Machining High-Temperature Alloys by Means of Solid Ceramic End Mills

Russian Engineering Research - The cutting of high-temperature alloys is considered. The performance of solid ceramic end mills is assessed by experimental comparison of five different designs with...     

Is open innovation always the best for SMEs? An exploratory analysis at the project level

Open innovation (OI) projects are increasingly adopted by small‐ and medium‐sized enterprises (SMEs). Yet, undertaking OI is not only a source of opportunities for SMEs as it can, at the same time, present risks. How SMEs manage the balance between the potential benefits and the emerging challenges of OI is still an overlooked topic in the literature. Using evidence gathered through multiple case studies and drawing upon the relational view of the firm, we explore how and why value creation opportunities and different managerial challenges emerge for SMEs pursuing OI projects. We analyze different stages of OI projects in several different contexts of their implementation. Our analysis sheds light on the different nature and dynamics of knowledge involved within OI projects as important boundary conditions affecting successful search paths, learning processes, and the development of appropriability mechanisms. By offering a contextualized view of OI in SMEs, this study also provides insights to business managers on the situational opportunities and constraints of OI, including managerial suggestions on actions to manage tensions within differing OI projects.     

SHS-produced Co<Superscript>2+</Superscript>Ti<Superscript>4+</Superscript>-doped barium and strontium hexaferrites: Static and dynamic magnetic properties

Static and dynamic magnetic properties of SHS-produced BaFe_12–2x (Co _х Ti _х )O₁₉ (х = 1.0, 1.1, 1.2) and SrFe_12–2y (Co _y Ti _y )O₁₉ (0 ≤ y ≤ 1.0) hexaferrites were characterized by magnetization and FMR measurements. Dynamic properties of SrFe_12–2y (Co _y Ti _y )O₁₉ hexaferrites were rationalized in terms of not only magnetic anisotropy but also the anisotropy of magnetomechanical ratio. SHS-produced ferrites can be recommended for designing radar-absorbent coatings and other SHF devices operating in the range 20–50 GHz.     

Upgrading layout and design solutions in the course of design and construction of the Chirkeiskaya hydroelectric plant

The author describes innovation engineering solutions used in the construction and assembly works of a hydroelectric power plant, which reduce labor consumption and construction time.Translated from Gidrotekhnicheskoe Stroitelstvo, No. 9, September 2004, pp. 7 – 12.     

Focusing properties of two types of diffractive photonic crystal lens

We designed novel two type of binary 2D subwavelength (wavelength was λ= 10 mm) focus diffractive photonic crystal lens and calculated the diffraction of plane TE-wave by use FDTD-method (our program in C++). It has been shown that diffractive photonic crystal lens designs have not an unique solution. It has been also shown the diffractive lens with equal holes in Fresnel zones has better focusing characteristics. Lens diameter was 5 times more than her width and full width half maximum diameter of focal spot was 0.48λ.     

Structure formation and gas evolution in the vacuum liquid-phase sintering of ferrites

Conclusions In the ferrite investigated chains of bubbles and channels constitute the main gas transport routes both between pores and between pores and the surface of a part. They are of complex shape and structure, and are linked together with grain boundaries in a single transport network. Together with gas, the liquid phase is discharged on the surface of the part. Vacuum in the cooling stage once again intensifies the gas and liquid phase discharge process.Translated from Poroshkovaya Metallurgiya, No. 8(284), pp. 30–34, August, 1986.