- إنضم
- 26 مارس 2013
- المشاركات
- 5,507
- التفاعل
- الدولة
شغل جبار
بالتوفيق للمملكة
بالتوفيق للمملكة
وزير الاتصالات: صنعنا رقائق ذكية بأيد سعودية
- بادئ الموضوع Medic
- تاريخ البدء
- إنضم
- 18 ديسمبر 2009
- المشاركات
- 1,169
- التفاعل
- الدولة
شيئ ممتاز هذه الرقاقات تستعمل في اغلب الصناعات الالكترونية ، و عليها طلب كبير لدرجة شركات تتوقف ايام كل شهر نظير النقص الكبير في هذه الرقاقات ، شركات على اصابع اليد هي الرائدة في صناعة هذه الرقاقات ، ثلاث اشياء يجب توافرها ستأخد حينها السعودية مكانا في هذه الصناعة (الجودة ، التكلفة ، التقنية المستعملة )
- إنضم
- 14 فبراير 2012
- المشاركات
- 12,126
- التفاعل
- الدولة
شاهدت تقرير يذكر ان بعض السيارات
الواحده فيها من ٥٠ الى ١٥٠ رقاقة
هذا فقط في السياره الواحده وعليك الحسبه
كم تنتج سياره في العام الواحد
غير باقي القطاعات والصناعات اللتي تدخل الرقاقات في جزء من صناعتها
- إنضم
- 29 يوليو 2020
- المشاركات
- 2,117
- التفاعل
- الدولة
طيب هل نقدر نسوي مواقع مستقلة للوطن العربي مثل تويتر واتساب جوجل يوتيوب الخ الخ الخ
لكي نستقل عن الغرب؟
لكي نستقل عن الغرب؟
- إنضم
- 20 أغسطس 2021
- المشاركات
- 1,632
- التفاعل
- الدولة
بس مشكلته انه يخترق الخصوصية. يتطلب تتبع مستمر للفرد
- إنضم
- 24 أغسطس 2021
- المشاركات
- 224
- التفاعل
- الدولة
ترا الاستقلال مو زين اوقات
الموضوع تكاملي
وبعد ازمه كورونا
الكل صار يفكر ان الاعتماد على الدول بشكل كامل غلط
وصارت امن وطني حتى لو التكلفه زادت
السعوديه تمتلك ارصده بالتريليون
ومحمد بن سلمان ميزته انه يعرف كيف يستثمر
منافسه تايوان بكره مستحيله
منافسه تايوان بعد 20 سنه ممكنه
واشباه الموصلات يعتبر نفط جديد حاليا
كل الاجهزه تعتمد عليه
الاستثمار بهذا الطريق ممكن جدا بالسعوديه
يوجد اموال ... يوجد مبتعثيين بالهبل
السعوديه من ضمن الدول الحليفه للغرب
كانت المشكله سياسيه ان الحكومه فقط معتمده على النفط
الان انتهت وصارت تتجهه لاي شي كباقي دول العالم المتقدم
- إنضم
- 5 مارس 2019
- المشاركات
- 1,705
- التفاعل
- الدولة
موجود محركات بحث عربية على أرض الواقع
موجود مواقع عربية مشابهة ل تويتر و فيسبوك و واتس اب
موجود مواقع عربية ل استضافة مقاطع الفيديو و الأفلام مثل اليوتيوب
الغير الموجود هو دعم هذه المشاريع والبرامج و بالإضافة إلى تغيير و تحسين الجودة والاعتماد على أنظمة تشغيل عربية و أيضا تغيير صورة المشاريع والبرامج في الإعلام العربي و العالمي و أكبر مثاليين على ذلك موقع صراحة السعودي و موقع توتوك الإماراتي
- إنضم
- 5 مارس 2019
- المشاركات
- 1,705
- التفاعل
- الدولة
لا يوجد شيء اسمه مستحيل أمام البشر بشكل عام و بشكل خاص أمام الشعب السعودي
- إنضم
- 19 أبريل 2018
- المشاركات
- 4,054
- التفاعل
- الدولة
هي باقي الدول بتصنعها برجليها ولا ايه
- إنضم
- 23 مارس 2017
- المشاركات
- 1,673
- التفاعل
- الدولة
خله يتابعني وين بروح عاد
لكن اللي جرب مراجعتنا قديما للاحوال والجوازات وتبليغ ولادة وجرب الان يعرف انه فرق السماء عن الارض
والله انتهت معاناتنا بضغطة زر
بس ناقصهم تغيير الاسم لو يحطونه ياسلااام
هل من الممكن أن توضح لنا ما نوع الرقائق التي يتكلم عنها السواحة؟ اكثر ٦٠ الف ضعف من رحلة القمر يعني انها بمواصفات رديئة. في ذلك الوقت لم يكن هناك كمبيوتر ولا رقائق بل كانت ايام ترانزستر.محمد السويد حمار ما يفهم كعادته سبحان الله.
