Lightning Strikes: M & K

Indie-dance duo Matt & Kim have wasted no time in the new year: They kicked off a national tour alongside Passion Pit last month, played the legendary Madison Square Garden and saw their fourth studiorelease, Lightning, make it on “must” lists from Entertainment Weekly and Complex magazines—and for good reason. From the determined “Not That Bad” to the danceready single “Let’s Go,” Lightning, produced in their Brooklyn bedroom, follows in true Matt & Kim fashion with giddy beats and playful lyrics. A departure from Matt Johnson and Kim Schifino’s widely-successful 2010 release Sidewalks, “I Wonder” offers new arrangements and tests ideas borrowed from hip-hop and pop chart-toppers. We caught up with Matt to discuss the new album, the art of not-perfect music and streaking through Times Square

Rachael Schlosberg, violin and Jayoung Kim, piano, March 30, 2017

This is the concert program of the Rachael Schlosberg, violin and Jayoung Kim, piano performance on Thursday, March 30, 2017 at 6:00 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performed were Violin Concerto No. 5 in A major, K. 219 by Wolfgang Amadeus Mozart and Violin Concerto in D major, Op. 35 by Pyotr Ilyich Tchaikovsky. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Juhyun Kim, Violin

Violin Sonata No. 21 in E minor, K. 304 / Wolfgang Amadeus Mozart; 6 Duets for Violin and Viola, Op. 19, No. 2, D minor-D major / Hoffmeister; Violin Sonata No. 3 in C minor, Op. 45 / Edvard Grie

The Sznajd dynamics on a directed clustered network

The Sznajd model is investigated in the directed Erdos--Renyi network with the clusterization coefficient enhanced to 0.3 by the method of Holme and Kim (Phys. Rev. E65 (2002) 026107). Within additional triangles, all six links are present. In this network, some nodes preserve the minority opinion. The time tau of getting equilibrium is found to follow the log-normal distribution and it increases linearly with the system size. Its dependence on the initial opinion distribution is different from the analytical results for fully connected networks.Comment: dedicated to Dietrich Stauffer for his 65-th birthda

Observation of a linear temperature dependence of the critical current density in a Ba_{0.63}K_{0.37}BiO_3 single crystal

For a Ba_{0.63}K_{0.37}BiO_3 single crystal with T_c=31 K, H_{c1}=750 Oe at 5 K, and dimensions 3x3x1 mm^3, the temperature and field dependences of magnetic hysteresis loops have been measured within 5-25 K in magnetic fields up to 6 Tesla. The critical current density is J_c(0)=1.5 x 10^5 A/cm^2 at zero field and 1 x 10^5 A/cm^2 at 1 kOe at 5 K. J_c decreases exponentially with increasing field up to 10 kOe. A linear temperature dependence of J_c is observed below 25 K, which differs from the exponential and the power-law temperature dependences in high-Tc superconductors including the BKBO. The linear temperature dependence can be regarded as an intrinsic effect in superconductors.Comment: RevTex, Physica C Vol. 341-348, 729 (2000

Capital as Artificial Intelligence

This article examines science-fictional allegorizations of Soviet-style planned economies, financial markets, autonomous trading algorithms, and global capitalism writ large as nonhuman artificial intelligences, focussing primarily on American science fiction of the Cold War period. Key fictional texts discussed include Star Trek, Isaac Asimov\u27s Machine stories, Terminator, Kurt Vonnegut\u27s Player Piano (1952), Charles Stross\u27s Accelerando (2005), and the short stories of Philip K. Dick. The final section of the article discusses Kim Stanley Robinson\u27s novel 2312 (2012) within the contemporary political context of accelerationist anticapitalism, whose advocates propose working with “the machines” rather than against them

A note on the total number of cycles of even and odd permutations

We prove bijectively that the total number of cycles of all even permutations of $[n]=\{1,2,...,n\}$ and the total number of cycles of all odd permutations of $[n]$ differ by $(-1)^n(n-2)!$, which was stated as an open problem by Mikl\'{o}s B\'{o}na. We also prove bijectively the following more general identity: $$\sum_{i=1}^n c(n,i)\cdot i \cdot (-k)^{i-1} = (-1)^k k! (n-k-1)!,$$ where $c(n,i)$ denotes the number of permutations of $[n]$ with $i$ cycles.Comment: 4 pages, 2 figures, final versio

Operator-Valued Norms

We introduce two kinds of operator-valued norms. One of them is an $L(H)$-valued norm. The other one is an $L(C(K))$-valued norm. We characterize the completeness with respect to a bounded $L(H)$-valued norm. Furthermore, for a given Banach space $\textbf{B}$, we provide an $L(C(K))$-valued norm on $\textbf{B}$. and we introduce an $L(C(K))$-valued norm on a Banach space satisfying special properties.Comment: 8 page