117 research outputs found
Bernard-Soulier syndrome caused by a novel insertional mutation in the glycoprotein IB alpha gene
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Spinal Hematoma Unrelated to Previous Surgery: Analysis of 15 Consecutive Cases Treated in a Single Institution Within a 10-Year Period
No full textComplex aesthetic treatment of patients with multiple caries
No full textBackground: The need for dental esthetics is very important in recent years. Fulfilling aesthetic demands with both noninvasive and minimally invasive techniques can maintain tissue continuity. A 38 year old female patient came to the clinic
with an esthetic complaint of maxillary anterior teeth. The following case report describes a step by step complex aesthetic
treatment of a patient with multiple caries. Appealing aesthetic results will restore the patient’s smile through restorative
treatment in dentistry. Purpose: The purpose of this case report is to explain the management of complex aesthetic treatment
of patients with multiple caries Case: A 38-year-old female patient complained her upper front teeth is turning black. The
patient complained that her teeth had hurt ± 3 months ago and sometimes felt sore. The patient wants her teeth to be treated
because she feels less confident when she smiles and wants to fix these teeth. The history of treatment on the tooth in question
have had root canal treatment and been filled since 8 years ago. The tooth has had braces (orthodontic) treatment and was
removed ± 7 years ago. The patient stated that she had no systemic health disorder. Case management : The treatment of
this complex case were done using root canal treatment, endodontic retreatment, direct and indirect veneer, dowel, and
crown. Conclusion: complex aesthetic treatment of patients with multiple were done aiming for good aesthetic resul
Analisis Pengaruh Penambahan Cr2O3 Dan Parameter q- Value Particle Size Distribution (PSD) Dengan Pendekatan Modified Andreassen Equation Al₂O₃ Terhadap Sifat Mekanik, Sifat Fisik, Dan Ketahanan Terhadap Alkali Attack Pada High Alumina Refractory Brick
No full textDalam industri semen, melibatkan suhu tinggi selama proses pembakaran bahan baku yang nantinya akan menjadi komponen utama pada industri semen. Proses ini dilakukan menggunakan peralatan seperti rotary kiln, yang mana memiliki kondisi operasi yang ekstrem, paparan suhu tinggi, abrasi mekanis, serta reaksi kimia dari gas. High alumina refractory brick sering kali mengalami serangan alkali di rotary kiln yang menyebabkan umur pakai menurun. Serangan alkali oleh K2CO3 menurunkan struktur dari material refraktori, meningkatkan porositas, dan menurunkan sifat mekaniknya. Oleh karena itu, penelitian ini bertujuan untuk menganalisis pengaruh variasi penambahan Cr₂O₃ sebanyak 0%, 2%, 4% serta penggunaan alumina dengan berbagai jenis ukuran mesh (16, 24, 60, 80, 100, 120, dan 325) menggunakan metode Particle Size Distribution (PSD) Al₂O₃ (q= 0,25 dan 0,3) berdasarkan Modified Andreassen Equation terhadap sifat mekanik serta ketahanan terhadap serangan alkali pada bata tahan api. Material yang digunakan pada penelitian ini dilakukan pengujian karakterisasi dengan X-ray Diffraction (XRD) dan Scanning Electron Microscope Energy Dispersive X-ray (SEM-EDX), juga dilakukan bulk density, ketahanan abrasif, kuat tekan, apparent porosity, water absorption, dan alkali attack pada benda uji high alumina refractory brick. Analisis material menunjukkan bahwa penambahan 2% Cr₂O₃ (C2) dan variasi distribusi partikel q=0,25 (A25) secara sinergis menghasilkan performa terbaik. Komposisi C2 terbukti optimal dalam meningkatkan sebagian besar properti, seperti menghasilkan bulk density tertinggi (2,80 g/cm³), porositas terendah, dan ketahanan alkali superior berkat terbentuknya fasa eskolaite yang homogen. Namun, penambahan Cr₂O₃ ini memiliki kelemahan berupa peningkatan nilai abrasi. Di sisi lain, formulasi dengan distribusi partikel q=0,25 (A25) menunjukkan keunggulan signifikan pada sifat mekanik dan kimia, dengan nilai Cold Crushing Strength (CCS) tertinggi (37,99 MPa), ketahanan abrasi terbaik (24,97 cm³), dan resistensi alkali yang lebih unggul dibandingkan formulasi q=0,3 (A3) yang hanya sedikit lebih baik dalam hal kepadatan. Hal ini mengindikasikan adanya trade-off di mana optimasi sifat fisik (kepadatan) dan sifat mekanik-kimia (kekuatan dan ketahanan) dipengaruhi oleh parameter yang berbeda.
