Conformal blocks from celestial gluon amplitudes. Part II. Single-valued correlators

In a recent paper, here referred to as part I, we considered the celestial four-gluon amplitude with one gluon represented by the shadow transform of the corresponding primary field operator. This correlator is ill-defined because it contains branch points related to the presence of conformal blocks with complex spin. In this work, we adopt a procedure similar to minimal models and construct a single-valued completion of the shadow correlator, in the limit when the shadow is “soft.” By following the approach of Dotsenko and Fateev, we obtain an integral representation of such a single-valued correlator. This allows inverting the shadow transform and constructing a single-valued celestial four-gluon amplitude. This amplitude is drastically different from the original Mellin amplitude. It is defined over the entire complex plane and has correct crossing symmetry, OPE and bootstrap properties. It agrees with all known OPEs of celestial gluon operators. The conformal block spectrum consists of primary fields with dimensions ∆ = m + iλ, with integer m ≥ 1 and various, but always integer spin, in all group representations contained in the product of two adjoint representations.

Keep It Halal! A Smartphone Ethnography of Muslim Dating

This article reveals how Muslim religious identity is impacted by Muslim dating apps. The development of Muslim dating apps within the last decade has led to Muslims seeking partners beyond their physical and social locality. The following research takes inner-Muslim discursive traditions into account in order to examine how Muslim males articulate and negotiate their Islamic identity in the process of partner selection. The research’s methodological approach draws from digital ethnography, with the smartphone as the primary field site. The smartphone ethnography on the app of Muzmatch will demonstrate that users are physically embedded in doctrinally heterogenous contexts. Yet, the religious framework of the app promotes a “doctrinal homogeneity” that finds expression via the discursive articulations of the app users. It will be shown that users are being shaped by the app as they incorporate the religious framework provided by it.

Welfare, Relief, Political Power

The chapter shows how different political and social circumstances shaped Zionist opportunities for influence in local communities. Relief work constituted the main battleground between the various parties and determined how Zionists worked to gain respect and credibility through their engagement. Welfare and relief were not only essential to reduce the suffering of the Jewish population but also became the primary field of activism for all Jewish political movements. Using local examples from German-occupied Poland and Ober Ost, from Galicia, Vienna, and Prague, the chapter investigates struggles for control over relief funds and the building of welfare institutions, as well as their connection with Zionist political ideas. It analyses welfare work for refugees in Vienna, soup kitchens in Białystok, and attempts to find work for unemployed Jews in Warsaw. Within months after the outbreak of the war, relief work became the only area in which activists were engaged. The ramifications of these efforts were often contradictory. Whereas in the Ober Ost region, for example, Zionists were integrated into the German administration and applied top-down, authoritarian policies towards local communities, in the Generalgouvernement Warschau, they remained outside the administration and had to rely on grassroots activities and on the energetic efforts of their members. The chapter also analyses relief efforts for refugees in Vienna and Prague, and shows how Zionist activists in Galicia acquired positions as leading figures in communities, taking over communal responsibilities after the Austrian order had disintegrated.

Religious Pluralism Among the Navayana Buddhist Women: A Study in Mumbai Metropolitan Region, India

Dr B. R. Ambedkar adopted the policy of ‘religious conversion’ to provide social justice to the Mahars—an untouchable community in the state of Maharashtra. Nearly, three and a half million people accepted Navayana Buddhism on a single day under his leadership, denouncing Hindu gods and goddesses and vowed not to accept untouchable status imposed by the caste-Hindu population. Contrary to such a radical departure from Hinduism, there is evidence that a substantial chunk of the people still follows Hindu traditions and beliefs and practices, exhibiting a culture of religious pluralism. Based on a primary field study conducted among the Navayana Buddhist women in Mumbai Metropolitan Region, the article examines and explains the causes of such manifestation in the studied population’s religious life.

Research on 3D SIP Conjugate Gradient Inversion Algorithm with Parameter Range Constraints

3D SIP inversion algorithm involves multiple parameters, and the key is the calculating speed and memory. A whole set of quasi-linear (QL) theories has taken shape in recent years, including the QL approximation method proposed by Zhdanov, quasi-analytic approximation, and localized quasi-linear (LQL) approximation. They are characterized by high speed and accuracy in electromagnetic field numerical modeling. The above-based 3D QL inversion algorithm, boasting quicker calculating speed plus more stable and favorable inversion effect, has been adopted profoundly in electromagnetic prospecting, whereas its frequent source conversion requires recalculating the dyadic Green’s function and primary field each time, thus delaying the 3D SIP modeling speed. This study makes use of the spatial symmetry in the primary field and Green function to propose an effective and quicker QL forward modeling method, which has the hallmark of higher calculating speed owing to less calculating times, and makes feasible the 3D SIP conjugate gradient inversion algorithm with Cole–Cole parameter range constraints.

Transient electromagnetic smoke rings in a halfspace during active transmitter excitation

The smoke ring concept is a useful device for understanding how the electromagnetic fields induced in a 1-D earth propagate and diffuse through a medium. Aside from facilitating a physical understanding of field propagation, the smoke ring concept has been used to interpret behavior of vertical and radial magnetic fields at the surface and used to estimate depth of penetration for conductivity-depth transforms. Past studies have focused on the current distribution during the off-time. We calculate and illustrate the current in a halfspace from a half-sine excitation (which provides a continuous induction). In comparison, the current pattern from a continuously excited waveform is more densely distributed near-surface than the off-time current system, suggesting that measurements during a continuously excited on-time are more sensitive to shallow targets. For airborne applications, where the primary field coupling changes and is an important noise source, a primary field-stripping algorithm impacts the current distribution but does not deleteriously affect near-surface sensitivity.

The Serbian tax policy for a new digital age: Some proposals while we wait for a general tax reform

This paper addresses the topic of how to help Serbian employers fight for our domestic talent with foreign competition, as due to modern technologies, in the better part of our service sector the Serbian workforce has entered the global market. The author adds to this concern the need to transform the Serbian economy from a service provision one to a model centred around high value creation of domestically owned IP. The Serbian creative industry or, to be more precise, its IT sector, is used as the primary field of research, and its own and fiscal policy makers attempts to align the aforementioned two interests are outlined starting from 2018. Based on the developments so far the author proposes a set of tax measures aimed at facilitating the transition of the current Serbian economy into a 4.0 format, wherein the fight to maintain Serbian talent in Serbia and within Serbian employers plays a crucial role.

Editional textual studies of folklore and practice of folkloristic translation

The paper discusses the procedures of editional textual criticism directly related to the quality of the translation of a folklore text into another language. The quality of the basic text to be translated depends on the skill and care of the person who transcribes the audio recording. Er-rors in this textual procedure can lead to distortion of the meaning of the text. The primary (field) handwriting almost always requires processing without introducing unnecessary elements into the text. A problem for a textologist is that many minority languages do not have normative graphics and even an approved, generally accepted alphabet. Another side of the same problem is the publication of texts recorded or previously published in a different spelling. In many dialects, the same or similar words may have different meanings, may differ stylistically. As pertains to the loan words, not only is it imperative to comment on borrow-ings in editional textual work but also to check their meaning. The distortions, intentional or involuntary, can affect the entire model of the world, the system of traditional ideas of the people expressed in the folklore text. A necessary procedure is the final verification of the original text with both audio recording and with other similar texts of the same folklore tradition. The author comes to the conclusion that an attentive attitude to the described stages of editional textual work can significantly improve the translation of a folklore text.