المقصود ليس رقاقة سيليكون عادية او بمواصفات وبنية تخص منتج اجنبي بل سعودية البناء من الصفر يعني من الground zero.
لكن انصحك تراجع نفسك بخصوص الحمار اللي اسمه محمد السويد. ايضا نصيحة لا تثق بأي شخص صورته مثل صورة بروفايل محمد السويد. يبي يعطيك انطباع انه فاهم وبحركة صوروني وانا مدري يعنني لقطة عارضة له وهو يتكلم
الخلاصة لا نريد تصريحات مثل تصريحات المياه الجوفية سابقا.
- إنضم
- 26 فبراير 2012
- المشاركات
- 49,436
- التفاعل
- الدولة
من جدكتويتر واتساب ويوتيوب تطبيقات من 15 الى 30 يوم تسوي لك واحد اي شركه لكن اعلان عنه وتكلفة جذب الناس له مسؤوليتك هذي كل الحكايه اعلى تكلفه 30 الف ريال لهكذا تطبيقات كتاسيس كامل والتشغيل السنوي ل100 الف مشترك تبدء من 100 ريال شهريا (قيمة سيرفرات الاستضافه) ماهو صعب
الصعوبه كلها تاتي في بناء نظام مثل مافعلت هواوي حتى تنزل فيه التطبيقات حقك دون قدرت ابل (iOS) او سامسونج (اندرويد) على حظرها كما فعلو معا اجهزة الصين مما جعل الصين تقوم ببناء نظامها الخاص وهو يعمل حاليا
لا برجليها ولا بيديها ... متصنعهاش خالص
- إنضم
- 5 أكتوبر 2011
- المشاركات
- 5,119
- التفاعل
بحوث مدينة الملك عبدالعزيز العلوم وتقنية في مجال ELECTRONIC DEVICES, CIRCUITS AND SYSTEMS
MONOLITHIC SENSOR FUSION
MONOLITHIC SENSOR FUSION
Monolithic CMOS MicroSystems for Structural , Chemical and Bio Hazard Detection (Completed)
This project focuses on structural-, chemical- and bio-hazard detection/prediction using a smart fusion of micro-sensor-systems, monolithically integrated inside a CMOS microchip, suitable as an autonomous sensing-node of a wireless-sensor-network (WSN). The proposed sensor-fusion includes MEMS accelerometers, IR absorption based MEMS chemical sensors, Microcantilever based Bio-MEMS sensors and Microbolometer based low-cost IR imagers along with their configurable readout Microelectronics. The main aim is to utilize the upcoming trend of FAB-supported monolithic Microsystems manufacturing, i.e. micro-sensors and micro-electronics inside the same CMOS die without or minimal post-processing of the manufactured silicon. This monolithic integration enables the realization of a low-cost, low-power, compact, robust and high performance system, which is batch-producible in millions. The proposed Microsystem design is not only limited to designing micro-sensors inside a CMOS process but the design of their electronic readout interfaces (ROI) is also an essential part. The applications of such a miniaturized multi-sensor system would include WSN scenarios; employed for the monitoring of structures, ambience and environment. The multi-sensor perspective helps to develop a context aware understanding of the scenario, which is a fundamentally useful aspect for the upcoming trends such as Internet-of-Things. For that reason, the correlation of the Microsystems’ specifications with the existing/emerging application paradigms necessitates for low-power profile, small foot-print, high transduction sensitivities and low production costs. A monolithically integrated system can better address these multifaceted specifications together by optimally exploiting the design-space instead of a discrete-component based sensor-system depending on generic off-the-shelf components. The project is currently under design phase and will be taped-out in fall-2019 and tested in the upcoming year of 2020
A PVT tolerant Current Reference Generator
A current reference circuit is an essential part of every autonomous IO limited integrated circuit. The mostly used approach to generate a stable current is to employ an external (off-chip) precision resistor with tolerance in ppm and produce a fixed voltage across this resistor through internal (on-chip) circuitry. Off-chip resistor is necessitated by the fact that on-chip resistors suffer from relatively large (20-30%) tolerances and therefore are not suitable for generating a stable reference current using this simple technique. In certain IO-limited applications, current variations in a simplistic on-chip current reference circuit due to PVT variations cause specification violation and in worst case outright functional failure. Therefore, it necessitates for a PVT tolerant compensated precision current reference to be designed for application specific integrated circuits.
