems often have limitations in spatial resolution. To mitigate the effects of these limitations, corrections such as Point Spread Function (PSF) are applied. This technique improves image quality by modeling how photons spread in the detector.
5. Partial Volume Effect Correction
In small areas with high activity, such as small lesions or thin tissues, partial volume errors can reduce quantitative accuracy. Correction algorithms for this effect are designed based on simulating tissue volume and boundaries.
6. Calibration Correction
Ensuring proper calibration of the imaging system is essential for the accuracy of quantitative results. This includes energy calibration, detector sensitivity, and equipment stability.
Importance of Corrections in SPECT Imaging
These corrections not only ensure improved image quality but also enhance the accuracy of disease diagnoses. By employing appropriate corrective methods, SPECT images can display more detailed information about physiological and pathological processes, which is vital for diagnosis, monitoring, and treatment planning.
In the realm of theoretical physics, black holes have always been a challenging and mysterious topic. These celestial objects possess an infinitely strong gravitational pull capable of attracting anything that comes close to them, even light. One fundamental issue that has captured scientists' attention is the question of information in black holes. In this context, a long-standing dispute occurred between two of the world's leading physicists, Stephen Hawking and Leonard Susskind, known as the "black hole wars." This disagreement, which lasted for several decades, raised important questions about the nature of black holes and the fundamental laws of physics.
Forwarded from Ninja Learn | نینجا لرن
دوستان پست فردا درمورد AWS هستش 😁
اگه استقبال بشه درمورد سرویس هاش بیشتر و دقیق تر توضیح میدم
اگه استقبال بشه درمورد سرویس هاش بیشتر و دقیق تر توضیح میدم
Forwarded from Ninja Learn | نینجا لرن
و اینکه لطفا از پستا حمایت کنید دوستان 🥲
ما داریم اینجا زحمت میکشیم 😫
ما داریم اینجا زحمت میکشیم 😫
Forwarded from 🎄 یک برنامه نویس تنبل (The Lazy 🌱 Raymond)
🔶 بنابر گزارش تامز هاردور، هستهی لینوکس ۶/۱۱ با بهروزرسانیهای خود، گامی مهم در جهت بهبود پشتیبانی از کارتهای حافظهی SD برداشته است. این بهروزرسانی بهویژه روی کارتهای حافظهی SD با ظرفیت زیاد و سرعت انتقال داده سریع مانند SDUC و UHS-II تمرکز دارد.
یکی از ویژگیهای مهم هستهی لینوکس ۶/۱۱، پشتیبانی کامل از کارتهای حافظهی SDUC است. این کارتها با ظرفیت تئوری ۱۲۸ ترابایت، امکان ذخیره حجم عظیمی از دادهها را فراهم میکنند. با توجه به اینکه درحالحاضر کارتهای حافظهی SDUC با ظرفیت ۸ ترابایت در بازار موجود هستند، میتوان انتظار داشت که در آیندهی نزدیک شاهد تولید کارتهای حافظه با ظرفیتهای بیشتر نیز باشیم.
</Zoomit>
#خبر
@TheRaymondDev
یکی از ویژگیهای مهم هستهی لینوکس ۶/۱۱، پشتیبانی کامل از کارتهای حافظهی SDUC است. این کارتها با ظرفیت تئوری ۱۲۸ ترابایت، امکان ذخیره حجم عظیمی از دادهها را فراهم میکنند. با توجه به اینکه درحالحاضر کارتهای حافظهی SDUC با ظرفیت ۸ ترابایت در بازار موجود هستند، میتوان انتظار داشت که در آیندهی نزدیک شاهد تولید کارتهای حافظه با ظرفیتهای بیشتر نیز باشیم.
</Zoomit>
#خبر
@TheRaymondDev
Tom's Hardware
Linux update adds support for 128 terabyte SD cards— SDUC and UHS-II SD cards are now supported
High-capacity and high-speed SD and microSD cards will receive improved Linux support on the latest 6.11 kernel update.
Forwarded from ⚝ (Amir Hossein "Amiria" Maher)
Forwarded from BAFO | پیشنهاد آخر
arXiv.org
Why is it so hard to find a job now? Enter Ghost Jobs
This study investigates the emerging phenomenon of "ghost hiring" or "ghost jobs", where employers advertise job openings without intending to fill them. Using a novel dataset from Glassdoor and...
arxiv.org/abs/2410.21771
news.ycombinator.com/item?id=42136469
چرا پیدا کردن شغل جدید، سخت شده؟ اصطلاح "Ghost Jobs" به نوعی از آگهیهای شغلی میپردازد که در آن، کارفرما قصد استخدام ندارد. در این مقاله و همچنین مطلب پایین، به این موضوع پرداخته شده است.
در حین پیدا کردن شغل جدید، به این مورد نیز، توجّه ویژهای داشته باشید.
#amiria
@BAFO_channel
news.ycombinator.com/item?id=42136469
چرا پیدا کردن شغل جدید، سخت شده؟ اصطلاح "Ghost Jobs" به نوعی از آگهیهای شغلی میپردازد که در آن، کارفرما قصد استخدام ندارد. در این مقاله و همچنین مطلب پایین، به این موضوع پرداخته شده است.
در حین پیدا کردن شغل جدید، به این مورد نیز، توجّه ویژهای داشته باشید.
#amiria
@BAFO_channel
Forwarded from ⚝ (Amir Hossein "Amiria" Maher)
دَعِ الرَسمَ الَّذي دَثَرا
يُقاسي الريحَ وَالمَطَرا
وَكُن رَجُلاً أَضاعَ العِل
مَ في اللَذّاتِ وَالخَطَرا
— أبونواس
#poem #quote
@amiria703_channel