High-K Bubble Defect Researches in Stack-BSI Process Product

2021 ◽  
Author(s):  
Zhuo Yin ◽  
Jianjun Li ◽  
Xiaoping Li ◽  
Na Zhu ◽  
Lifeng Liu ◽  
...  
Keyword(s):  
High K ◽  
Process Product

Electron Probe Analysis of Vertebrate Smooth Muscle: Distribution of Ca and Ci

1976 ◽  
Vol 34 ◽  
pp. 334-335 ◽  
Author(s):  
Avril V. Somlyo ◽  
H. Shuman ◽  
A.P. Somlyo
Keyword(s):  
Smooth Muscle ◽  
Electron Probe ◽  
Preliminary Report ◽  
Cell Damage ◽  
Electron Probe Analysis ◽  
Perinuclear Space ◽  
Probe Analysis ◽  
High K ◽  
Low K ◽  
Initial Results

This is a preliminary report of electron probe analysis of rabbit portal-anterior mesenteric vein (PAMV) smooth muscle cryosectioned without fixation or cryoprotection. The instrumentation and method of electron probe quantitation used (1) and our initial results with cardiac (2) and skeletal (3) muscle have been presented elsewhere.In preparations depolarized with high K (K2SO4) solution, significant calcium peaks were detected over the sarcoplasmic reticulum (Fig 1 and 2) and the continuous perinuclear space. In some of the fibers there were also significant (up to 200 mM/kg dry wt) calcium peaks over the mitochondria. However, in smooth muscle that was not depolarized, high mitochondrial Ca was found in fibers that also contained elevated Na and low K (Fig 3). Therefore, the possibility that these Ca-loaded mitochondria are indicative of cell damage remains to be ruled out.

Hair cell changes after cationic stimulation of corti's organ

1989 ◽  
Vol 47 ◽  
pp. 798-799
Author(s):  
Cesar D. Fermin ◽  
Hans-Peter Zenner
Keyword(s):  
Organ Of Corti ◽  
Cross Sectional ◽  
Surface Areas ◽  
High K ◽  
Anatomical Arrangement ◽  
Cell Cytosol ◽  
High Concentrations ◽  
K Concentration ◽  
Cell Changes

Contraction of outer and inner hair cells (OHC&IHC) in the Organ of Corti (OC) of the inner ear is necessary for sound transduction. Getting at HC in vivo preparations is difficult. Thus, isolated HCs have been used to study OHC properties. Even though viability has been shown in isolated (iOHC) preparations by good responses to current and cationic stimulation, the contribution of adjoining cells can not be explained with iOHC preparations. This study was undertaken to examine changes in the OHC after expossure of the OHC to high concentrations of potassium (K) and sodium (Na), by carefully immersing the OC in either artifical endolymph or perilymph. After K and Na exposure, OCs were fixed with 3% glutaraldehyde, post-fixed in osmium, separated into base, middle and apex and embedded in Araldite™. One μm thick sections were prepared for analysis with the light and E.M. Cross sectional areas were measured with Bioquant™ software.Potassium and sodium both cause isolated guinea pig OHC to contract. In vivo high K concentration may cause uncontrolled and sustained contractions that could contribute to Meniere's disease. The behavior of OHC in the vivo setting might be very different from that of iOHC. We show here changes of the cell cytosol and cisterns caused by K and Na to OHC in situs. The table below shows results from cross sectional area measurements of OHC from OC that were exposed to either K or Na. As one would expect, from the anatomical arrangement of the OC, OHC#l that are supported by rigid tissue would probably be displaced (move) less than those OHC located away from the pillar. Surprisingly, cells in the middle turn of the cochlea changed their surface areas more than those at either end of the cochlea. Moreover, changes in surface area do not seem to differ between K and Na treated OCs.

EVALUASI PROGRAM PEMODELAN DAN SIMULASI LABORATORIUM KIMIA PADA MAHASISWA CALON GURU

EDUSAINS ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 201-211
Author(s):  
Yenni Kurniawati ◽  
Yuni Fatisa
Keyword(s):  
Mixed Method ◽  
Random Sampling ◽  
Sample Selection ◽  
Product Evaluation ◽  
Thinking Skills ◽  
Laboratory Simulation ◽  
Input Process ◽  
Improvement Program ◽  
Chemistry Students ◽  
Process Product

