RSA algoritmasının Raspberry Pi üzerinde gerçeklemesine elektromanyetik yayınım analizi

In this paper, security analysis of RSA implementation on a Raspberry Pi against electromagnetic radiation analysis is evaluated. Two different RSA algorithm is implemented on Raspberry Pi. Simple Electromagnetic Analysis and Differential Electromagnetic Analysis attacks are performed. Using Simple Electromagnetic Analysis attack on an unprotected implementation, all key bits are found with one measurement. Also, Differential Electromagnetic Analysis attack is performed against an improved implemantation that has countermeasure against Simple Electromagnetic Analysis attack. One key bit is found using 2500 measurements with a correlation analysis in Differential Electromagnetic Analysis attack

EFFECTS OF EDGE COVERING ON TENSILE STRENGTH OF MDF

Dowels, 6, 8 and 10 mm ? diameters were bonded with PVAc adhesive on Medium Density Fiberboard (MDF). Edges were covered with 5, 8 and 12 mm beech wood materials, drilled 25 mm depth. Tensile strength measurments were made on the samples. The highest tensile strength value was given as 6 mm ? dowel and MDF covered with 8 mm thickness beech wood material (2.294 N/mm2), the lowest value was obtained with 10 mm ? dowel and with unprocessed MDF (1.314 N/mm2)

COMBUSTION PROPERTIES OF EUCALYPTUS WOOD

In this study, the combustion properties of some impregnation materials (abiotic and biotic factors) used for eucalyptus wood in interior or exterior environments were investigated. The experimental samples were prepared from Eucalyptus wood based on ASTM-D-1413-76 Tanalith-CBC, boric acid, borax, vacsol-WR, immersol-WR, polyethylen glycole-400 and ammonium sulphate were used as an impregnation material. The results indicated that, vacuum treatment on Eucalyptus gave the lowest retention value of salts. Compounds containing boron+salt increased fire resistance however water repellents decreased the wood flammability

Fire Reterdant Chemicals Affecting Combustion Resistance of Wood

Yapı malzemesi olarak kullanılan ağaç malzeme bu maksatla kullanılan diğer malzemelerden üstün özelliklere sahip olmakla beraber, biyotik ve abiyotik zararlılardan olumsuz etkilenmektedir. Bu nedenle koruyucu kimyasal maddelerle emprenye edildikten sonra kullanılması önerilmektedir. Bu çalışmada, ağaç malzemeyi koruyucu kimyasal maddelerden suda çözünen tuzlarla emprenye etmenin yanmaya karşı dayanıklılığı üzerine etkileri araştırılmıştır. Bu maksatla yaygın olarak kullanılan sarıçam (Pinus sylvestris L.) ve doğu kayını (Fagus orientalis Lipsky) odunları ile, emprenye maddesi olarak; potasyum nitrat (KNO3), çinko sülfat (ZnSO4), sodyum tetra borat (Na2 B4 O7), sodyum sülfat (Na2SO4) ve bakır sülfat (Cu2SO4) kullanılmıştır. Emprenye metodu olarak uzun süreli daldırma ve 1 saat vakum-1 saat basınç, 30 dakika vakum-30 dakika basınç olmak üzere dolu hücre metodları uygulanmıştır. Emprenye edilen numunelerde, alev kaynaklı ve alev kaynaksız yanma sırasında oluşan ağırlık kayıpları esas alınarak yapılan değerlendirme sonuçlarına göre; Cu2SO4, ZnSO4 ve Na2SO4 sarıçam ve kayında yanmaya dayanıklılık kazandırmışlardır. Bu bakımdan dolu hücre metodu ile yapılan emprenye işlemi daha etkili bulunmuştur.Wood is an important material used in construction elements. However since it can be affected by biotic and abiotic deteriorating agents, it should be treated with chemical impregnating materials prior to use.In this study, the effects of water-soluble impregnating chemicals on the combustion resistance of wood was investigated. For this purpose, panels were prepared with oriental beech wood (Fagus orientalis L.) and pine wood (Pinus silvestris L.), which are widely used in industry. These panels were impregnated with potassium nitrate (KNO3), zinc sulfate (Zn SO4), sodium tetra borate (Na2 B4 O7), sodium sulfate (Na2 SO4) and copper sulfate (Cu2SO4). Two different methods were used for impregnation of the wood samples: extended dipping without pressure, and and full cell with either 60 minutes vacuum-60 minutes pressure, or 30 minutes vacuum-30 minutes pressure.The amount of weight lost during flame- and non-flame burning showed that impregnation with Cu2SO4, Zn SO4 and Na2 SO4 increased the fire resistant of pine and oriental beech wood. For this reason, the full-cell method is more effective in impregnation