HIGH SPEED SIGNALING OVER ELECTRICAL INTERCONNECT
A Reconfigurable 2Gbps LVDS Transceiver 150nm/110nm CMOS
A Reconfigurable 2Gbps LVDS Transceiver 150nm/110nm CMOS
This project is based the design of Low-Voltage Differential-Signaling IOs (LVDS) in 150nm and 110nm CMOS processes for Flat-Panel Display operating at 2Gbps data-rate. LVDS signaling is now extensively used in Physical layers of numerous electronic components signaling over a longer physical medium to save power at higher data-rates. A 2Gbps LVDS transceiver in 150nm CMOS process was designed. The transceiver has embedded configurable pre-emphasis, slew-rate control and equalization. The pre-emphasis has been demonstrated to improve eye-opening at 2Gbps for longer channels of 10m while slew-rate control demonstrated improvement in eye-opening at 2Gbps for shorter channels in the presence of impedance discontinuities in the channel.The transceiver has integrated voltage and current biases, which reduce current variation of the transmitter to ±3% across the PVT corners (measured on 5 samples). Total power consumption of 16mW at 2Gbps with an improved FoM of 6.4pJ/bit was measured.
DATA CONVERTER
This activity involves fusion of different types of data-converters architecture to take advantage of scattered yet effective architectural features. One of the main focus of this activity is on Successive Approximation ADC design while combining sub-ranging, interleaving and noise-shaping to achieve data-rates above Gbps with a resolution above 10bits and pJ/conversion FoM.
- إنضم
- 5 أكتوبر 2011
- المشاركات
- 5,119
- التفاعل
A deep insight into perovskite solar cells
Researchers examine which components influence the performance and stability of these promising materials.
Cheap, flexible, and efficient, perovskite solar cells are the rising star in the field of photovoltaics. However, their low durability has kept them from the consumer market.
But now, KACST researchers, in collaboration with École Polytechnique Fédérale de Lausanne, Switzerland, have unravelled some fundamental electronic processes, which could be useful to improve the performance of these light-harvesting devices.
The researchers tested and compared two types of perovskites. The perovskites general formula is ABX3, where A is a larger cation (positively charged ion), B a smaller metallic cation, and X a halide anion (a halogen atom that is negatively charged). The team used a frame of lead bromide with either formamidinium (FA) or caesium (Cs) as A-site cations, creating FAPbBr3 and CsPbBr3, respectively.
“Stability is still an issue in perovskite solar cells, particularly in humid and hot conditions. We used a frame of lead bromide, because it has higher stability compared to others, such as lead iodide. Then, we thought that optimizing the A cation could further improve the efficiency of these devices,” says Mohammad Hayal Alotaibi, assistant professor at the Materials Science Research Institute, and a member of the team. “The size of A cations can play an important role. For example, if they do not fit properly in their positions, they may cause poor functioning.”
Compared to the cell made with caesium (CsPbBr3), the cell made with formamidinium (FAPbBr3) has more favourable photocurrent, photovoltage, and fill factor: three photovoltaic parameters that determine the power conversion efficiency of a solar cell.
Perovskite solar cells were built in layers, starting with fluorine doped tin oxide glass, followed by titanium dioxide (TiO2), perovskite, then spiro-OMeTAD as hole transport material (HTM) and finally gold. Photons of the sunlight are absorbed by the perovskite film, where they excite some electrons and cause them to migrate to the TiO2 layer. A hole is created where each electron was formerly bound. This hole also participates in conduction by moving to the HTM. The scientists used various techniques to measure how free electrons roam within the device, to generate current, and end their journey by recombining with the holes.
Several analyses confirmed that electrons in devices made with formamidinium can move quicker across the TiO2-perovskite interface, than in those made with caesium. The devices of caesium are more subject to power loss as they have higher internal resistances for charge transport, and lower shunt resistance, which provides an alternate current path for the light-generated current. Caesium cells are also limited by mechanisms that facilitate a quicker recombination between electrons and holes.
The team is planning to introduce other A cations of various sizes, as well as different anions.
But now, KACST researchers, in collaboration with École Polytechnique Fédérale de Lausanne, Switzerland, have unravelled some fundamental electronic processes, which could be useful to improve the performance of these light-harvesting devices.
The researchers tested and compared two types of perovskites. The perovskites general formula is ABX3, where A is a larger cation (positively charged ion), B a smaller metallic cation, and X a halide anion (a halogen atom that is negatively charged). The team used a frame of lead bromide with either formamidinium (FA) or caesium (Cs) as A-site cations, creating FAPbBr3 and CsPbBr3, respectively.