Abstract Modeling and laboratory simulation can help overcome of cost obstacle, time, safety and other constraints in laboratory experiments. Many skills also had the opportunity to be fostered and promoted, especially in connection with the construction of thinking skills. However, the implementation of this program required an evaluation, in order to decided whether the program will be continuing or not, in addition its needed to found the focused of on overall quality of learning in order to make a recommendation in the decision making. This research was conducted by the mixed-method approached with triangulation design, in order to evaluate the effectiveness, problems or any obstacles of the implementation of the program. The population in this study was the third semester of pre-service chemistry students at UIN Syarif Kasim Sultan Riau, which was supported by lecturers, assistant laboratory and staf. The sample selection was done using random sampling techniques. Program evaluation in this study was conducted by the CIPP model (Context, Input, Process, Product). The results showed that the program was running quite effective when viewed from the overall average grades. The evaluation about context, inputs, processes and products had the good and very good score, in which the evaluation score of context and input, get the better score than process and product evaluation. This study recommends to be a continuing improvement program of modeling and simulation laboratories, both as an exercise before the experiments or replace the real experiments. Keywords: modeling; simulation lab; chemistry experiment Abstrak Pemodelan dan simulasi laboratorium dapat membantu mengatasi kendala biaya, waktu, alasan keselamatan dan kendala lainnya dalam praktikum di laboratorium kimia. Beragam kemampuan lain juga berkesempatan untuk ditumbuh-kembangkan terutama dalam kaitannya dengan konstruksi berfikir. Meskipun demikian, implementasi pelaksanaan program ini memerlukan evaluasi, guna memutuskan apakah program ini layak dilanjutkan ataukah tidak, selain karena diperlukannya penemuan terhadap fokus peningkatan kualitas pembelajaran secara menyeluruh guna menghasilkan rekomendasi dalam menentukan keputusan. Penelitian ini dilakukan dengan menggunakan pendekatan mixed-method desain triangulasi, guna mengevaluasi sebab-sebab efektifitas, kendala ataupun kegagalan pelaksanaan program. Populasi dalam penelitian ini adalah mahasiswa semester III jurusan Pendidikan Kimia UIN Sultan Syarif Kasim Riau, yang didukung oleh dosen, asisten laboratorium dan laboran dan pemilihan sampel dilakukan menggunakan teknik random sampling. Evaluasi program dalam penelitian ini dilakukan menggunakan model CIPP (Context, Input, Process, Product). Hasil penelitian menunjukkan bahwa program ini berjalan cukup efektif jika dilihat dari rata-rata keseluruhan nilai, mulai dari context, input, proses dan produk yang berada pada skor baik dan sangat baik, di mana skor evaluasi context dan input, lebih baik dibanding proses dan produk. Penelitian ini memberikan rekomendasi untuk terus meningkatkan penggunaan pemodelan dan simulasi laboratorium kimia, baik sebagai latihan sebelum praktikum maupun menggantikan praktikum yang sesungguhnya. Kata Kunci: pemodelan; simulasi laboratorium; praktikum kimia  Permalink/DOI: http://dx.doi.org/10.15408/es.v8i2.4394  

Scalability of MOCVD-deposited Hafnium Oxide

2003 ◽  
Vol 765 ◽  
Author(s):  
S. Van Elshocht ◽  
R. Carter ◽  
M. Caymax ◽  
M. Claes ◽  
T. Conard ◽  
...  
Keyword(s):  
Hafnium Oxide ◽  
Interfacial Layer ◽  
Gate Dielectric ◽  
Deposition Process ◽  
Oxide Thickness ◽  
Process Conditions ◽  
Primary Concern ◽  
Gate Electrode ◽  
K Value ◽  
High K

AbstractBecause of aggressive downscaling to increase transistor performance, the physical thickness of the SiO2 gate dielectric is rapidly approaching the limit where it will only consist of a few atomic layers. As a consequence, this will result in very high leakage currents due to direct tunneling. To allow further scaling, materials with a k-value higher than SiO2 (“high-k materials”) are explored, such that the thickness of the dielectric can be increased without degrading performance.Based on our experimental results, we discuss the potential of MOCVD-deposited HfO2 to scale to (sub)-1-nm EOTs (Equivalent Oxide Thickness). A primary concern is the interfacial layer that is formed between the Si and the HfO2, during the MOCVD deposition process, for both H-passivated and SiO2-like starting surfaces. This interfacial layer will, because of its lower k-value, significantly contribute to the EOT and reduce the benefit of the high-k material. In addition, we have experienced serious issues integrating HfO2 with a polySi gate electrode at the top interface depending on the process conditions of polySi deposition and activation anneal used. Furthermore, we have determined, based on a thickness series, the k-value for HfO2 deposited at various temperatures and found that the k-value of the HfO2 depends upon the gate electrode deposited on top (polySi or TiN).Based on our observations, the combination of MOCVD HfO2 with a polySi gate electrode will not be able to scale below the 1-nm EOT marker. The use of a metal gate however, does show promise to scale down to very low EOT values.

