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News Article | April 18, 2017
Site: www.prweb.com

A coalition of South Los Angeles (SLA) community organizations will mark the 25th anniversary of the 1992 SLA Uprising with a mass mobilization that includes a rally, march, and community festival on Saturday, April 29, beginning at the historic intersection of Florence and Normandie where the 1992 Uprising ignited. The event is part of a larger alliance between more than 35 SLA organizations implementing community-led solutions to systemic injustices and ensuring that community’s vision for the future of SLA is realized. The event will include speeches by several prominent community leaders, activists and youth from South Los Angeles, a drum invocation by Jishinbalki, Mama Nay Nay's, Cuauhtemoc & DJ Sloe Poke and musical guests Mariachi Arcoiris, Al Jackson, Josef Leimburg, Cuicani, DJ Phatrick, Medusa, Los Rakas. United under the Solidarity Statement: “South LA is the Future: A Community Vision for a healthy and just future of Los Angeles,” the group of organizations, health care providers, schools, government agencies, residents, and youth are highlighting issues, from law enforcement suppression, housing insecurity economic divestment and environmental racism, that contributed to the 1992 social rebellion and persist today, and promoting community-driven policy innovations. “Between the 1965 Uprising and 1992, conditions of structural racism that led to the rebellions, remained in place,” said Pete White, founder and co-director of Los Angeles Community Action Network. Once a vibrant neighborhood with black-owned businesses and factory jobs, SLA suffered decades of deindustrialization, disinvestment and wayward policy decisions stifled growth and development. Beyond a loss of jobs, welfare reform, the 1994 Federal Crime Bill, NAFTA and now gentrification exacerbated conditions that created community tension and hopelessness. “This was not a riot but an uprising against a system that is working against you.” The community partners initially came together through the South Los Angeles Building Healthy Communities (SLA BHC) collaborative, a group of diverse partners working to make SLA a healthier place to live, work, and play. Building Healthy Communities (BHC) is a 10-year, $1 billion comprehensive community initiative launched by the California Endowment in 2010 to advance statewide policy, change the narrative, and transform 14 of California’s communities most devastated by health inequities into places where all people have an opportunity to thrive. Tamu Jones, program officer for SLA BHC, says community organizing there is fairly sophisticated and advanced – and is recognized even nationally in terms of building movements and innovating in policy solutions. “Over the past 25 years, the people of South LA have developed models of community building to address the root causes of social unrest and health disparities,” said Jones. “They are creative and resilient and self directed. Their innovation in community organizing is built on the larger social justice movement that folks in SLA have been engaged in for decades. It is bigger than the 35 organizations and has great implications for the whole city and even beyond.” Last month, the SLA BHC coalition gathered at a Town Hall meeting as a reunion of their collective commitment and celebration to multi-racial organizing. Beyond the April 29 event, the community partners aim to challenge unjust public policies and to build a process for ongoing political education. A central component of the movement is working to uplift the stories about the 1992 LA Uprising and create a more authentic narrative that captures the creativity and resilience within the diverse communities. “Too often narratives of South Los Angeles are marked by its deficits and what its residents don’t have,” said Lola Smallwood Cuevas, director of the Los Angeles Black Worker Center. “SLA reflects one of LA’s greatest assets. Located here are residents with a rich history of struggle and innovative approaches that have worked to bridge deep and wide economic and racial divides. Look at the positives coming out of the area. Residents who have solutions for how to solve the housing crisis, people taking over housing; black workers with successful strategies for increasing access to quality jobs in construction and other growth industries. Like so many innovative sectors of Los Angeles. SLA is a socio-economic innovative laboratory that’s using transformative practices from the bottom up. It comes out of a lot of struggles and harm that residents are repairing.” A New Way of Life Advancement Project Alliance of Californians for Community Empowerment (ACCE) Brotherhood Crusade CADRE CDTech Community Coalition (CoCo) Community Health Councils (CHC) Dignity & Power Now (DPN) Esperanza Community Housing Corporation Genders & Sexualities Alliance Network (GSA Network) LA Commons Labor/Community Strategy Center (LCSC) Legal Aid Foundation of Los Angeles (LAFLA) Los Angeles Black Worker Center (LA BWC) Los Angeles Community Action Network (LA CAN) Los Angeles Metropolitan Churches (LAM) Los Angeles Neighborhood Land Trust (LANLT) Physicians for Social Responsibility-Los Angeles (PSR-LA) Southside Coalition of Community Health Centers St. John’s Well Child & Family Center Strategic Actions for a Just Economy (SAJE) Strategic Concepts in Organizing & Policy Education (SCOPE) T.R.U.S.T. South LA UMMA Community Clinic Youth Justice Coalition (YJC)