“Stability is still an issue in perovskite solar cells, particularly in humid and hot conditions. We used a frame of lead bromide, because it has higher stability compared to others, such as lead iodide. Then, we thought that optimizing the A cation could further improve the efficiency of these devices,” says Mohammad Hayal Alotaibi, assistant professor at the Materials Science Research Institute, and a member of the team. “The size of A cations can play an important role. For example, if they do not fit properly in their positions, they may cause poor functioning.”
Compared to the cell made with caesium (CsPbBr3), the cell made with formamidinium (FAPbBr3) has more favourable photocurrent, photovoltage, and fill factor: three photovoltaic parameters that determine the power conversion efficiency of a solar cell.
Perovskite solar cells were built in layers, starting with fluorine doped tin oxide glass, followed by titanium dioxide (TiO2), perovskite, then spiro-OMeTAD as hole transport material (HTM) and finally gold. Photons of the sunlight are absorbed by the perovskite film, where they excite some electrons and cause them to migrate to the TiO2 layer. A hole is created where each electron was formerly bound. This hole also participates in conduction by moving to the HTM. The scientists used various techniques to measure how free electrons roam within the device, to generate current, and end their journey by recombining with the holes.
Several analyses confirmed that electrons in devices made with formamidinium can move quicker across the TiO2-perovskite interface, than in those made with caesium. The devices of caesium are more subject to power loss as they have higher internal resistances for charge transport, and lower shunt resistance, which provides an alternate current path for the light-generated current. Caesium cells are also limited by mechanisms that facilitate a quicker recombination between electrons and holes.
The team is planning to introduce other A cations of various sizes, as well as different anions.
لا اعلم ما دخل هذا المحتوى بكلام الوزير. ما اقتبسته يتكلم عن مشاريع بحثية تقوم بها المدينة مع باحثين خارجين لتصميم شرائح إلكترونية. كلام الوزير يتكلم عن إنتاج شريحة الكثرونية بمواصفات عالمية.
A deep insight into perovskite solar cellsResearchers examine which components influence the performance and stability of these promising materials.
Cheap, flexible, and efficient, perovskite solar cells are the rising star in the field of photovoltaics. However, their low durability has kept them from the consumer market.
But now, KACST researchers, in collaboration with École Polytechnique Fédérale de Lausanne, Switzerland, have unravelled some fundamental electronic processes, which could be useful to improve the performance of these light-harvesting devices.
The researchers tested and compared two types of perovskites. The perovskites general formula is ABX3, where A is a larger cation (positively charged ion), B a smaller metallic cation, and X a halide anion (a halogen atom that is negatively charged). The team used a frame of lead bromide with either formamidinium (FA) or caesium (Cs) as A-site cations, creating FAPbBr3 and CsPbBr3, respectively.
“Stability is still an issue in perovskite solar cells, particularly in humid and hot conditions. We used a frame of lead bromide, because it has higher stability compared to others, such as lead iodide. Then, we thought that optimizing the A cation could further improve the efficiency of these devices,” says Mohammad Hayal Alotaibi, assistant professor at the Materials Science Research Institute, and a member of the team. “The size of A cations can play an important role. For example, if they do not fit properly in their positions, they may cause poor functioning.”
Compared to the cell made with caesium (CsPbBr3), the cell made with formamidinium (FAPbBr3) has more favourable photocurrent, photovoltage, and fill factor: three photovoltaic parameters that determine the power conversion efficiency of a solar cell.
Perovskite solar cells were built in layers, starting with fluorine doped tin oxide glass, followed by titanium dioxide (TiO2), perovskite, then spiro-OMeTAD as hole transport material (HTM) and finally gold. Photons of the sunlight are absorbed by the perovskite film, where they excite some electrons and cause them to migrate to the TiO2 layer. A hole is created where each electron was formerly bound. This hole also participates in conduction by moving to the HTM. The scientists used various techniques to measure how free electrons roam within the device, to generate current, and end their journey by recombining with the holes.
Several analyses confirmed that electrons in devices made with formamidinium can move quicker across the TiO2-perovskite interface, than in those made with caesium. The devices of caesium are more subject to power loss as they have higher internal resistances for charge transport, and lower shunt resistance, which provides an alternate current path for the light-generated current. Caesium cells are also limited by mechanisms that facilitate a quicker recombination between electrons and holes.
The team is planning to introduce other A cations of various sizes, as well as different anions.
في موضوع |
|---|
الرياضيات في خدمة السلاح النوويالذي يسلط الضوء على إسهامات علماء الرياضيات وابتكارهم لمعادلات رياضية، ذكر ما يلي:
شكل الحاسبة فيليكس
المواضيع المشابهة