Formación Inicial Docente: Una mirada al Proceso de Construcción de Conocimiento Profesional desde la Práctica

2014 ◽  
pp. 143
Author(s):  
Pamela Labra Godoy ◽  
Rodrigo Fuentealba J.
Keyword(s):  
Teacher Education ◽  
Student Teachers ◽  
Social System ◽  
Knowledge Construction ◽  
Educational Context ◽  
Teacher Formation ◽  
Palabras Clave ◽  
The Social ◽  
Application Logic ◽  
Process Product

Resumen: Los procesos de formación de profesores han estado fuertemente influenciados por una lógica aplicacionista y una visión fragmentada y prescriptiva de la naturaleza del conocimiento. Se puede observar una enseñanza basada en la oralidad, en un bajo trabajo práctico y una escasa vinculación con la realidad educativa y los requerimientos del contexto. Se hace necesario que en dichos procesos se reconozca a los futuros profesores como sujetos de conocimiento con quienes se debiese generar una estructura curricular práctica activa y reflexiva.El reconocer la complejidad de los procesos que se llevan a cabo en el contexto educacional, hace necesario transitar desde una lógica instrumental/mecanicista, proceso-producto a una perspectiva epistemológica donde se rescate el dinamismo del ámbito educacional y la complejidad del sistema social en que éste se encuentra inserto. Palabras clave: Formación Inicial Docente - Construcción de Conocimiento Profesional – Prácticas – Reflexión Profesional Abstract Teacher education processes have been heavily  influenced by application logic, as well as, to a fragmented and prescriptive vision of the nature of knowledge, instead of the construction of it. A teaching process based on the predominance of oral discourse, low practical work, and a limited relation with educational reality and context needs, has been  observed. It seems necessary to recognize student - teachers as knowledge subjects with whom there should be an active/reflective curricular activity, and also recognize the complexity of the processes that take place in the educational context. In other words, it is necessary to move from an instrumental, process/ product perspective towards an epistemological perspective able to recognize the dynamism in the educational system and the complexity of the social system in which it is immersed. Key Words: Initial Teacher Formation- Professional Knowledge Construction- Practicum- Professional Reflection

EVALUASI PROGRAM PRAKTEK KERJA INDUSTRI SISWA SMK NEGERI 1 TAPUNG

2018 ◽  
Vol 2 (2) ◽  
pp. 160
Author(s):  
Nasrul Amri Batubara
Keyword(s):  
Mixed Methods ◽  
Monitoring Program ◽  
Input Process ◽  
Sequential Explanatory ◽  
Model Context ◽  
Process Product

Tujuan penelitian ini adalah untuk mengevaluasi pelaksanaan prakerin yang telah dilaksanakan sebagai pedoman perencanaan program prakerin berikutnya.Penelitian ini menggunakan metode kombinasi (mixed methods) dengan desain urutan pembuktian (sequential explanatory). Jenis penelitian ini adalah penelitian evaluasi dengan model Context, Input, Process, Product (CIPP). Informan dalam penelitian ini adalah orang-orang yang terlibat langsung dalam program prakerin dengan responden kelas XI siswa SMK Negeri 1 Tapung, waka humas, panitia prakerin, ketua program keahlian, guru pembimbing dan instruktur dunia usaha/dunia industri. Data penelitian ini dikumpulkan melalui kuesioner berbentuk skala Likert, wawancara, observasi dan studi dokumentasi.Berdasarkan analisis data ditemukan bahwa tingkat ketercapaian pada subvariabel konteks dari program sebesar 80,08% dengan kategori baik, sedangkan pada masing-masing indikator: tujuan program sebesar 85,91%, lingkungan tempat program sebesar 77,45%, kebutuhan program sebesar 76,23%. Pencapaian untuk subvariabel masukan program sebesar 80,45% dengan kategori baik, sedangkan pada masing-masing indikator: sarana prasarana sebesar 79,08%, sumber dana sebesar 75,37%, kurikulum dan relevansi program sebesar 81,25%, tata tertib program sebesar 84,31%, sumber daya manusia sebesar 82,84%. Pencapaian untuk subvariabel proses dari program sebesar 82,00% dengan kategori baik, sedangkan pada masing-masing indikator: persiapan program sebesar 84,68%, pelaksanaan program sebesar 81,76%, monitoring program sebesar 80,19%, penjemputan sebesar 86,27%, kondisi pelaksanaan program sebesar 78,67%. Pencapaian untuk subvariabel hasil program sebesar 85,45% dengan kategori baik, sedangkan pada masing-masing indikator: nilai prakerin sebesar 87,52%, nilai uji kompetensi sebesar 87,94%.

Sign in / Sign up

Export Citation Format

Share Document