Song I.-H.,Korea Institute of Materials Science | Park M.-J.,Korea Institute of Materials Science | Kim H.-D.,Korea Institute of Materials Science | Kim Y.-W.,University of Seoul | Bae J.-S.,YJC Co.
Journal of the Korean Ceramic Society | Year: 2010

The achievement of high gas permeability is a key factor in the development of porous SiC ceramics for applications of hot gas filter, vacuum chuck, and air spindle. However, few reports on the gas permeability of porous SiC ceramics can be found in the literature. In this paper, porous SiC ceramics were fabricated at temperatures ranging from 1600°C to 1800°C using the mixing powders of SiC, silicon, carbon and boron as starting materials. In some samples, expanded hollow microspheres as a pore former were used to make a cellular pore structure. It was possible to produce Si bonded SiC ceramics with porosities ranging from 42% to 55%. The maximum bending strength was 58 MPa for the carbon content of 0.2 wt% and sintering temperature of 1700°C. The increase of air permeability was accelerated by addition of hollow microsphere as a pore former.

Na S.-M.,YJC Co. | Go S.-I.,YJC Co. | Lee S.-J.,Mokpo National University
Journal of the Korean Ceramic Society | Year: 2011

Aluminum nitride (AlN) has excellent thermal conductivity, whereas it has some disadvantage such as low sinterability. In this study, the effects of sintering additive content and sintering condition on thermal conductivity of pressureless sintered AlN ceramics were examined on the variables of 1∼3 wt% sintering additive (Y2O3) content at 1900 °C in N2 atmosphere with holding time of 2∼10 h. All AlN specimens showed higher thermal conductivity as the Y2O3 content and holding time increase. The formation of secondary phases (yttrium aluminates) by reaction of Y2O3 and Al2O3 from AlN surface promoted the thermal conductivity of AlN specimens, because the secondary phases could reduce the oxygen contents in AlN lattice. Also, thermal conductivity was increased by long sintering time because of the uniform distribution and the elimination of the secondary phases at the grain boundary by the evaporation effect during long holding time. A carbothermal reduction reaction was also affected on the thermal conductivity. The thermal conductivity of AlN specimens sintered at 1900 °C for 10 h showed 130∼200W/mK according to the content of sintering additive.

Lim K.Y.,University of Seoul | Kim Y.-W.,University of Seoul | Song I.-H.,Korea Institute of Materials Science | Bae J.-S.,YJC Co.
Journal of the Korean Ceramic Society | Year: 2011

Macroporous silicon carbide (SiC) ceramics were fabricated by powder processing and polymer processing using carbon-filled polysiloxane as a precursor. The effects of the starting SiC polytype, template type, and template content on porosity and flexural strength of macroporous SiC ceramics were investigated. The β-SiC powder as a starting material or a filler led to higher porosity than aα-SiC powder, owing to the impingement of growing aα-SiC grains, which were transformed from β-SiC during sintering. Typical flexural strength of powder-processed macroporous SiC ceramics fabricated from aα-SiC starting powder and polymer microbeads was 127 MPa at 29% porosity. In contrast, that of polymer-processed macroporous SiC ceramics fabricated from carbon-filled polysiloxane, β-SiC fillers, and hollow microspheres was 116MPa at 29% porosity. The combination of aα-SiC starting powder and a fairly large amount (10 wt%) of Al2O 3-Y2O3 additives led to macroporous SiC ceramics with excellent flexural strength.

