87 research outputs found
Renormalization of dimension 6 gluon operators
We identify the independent dimension 6 twist 4 gluon operators and calculate
their renormalization in the pure gauge theory. By constructing the
renormalization group invariant combinations, we find the scale invariant
condensates that can be estimated in nonperturbative calculations and used in
QCD sum rules for heavy quark systems in medium.Comment: 4 pages, 2 figure
Light vector correlator in medium: Wilson coefficients up to dimension 6 operators
As an improvement of the QCD sum rule method to study modifications of light
vector mesons in nuclear matter and/or at finite temperature, we calculate the
Wilson coefficients of all independent gluonic non-scalar operators up to
dimension 6 in the operator product expansion (OPE) of the vector channel for
light quarks. To obtain the gluon part of the light quark OPE from the heavy
quark one, we also compute the heavy quark expansion of the relevant quark
condensates. Together with the results for the quark operators that are already
available in the literature, this completes the OPE of the vector channel in a
hot or dense medium for operators up to dimension 6.Comment: 6 pages, no figur
Site-specific growth and density control of carbon nanotubes by direct deposition of catalytic nanoparticles generated by spark discharge
Heavy quarkonium with finite three momentum near
We investigate the non-trivial 3-momentum effects on the masses of heavy
quarkonium states that are moving in a hot medium using QCD sum rules. For all
charmonium states, we observe a negative mass shift near that is less
than 3 at a momentum of 1. Specifically, we first investigate the
difference between the longitudinal and transverse modes of both and
. We find that the transverse mode of the experiences
larger modification than the longitudinal mode, while the has the
opposite behavior. By comparing the and , and also the
unpolarized and , we recognize that the P-wave particles
have stronger momentum dependencies on their masses than the S-wave ones. We
also find (1S) has negligible 3-momentum dependence compared to the
charmonium states, e.g. less than 0.01 even at 1.4 and at a momentum
of 4.Comment: 6 pages, 7 figure
Dialogue Chain-of-Thought Distillation for Commonsense-aware Conversational Agents
Human-like chatbots necessitate the use of commonsense reasoning in order to
effectively comprehend and respond to implicit information present within
conversations. Achieving such coherence and informativeness in responses,
however, is a non-trivial task. Even for large language models (LLMs), the task
of identifying and aggregating key evidence within a single hop presents a
substantial challenge. This complexity arises because such evidence is
scattered across multiple turns in a conversation, thus necessitating
integration over multiple hops. Hence, our focus is to facilitate such
multi-hop reasoning over a dialogue context, namely dialogue chain-of-thought
(CoT) reasoning. To this end, we propose a knowledge distillation framework
that leverages LLMs as unreliable teachers and selectively distills consistent
and helpful rationales via alignment filters. We further present DOCTOR, a
DialOgue Chain-of-ThOught Reasoner that provides reliable CoT rationales for
response generation. We conduct extensive experiments to show that enhancing
dialogue agents with high-quality rationales from DOCTOR significantly improves
the quality of their responses.Comment: 25 pages, 8 figures, Accepted to EMNLP 202
Cyr61 Expression is associated with prognosis in patients with colorectal cancer
BACKGROUND: Cysteine-rich 61 (Cyr61), a member of the CCN protein family, possesses diverse functionality in cellular processes such as adhesion, migration, proliferation, and survival. Cyr61 can also function as an oncogene or a tumour suppressor, depending on the origin of the cancer. Only a few studies have reported Cyr61 expression in colorectal cancer. In this study, we assessed the Cyr61 expression in 251 colorectal cancers with clinical follow up. METHODS: We examined Cyr61 expression in 6 colorectal cancer cell lines (HT29, Colo205, Lovo, HCT116, SW480, SW620) and 20 sets of paired normal and colorectal cancer tissues by western blot. To validate the association of Cyr61 expression with clinicopathological parameters, we assessed Cyr61 expression using tissue microarray analysis of primary colorectal cancer by immunohistochemical analysis. RESULTS: We verified that all of the cancer cell lines expressed Cyr61; 2 cell lines (HT29 and Colo205) demonstrated Cyr61 expression to a slight extent, while 4 cell lines (Lovo, HCT116, SW480, SW620) demonstrated greater Cyr61 expression than HT29 and Colo205 cell lines. Among the 20 cases of paired normal and tumour tissues, greater Cyr61 expression was observed in 16 (80%) tumour tissues than in normal tissues. Furthermore, 157 out of 251 cases (62.5%) of colorectal cancer examined in this study displayed strong Cyr61 expression. Cyr61 expression was found to be associated with pN (p = 0.018). Moreover, Cyr61 expression was associated with statistically significant cancer-specific mortality (p = 0.029). The duration of survival was significantly lesser in patients with Cyr61 high expression than in patients with Cyr61 low expression (p = 0.001). These results suggest that Cyr61 expression plays several important roles in carcinogenesis and may also be a good prognostic marker for colorectal cancer. CONCLUSIONS: Our data confirmed that Cyr61 was expressed in colorectal cancers and the expression was correlated with worse prognosis of colorectal cancers
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