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materials, which will later become the main components in the cement industry. This process is carried out using equipment such as rotary kilns, which operate under extreme conditions, including exposure to high temperatures, mechanical abrasion, and chemical reactions from gases. High alumina refractory bricks often experience alkali attacks in rotary kilns, leading to a reduction in their service life. Alkali attacks by K2CO3 degrade the structure of the refractory material, increase porosity, and reduce its mechanical properties. Therefore, this research aims to analyze the effect of adding Cr₂O₃ in variations of 0%, 2%, and 4%, as well as the use of alumina with various mesh sizes (16, 24, 60, 80, 100, 120, and 325) using the Particle Size Distribution (PSD) method for Al₂O₃ (q = 0.25 and 0.3) based on the Modified Andreassen Equation, on the mechanical properties and resistance to alkali attacks in refractory bricks. The materials used in this study were characterized using X-ray diffraction (XRD) and Scanning Electron Microscope Energy Dispersive X-ray (SEM-EDX). Tests were also conducted for bulk density, abrasion resistance, compressive strength, apparent porosity, water absorption, and alkali attack on high alumina refractory brick specimens. Material analysis reveals that the addition of 2% Cr₂O₃ (C2) and a particle size distribution of q=0.25 (A25) are key to achieving the best performance. The C2 composition proved optimal for enhancing most properties, yielding the highest bulk density (2.80 g/cm³), lowest porosity, and superior alkali resistance, thanks to the formation of a homogeneous eskolaite phase. However, this addition had the drawback of increasing abrasion loss. On the other hand, the formulation with a particle distribution of q=0.25 (A25) demonstrated significant superiority in mechanical and chemical properties, delivering the highest Cold Crushing Strength (CCS) at 37.99 MPa, the best abrasion resistance (24.97 cm³), and better alkali resistance compared to the q=0.3 (A3) formulation, which was only marginally better in terms of physical density. This indicates a clear trade-off, where the optimization of physical properties (density) versus mechanical-chemical properties (strength and resistance) is influenced by different parameters
Fundamental elements of the food waste reduction process. The case of agritourism pensions in Romania
No full textFood waste is a generalized process that affects both the environment and resources (natural, financial, sanitary, etc.). The negative effects are felt both at the individual level (household budget) and at the society level, and they are, as a rule, difficult to combat. From the existing quantitative and qualitative analyses, it was observed that food waste at household level represents over 50% of its total volume, even if food waste is produced throughout the supply chain. It is also noted that some economic sectors, by the nature of their activities, have a greater predilection to waste food (eg HoReCa or large retail stores). The case study carried out concerning the agro-tourist guesthouses in the mountainous area of Romania showed that, at their level, food waste has a reduce dimension. This is due to the household spirit and the ethical and spiritual values passed down from generation to generation, to which is added the love and respect for Romania's mountains.
Solutions to reduce this phenomenon take different forms of manifestation, from awareness of the phenomenon itself to rethinking portions, promoting good practices, innovative packaging, etc. Considering the above, the article aims to contribute to a better knowledge of the phenomenon of food waste and to the identification of viable solutions by which this phenomenon can be tackled
A test-bed for network performance evaluation of IPv4 & IPv6 in network layer protocol
No full textThis paper represents in a test-bed performed to measure and evaluates the performance of IPv4 and IPv6 network. The installation and running the test-bed was done for IPv4 and IPv6, using three metrics, bandwidth, packet loss and jitter. The result is that, the bandwidth size will lead to loss some packets during the streaming, while jitter leads to non-sequential packet arrival to the destination. The overall results indicate that the IPv4 network performs better than IPv6 network in term of bandwidth and packet loss. The IPv6 network performs better than IPv4 network in term of jitter. The IPv6 occur high bandwidth compare to IPv4. So the IPv6 network needs component that provide a high performance in network
Halaqah ilmu (kuliah Maghrib)
No full textBahagian Hal Ehwal Islam, Pejabat Pemerkasaan Adiwangsa (PPA) UiTM Shah Alam telah menganjurkan program Halaqah Ilmu (Kuliah Maghrib) bertempat di Dewan Solat Utama, Masjid UiTM Shah Alam sepanjang bulan Jun 2025
Fundamental elements of the food waste reduction process. The case of agritourism pensions in Romania
No full textFood waste is a generalized process that affects both the environment and resources (natural, financial, sanitary, etc.). The negative effects are felt both at the individual level (household budget) and at the society level, and they are, as a rule, difficult to combat. From the existing quantitative and qualitative analyses, it was observed that food waste at household level represents over 50% of its total volume, even if food waste is produced throughout the supply chain. It is also noted that some economic sectors, by the nature of their activities, have a greater predilection to waste food (eg HoReCa or large retail stores). The case study carried out concerning the agro-tourist guesthouses in the mountainous area of Romania showed that, at their level, food waste has a reduce dimension. This is due to the household spirit and the ethical and spiritual values passed down from generation to generation, to which is added the love and respect for Romania's mountains.
Solutions to reduce this phenomenon take different forms of manifestation, from awareness of the phenomenon itself to rethinking portions, promoting good practices, innovative packaging, etc. Considering the above, the article aims to contribute to a better knowledge of the phenomenon of food waste and to the identification of viable solutions by which this phenomenon can be tackled
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