Lim K.Y.,University of Seoul | Kim Y.-W.,University of Seoul | Song I.-H.,Korea Institute of Materials Science | Kim H.-D.,Korea Institute of Materials Science | Bae J.S.,YJC Co.
Journal of the Korean Ceramic Society | Year: 2010

Porous frit-bonded alumina ceramics were fabricated using alumina and frit as raw materials. The effects offrit content and sintering temperature on microstructure, porosity, and flexural strength were investigated at low temperature of 750-850°C Increased addition of frit content or higher sintering temperature resulted in improved flexural strength of porous frit-bonded alumina ceramics. It was possible to produce frit-bonded alumina ceramics with porosities ranging from 35% to 40%. A maximum strength of 52 MPa was obtained at a porosity of -38% when 90 wt% alumina and 10wt% frit powders were used.

Kim S.-I.,YJC Co | Go S.-I.,YJC Co | Lee S.-R.,Mokpo National University | Lee S.-J.,Mokpo National University
Journal of Ceramic Processing Research | Year: 2013

The effects of debinding condition on the thermal conductivity of AlN pressureless sintered at 1850°C for 5 h in a N2 atmosphere were investigated. Spray dried AlN powder compacts incorporating 3 ~ 5 wt% Y2O3 sintering additive and 0.5 wt% PVB binder were calcined in air or a N2 atmosphere for binder burn-out. The debinding condition affected the second phase, the second phase distribution, and the thermal conductivity of the sintered AlN samples. All sintered AlN samples were densified to higher than 98% theoretical density. The sample debinded in a N2 atmosphere showed higher thermal conductivity (170W/mk) than that of the sample debinded in an air atmosphere (< 140 W/mk). In the sample debinded in the air atmosphere, a YAG phase, Y3Al5O12, was observed as the secondary, intergranular phase showing a wide distribution. On the other hand, when the debinding process was conducted in a N2 atmosphere, Y4Al2O9, YAlO3 and Y2O3 phases were observed at the triple point, and the sample color was different at the sample surface and interior due to the residual carbon. In this study, a commercial, spray dried AlN powder was also sintered and examined to confirm the obtained results.

Na S.-M.,YJC Co. | Lee S.-J.,Mokpo National University
Journal of the Korean Ceramic Society | Year: 2013

Porcelain with high thermal shock resistance was successfully fabricated by a lithium solution infiltration method with a lithium hydroxide solution. Lithium hydroxide solutions having various lithium concentrations were infiltrated into pre-sintered porcelain bodies. The porcelain sample infiltrated by the 9 wt% lithium solution and heat treated at 1250 °C for 1 h showed a low thermal expansion coefficient of 1.0 × 10-6/°C with excellent thermal shock resistance. The highly thermally resistant porcelain had a welldeveloped β-spodumene phase with the general phases observed in porcelain. Furthermore, the porcelain showed a denser structure of 2.41 g/cm3 sintering density and excellent whiteness in comparison with commercial thermally resistible porcelains. The lithium hydroxide in the samples readily reacted with moisture, and liquid phase reactants were formed during the fabrication process. In the case of an excess amount of lithium in the sample body, the lithium reactants were forced to the surface and re-crystallized at the surface, leaving large pores beneath the surface. These phenomena resulted in an irregular structure in the surface area and led to cracking in samples subjected to a thermal shock test.

This invention relates to a fireproof container with improved circulation of heat and safer use. According to an embodiment of this invention, a fireproof container, to be loaded in an industrial furnace to perform a thermal treatment of a powder or a target, includes a prominent member formed on the outer walls thereof Also, according to another embodiment of this invention, a fireproof container for use in thermal treatments has a hexahedral shape with a space having a predetermined volume in which a powder or a target to be thermally treated is placed, and includes a protrusion block having a predetermined shape formed on at least one of the external front surface, rear surface, left side surface, and right side surface of the fireproof container.

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